CN114576667A - Smoke exhaust ventilator - Google Patents

Abstract

The invention discloses a range hood, which comprises a range hood main body and a smoke collecting assembly, wherein the range hood main body comprises a smoke collecting hood, at least one driving mechanism and a turning plate, an air inlet is formed in the front side of the smoke collecting hood, the driving mechanism is arranged at the upper end in the smoke collecting hood, part of the driving mechanism can extend out of the smoke collecting hood through the air inlet, the turning plate is arranged on the driving mechanism, the smoke collecting assembly comprises a first mounting frame, a second mounting frame, a first smoke collecting plate and a second smoke collecting plate, the upper end of the first mounting frame is arranged at the upper end part of the left front part in the smoke collecting hood, the upper end of the second mounting frame is arranged at the upper end part of the right front part in the smoke collecting hood, the upper end of the first smoke collecting plate is rotatably arranged on the first mounting frame, the upper end of the second smoke collecting plate is rotatably arranged on the second mounting frame, when the turning plate is turned outwards, the first smoke collecting plate and the second smoke collecting plate swing outwards through the air inlet, the turning plate, the first cigarette holding plate and the second cigarette holding plate jointly form a U-shaped negative pressure area extending outwards.

Description

Smoke exhaust ventilator

Technical Field

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

Background

The existing range hood mainly comprises two categories of top suction and side suction according to appearance forms. The hanging machine of the top smoking machine is higher in height and has larger operation space. However, the distance between the air inlet of the range hood and the cooker is large, so that the phenomenon of oil smoke overflow is easily caused at the instant of frying. The existing top smoke suction machine improves the smoke control capability and reduces the overflow of oil smoke by means of a deep cavity, a smoke collecting plate, an air curtain, a butterfly wing plate and the like.

To having the whole overall dimension of part side smoking machine to match with the cupboard on the market at present, especially cigarette machine thickness does not stand out the cupboard front side, prevent that the cigarette machine front side from bumping the head, but cigarette machine thickness can influence the holistic smoking effect of cigarette machine, in order to compensate the cigarette machine that thickness is little, can increase panel turnover mechanism in the cigarette machine front side generally, open the back when the opening-closing plate, negative pressure zone expands forward and the reinforcing holds together the cigarette effect, and in order to strengthen the smoking effect of cigarette machine, the cigarette machine height reduces the distance that makes the air intake reduce and top of a kitchen range face between, in the oil smoke gets into the lampblack absorber before diffusing all around. However, the height of the cigarette machine hanging machine is too low, so that the cooking space of a user is small, the cooking operation of the user is inconvenient, and the use experience of the user is poor.

Disclosure of Invention

The invention aims to provide a method, which has the advantages that: under the condition that the height of the range hood is not reduced, the negative pressure area is outwards extended by the fact that the turning plate, the first smoke collecting plate and the second smoke collecting plate jointly form a U shape, and therefore oil smoke suction efficiency is improved.

The invention relates to a range hood, which comprises a range hood main body and a smoke collecting assembly, wherein the range hood main body comprises a smoke collecting hood, at least one driving mechanism and a turning plate, an air inlet is formed in the front side of the smoke collecting hood, the driving mechanism is installed at the upper end in the smoke collecting hood, part of the driving mechanism can extend out of the smoke collecting hood through the air inlet, the turning plate is installed on the driving mechanism to open or close the air inlet in a turning manner, the smoke collecting assembly comprises a first installation frame, a second installation frame, a first smoke collecting plate and a second smoke collecting plate, the upper end of the first installation frame is installed at the upper end part of the left front part in the smoke collecting hood, the upper end of the second installation frame is installed at the upper end part of the right front part in the smoke collecting hood, the upper end of the first smoke collecting plate is rotatably installed on the first installation frame, the upper end of the second smoke collecting plate is rotatably installed on the second installation frame, and when the turning plate moves towards the opening direction of the air inlet, the first smoke collecting plate and the second smoke collecting plate swing outwards through the air inlet, the turning plate, the first smoke collecting plate and the second smoke collecting plate jointly enclose a U-shaped outwards-extending negative pressure area, and when the turning plate moves towards the direction of closing the air inlet, the turning plate pushes the first smoke collecting plate and the second smoke collecting plate to swing into the smoke collecting hood.

