CN217178662U - Smoke exhaust system - Google Patents

Abstract

The utility model belongs to the technical field of kitchen equipment, a system of discharging fume is disclosed, including bellows assembly, the assembly and the first fastener of bleeding, wherein, the inner wall interval of bellows assembly is provided with two first mountings, and the both sides that the assembly is relative of bleeding all are provided with the second mounting, and the second mounting and two first mounting one-to-one settings of both sides, and the second mounting can be set up on corresponding first mounting, and first fastener is used for locking second mounting and first mounting. When the installation direction of the air exhaust assembly needs to be changed, the second fixing pieces on two sides of the air exhaust assembly can be lifted, the direction of the air exhaust assembly is adjusted, then the air exhaust assembly is placed until the second fixing pieces on two sides of the air exhaust assembly are erected on the first fixing piece, and finally the second fixing pieces are locked on the first fixing piece through the first fastening pieces, so that the operation procedure during reversing is simplified, the replacement efficiency is improved, and the stability and the reliability of the air exhaust assembly after reversing can be guaranteed.

Description

Smoke exhaust system

Technical Field

The utility model relates to a kitchen equipment technical field especially relates to a system of discharging fume.

Background

The integrated kitchen range is kitchen equipment integrating a range hood, a gas stove, a disinfection cabinet, a storage cabinet and other appliances, and has the advantages of space saving, oil smoke reduction, energy saving, low consumption, environmental protection and the like. Wherein the smoke suction port of the range hood is positioned above the gas stove, and the core part of the range hood is a smoke exhaust system. The smoke exhaust system comprises an air exhaust assembly, the air exhaust assembly is provided with an air inlet and an air outlet, the air inlet can be communicated with a smoke suction port of the range hood, and the air outlet can be communicated with a smoke exhaust pipeline installed in a kitchen. The air exhaust assembly can be started during cooking, so that negative pressure is formed at the air inlet of the air exhaust assembly, oil smoke is sucked through the smoke suction port of the range hood, and the sucked oil smoke is exhausted outdoors through the air outlet and the smoke exhaust pipeline.

When the integrated kitchen is actually installed, the smoke exhaust pipeline may be located on the left side of the integrated kitchen or on the right side of the integrated kitchen, and the phenomenon that the air outlet of the air exhaust assembly does not face the smoke exhaust pipeline exists. In this case, to simplify the construction process, the air extraction assembly of the smoke exhaust system is usually reversed so that the air outlet of the air extraction assembly can be aligned and communicated with the smoke exhaust duct.

However, in the prior art, when the reversing operation is performed on the air exhaust assembly, the process is complicated, the replacement efficiency is low, the construction progress is prolonged, and the stability and the reliability of the air exhaust assembly after reversing can not be ensured.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a system of discharging fume can simplify the operation when the assembly that bleeds commutates, improves and changes efficiency for kitchen construction progress, and can guarantee steadiness and reliability after the assembly that bleeds commutates.

To achieve the purpose, the utility model adopts the following technical proposal:

provided is a smoke evacuation system including:

the inner wall of the air box assembly is provided with two first fixing pieces at intervals;

the two opposite sides of the air exhaust assembly are provided with second fixing pieces, and the second fixing pieces are erected on the corresponding first fixing pieces;

and the first fastener is used for locking the second fixing piece and the first fixing piece.

As the utility model provides a preferred scheme of system of discharging fume, first mounting includes first bracket and the second bracket that the interval set up, first bracket with the second bracket set up respectively in two inner walls that bellows assembly is relative, set up respectively at the both ends of second mounting first bracket with the second bracket.

As the utility model provides a preferred scheme of system of discharging fume, first bracket with the second bracket all includes continuous first layer board and first support, the second mounting set up in on the first layer board, first support connect in the inner wall of bellows assembly.

As the utility model provides a smoke exhaust system's preferred scheme, the second mounting includes overlap joint portion, overlap joint portion sets up on the first mounting, the both sides that overlap joint portion is relative are provided with connecting portion and handle portion respectively, connecting portion with the assembly fixed connection of bleeding, the handle portion is along keeping away from the direction of the assembly of bleeding extends.

