CN218178991U - Fume exhauster - Google Patents

Abstract

The utility model relates to a kitchen appliance's technical field, concretely relates to lampblack absorber. The utility model provides a lampblack absorber includes wind channel, collection cigarette structure and fan. The fan and the smoke collecting structure are arranged in the air duct, and the smoke collecting structure can extend out of the air duct; the smoke collecting structure is provided with a first end and a second end which are oppositely arranged, the second end is communicated with the air duct, and when the smoke collecting structure extends out of the air duct, the first end is communicated with the outside. The fan is provided with a first noise reduction structure; and/or; and a second noise reduction structure is arranged on the inner wall of the air duct. The lampblack absorber is at the during operation, the fan is main noise production structure, set up the first structure of making an uproar that falls on the fan, it falls the structure of making an uproar to set up the second at the wind channel inner wall, the fan is most by the first structure absorption of making an uproar of falling in the noise that the during operation produced, and the structure of making an uproar is fallen by the second that sets up in the wind channel inner wall again to the noise that escapes through the reflection, through setting up the first structure of making an uproar and the second structure of making an uproar of falling, noise that reduction fan during operation produced by a wide margin, improve user experience.

Description

Fume exhauster

Technical Field

The utility model relates to a kitchen appliance's technical field, concretely relates to lampblack absorber.

Background

A range hood is an electrical appliance used in a household kitchen to clean oil smoke generated during cooking. Along with the improvement of performance requirements of people on the range hood, a side-draft range hood with a telescopic smoke collection cavity is provided, and the side-draft range hood comprises a case, a smoke collection assembly, a fan and the like. An air duct used for communicating the smoke exhaust port is formed in the case, an opening is formed in the lower end of the air duct, and the smoke collecting assembly is arranged in the air duct and can extend out of the air duct through the opening. The lower end of the smoke collection component is provided with a smoke inlet, the upper end of the smoke collection component is communicated with the air channel, and the smoke inlet is communicated with the outside after the smoke collection component extends out of the air channel. When the cooking fume collector is used, the fume collecting assembly extends out of the air duct, a fan arranged in the air duct works at a fume inlet to generate negative pressure, and oil fume generated during cooking is introduced into the fume collecting assembly and then is discharged through the air duct and the fume outlet.

Set up inside the wind channel through collecting the cigarette subassembly telescopic, can reduce the fore-and-aft space of lampblack absorber and occupy, the structural design of the big runner in big space simultaneously can set up the higher fan of power in the wind channel, but along with increasing of fan power, the corresponding production that has also increased the noise has seriously influenced user's normal use.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the problem that will solve is: the noise in the existing range hood with the liftable smoke collecting cavity is too high, so that the normal use of a user is influenced.

(II) technical scheme

In order to solve the above technical problem, an embodiment of the present invention provides a range hood, including an air duct, a smoke collecting structure and a fan;

the fan and the smoke collection structure are both arranged in the air channel, and the smoke collection structure can extend out of the air channel; the smoke collection structure is provided with a first end and a second end which are oppositely arranged, the second end is communicated with the air channel, and when the smoke collection structure extends out of the air channel, the first end is communicated with the outside;

a first noise reduction structure is arranged on the fan;

and/or;

and a second noise reduction structure is arranged on the inner wall of the air duct.

Further, the fan comprises a bottom plate and a coaming, and the coaming is arranged along the periphery of the bottom plate;

the bottom plate and the enclosing plate are provided with the first noise reduction structures, and the inner wall of the air duct is provided with the second noise reduction structures.

Further, the first noise reduction structure includes a first noise reduction hole disposed on the base plate and the shroud plate.

Furthermore, the first noise reduction structure comprises a first sound absorption piece, the first sound absorption piece is arranged on the surface of the bottom plate, and/or the first sound absorption piece is arranged on the surface of the enclosing plate.

Further, the first noise reduction structure further comprises a first fixing plate;

the first fixing plate is arranged on the outer side of the enclosing plate, a first mounting cavity is formed between the first fixing plate and the outer wall surface of the enclosing plate, and the first sound absorbing piece arranged on the surface of the enclosing plate is located in the first mounting cavity.