Preferably or optionally, hold together the cigarette subassembly and still include the third and hold together cigarette board and fourth and hold together the cigarette board, the third holds together the cigarette board and installs in turning over the inboard left end portion of board, and the third holds together the cigarette board parallel with first holding together the cigarette board, the fourth holds together the cigarette board and installs in turning over the inboard right-hand member portion of board, and the fourth holds together the cigarette board parallel with the second and holds together the cigarette board, turn over the board when turning over outwards and open and targetting in place, the third holds together the back side of cigarette board and the first front side overlap joint that holds together the cigarette board, the back side that holds together the cigarette board and the second front side overlap joint that holds together the cigarette board of fourth, turn over the board enstrophe and close when targetting in place, first holds together the cigarette board, the cigarette board is held together to the second, the third holds together the cigarette board and the fourth and holds together the cigarette board and all be located collection petticoat pipe.

Preferably or optionally, the lower extreme of first mounting bracket is provided with the first spacing portion that extends to second mounting bracket direction level, and the lower extreme of second mounting bracket is provided with the spacing portion of second that extends to first mounting bracket direction level, and when first cigarette board and the second of holding together put in place outward the cigarette board, first cigarette board and the first spacing portion butt of holding together, the second holds together cigarette board and the spacing portion butt of second.

Preferably or optionally, the first recess that extends to back side direction is seted up on the upper portion of the first front side of holding together the cigarette board, and the second recess that extends to back side direction is seted up on the upper portion of the front side of second holding together the cigarette board, and when first holding together cigarette board and second held together the cigarette board and outwards moved, first spacing portion was located first recess, and the spacing portion of second was located the second recess.

Preferably or optionally, the first cigarette holding plate, the second cigarette holding plate, the third cigarette holding plate and the fourth cigarette holding plate are all fan-shaped.

Preferably or optionally, the area of the third cigarette collecting plate is larger than that of the first cigarette collecting plate, and the area of the fourth cigarette collecting plate is larger than that of the second cigarette collecting plate.

Preferably or optionally, still include at least one first rubber spare and at least one second rubber spare, the third is held together the cigarette board and is located the first outside of holding together the cigarette board, the fourth is held together the cigarette board and is located the second and holds together the outside of cigarette board, first rubber spare is installed and is held together on cigarette board or the third and be located the first cigarette board and hold together between the cigarette board with the third, the second rubber spare is installed and is held together on cigarette board or the fourth and be located the second and hold together between the cigarette board with the fourth in the second.

Preferably or optionally, the cigarette holder further comprises two third rubber pieces, and the two third rubber pieces are respectively installed at the front side edges of the first cigarette holding plate and the second cigarette holding plate.

Preferably or optionally, the driving mechanism comprises a mounting plate, a speed reduction motor and a connecting rod assembly, the mounting plate is mounted at the upper end in the smoke collecting hood, the speed reduction motor is mounted on the mounting plate, one end of the connecting rod assembly is fixedly connected with a rotating shaft of the speed reduction motor, and the inner side surface of the turning plate is fixedly connected with the other end of the connecting rod assembly.

Preferably or optionally, the connecting rod assembly comprises a driving connecting rod, a first driven connecting rod, a second driven connecting rod, a third driven connecting rod and a fourth driven connecting rod, one end of the driving connecting rod is fixedly connected to a rotating shaft of the speed reducing motor, one end of the first driven connecting rod is hinged to the mounting plate and located in front of the rotating shaft of the speed reducing motor, one end of the second driven connecting rod is hinged to the other end of the driving connecting rod, the middle of the second driven connecting rod is hinged to the middle of the first driven connecting rod, one end of the third driven connecting rod is hinged to the other end of the first driven connecting rod, one end of the fourth driven connecting rod is hinged to the other end of the second driven connecting rod, the middle of the fourth driven connecting rod is hinged to the other end of the third driven connecting rod, and the inner side face of the turning plate is fixedly connected to the fourth driven connecting rod.

