CN112146144A

CN112146144A - Fume exhaust fan

Info

Publication number: CN112146144A
Application number: CN202010967340.7A
Authority: CN
Inventors: 张永思; 潘叶江
Original assignee: Vatti Co Ltd
Current assignee: Vatti Co Ltd
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2020-12-29

Abstract

The invention discloses a range hood, wherein a range hood main body is provided with an air inlet and comprises a first oil screen, a second oil screen, a driving device and a panel assembly, wherein the first oil screen and the second oil screen are arranged at the position of the air inlet, one end of the first oil screen is hinged on the range hood main body, the other end of the first oil screen is hinged with one end of the second oil screen, the other end of the second oil screen is hinged on the middle part of the panel assembly, the upper end of the panel assembly is in sliding connection with the range hood main body, the output end of the driving device is connected with the first oil screen to drive the first oil screen to do turnover motion, the second oil screen is driven to do turnover motion through the action of the first oil screen, the panel assembly is finally driven to be unfolded outwards, and the air inlet is enlarged or reduced through the combined action of the first oil screen, the second oil. The structure is simple, the negative pressure area of the air inlet of the range hood can be further moved downwards, and the smoking area of the air inlet is further enlarged.

Description

Fume exhaust fan

Technical Field

The invention relates to the technical field of kitchen electricity, in particular to a range hood.

Background

In the related technology, most of top-suction type range hoods have a large and deep smoke collecting cavity, so that the oil smoke can be effectively collected to prevent escape and diffusion, but the shortcomings are that the installation position is limited, the range hood cannot be installed too low, and the range hood is easy to collide with the head and drip oil; the cross-boundary type and side-suction type range hoods have the advantages that the heads are not easy to touch, the negative pressure area of the air inlet is close to the oil fume generation area, the appearance is fashionable, but the range hoods have general oil fume collecting effect and relatively small suction force, oil is easy to accumulate at the bottom, and the range hoods are not suitable for the cooking environment with large oil fume. The action mechanism that above model increased restricts the appearance structure of former organism all the time to the performance promotion of product, can not exert better smoking air inlet effect, simultaneously because side-draught type cigarette machine smoking mouth is nearer with fan noise source, makes machine noise at work great, and then influences user experience.

The effect of the range hood depends on the distance between the negative pressure area of the air inlet and the oil smoke generation area and the size of the smoke collecting area of the smoke collecting cavity, and how to combine the advantages of the large smoke collecting area of the smoke collecting cavity of the top-suction range hood and the short distance between the negative pressure area of the side-suction range hood and the oil smoke generation area is a technical problem which needs to be broken through by technicians in the industry at present.

Disclosure of Invention

The invention aims to solve at least one of the problems in the prior related art to a certain extent, and therefore, the invention provides the range hood which is simple in structure, can enable the negative pressure area of the air inlet of the range hood to move downwards further, and can further enlarge the smoking area of the air inlet.

The above purpose is realized by the following technical scheme:

a range hood comprises a range hood main body, the range hood main body is provided with an air inlet, and further comprises a first oil screen, a second oil screen, a driving device and a panel assembly, wherein the first oil screen and the second oil screen are arranged at the air inlet, one end of the first oil screen is hinged on the cigarette machine main body, the other end of the first oil screen is hinged with one end of the second oil screen, the other end of the second oil screen is hinged on the middle part of the panel component, the upper end of the panel component is connected with the cigarette machine main body in a sliding way, the output end of the driving device is connected with the first oil net to drive the first oil net to do overturning motion, the second oil net is driven to do turning motion by the action of the first oil net, and finally the panel component is driven to be unfolded outwards, the air inlet is enlarged or reduced through the combined action of the first oil screen, the second oil screen and the panel assembly.

In some embodiments, the panel assembly comprises a movable panel, a fixed shell and a sliding mechanism, wherein the movable panel is movably arranged on the cigarette machine main body through the sliding mechanism arranged on the cigarette machine main body and can be movably unfolded along the horizontal direction, the fixed shell is arranged on the back of the movable panel and is positioned above the smoke inlet, the movable end of the sliding mechanism is connected with the fixed shell, and the middle part of the movable panel is connected with the second oil screen.