As the utility model provides a preferred scheme of system of discharging fume, the both sides that the bellows assembly is relative all are provided with the wind channel mouth, the inner wall of bellows assembly in the border of wind channel mouth is provided with the third mounting, the assembly of bleeding includes the guide duct, the air-out end of guide duct is provided with the fourth mounting, the fourth mounting set up connect in the third mounting, so that the guide duct can with arbitrary the wind channel mouth is just to and the intercommunication.

As the utility model provides a preferred scheme of system of discharging fume, third mounting includes third bracket and the fourth bracket that the interval set up, the third bracket with the fourth bracket branch is located the both sides that the wind channel mouth is relative, the fourth mounting including set up in turn over the hem on the guide duct, turn over the both ends of hem set up respectively connect in the third bracket with the fourth bracket.

As the utility model provides a smoke exhaust system's preferred scheme, the third bracket with the fourth bracket all includes continuous second layer board and second support, the second leg joint in the inner wall of bellows assembly, the air-out pot head of guide duct is equipped with the installation ring body, turn over the hem set up in on the installation ring body, the second layer board with be provided with between the inner wall of bellows assembly and be used for passing the clearance of dodging of installation ring body, turn over the hem set up connect in on the second layer board.

As the utility model provides a preferred scheme of exhaust fume system, the assembly of bleeding still includes the spiral case subassembly that is used for producing the negative pressure, the air outlet of spiral case subassembly connect in the guide duct, the both sides that the spiral case subassembly is relative all are provided with the second mounting.

As the utility model provides a preferred scheme of system of discharging fume, the sunken funnel structure that forms of diapire of bellows assembly, the bottommost of funnel structure is provided with first oilhole, the below interval of funnel structure just is just being provided with and connects the food tray.

As the utility model provides a preferred scheme of system of discharging fume still includes the dirty box of collection, it is hourglass hopper-shaped to connect the food tray, connect the food tray to go up the concave guiding gutter that is equipped with, the diapire of guiding gutter is provided with the second and crosses the oilhole, warp the fluid that the first oilhole that crosses flows can be followed the guiding gutter converges extremely the oilhole is crossed to the second, the dirty box interval of collection just to set up in the below of oilhole is crossed to the second.

The utility model has the advantages that:

the utility model provides a smoke exhaust system, including bellows assembly, the assembly and the first fastener of bleeding, wherein, the inner wall interval of bellows assembly is provided with two first mountings, and the both sides that the assembly is relative of bleeding all are provided with the second mounting, and the second mounting and two first mounting one-to-ones of both sides set up, and the second mounting can be set up on corresponding first mounting, and first fastener is used for locking second mounting and first mounting. When the installation direction of the air exhaust assembly needs to be changed, the connection between the second fixing piece and the first fixing piece needs to be disassembled firstly, and the second fixing piece is placed on the first fixing piece, so that the second fixing pieces on two sides of the air exhaust assembly can be lifted, the direction of the air exhaust assembly is adjusted, the air exhaust assembly is placed afterwards, the air exhaust assembly is placed on the first fixing piece until the second fixing pieces on two sides of the air exhaust assembly are placed on the first fixing piece, the air exhaust assembly is shown to be installed in place, and finally, the second fixing piece is locked on the first fixing piece through the first fastening piece, and the installation stability of the air exhaust assembly inside the air box assembly is ensured. Through setting up second mounting and the first mounting that can overlap joint, can simplify the operation when taking out the assembly and commutate, improve and change efficiency for kitchen construction progress, and can guarantee the steadiness and the reliability after taking out the assembly switching-over.

Drawings

Fig. 1 is an external schematic view of a smoke evacuation system according to an embodiment of the present invention;

fig. 2 is a first internal view of a smoke evacuation system provided in accordance with an embodiment of the present invention;

fig. 3 is a second internal view of a smoke evacuation system provided in accordance with an embodiment of the present invention;

FIG. 4 is a first schematic view of a pump assembly according to an embodiment of the present invention;

FIG. 5 is a second schematic view of a second embodiment of the present invention;

fig. 6 is a schematic position diagram of a second supporting plate according to an embodiment of the present invention;

fig. 7 is a schematic structural view of an oil pan according to an embodiment of the present invention.