Preferably or optionally, the number of the driving mechanisms is two, and the two driving mechanisms are respectively installed at the left and right end parts in the smoke collecting hood.

Compared with the prior art, the range hood of the invention has the advantages that: when the turning plate is in a closed position, the front side edges of the first cigarette holding plate and the second cigarette holding plate are both abutted against the inner side surface of the turning plate; when turning over the board and moving to opening the air intake direction, first hold together cigarette board and second and pass the air intake and outwards swing through the gravity of self, turn over the board, first hold together cigarette board and second and hold together the cigarette board and enclose into the outside extension negative pressure region of U-shaped, at this moment, the first cigarette board and the second of holding together of collection petticoat pipe both sides hold together the cigarette board and have the effect of holding together the cigarette, prevent that the oil smoke from escaping to both sides to oil absorption cigarette efficiency has been promoted. When turning over the board and moving to closing air intake direction, turn over the board and promote first cigarette board and the second of holding together and hold together in the cigarette board swings to album petticoat pipe to hide holding together cigarette subassembly, thereby realized the neat and artistic effect of outward appearance.

Drawings

Fig. 1 is a schematic diagram of a turning plate opening state of a range hood.

Fig. 2 is a schematic diagram of a turning-plate closing state of the range hood of the present invention.

Fig. 3 is a schematic disassembly diagram of the range hood of the present invention.

Fig. 4 is a schematic diagram of a left side flap of the range hood of the present invention in a closed state.

Fig. 5 is a schematic diagram of a closed state of a right turning plate of the range hood.

Fig. 6 is a schematic diagram of the opening process of the right turning plate of the range hood.

Fig. 7 is a schematic diagram of the range hood after the right flap is opened.

Fig. 8 is a schematic perspective view of a smoke collection assembly of a range hood according to the present invention.

Fig. 9 is a schematic view of a right driving mechanism of a range hood according to the present invention.

Fig. 10 is a schematic perspective view of a driving mechanism of a range hood according to the present invention.

Description of the figures

1. A range hood main body; 11. a smoke collecting hood; 12. a drive mechanism; 121. mounting a plate; 122. a reduction motor; 123. a connecting rod assembly; 1231. a driving connecting rod; 1232. a first driven link; 1233. a second driven link; 1234. a third driven link; 1235. a fourth driven link; 13. turning over a plate;

2. a cigarette gathering component; 21. a first mounting bracket; 211. a first limiting part; 22. a second mounting bracket; 221. a second limiting part; 23. a first cigarette collecting plate; 231. a first groove; 24. a second cigarette collecting plate; 241. a second groove; 25. a third cigarette collecting plate; 26. a fourth cigarette collecting plate;

3. a first rubber member;

4. a second rubber member;

5. and a third rubber member.

Detailed Description

A range hood according to the present invention will be described in further detail with reference to fig. 1 to 10 of the drawings.

Referring to fig. 1 to 10, the range hood of the present invention includes a range hood main body 1 and a smoke collection assembly 2.

The range hood main body 1 comprises a fume collecting hood 11, a fan box arranged on the upper portion of the fume collecting hood 11, at least one driving mechanism 12 and a turning plate 13, wherein an air inlet is formed in the front side of the fume collecting hood 11, the driving mechanism 12 is installed at the upper end in the fume collecting hood 11, part of the driving mechanism 12 can extend out of the fume collecting hood 11 through the air inlet, and the turning plate 13 is installed on the driving mechanism 12 so as to turn over to open or close the air inlet.

When the driving mechanism 12 is one, the driving mechanism 12 is provided at the middle of the upper end inside the hood 11. As shown in fig. 3, 6, 7 and 9, when there are two drive mechanisms 12, the two drive mechanisms 12 are respectively mounted at both right and left end portions inside the smoke collecting hood 11.

Of course, the number of driving mechanisms 12 is not limited to the above-described embodiments, and those skilled in the art can select the number of driving mechanisms 12 according to actual needs.

The cigarette gathering assembly 2 comprises a first mounting frame 21, a second mounting frame 22, a first cigarette gathering plate 23 and a second cigarette gathering plate 24.