In some embodiments, the sliding mechanism includes a first guide rail and a second guide rail, wherein the first guide rail and the second guide rail are disposed on two sides of the cigarette machine body, respectively, and two sides of the stationary case are connected with the first guide rail and the second guide rail, respectively.

In some embodiments, the fixed shell has first bounding wall, second bounding wall and third bounding wall that connects gradually, wherein first bounding wall sets up the left side position department of activity panel, the second bounding wall sets up the upper end position department of activity panel, the third bounding wall sets up the right side position department of activity panel, through the cooperation action jointly of first bounding wall, second bounding wall and third bounding wall is in order to prevent that outside oil smoke from passing through activity panel directly gets into in the cigarette machine main part.

In some embodiments, the panel assembly further comprises a mounting bracket disposed at a back location of the movable panel, the movable panel being hingedly connected to the second oil screen through the mounting bracket.

In some embodiments, the cigarette making machine further comprises a rotating shaft, wherein the rotating shaft is arranged on the cigarette making machine body and is rotatably connected with one end of the first oil net bottom, and the other end of the first oil net bottom is connected with the output end of the driving device.

In some embodiments, the range hood further comprises a fan assembly and an oil guide member, wherein the range hood body has a box body, the fan assembly is arranged in the box body, and the oil guide member is arranged at a position below the fan assembly to guide grease on the oil guide member.

In some embodiments, it has the installation department and leads the oil level to lead oily component, wherein the installation department sets up lead on the oil level, it passes through to lead the oil level the installation department is installed just will lead grease on the oil level toward the both sides of box lead the protruding anti-overflow face that is equipped with upwards of front position department of leading the oil level the rear end position department of leading the oil level upwards extends to be provided with the air guide surface that the cross section is circular-arc so as to guide the air current of flowing through.

In some embodiments, the cigarette machine further comprises a flow guiding member, the cigarette machine main body further comprises a smoke collecting hood, the flow guiding member is arranged at a communication position between the smoke collecting hood and the box body and is positioned at a position below the oil guiding member, the flow guiding member comprises a flow guiding part and a blocking part, the flow guiding part and the blocking part are arranged at intervals to define a groove together, the groove is suitable for collecting and guiding the grease guided out by the oil guiding member, and the cross section of the flow guiding part is arc-shaped so as to guide the airflow passing through.

In some embodiments, a cup is also included, the cup being disposed at a bottom location of the body of the cigarette machine for collecting grease within the body of the cigarette machine.

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

1. the range hood has simple structure, can make the negative pressure area of the air inlet of the range hood move downwards further, and simultaneously further enlarges the smoking area of the air inlet.

2. Its reasonable in design can effectively realize that the smoking is more smooth and easy to reach the less effect of noise.

Drawings

Fig. 1 is a schematic structural diagram of a range hood in an embodiment of the invention;

FIG. 2 is a cross-sectional view of a reduced inlet for a range hood in accordance with an embodiment of the present invention;

FIG. 3 is a cross-sectional view of an expanded inlet of the range hood in an embodiment of the present invention;

FIG. 4 is a first structural schematic diagram of a range hood according to an embodiment of the present invention;

fig. 5 is a second structural schematic diagram of a part of the structure of the range hood in the embodiment of the invention;

FIG. 6 is a schematic structural view of an oil guide member according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a flow guide member in an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of the claims of the present invention.

As shown in fig. 1 to 7, the present embodiment provides a range hood, which includes a range hood main body 1, the range hood main body 1 has an air inlet 11, and further includes a first oil screen 2, a second oil screen 3, a driving device 4 and a panel assembly 5, wherein the first oil screen 2 and the second oil screen 3 are arranged at the position of the air inlet 11, one end of the first oil screen 2 is hinged on the cigarette machine main body 1, the other end is hinged with one end of the second oil screen 3, the other end of the second oil screen 3 is hinged on the middle part of the panel component 5, the upper end of the panel component 5 is connected with the cigarette machine main body 1 in a sliding way, the output end of the driving device 4 is connected with the first oil screen 2 to drive the first oil screen 2 to turn, the second oil screen 3 is driven to do the turning motion by the action of the first oil screen 2, and finally the panel component 5 is driven to be unfolded outwards, the air inlet 11 is enlarged or reduced through the combined action of the first oil screen 2, the second oil screen 3 and the panel assembly 5.