Further, the first sound absorbing piece is made of sound absorbing cotton, and/or the first fixing plate is a perforated plate.

Further, the structure of making an uproar falls in second includes that the second inhales the sound piece, the second inhale the sound piece set up in on the inner wall in wind channel.

Further, the second noise reduction structure further comprises a second fixing plate;

the inner wall of the air duct comprises a first side wall, the second fixing plate is connected with the first side wall, and a second mounting cavity is formed between the second fixing plate and the first side wall;

the second sound absorbing piece is arranged on the first side wall and is located in the second mounting cavity.

Furthermore, the second sound absorbing piece is a sound absorbing cotton, and/or the second fixing plate is a perforated plate.

Further, the bottom plate is connected with the second fixing plate, and a third mounting cavity is formed between the bottom plate and the second fixing plate;

the first sound-absorbing piece arranged on the bottom plate is located in the third installation cavity.

Furthermore, a sinking structure which is sunken towards the direction of the bottom plate is arranged on the second fixing plate, the sinking structure is arranged corresponding to the bottom plate, and the bottom plate is connected with the sinking structure;

the third installation cavity is located between the bottom plate and the sinking structure.

Furthermore, the sinking structure is provided with mounting holes, the bottom plate is provided with footing bulges, and the footing bulges are arranged in one-to-one correspondence with the mounting holes;

the bottom stud bump is provided with a vibration damping pad, and the vibration damping pad is connected with the mounting hole in a clamping mode.

Furthermore, the inner wall of the air duct comprises a second side wall, a slide rail is arranged on the second side wall, and the smoke collection structure is connected with the slide rail in a sliding manner;

the second side wall is provided with a second sound-absorbing piece, and the sliding rail fixes the second sound-absorbing piece on the second side wall.

Furthermore, a hollow structure is arranged on the slide rail.

The utility model has the advantages that:

the utility model provides a pair of range hood, including wind channel, collection cigarette structure and fan. The fan and the smoke collection structure are arranged in the air duct, and the smoke collection structure can extend out of the air duct; the smoke collecting structure is provided with a first end and a second end which are oppositely arranged, the second end is communicated with the air channel, and when the smoke collecting structure extends out of the air channel, the first end is communicated with the outside. The fan is provided with a first noise reduction structure; and/or; and a second noise reduction structure is arranged on the inner wall of the air duct.

The lampblack absorber is at the during operation, the fan is main noise production structure, set up the first structure of making an uproar that falls on the fan, it makes an uproar to fall to set up the second at the wind channel inner wall, the fan is most absorbed by the first structure of making an uproar that falls of noise that the during operation produced, and the noise of escaping the fan through the reflection is once more absorbed by the second structure of making an uproar that falls that sets up in the wind channel inner wall, through setting up the first structure of making an uproar and the second structure of making an uproar that falls, by a wide margin the noise that the reduction fan during operation produced, improve user experience.

Drawings

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

Fig. 1 is a schematic structural diagram of a first viewing angle of a range hood provided by an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second viewing angle of the range hood provided by the embodiment of the present invention;

fig. 3 is a schematic structural view of the fan provided by the embodiment of the present invention in cooperation with a second fixing plate;

fig. 4 is a schematic structural diagram of a first fixing plate according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a fan provided by an embodiment of the present invention;

fig. 6 is a schematic structural view of the matching between the bottom stud protrusion and the damping pad of the fan provided by the embodiment of the present invention;

fig. 7 is a schematic structural view of a second fixing plate provided in the novel embodiment of the plate implementation.

An icon: 1-an air duct; 11-a first side wall; 12-a second side wall; 13-a second fixing plate; 131-a sink structure; 132-mounting holes; 14-a slide rail;

2-a smoke collection structure; 21-a smoke inlet;