In the figure:

1. an air box assembly; 2. an air extraction assembly; 3. an oil receiving pan; 4. a connecting plate;

11. a first fixing member; 12. an air duct opening; 13. a third fixing member; 14. a funnel structure; 15. a flaring air inlet part;

111. a first bracket; 112. a second bracket;

1111. a first pallet; 1112. a first bracket;

131. a third bracket; 132. a fourth bracket; 133. avoiding the gap;

1311. a second pallet; 1312. a second bracket;

141. a first oil passing hole;

21. a second fixing member; 22. an air guide pipe; 23. a fourth fixing member; 24. a volute assembly;

211. a lap joint section; 212. a connecting portion; 213. a handle part;

221. a baffle;

231. folding edges; 232. a mounting ring body;

31. a diversion trench; 32. the second oil passing hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 to 3, the present embodiment provides a smoke evacuation system, which includes a bellows assembly 1, a pumping assembly 2, and a first fastening member for fixing the pumping assembly 2 in the bellows assembly 1.

Referring to fig. 2 and 3, two first fixing members 11 are disposed at intervals on the inner wall of the bellows assembly 1, second fixing members 21 are disposed on two opposite sides of the pumping assembly 2, and the second fixing members 21 on the two sides are disposed in one-to-one correspondence with the two first fixing members 11. The second fixing member 21 can be overlapped on the corresponding first fixing member 11, and the first fastening member is used for fastening the second fixing member 21 and the first fixing member 11. When the installation direction of the air extraction assembly 2 needs to be changed, the connection between the second fixing member 21 and the first fixing member 11 needs to be disassembled first, and the second fixing member 21 is overlapped on the first fixing member 11, so that the second fixing members 21 on the two sides of the air extraction assembly 2 can be lifted by hand, and the direction of the air extraction assembly 2 can be adjusted. The pumping assembly 2 is then lowered until the second fixing members 21 on both sides thereof are lapped on the first fixing member 11, indicating that the pumping assembly 2 is mounted in place. Finally, the second fixing member 21 is locked to the first fixing member 11 by using the first fastening member, so as to ensure the installation stability of the pumping assembly 2 inside the bellows assembly 1.

In this embodiment, but through setting up lapped second mounting 21 and first mounting 11, can simplify the operation when taking the reverse direction to air exhaust assembly 2, improve and change efficiency for the kitchen construction progress, and can guarantee stability and reliability after taking the reverse direction of air exhaust assembly 2.

Referring to FIG. 2, the air extraction assembly 2 is shown in a configuration in which it is mounted in a right orientation. Referring to FIG. 3, the air extraction assembly 2 is shown in a configuration in which it is mounted in a leftward orientation. When the installation direction of the air exhaust assembly 2 is changed, the top of the bellows assembly 1 can be disassembled to form enough replacement operation space.

In the present embodiment, referring to FIGS. 2 and 3, the extraction assembly 2 includes a volute assembly 24 for generating a negative pressure. The volute component 24 comprises an air inlet and an air outlet, the air inlet is only an air inlet end of the whole air exhaust assembly 2 and can be communicated with a smoke suction port of the range hood, the air outlet of the volute component 24 is connected with an air guide pipe 22, and the air guide pipe 22 can be communicated with a smoke exhaust pipeline so as to exhaust the extracted oil smoke to the outside.

Further, the opposite sides of the volute assembly 24 are provided with the above-mentioned second fixing members 21. Because the volute component 24 can generate certain vibration during operation, the second fixing part 21 is locked on the first fixing part 11, so that the stability of the volute component 24 can be ensured, and the phenomenon that the volute component 24 shakes a large range during operation is avoided. Moreover, the second fixing pieces 21 are respectively arranged at two sides of the volute component 24, so that the reversing operation is more convenient and smooth.

Referring to fig. 2 and 3, the first fixing member 11 includes a first bracket 111 and a second bracket 112 that are spaced apart from each other. The first bracket 111 and the second bracket 112 are respectively disposed on two opposite inner walls of the bellows assembly 1, specifically, the first bracket 111 is disposed on the rear plate of the bellows assembly 1, and the second bracket 112 is disposed on the front plate of the bellows assembly 1. The both ends of second mounting 21 are set up respectively on first bracket 111 and second bracket 112, and spiral case subassembly 24 is located between first bracket 111 and the second bracket 112, when guaranteeing that spiral case subassembly 24 has sufficient installation space, can also ensure the steadiness after spiral case subassembly 24 installs, avoids having the weak link of connection.