The upper end of the first mounting bracket 21 is mounted at the upper end of the left front portion within the hood 11, and the upper end of the second mounting bracket 22 is mounted at the upper end of the right front portion within the hood 11.

The upper end of the first cigarette collecting plate 23 is rotatably mounted on the first mounting frame 21, and the upper end of the second cigarette collecting plate 24 is rotatably mounted on the second mounting frame 22. For example, a horizontally extending pin is disposed on each of the first mounting frame 21 and the second mounting frame 22 to mount the first cigarette holding plate 23 and the second cigarette holding plate 24.

When the turning plate 13 is in the closed position, the front sides of the first cigarette holding plate 23 and the second cigarette holding plate 24 are both abutted against the inner side surface of the turning plate 13.

When the turning plate 13 moves towards the direction of opening the air inlet, the first cigarette holding plate 23 and the second cigarette holding plate 24 pass through the air inlet by the self gravity and swing outwards.

Turning over board 13, first cigarette board 23 and the second of holding together hold together cigarette board 24 and enclose into the outside extension negative pressure zone of U-shaped jointly, at this moment, the first cigarette board 23 and the second of holding together of collection petticoat pipe 11 both sides hold together cigarette board 24 and have the effect of holding together the cigarette, prevent that the oil smoke from escaping to both sides to oil absorption cigarette efficiency has been promoted.

When turning over board 13 and moving to closing air intake direction, turn over board 13 and promote first cigarette board 23 and the second and hold together cigarette board 24 and swing to in the collection petticoat pipe 11 to holding together cigarette subassembly 2 and hiding, thereby realized the neat and artistic effect of outward appearance.

Referring to fig. 1 to 10, the range hood of the present invention may further include: the cigarette gathering assembly 2 further comprises a third cigarette gathering plate 25 and a fourth cigarette gathering plate 26.

The third cigarette collecting plate 25 is installed at the left end part of the inner side of the turning plate 13, and the third cigarette collecting plate 25 is parallel to the first cigarette collecting plate 23.

A fourth cigarette holding plate 26 is mounted at the right end portion inside the flap 13, and the fourth cigarette holding plate 26 is parallel to the second cigarette holding plate 24.

When the turning plate 13 is turned outwards and opened to a proper position, the rear side edge of the third cigarette holding plate 25 is in lap joint with the front side edge of the first cigarette holding plate 23, and the rear side edge of the fourth cigarette holding plate 26 is in lap joint with the front side edge of the second cigarette holding plate 24, so that the negative pressure area is further extended outwards, and the oil smoke suction efficiency is further improved.

When turning over 13 enstrophe and closing in place, first hold together cigarette board 23, second hold together cigarette board 24, third hold together cigarette board 25 and fourth hold together cigarette board 26 and all be located collection petticoat pipe 11 to hide holding together cigarette subassembly 2, thereby realized the neat and artistic effect of outward appearance.

Referring to fig. 8, the range hood of the present invention may further include, on the basis of the foregoing technical solution: the lower end of the first mounting bracket 21 is provided with a first stopper 211 horizontally extending toward the second mounting bracket 22.

The second mounting bracket 22 has a second stopper 221 at a lower end thereof, which horizontally extends in the direction of the first mounting bracket 21.

When the first cigarette holding plate 23 and the second cigarette holding plate 24 are put in place, the first cigarette holding plate 23 abuts against the first limiting part 211, the second cigarette holding plate 24 abuts against the second limiting part 221, and at the moment, the first cigarette holding plate 23 and the second cigarette holding plate 24 are close to completely extending out the cigarette collecting cover 11. The arrangement of the first limiting part 211 and the second limiting part 221 prevents the first smoke gathering plate 23 and the second smoke gathering plate 24 from completely extending out of the smoke collecting hood 11, so that the effect of preventing the oil smoke from escaping from the gap between the rear side edge of the first smoke gathering plate 23 and the second smoke gathering plate 24 and the smoke collecting hood 11 is achieved.

Referring to fig. 8, the range hood of the present invention may further include, on the basis of the foregoing technical solution: the upper portion of the front side of the first cigarette holding plate 23 is provided with a first groove 231 extending towards the rear side, and the upper portion of the front side of the second cigarette holding plate 24 is provided with a second groove 241 extending towards the rear side.