3, a fan; 31-a base plate; 311-footing projection; 312-a vibration-damping pad; 32-enclosing plates; 33-a top plate; 34-first fixing plate.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 7, an embodiment of the utility model provides a range hood, including wind channel 1, collection cigarette structure 2 and fan 3. One end of the air duct 1 is communicated with the smoke exhaust port, and the other end is provided with an opening. Fan 3 and collection cigarette structure 2 all set up in wind channel 1, and collection cigarette structure 2 can stretch out wind channel 1 by the opening part in wind channel 1, perhaps retract wind channel 1 by the opening part in wind channel 1. The inside collection smoke chamber that is formed with of collection cigarette structure 2, collection cigarette structure 2 has relative first end and the second end that sets up, and first end is provided with into smoke mouth 21, and the second end communicates with wind channel 1. The smoke collection structure 2 extends out of the air duct 1 from the opening of the air duct 1, that is, the smoke inlet 21 extends out of the air duct 1. The fan 3 is arranged in the air duct 1, negative pressure is formed at the smoke inlet 21 through the rotation of the fan 3, and the oil smoke generated in the cooking process is discharged outdoors through the smoke inlet 21, the smoke collecting cavity, the air duct 1 and the smoke outlet.

The lampblack absorber that this embodiment provided, in order to reduce the noise that the lampblack absorber during operation produced, be provided with the first structure of making an uproar that falls on fan 3, and/or, the inner wall in wind channel 1 is provided with the second and makes an uproar the structure of making an uproar.

In this embodiment, a first noise reduction structure for absorbing sound may be disposed on the fan 3, a second noise reduction structure for absorbing sound may be disposed on the inner wall of the air duct 1, the first noise reduction structure for absorbing sound may be disposed on the fan 3, and the second noise reduction structure for absorbing sound may be disposed on the air duct 1.

Preferably, in order to promote the noise reduction effect, in this embodiment, the mode that the structure of making an uproar falls in fan 3 and the 1 inner wall in wind channel is set up simultaneously and is fallen and make an uproar, promptly, sets up the first structure of making an uproar that falls that is used for inhaling on fan 3, also is provided with the second structure of making an uproar that falls that is used for inhaling the sound simultaneously on wind channel 1.

In this embodiment, fan 3 is the main noise and produces the structure, and fan 3 is at the during operation, and the most part of the noise that produces is absorbed by the first structure of making an uproar of falling, and the noise of fan 3 that escapes through reflection etc. is again set up the second in wind channel 1 inner wall and is fallen the structure absorption of making an uproar, falls the structure through setting up the first structure of making an uproar and second and fall the structure of making an uproar, the noise that reduction fan 3 during operation produced that can be by a wide margin.

As shown in fig. 1 to 6, the fan 3 includes a volute and an impeller, wherein the volute includes a bottom plate 31, a top plate 33, and a shroud 32. The enclosing plate 32 is arranged along the periphery of the bottom plate 31, the outlines of the bottom plate 31 and the top plate 33 are the same, a working cavity is formed among the bottom plate 31, the enclosing plate 32 and the top plate 33, and the impeller is arranged in the working cavity and can rotate in the working cavity under the action of the motor. The inlet of the fan 3 is arranged on the top plate 33.

Optionally, the first noise reducing structure includes first noise reducing apertures provided in the base plate 31 and the shroud plate 32. In this embodiment, the first noise reduction structure is disposed on the bottom plate 31 and the enclosing plate 32, and the top plate 33 is provided with an air inlet to avoid affecting air inlet of the air inlet, and the top plate 33 is not provided with the first noise reduction hole.

In this embodiment, a plurality of first noise reduction holes are disposed on the bottom plate 31 and the surrounding plate 32, and the first noise reduction holes are uniformly arranged on the bottom plate 31 and the surrounding plate 32.

In the embodiment, when the impeller works, the impeller cuts air in the volute to cause airflow disorder, and the airflow pressure in the volute is not uniformly distributed under the influence of the resistance of a narrow space flow channel in the volute, and a sound absorption area is formed by arranging first noise reduction holes on a bottom plate 31 and a surrounding plate 32 of the volute, so that turbulent fluctuation caused by the resistance in the volute is relieved by utilizing a porous sound absorption and noise reduction principle; when the sound wave enters the first noise reduction hole, the air in the first noise reduction hole is caused to vibrate, so that a part of sound energy is converted into heat energy to be consumed, and the purpose of sound absorption is achieved.

Optionally, the first noise reducing structure comprises a first sound absorbing element. The first sound absorbing member is provided on the surface of the base plate 31 and/or the first sound absorbing member is provided on the surface of the shroud 32.

In this embodiment, the first sound absorbing member is provided to absorb noise escaping from the first noise reduction hole.