Referring to fig. 4, each of the first bracket 111 and the second bracket 112 includes a first supporting plate 1111 and a first bracket 1112 connected to each other, the second fixing member 21 is attached to the first supporting plate 1111, and the first bracket 1112 is connected to an inner wall of the bellows assembly 1. The first supporting plate 1111 is a flat plate to ensure that the first supporting plate 1111 and the second fixing member 21 are in plane contact with each other, thereby improving the stability after installation. The first supporting plate 1111 is installed on the inner wall of the bellows assembly 1 through the first bracket 1112, and specifically, the first bracket 1112 includes supporting portions respectively disposed at two sides of the first supporting plate 1111 to ensure the supporting stability of the first supporting plate 1111 and prevent the first supporting plate 1111 from deforming due to bearing the gravity load of the air exhaust assembly 2.

With continued reference to fig. 4, optionally, the second fixing member 21 includes an overlapping portion 211, and the overlapping portion 211 is overlapped on the first fixing member 11. The overlapping part 211 is a flat plate, which is overlapped on the first supporting plate 1111 of the first fixing member 11 with a plane contact therebetween.

When the air extraction assembly 2 is installed, the first fastening member is passed through the overlapping portion 211 and the corresponding first supporting plate 1111 to lock the second fixing member 21 and the first fixing member 11, thereby fixing the volute component 24 inside the bellows assembly 1.

Illustratively, the first fastener may be a combination of a bolt and a nut or a fastening screw.

Alternatively, referring to fig. 4, the opposite sides of the overlapping part 211 are provided with a connecting part 212 and a handle part 213, respectively. The connection portion 212 is fixedly connected to the volute assembly 24 of the pumping assembly 2, and the handle portion 213 extends in a direction away from the volute assembly 24. That is, the handle parts 213 at both sides of the scroll casing assembly 24 are suspended from the scroll casing assembly 24, so that the constructor can conveniently carry the handle parts 213 at both sides for reversing operation.

Illustratively, the connection portion 212 is welded to the outer wall of the volute assembly 24.

In this embodiment, referring to fig. 1, two opposite sides of the bellows assembly 1 are provided with air duct openings 12. The duct 22 of the air extraction assembly 2 is selectively communicated with any one of the air duct openings 12, so that the air extraction assembly 2 can work normally in both installation directions. The outer side of the air duct opening 12 is connected with the air inlet end of the smoke exhaust pipeline so as to guide the extracted oil smoke to the outdoor.

Further, the air inlet end of the smoke exhaust pipeline is parallel to the air guide pipe 22, so that the air guide pipe 22 and the air inlet end of the smoke exhaust pipeline form a direct-exhaust air channel, occupied space can be reduced, air quantity loss can be reduced, and smoke exhaust efficiency is improved.

Preferably, a plurality of guide plates 221 are arranged in the air guide pipe 22 at intervals and in parallel, and the guide plates 221 can comb air flow, so that impact of the air flow and the air duct opening 12 is reduced, turbulence is prevented from being generated, noise is effectively reduced, and the use experience of a user is improved.

Referring to fig. 2, the inner wall of the bellows assembly 1 is provided with a third fixing member 13 at the edge of the air duct opening 12, the air outlet end of the air guiding pipe 22 is provided with a fourth fixing member 23, and the fourth fixing member 23 is connected to the third fixing member 13 in an erected manner, so that the air guiding pipe 22 can be opposite to and communicated with any air duct opening 12. In the process of placing the air exhaust assembly 2 downwards, when the second fixing part 21 is erected on the first fixing part 11, the fourth fixing part 23 is also erected on the third fixing part 13, and at the moment, the positioning work of the air exhaust assembly 2 is completed, so that the air exhaust assembly is convenient and rapid to use, and the positioning is accurate.

Optionally, the fourth fixing member 23 and the third fixing member 13 are fastened together by a second fastening member to ensure the stability of the air duct 22 inside the bellows assembly 1.

Referring to fig. 2 and 5, the third fixing member 13 includes a third bracket 131 and a fourth bracket 132 that are spaced apart from each other, and the third bracket 131 and the fourth bracket 132 are respectively disposed on opposite sides of the air duct opening 12. The fourth fixing member 23 includes a folded edge 231 disposed on the air guide duct 22, and two ends of the folded edge 231 are respectively connected to the third bracket 131 and the fourth bracket 132.