When the first cigarette holding plate 23 and the second cigarette holding plate 24 move outwards, the first limiting portion 211 is located in the first groove 231, the second limiting portion 221 is located in the second groove 241, and when the first cigarette holding plate 23 and the second cigarette holding plate 24 move outwards in place, the rear end groove walls of the first groove 231 and the second groove 241 are respectively abutted to the first limiting portion 211 and the second limiting portion 221.

Referring to fig. 1 to 10, the range hood of the present invention may further include: the first cigarette holding plate 23, the second cigarette holding plate 24, the third cigarette holding plate 25 and the fourth cigarette holding plate 26 are all fan-shaped. Of course, the shapes of the first cigarette collecting plate 23, the second cigarette collecting plate 24, the third cigarette collecting plate 25 and the fourth cigarette collecting plate 26 are not limited to fan shapes, and those skilled in the art can select the shapes of the cigarette collecting plates according to actual needs.

Referring to fig. 1 to 10, the range hood of the present invention may further include: the area of the third cigarette holding plate 25 is larger than that of the first cigarette holding plate 23, and the area of the fourth cigarette holding plate 26 is larger than that of the second cigarette holding plate 24. Of course, the areas of the first cigarette collecting plate 23, the second cigarette collecting plate 24, the third cigarette collecting plate 25 and the fourth cigarette collecting plate 26 are not limited to the above embodiment, and those skilled in the art can select the area of each cigarette collecting plate according to actual needs.

Referring to fig. 8, the range hood of the present invention may further include, on the basis of the foregoing technical solution: the cigarette collecting device further comprises at least one first rubber part 3 and at least one second rubber part 4, the third cigarette collecting plate 25 is located on the outer side of the first cigarette collecting plate 23, and the fourth cigarette collecting plate 26 is located on the outer side of the second cigarette collecting plate 24.

The first rubber part 3 is installed on the first cigarette holding plate 23 or the third cigarette holding plate 25 and is positioned between the first cigarette holding plate 23 and the third cigarette holding plate 25, and the second rubber part 4 is installed on the second cigarette holding plate 24 or the fourth cigarette holding plate 26 and is positioned between the second cigarette holding plate 24 and the fourth cigarette holding plate 26.

The first rubber part 3 has the function of keeping the gap between the third cigarette holding plate 25 and the first cigarette holding plate 23 from interfering with each other, and the second rubber part 4 has the function of keeping the gap between the fourth cigarette holding plate 26 and the second cigarette holding plate 24 from interfering with each other, so that the effects of smooth and non-blocking in opening and closing movement are realized.

Preferably, two first rubber pieces 3 are arranged on the outer side surface of the first cigarette holding plate 23, and two second rubber pieces 4 are arranged on the outer side surface of the second cigarette holding plate 24.

Referring to fig. 8, the range hood of the present invention may further include, on the basis of the foregoing technical solution: still include two third rubber spare 5, two third rubber spare 5 install respectively in the first front side edge of holding together cigarette board 23 and second and holding together cigarette board 24, close and turn over 13 in-processes of board, the first third rubber spare 5 that holds together on cigarette board 23 and second and turn over 13 butts with turning over the board to noise reduction and the effect of reducing wear have been realized.

Referring to fig. 9 and 10, the range hood of the present invention may further include: the driving mechanism 12 includes a mounting plate 121, a reduction motor 122 and a link assembly 123, the mounting plate 121 is mounted at the upper end inside the smoke collecting hood 11, and the reduction motor 122 is mounted on the mounting plate 121. For example, the mounting plate 121 includes a top wall and side walls, the top wall is fixed inside the smoke collecting cover 11, the reduction motor 122 is fixed on inner wall surfaces of the top wall and the side walls, a rotating shaft of the reduction motor 122 rotatably penetrates through the side walls, and one end of the link assembly 123 is fixed on the rotating shaft of the reduction motor 122.

The inner side surface of the turning plate 13 is fixedly connected with the other end part of the connecting rod assembly 123, so that the effect of driving the turning plate 13 to perform turning motion is realized.