The first sound absorbing member may be provided on the surface of the base plate 31 alone, may be provided on the surface of the apron 32 alone, or may be provided on both the surfaces of the base plate 31 and the apron 32.

In this embodiment, in order to improve the noise reduction effect and prevent the internal pressure leakage of the fan 3 caused by the simultaneous arrangement of the first noise reduction holes on the shroud 32 and the base plate 31, the first sound absorbing member is arranged on the base plate 31 and the shroud 32. When the sound wave absorber is used, part of sound waves escape from the first noise reduction holes, and the escaped sound waves enter the first sound absorption piece and are absorbed by the first sound absorption piece, so that the noise reduction effect is further improved. Optionally, in this embodiment, the first sound absorbing element is sound absorbing cotton.

The sound-absorbing cotton is artificial inorganic fiber. The glass is prepared by using natural ores such as quartz sand, limestone and dolomite as main raw materials and matching with chemical raw materials such as sodium carbonate and borax. In a melting state, the fibers are blown by external force and thrown into flocculent fine fibers, and the fibers are crossed and intertwined with each other to form a plurality of fine gaps. The sound-absorbing material has the advantages of high sound-absorbing rate, good sound-insulating property, good heat-insulating property and the like.

It is to be understood that, in the present embodiment, the first sound-absorbing member may also be a baffle or the like.

In the present embodiment, the entire surfaces of the bottom plate 31 and the shroud plate 32 are covered with sound absorbing cotton.

As shown in fig. 3 to 6, the first noise reduction structure further includes a first fixing plate 34. The first fixing plate 34 is disposed outside the enclosure 32, and forms a first mounting cavity with the outer wall surface of the enclosure 32, and the first sound-absorbing member disposed on the surface of the enclosure 32 is located in the first mounting cavity.

In this embodiment, bounding wall 32 is the arc structure, and likewise, first fixed plate 34 is the arc setting, and first fixed plate 34 is connected in the outside of bounding wall 32 to form first installation cavity between first fixed plate 34 and bounding wall 32, set up and inhale the sound piece and be fixed in first installation cavity in the first on bounding wall 32 surface.

In this embodiment, the first fixing plate 34 is disposed on the outer surface of the enclosing plate 32, so that the first sound-absorbing member can be closely attached to the outer surface of the enclosing plate 32, and pressure leakage at the first noise reduction hole is avoided.

Optionally, the first fixing plate 34 is a perforated plate. Wherein, the perforated plate, also known as punching plate, is obtained through punching on the panel of different materials.

The first sound absorbing piece is fixed on the outer wall of the enclosing plate 32 through the porous first fixing plate 34, so that the sealing degree of the first sound absorbing piece and the enclosing plate 32 can be enhanced, pressure leakage in the volute is prevented, and the range hood is guaranteed to have enough static pressure; furthermore, the first fixing plate 34 is provided with a plurality of holes, which also can absorb the escaped sound waves.

Optionally, the first fixing plate 34 is integrally formed.

As shown in fig. 3 to 6, the first fixing plate 34 is provided with a first screw hole, the shroud plate 32 is provided with a second screw hole, and the first screw hole and the second screw hole are provided in one-to-one correspondence.

When the first fixing plate 34 is installed, the first screw hole is coaxial with the corresponding second screw hole, and the first fixing plate 34 is fixed on the enclosing plate 32 by sequentially passing through the first screw hole and the second screw hole through the connecting piece.

Optionally, the connector is a screw.

Optionally, the connector is a rivet.

An oil leakage hole is formed in the bottom of the enclosing plate 32, and grease accumulated in the volute can leak out from the oil leakage hole. Preferably, the first screw hole is provided in the periphery of the oil leak hole.

According to the utility model discloses lampblack absorber, structure of making an uproar is fallen including setting up in the second of 1 inner walls in wind channel inhales the sound piece to the second.

In this embodiment, by providing the second sound absorbing member on the inner wall of the air duct 1, the sound wave escaping from the fan 3 can be absorbed by the second sound absorbing member, thereby further improving the sound absorbing and noise reducing effects.

Optionally, in this embodiment, the second sound absorbing member is a sound absorbing cotton.