Referring to fig. 4, each of the third and fourth brackets 131 and 132 includes a second support plate 1311 and a second bracket 1312 coupled thereto. The second bracket 1312 is connected to the inner wall of the bellows assembly 1 for supporting the second support plate 1311. The flap 231 is attached to the second retainer 1311. The second support plate 1311 and the above-mentioned turned edge 231 are both flat plates, so that they are in planar contact after being lapped, thereby improving the installation stability of the air guide duct 22.

Referring to fig. 4, the air outlet end of the air guiding pipe 22 is sleeved with a mounting ring 232. The mounting ring 232 can be attached to the side plate of the bellows assembly 1 to ensure the sealing property after the air duct 22 is connected to the air duct opening 12. The flanging 231 is arranged on the mounting ring body 232 and extends in a direction away from the side plate of the bellows assembly 1. Referring to fig. 5, two ends of the folded edge 231 are suspended to extend a certain distance from the air duct 22, so that the two ends of the folded edge 231 can be smoothly overlapped on the two second supporting plates 1311.

Further, the turned edge 231 and the second support plate 1311 are connected by a second fastening member, which may be a combination of bolts and nuts or a fastening screw.

Referring to fig. 6, an avoidance gap 133 for passing through the installation ring 232 is provided between the second support plate 1311 and the inner wall of the bellows assembly 1, so that when the air exhaust assembly 2 is lowered, interference between the installation ring 232 and the second support plate 1311 is avoided, and the installation ring 232 can be attached to the side plate of the bellows assembly 1.

Referring to fig. 1 and 2, the top of the bellows assembly 1 is provided with a flared air inlet portion 15. The cross-sectional dimension of the flared air inlet portion 15 increases progressively in a direction away from the volute assembly 24. That is, the flared air inlet portion 15 is in a shape of a bell mouth, and has a large enough air inlet space to ensure that most of the oil smoke can enter the bellows assembly 1 through the flared air inlet portion 15 and then be sucked into the volute component 24.

Referring to fig. 2 and 6, the bottom wall of the bellows assembly 1 is recessed to form a funnel structure 14. The bottom end of the funnel structure 14 is provided with a first oil passing hole 141, and the oil receiving disc 3 is arranged below the funnel structure 14 at an interval and opposite to the lower end. The first oil passing hole 141 is arranged opposite to the flaring air inlet portion 15. The oil smoke can be attached to the inner wall of the air box assembly 1 after entering the air box assembly 1 or attached to the volute component 24, and along with the lapse of time, the oil smoke can drop to the bottom wall (the funnel structure 14) of the air box assembly 1 due to the action of gravity, and then flows out through the first oil passing hole 141 and enters the oil receiving disc 3, so that the oil liquid is prevented from accumulating in the air box assembly 1.

Referring to fig. 7, the oil receiving pan 3 is funnel-shaped, the oil receiving pan 3 is concavely provided with a guiding groove 31, the bottom wall of the guiding groove 31 is provided with a second oil passing hole 32, oil flowing out through the first oil passing hole 141 can converge to the second oil passing hole 32 along the guiding groove 31, referring to the direction in fig. 7, the right side of the guiding groove 31 is opposite to the first oil passing hole 141, and the second oil passing hole 32 is arranged on the left side of the guiding groove 31 and located at the lowest point of the whole guiding groove 31, so that the oil entering the guiding groove 31 can flow downstream to the second oil passing hole 32. The sewage collecting box is arranged below the oil receiving disc 3 at intervals and just opposite to the oil receiving disc. The oil flowing out through the second oil passing hole 32 finally enters the dirt collecting box. When the range hood is used for a period of time, the dirt collecting box can be replaced and cleaned.