Referring to fig. 9 and 10, the range hood of the present invention may further include: the linkage assembly 123 includes a driving link 1231, a first driven link 1232, a second driven link 1233, a third driven link 1234, and a fourth driven link 1235.

One end rigid coupling of initiative connecting rod 1231 is in gear motor 122's pivot, the one end of first driven connecting rod 1232 articulates on mounting panel 121 and is located the front portion of gear motor 122's pivot, the one end of second driven connecting rod 1233 is articulated with the other end of initiative connecting rod 1231, the middle part of second driven connecting rod 1233 is articulated with the middle part of first driven connecting rod 1232, so that can drive first driven connecting rod 1232 rotatory when making initiative connecting rod 1231 rotatory, outside extension reach, thereby realize the negative pressure zone in extension wind chamber.

One end of the third driven connecting rod 1234 is hinged to the other end of the first driven connecting rod 1232, one end of the fourth driven connecting rod 1235 is hinged to the other end of the second driven connecting rod 1233, the middle of the fourth driven connecting rod 1235 is hinged to the other end of the third driven connecting rod 1234, and the inner side face of the turning plate 13 is fixedly connected with the fourth driven connecting rod 1235, so that the effect of large opening and closing angle overturning driving of the turning plate 13 is achieved.

Preferably, the lengths of the first and second driven links 1232 and 1233 are both greater than the length of the driving link 1231, and the driving link 1231 is connected to four driven links to form a multi-link mechanism.

Preferably, the driving link 1231, the first driven link 1232, the second driven link 1233, the third driven link 1234 and the fourth driven link 1235 are all movably hinged to each other by rivets.

Preferably, a connecting lug is arranged on the inner side surface of the turning plate 13, and the turning plate 13 is fixedly connected with the fourth driven connecting rod 1235 through the connecting lug.

The above description is only for illustrating some specific embodiments of the present invention, but not for the purpose of limiting the scope of the present invention, and all equivalent changes, modifications, or equivalent magnifications or reductions made in accordance with the design spirit of the present invention should be considered as falling within the scope of the present invention.

Claims (10)

1. A range hood, comprising:

range hood main part (1) including collection petticoat pipe (11), at least one actuating mechanism (12) and turning over board (13), the front side of collection petticoat pipe (11) is opened and is equipped with the air intake, actuating mechanism (12) install in just partial accessible in collection petticoat pipe (11) the air intake stretches out outside collection petticoat pipe (11), turn over board (13) install in actuating mechanism (12) are last, in order to open or to close the air intake to and turn over board (13) and install in

A cigarette gathering assembly (2) comprising a first mounting frame (21), a second mounting frame (22), a first cigarette gathering plate (23) and a second cigarette gathering plate (24), wherein the first mounting frame (21) is mounted at the left end part in the cigarette gathering hood (11), the second mounting frame (22) is mounted at the right end part in the cigarette gathering hood (11), the first cigarette gathering plate (23) is rotatably mounted on the first mounting frame (21), and the second cigarette gathering plate (24) is rotatably mounted on the second mounting frame (22); turn over board (13) to opening during the air intake direction motion, first hold together cigarette board (23) with second hold together cigarette board (24) and pass through the outside swing of air intake and with turn over board (13) and enclose into the outside extension negative pressure zone of U-shaped jointly, turn over board (13) to closing during the air intake direction motion, turn over board (13) and promote first hold together cigarette board (23) with second hold together cigarette board (24) swing extremely in collection petticoat pipe (11).

2. The range hood according to claim 1, wherein the smoke gathering assembly (2) further comprises a third smoke gathering plate (25) and a fourth smoke gathering plate (26), the third smoke gathering plate (25) is installed at the left end of the inner side of the turning plate (13), the third smoke gathering plate (25) is parallel to the first smoke gathering plate (23), the fourth smoke gathering plate (26) is installed at the right end of the inner side of the turning plate (13), the fourth smoke gathering plate (26) is parallel to the second smoke gathering plate (24), when the turning plate (13) is turned outwards and opened in place, the rear side of the third smoke gathering plate (25) is in lap joint with the front side of the first smoke gathering plate (23), the rear side of the fourth smoke gathering plate (26) is in lap joint with the front side of the second smoke gathering plate (24), and when the turning plate (13) is turned inwards and closed in place, the first smoke gathering plate (23) and the fourth smoke gathering plate (26) are in lap joint with the front side of the turning plate (13), and when the turning plate (13) is turned inwards turned and closed in place, the first smoke gathering plate (23) is closed in place, The second cigarette gathering plate (24), the third cigarette gathering plate (25) and the fourth cigarette gathering plate (26) are all located in the cigarette collecting hood (11).