The sound-absorbing cotton is artificial inorganic fiber. The glass is prepared by using natural ores such as quartz sand, limestone, dolomite and the like as main raw materials and matching with chemical raw materials such as sodium carbonate, borax and the like. In a melting state, the fibers are blown by external force and thrown into flocculent fine fibers, and the fibers are crossed and intertwined with each other to form a plurality of fine gaps. The sound-absorbing material has the advantages of high sound-absorbing rate, good sound-insulating property, good heat-insulating property and the like.

It is to be understood that, in the present embodiment, the second sound-absorbing member may also be a baffle or the like.

In this embodiment, all the inner walls of the air duct 1 are covered with sound absorbing cotton.

As shown in fig. 1 to 3, the air duct 1 is formed by a square housing, the housing includes four side plates, an upper end cover and a lower end cover, the four side plates are sequentially connected to form a box structure, the upper cover plate is connected to the upper end of the box, the lower cover plate is connected to the lower end of the box, the air duct 1 is formed between the four side plates, and the four side plates are respectively a first side wall 11, a second side wall 12, a third side wall and a fourth side wall of the air duct 1; the upper end cover is provided with a smoke outlet, and the lower end cover is provided with an opening for the smoke collecting structure 2 to pass through. The first side wall 11 is a side wall close to the user, and the second side wall 12 is a side wall close to the wall.

As shown in fig. 3 and 7, the second noise reduction structure further includes a second fixing plate 13, the second fixing plate 13 is disposed opposite to the first side wall 11, a second mounting cavity is formed between the second fixing plate 13 and the first side wall 11, and a second sound absorbing member disposed on the first side wall 11 is located in the second mounting cavity.

Optionally, the second fixing plate 13 is a perforated plate.

In this embodiment, the second fixing plate 13 is provided on the first side wall 11, so that the second sound absorbing member can be fixed and a certain sound absorbing effect can be achieved.

As shown in fig. 3, 5, 6 and 7, the bottom plate 31 is connected to the second fixing plate 13, and a third mounting cavity is formed between the bottom plate 31 and the second fixing plate 13; the first sound absorbing member provided on the bottom plate 31 is located in the third installation cavity.

In the present embodiment, considering that the space inside the air duct 1 is limited, the first sound absorbing member outside the bottom plate 31 and the second sound absorbing member outside the first side wall 11 are fixed by using the second fixing plate 13. The bottom plate 31 is connected to the second fixing plate 13, and a third mounting cavity for fixing the first sound absorbing member is formed between the second fixing plate 13 and the bottom plate 31. The second fixing plate 13 is used to fix the second sound-absorbing member on the first side wall 11 and the second sound-absorbing member on the bottom plate 31, so as to save the internal space of the air duct 1.

Alternatively, as shown in fig. 3, 5, 6 and 7, a sinking structure 131 is provided on the second fixing plate 13 and is recessed toward the bottom plate 31, and the sinking structure 131 is provided corresponding to the bottom plate 31, that is, the contour of the sinking structure 131 is the same as the contour of the bottom plate 31. The bottom plate 31 is connected to the sinking structure 131, and the third installation cavity is located between the bottom plate 31 and the sinking structure 131.

In this embodiment, through set up on second fixed plate 13 and sink structure 131, when the lampblack absorber assembly, the installation of fan 3 of being convenient for improves production efficiency, can also play certain damping effect simultaneously.

As shown in fig. 3, 5, 6 and 7, in the present embodiment, the bottom plate 31 is clamped with the second fixing plate 13. Specifically, the sinking structure 131 is provided with a mounting hole 132. The bottom plate 31 is provided with foot protrusions 311, and the foot protrusions 311 are arranged in one-to-one correspondence with the mounting holes 132. The foot protrusion 311 is provided with a damping pad 312, and the damping pad 312 is clamped with the mounting hole 132.

Preferably, the plurality of foot protrusions 311 are provided, and the plurality of foot protrusions 311 are uniformly distributed along the contour of the bottom plate 31, the foot protrusions 311 and the mounting holes 132 are arranged in a one-to-one correspondence, that is, the number and the positions of the foot protrusions 311 and the mounting holes 132 are the same, and each foot protrusion 311 is provided with a damping pad 312.