In this embodiment, the panel assembly 5 is driven to move back and forth along the horizontal direction of the range hood main body 1 by the rotation of the first oil screen 2 and the second oil screen 3, the air inlet 11 is enlarged or reduced by the combined action of the first oil screen 2, the second oil screen 3 and the panel assembly 5, so that the range hood realizes the direct-suction range hood function in the top range hood form and the range hood function in the side range hood form in which the air inlet 11 sucks and exhausts oil smoke, and the range hood combines the oil smoke sucking and exhausting functions of the range hoods in the two forms, further the air inlet 11 of the range hood moves down and further enlarges the area of the smoke inlet, so that the range hood realizes a lower negative pressure area of the smoke inlet and a larger area of the negative pressure area of the smoke inlet, and in addition, when the air inlet 11 is reduced to enter a shutdown state after cooking, the range hood also realizes a smaller space occupation area of the range hood, so make the kitchen more pleasing to the eye, clean and tidy, its simple structure can make the negative pressure zone of range hood air intake 11 move down further, still further enlarge the smoking area of air intake 11 simultaneously.

Further, the panel assembly 5 comprises a movable panel 51, a fixed shell 52 and a sliding mechanism 53, wherein the movable panel 51 is movably arranged on the cigarette machine main body 1 through the sliding mechanism 53 arranged on the cigarette machine main body 1 and can be movably unfolded along the horizontal direction, the fixed shell 52 is arranged on the back of the movable panel 51 and is positioned above the smoke inlet 11, the movable end of the sliding mechanism 53 is connected with the fixed shell 52, the middle part of the movable panel 51 is connected with the second oil screen 3, the structure is simple, the design is reasonable, and the movable panel 51 can move back and forth along the horizontal direction of the cigarette machine main body 1 through the sliding mechanism 53 under the rotating action of the first oil screen 2 and the second oil screen 3.

Preferably, the sliding mechanism 53 comprises a first guide rail 531 and a second guide rail 532, wherein the first guide rail 531 and the second guide rail 532 are respectively arranged at two sides of the cigarette machine main body 1, two sides of the fixed shell 52 are respectively connected with the first guide rail 531 and the second guide rail 532, the design is reasonable, the cigarette machine main body 1 and the movable panel 51 can be connected together in a sliding manner, and meanwhile, the telescopic movement of the movable panel 51 is limited.

Specifically, the fixed shell 52 has a first enclosing plate 521, a second enclosing plate 522 and a third enclosing plate 523 which are connected in sequence, wherein the first enclosing plate 521 is arranged at the left side position of the movable panel 51, the second enclosing plate 522 is arranged at the upper end position of the movable panel 51, the third enclosing plate 523 is arranged at the right side position of the movable panel 51, and the first enclosing plate 521, the second enclosing plate 522 and the third enclosing plate 523 cooperate together to prevent external lampblack from directly entering the cigarette machine main body 1 through the movable panel 51.

In this embodiment, the front panel is disposed at an interval below the movable panel 51, so that the air inlet 11 of the range hood is formed between the front panel and the movable panel 51, when the air inlet 11 is narrowed, the range hood can further guide external oil smoke into the range hood main body 1, so that the range hood uses a low gear to deal with a scene with less oil smoke during cooking, that is, the range hood can further use a low gear wind speed to continue to exhaust the oil smoke according to the current state of the air inlet 11, if the smoking capability of the range hood needs to be increased, the actions of the first oil screen 2, the second oil screen 3 and the movable panel 51 can be controlled to enlarge the air inlet 11, so that the range hood uses a high gear to deal with a scene with more oil smoke during cooking, that the range hood can also use a high gear wind speed to continue to exhaust the oil smoke according to the enlarged state of the air inlet 11, so that the negative pressure region of, meanwhile, the smoking area of the air inlet 11 is further enlarged, and the smoking capability of the range hood is further improved greatly. In this embodiment, the first guide track 531 comprises two first inner guide tracks and two first outer guide tracks, wherein the first inner guide track is mounted on the inner wall of the cigarette machine body 1, the first outer guide track is mounted on the outer wall of the first enclosing plate 521, the first inner guide track cooperates with the first outer guide track to slidably connect the first enclosing plate 521 with the cigarette machine body 1, similarly, the second guide track 532 comprises two second inner guide tracks and two second outer guide tracks, wherein the second inner guide track is mounted on the inner wall of the cigarette machine body 1, the second outer guide track is mounted on the outer wall of the third enclosing plate 523, the second inner guide track cooperates with the second outer guide track to slidably connect the third enclosing plate 523 with the cigarette machine body 1, so that the fixed shell 52 moves back and forth along the horizontal direction of the cigarette machine body 1 along with the movable panel 51, thereby effectively preventing external oil smoke from directly entering the cigarette machine body 1 through the movable panel 51, thereby preventing the air in the cigarette machine body 1 from flowing out through the movable panel 51. In addition, along with the movable panel 51 is opened forwards, the included angle between the first oil screen 2 and the second oil screen 3 is turned over and expanded to 168 degrees from the original included angle of 103 degrees, so the area of the air inlet 11 of the range hood is further expanded, the area of the air inlet 11 increased after the air inlet 11 is expanded is 2.5 times of the area when the air inlet 11 is reduced, and due to the change of the angle when the first oil screen 2 and the second oil screen 3 are expanded, the air inlet 11 of the range hood moves downwards and expands, so that the air inlet 11 is closer to an oil smoke source during cooking.