Referring to fig. 1 and 2, in the present embodiment, the funnel structure 14 and the oil pan 3 are fixedly connected by the connecting plate 4. Specifically, a flange is arranged on the funnel structure 14, and the connecting plate 4 is an L-shaped plate. The vertical plate of L template and turn-ups parallel arrangement on the funnel structure 14 and paste, the horizontal plate of L template and the upper surface parallel arrangement who connects food tray 3 just paste and paste. When the oil receiving tray is fixed, the vertical plate of the L-shaped plate, the turned edge on the funnel structure 14 and the transverse plate of the L-shaped plate are locked with the oil receiving tray 3 through fasteners such as bolts.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A smoke evacuation system, comprising:

the air box assembly (1) is provided with two first fixing pieces (11) on the inner wall at intervals;

the two opposite sides of the air exhaust assembly (2) are provided with second fixing pieces (21), and the second fixing pieces (21) are erected on the corresponding first fixing pieces (11);

a first fastener for locking the second fixing member (21) and the first fixing member (11).

2. The smoke evacuation system of claim 1, wherein the first fixing member (11) comprises a first bracket (111) and a second bracket (112) which are arranged at intervals, the first bracket (111) and the second bracket (112) are respectively arranged on two opposite inner walls of the bellows assembly (1), and two ends of the second fixing member (21) are respectively overlapped on the first bracket (111) and the second bracket (112).

3. The smoke evacuation system of claim 2, wherein the first bracket (111) and the second bracket (112) each comprise a first bracket plate (1111) and a first bracket (1112) connected, the second fixture (21) is rested on the first bracket plate (1111), and the first bracket (1112) is connected to an inner wall of the bellows assembly (1).

4. The smoke evacuation system of claim 1, wherein the second fixing member (21) comprises a lap joint part (211), the lap joint part (211) is overlapped on the first fixing member (11), two opposite sides of the lap joint part (211) are respectively provided with a connecting part (212) and a handle part (213), the connecting part (212) is fixedly connected with the air exhaust assembly (2), and the handle part (213) extends in a direction away from the air exhaust assembly (2).

5. The smoke exhaust system according to claim 1, wherein air duct openings (12) are formed in two opposite sides of the air box assembly (1), a third fixing member (13) is arranged on the edge of the air duct opening (12) on the inner wall of the air box assembly (1), the air exhaust assembly (2) comprises an air guide pipe (22), a fourth fixing member (23) is arranged at the air outlet end of the air guide pipe (22), and the fourth fixing member (23) is connected to the third fixing member (13) in an erected mode so that the air guide pipe (22) can be opposite to and communicated with any air duct opening (12).

6. The smoke evacuation system of claim 5, wherein the third fixing member (13) comprises a third bracket (131) and a fourth bracket (132) which are arranged at intervals, the third bracket (131) and the fourth bracket (132) are respectively arranged at two opposite sides of the air duct opening (12), the fourth fixing member (23) comprises a turned edge (231) arranged on the air duct (22), and two ends of the turned edge (231) are respectively connected to the third bracket (131) and the fourth bracket (132) in an overlapping manner.

7. The smoke evacuation system of claim 6, wherein the third bracket (131) and the fourth bracket (132) each comprise a second supporting plate (1311) and a second support (1312) connected to each other, the second support (1312) is connected to an inner wall of the bellows assembly (1), a mounting ring body (232) is sleeved on an air outlet end of the air guide pipe (22), the turning edge (231) is disposed on the mounting ring body (232), an avoidance gap (133) for passing through the mounting ring body (232) is disposed between the second supporting plate (1311) and the inner wall of the bellows assembly (1), and the turning edge (231) is erected and connected to the second supporting plate (1311).

8. The smoke evacuation system of claim 5, wherein the air exhaust assembly (2) further comprises a volute assembly (24) for generating negative pressure, an air outlet of the volute assembly (24) is connected to the air guide pipe (22), and the second fixing member (21) is disposed on two opposite sides of the volute assembly (24).

9. The smoke exhaust system according to claim 1, wherein the bottom wall of the air box assembly (1) is recessed to form a funnel structure (14), the lowermost end of the funnel structure (14) is provided with a first oil passing hole (141), and an oil receiving disc (3) is arranged below and in a spaced and opposite mode on the funnel structure (14).

10. The smoke exhaust system according to claim 9, further comprising a dirt collecting box, wherein the oil receiving pan (3) is funnel-shaped, a diversion trench (31) is concavely arranged on the oil receiving pan (3), a second oil passing hole (32) is arranged on the bottom wall of the diversion trench (31), oil flowing out from the first oil passing hole (141) can flow together to the second oil passing hole (32) along the diversion trench (31), and the dirt collecting box is arranged at an interval and just opposite to the lower part of the second oil passing hole (32).

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