3. The range hood according to claim 2, wherein a first limiting portion (211) horizontally extending towards the second mounting frame (22) is arranged at the lower end of the first mounting frame (21), a second limiting portion (221) horizontally extending towards the first mounting frame (21) is arranged at the lower end of the second mounting frame (22), when the first smoke collecting plate (23) and the second smoke collecting plate (24) are outwardly swung to a position, the first smoke collecting plate (23) is abutted against the first limiting portion (211), and the second smoke collecting plate (24) is abutted against the second limiting portion (221).

4. The range hood according to claim 3, wherein a first groove (231) extending in the direction of the rear side is formed in the upper portion of the front side of the first smoke collecting plate (23), a second groove (241) extending in the direction of the rear side is formed in the upper portion of the front side of the second smoke collecting plate (24), and when the first smoke collecting plate (23) and the second smoke collecting plate (24) move outward, the first limiting portion (211) is located in the first groove (231), and the second limiting portion (221) is located in the second groove (241).

5. The range hood according to claim 2, wherein the first smoke collecting plate (23), the second smoke collecting plate (24), the third smoke collecting plate (25) and the fourth smoke collecting plate (26) are all fan-shaped.

6. The range hood according to claim 2, further comprising at least one first rubber member (3) and at least one second rubber member (4), wherein the third smoke collecting plate (25) is located at an outer side of the first smoke collecting plate (23), the fourth smoke collecting plate (26) is located at an outer side of the second smoke collecting plate (24), the first rubber member (3) is installed between the first smoke collecting plate (23) and the third smoke collecting plate (25), and the second rubber member (4) is installed between the second smoke collecting plate (24) and the fourth smoke collecting plate (26).

7. The range hood according to claim 6, further comprising two third rubber members (5), wherein the two third rubber members (5) are respectively mounted on the front side edges of the first smoke collecting plate (23) and the second smoke collecting plate (24).

8. The range hood according to any one of claims 1-7, wherein the driving mechanism (12) includes a mounting plate (121), a speed-reducing motor (122) and a connecting rod assembly (123), the mounting plate (121) is mounted at the upper end inside the fume collecting hood (11), the speed-reducing motor (122) is mounted on the mounting plate (121), one end of the connecting rod assembly (123) is fixedly connected to the rotating shaft of the speed-reducing motor (122), and the inner side of the turning plate (13) is fixedly connected to the other end of the connecting rod assembly (123).

9. The range hood according to claim 8, wherein the connecting rod assembly (123) comprises a driving connecting rod (1231), a first driven connecting rod (1232), a second driven connecting rod (1233), a third driven connecting rod (1234) and a fourth driven connecting rod (1235), one end of the driving connecting rod (1231) is fixedly connected to the rotating shaft of the decelerating motor (122), one end of the first driven connecting rod (1232) is hinged to the mounting plate (121) and located at the front of the rotating shaft of the decelerating motor (122), one end of the second driven connecting rod (1233) is hinged to the other end of the driving connecting rod (1231), the middle of the second driven connecting rod (1233) is hinged to the middle of the first driven connecting rod (1232), one end of the third driven connecting rod (1234) is hinged to the other end of the first driven connecting rod (1232), and one end of the fourth driven connecting rod (1235) is hinged to the other end of the second driven connecting rod (1233), the middle part of the fourth driven connecting rod (1235) is hinged with the other end of the third driven connecting rod (1234), and the inner side surface of the turning plate (13) is fixedly connected with the other end of the fourth driven connecting rod (1235).

10. The range hood according to claim 9, wherein the number of the driving mechanisms (12) is two, and the two driving mechanisms (12) are respectively installed at the left and right ends inside the smoke collecting hood (11).

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