Further, panel components 5 still includes installing support 54, and installing support 54 sets up in the back position department of activity panel 51, and activity panel 51 is connected with second oil net 3 is articulated through installing support 54, and its simple structure is convenient for install, can effectively improve the fastness of installation between panel components 5 and the second oil net 3.

Specifically, still include the pivot, the pivot setting is in cigarette machine main part 1 and rotationally is connected with the one end of first oil net 2 bottom, and the other end and the output of drive arrangement 4 of first oil net 2 bottom are connected, and its reasonable in design can effectively guarantee the synchronism of first oil net 2 upset motion.

In this embodiment, the mounting bracket 54 is attached to the back of the movable panel 51, one side of the bottom end of the mounting bracket 54 is hinged to the second oil net 3 at the end far away from the first oil net 2 through a rotating shaft, and the other end of the first oil net 2 is connected to the second oil net 3, so that the smoothness of movement among the first oil net 2, the second oil net 3 and the movable panel 51 is effectively ensured.

Further, still include fan subassembly 6 and lead oily component 7, wherein the cigarette machine main part 1 has box 12, and fan subassembly 6 sets up in box 12 inside, leads oily component 7 and sets up in the below position of fan subassembly 6 and in order to lead the water conservancy diversion to the grease on leading oily component 7, and its reasonable in design can do benefit to and lead water conservancy diversion and collection to the grease on leading oily component 7.

Preferably, the oil guiding member 7 has a mounting portion 71 and an oil guiding surface 72, wherein the mounting portion 71 is disposed on the oil guiding surface 72, the oil guiding surface 72 is mounted in the box body 12 through the mounting portion 71 and guides the grease on the oil guiding surface 72 to two sides of the box body 12, an overflow preventing surface 73 is convexly disposed at the front end position of the oil guiding surface 72, and an air guiding surface 74 with an arc-shaped cross section is upwardly extended at the rear end position of the oil guiding surface 72 to guide the flowing air flow.

Specifically, still include the water conservancy diversion component 8, cigarette machine main part 1 still has collection petticoat pipe 13, water conservancy diversion component 8 sets up the intercommunication department between collection petticoat pipe 13 and box 12 and is located the lower position department of leading oily component 7, water conservancy diversion component 8 has water conservancy diversion portion 81 and blocking part 82, wherein water conservancy diversion portion 81 and blocking part 82 set up in order to inject the recess jointly each other at an interval, the recess is suitable for collecting and water conservancy diversion the grease that leads out that oily component 7 led out, the cross-section of water conservancy diversion portion 81 is circular-arc in order to guide the air current of flowing through, its reasonable in design can effectively discharge the grease that collects to the outside, and can also guide the air current of flowing through.

Particularly, the range hood further comprises an oil cup 9, the oil cup 9 is arranged at the bottom of the range hood main body 1 and used for collecting the grease in the range hood main body 1, the structure is simple, and the collection of the grease in the range hood main body 1 can be facilitated.

In this embodiment, the cigarette machine main body 1 has a box 12 and a smoke collecting hood 13 disposed below the box 12, the box 12 and the smoke collecting hood 13 are communicated with each other to make external oil smoke enter the smoke collecting hood 13 through the air inlet 11 in sequence, the oil smoke entering the smoke collecting hood 13 flows through the box 12 and the fan assembly 6 in sequence and then is discharged to the external flue, the oil guiding surface 72 has a first guiding surface, and a second guiding surface and a third guiding surface disposed at two sides of the first guiding surface respectively, the guiding surfaces are located at positions right below the fan assembly 6 to effectively collect oil and grease splashed out when the fan assembly 6 rotates, the second guiding surface and the third guiding surface are disposed from front to back and inclined downwards, the inclined angle of the second guiding surface and the third guiding surface is preferably 4 ° to 15 °, but not limited to the above angle values, and an appropriate angle value can be designed according to actual requirements, so that the oil and grease collected by the first guiding surface and the oil absorbed by the bottom surface thereof are guided backwards, the greasy dirt is respectively followed the second water conservancy diversion face again, third water conservancy diversion face is toward controlling both ends and flowing, thereby prevent that the direct drippage of grease from advancing the pan, and then accomplish and collect and the water conservancy diversion fan assembly 6 produced greasy dirt of work, in addition, the greasy dirt that first water conservancy diversion face self diapire adsorbed also is along the angle of setting up back water conservancy diversion again respectively through the second water conservancy diversion face, third water conservancy diversion face is toward left and right both ends flow, and the cross section of air guide face 74 is personally submitted the semicircle arcuation, when effective water conservancy diversion grease, still can lead to below air inlet current, thereby make the air inlet more smooth and easy, more be favorable to the promotion of oil absorption effect and reduce the noise that the air current produced, and then reach the effect of wind-guiding and making an. The outer wall of the diversion part 81 is arranged from front to back and is inclined downwards, the inclination angle of the diversion part 81 is 4-8 degrees, but not limited to the angle value, and a proper angle value can be designed according to actual requirements, the blocking part 82 is provided with a blocking structure with three sides of left, front and right connected in sequence, the rear end of the blocking part is in an open shape and is arranged corresponding to the inner side wall of the rear end of the fume collecting hood 13 so as to guide the collected grease backwards, in addition, the diversion part 81 is sequentially connected with four sides of front, left, back and right, so that a groove is defined between the diversion part 81 and the blocking part 82, the cross section of the diversion part 81 is in a semicircular shape, so that the groove above the diversion part can effectively guide the grease, the bottom surface of the diversion part 81 can guide the inlet airflow of the fume collecting hood 13, thereby ensuring smooth inlet air, being more beneficial to the improvement of the oil absorption effect and the reduction of the noise, the air flow generated in the smoke discharging process has smaller vibration to achieve large suction force, and because the flow guide member 8 is positioned at the lower position of the oil guide member 7, the grease discharged through the second flow guide surface and the third flow guide surface enters the groove of the flow guide member 8 under the action of gravity, and then the collected grease is guided downwards from front to back so that the grease flows into the oil cup 9 through the inner wall at the rear end of the smoke collecting hood 13.

In this embodiment, the driving device 4 is preferably a driving motor, but is not limited to a driving motor, and other more suitable driving structures may be selected according to actual requirements. As shown in fig. 3, when the driving motor rotates counterclockwise, the first oil screen 2 is driven by the action of the driving motor, the second oil screen 3 rotates counterclockwise under the action of the driving force and pushes the first oil screen 2, the first oil screen 2 moves outward and rotates clockwise, and simultaneously pushes the movable panel 51 to translate forward, and the movable panel 51 moves forward under the constraint of the guide rails on the left and right sides by the fixed shell 52, so that the movable panel 51 extends and moves horizontally outward under the thrust of the first oil screen 2 and the second oil screen 3, thereby completing the horizontal movement expansion action of the movable panel 51. As shown in fig. 2, the range hood drives the first oil screen 2 to rotate clockwise through the driving device 4 so as to generate opposite driving force for the second oil screen 3, so that the movable panel 51 retracts inwards to move, and then the horizontal movement closing action of the movable panel 51 is completed.

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 invention.

Claims

1. A range hood comprises a range hood main body (1), wherein the range hood main body (1) is provided with an air inlet (11), and the range hood is characterized by further comprising a first oil screen (2), a second oil screen (3), a driving device (4) and a panel assembly (5), wherein the first oil screen (2) and the second oil screen (3) are arranged at the position of the air inlet (11), one end of the first oil screen (2) is hinged to the range hood main body (1), the other end of the first oil screen is hinged to one end of the second oil screen (3), the other end of the second oil screen (3) is hinged to the middle of the panel assembly (5), the upper end of the panel assembly (5) is in sliding connection with the range hood main body (1), the output end of the driving device (4) is connected with the first oil screen (2) to drive the first oil screen (2) to turn over, the second oil net (3) is driven to do turnover movement through the action of the first oil net (2), the panel assembly (5) is driven to expand outwards finally, and the air inlet (11) is enlarged or reduced through the combined action of the first oil net (2), the second oil net (3) and the panel assembly (5).

2. The range hood according to claim 1, wherein the panel assembly (5) comprises a movable panel (51), a fixed shell (52) and a sliding mechanism (53), wherein the movable panel (51) is movably arranged on the range hood body (1) through the sliding mechanism (53) arranged on the range hood body (1) and can be movably unfolded along a horizontal direction, the fixed shell (52) is arranged on the back of the movable panel (51) and is positioned above the smoke inlet (11), the movable end of the sliding mechanism (53) is connected with the fixed shell (52), and the middle of the movable panel (51) is connected with the second oil screen (3).

3. The range hood according to claim 2, wherein the sliding mechanism (53) comprises a first guide rail (531) and a second guide rail (532), wherein the first guide rail (531) and the second guide rail (532) are respectively arranged at two sides of the range hood body (1), and two sides of the fixed shell (52) are respectively connected with the first guide rail (531) and the second guide rail (532).

4. The range hood according to claim 2, wherein the fixed shell (52) has a first enclosing plate (521), a second enclosing plate (522) and a third enclosing plate (523) which are connected in sequence, wherein the first enclosing plate (521) is arranged at the left side position of the movable panel (51), the second enclosing plate (522) is arranged at the upper end position of the movable panel (51), the third enclosing plate (523) is arranged at the right side position of the movable panel (51), and external oil smoke is prevented from directly entering the interior of the range hood main body (1) through the cooperation action of the first enclosing plate (521), the second enclosing plate (522) and the third enclosing plate (523).

5. A range hood according to claim 1, wherein the panel assembly (5) further comprises a mounting bracket (54), the mounting bracket (54) is arranged at a back position of the movable panel (51), and the movable panel (51) is hinged with the second oil screen (3) through the mounting bracket (54).

6. The range hood according to claim 1, further comprising a rotating shaft, wherein the rotating shaft is arranged on the range hood body (1) and rotatably connected with one end of the bottom of the first oil screen (2), and the other end of the bottom of the first oil screen (2) is connected with the output end of the driving device (4).

7. The range hood according to claim 1, further comprising a fan assembly (6) and an oil guiding member (7), wherein the range hood body (1) has a box body (12), the fan assembly (6) is disposed in the box body (12), and the oil guiding member (7) is disposed at a lower position of the fan assembly (6) to guide the grease on the oil guiding member (7).

8. The range hood according to claim 7, wherein the oil guide member (7) has an installation part (71) and an oil guide surface (72), wherein the installation part (71) is arranged on the oil guide surface (72), the oil guide surface (72) is installed through the installation part (71) in the box body (12) and guides grease on the oil guide surface (72) to two sides of the box body (12), an anti-overflow surface (73) is convexly arranged at the front end position of the oil guide surface (72), and the rear end position of the oil guide surface (72) upwards extends to form an air guide surface (74) with a cross section in a circular arc shape so as to guide the air flow passing through.

9. A range hood according to claim 7, further comprising a flow guide member (8), wherein the range hood body (1) further comprises a smoke collecting hood (13), the flow guide member (8) is arranged at the communication position between the smoke collecting hood (13) and the box body (12) and is positioned at the lower position of the oil guide member (7), the flow guide member (8) is provided with a flow guide part (81) and a blocking part (82), wherein the flow guide part (81) and the blocking part (82) are arranged at intervals to jointly define a groove, the groove is suitable for collecting and guiding the grease guided out by the oil guide member (7), and the cross section of the flow guide part (81) is arc-shaped to guide the airflow passing through.

10. A range hood according to any one of claims 1 to 9, further comprising an oil cup (9), said oil cup (9) being disposed at a bottom position of said range hood body (1) for collecting grease within the range hood body (1).