In this embodiment, by providing the vibration-damping pad 312 on the bottom protrusion 311, the vibration impact on the wall surface of the whole device caused by the vibration of the air duct 1 can be greatly reduced while the fan 3 is fixed, so that the vibration transmission between the fan 3 and the first side wall 11 is weakened, and the vibration sensation is reduced.

Alternatively, in this embodiment, the vibration-damping pad 312 is fixed to the foot protrusion 311 by a screw.

When mounting, the damping pads 312 may be inserted into the corresponding mounting holes 132.

The lampblack absorber that this embodiment provided through connecting fan 3 on second fixed plate 13, realizes that a board is multi-purpose, forms the sound absorption cavity structure of integral type, can enough play the sound absorption and fall the noise function, can play installation fan 3 again, and the function of sound piece is inhaled to fixed second, saves material, reduce cost.

As shown in fig. 1 to 3, the inner wall of the air duct 1 further includes a second side wall 12, and as mentioned above, the second side wall 12 is an inner wall close to one side of the wall surface. The second side wall 12 is provided with a slide rail 14, and the smoke collecting structure 2 is connected with the slide rail 14 in a sliding manner. A driving part is further arranged in the air duct 1, and the driving part drives the smoke collection structure 2 to slide along the extending direction of the slide rail 14 so as to extend out of the air duct 1 from the opening or retract into the air duct 1 from the opening.

In this embodiment, the second sound absorbing member on the second side wall 12 is fixed by the slide rail 14. The second sound absorbing member is located between the second sidewall 12 and the slide rail 14.

Optionally, a plurality of slide rails 14 are arranged on the second side wall 12 at intervals, and all the slide rails 14 cover the second sound-absorbing member; through the slide rail 14 that sets up a plurality of intervals and set up, when improving collection cigarette structure 2 stability, can also inhale the sound piece to the second and fix.

In this embodiment, utilize current slide rail 14 to fix the second sound piece of inhaling, avoid occupying too much wind channel 1 inner space, reduction in production cost.

Preferably, as shown in fig. 1, the sliding rail 14 is provided with a hollow structure.

In this embodiment, be provided with hollow out construction on the slide rail 14 for when agreeing with collection 2 lifting function of cigarette structures, still can not influence and inhale the cotton function of making an uproar of absorbing the sound wave of sound.

Optionally, in this embodiment, the slide rail 14 may be one or more of a ball-type slide rail, a steel ball-type slide rail, or a gear-type slide rail, taking the steel ball-type slide rail as an example, the slide rail 14 is a groove-type slide rail, and the smoke collection structure 2 connected to the slide rail is provided with, for example, a roller, a ball, or a slider, and the roller, the ball, or the slider is embedded in the groove-type slide rail 14 and slides in the groove-type slide rail 14. When the slide rail 14 is a groove-shaped structure, it has a bottom wall, the bottom wall is connected to the second side wall 12 through a screw or the like, and the hollow structure is a hole formed in the bottom wall.

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

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the communication may be direct, indirect via an intermediate medium, or internal to both elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (14)

1. A range hood is characterized by comprising an air duct (1), a smoke collecting structure (2) and a fan (3);

the fan (3) and the smoke collection structure (2) are both arranged in the air duct (1), and the smoke collection structure (2) can extend out of the air duct (1); the smoke collection structure (2) is provided with a first end and a second end which are oppositely arranged, the second end is communicated with the air channel (1), and when the smoke collection structure (2) extends out of the air channel (1), the first end is communicated with the outside;

a first noise reduction structure is arranged on the fan (3);

and/or;

and a second noise reduction structure is arranged on the inner wall of the air duct (1).

2. A range hood according to claim 1, characterized in that the fan (3) comprises a bottom plate (31) and a shroud (32), the shroud (32) being arranged along the periphery of the bottom plate (31);

the bottom plate (31) and the enclosing plate (32) are provided with the first noise reduction structure, and the inner wall of the air duct (1) is provided with the second noise reduction structure.

3. A range hood according to claim 2, characterized in that the first noise reducing structure comprises first noise reducing holes provided in the bottom plate (31) and the shroud plate (32).

4. A range hood as claimed in claim 2, wherein the first noise reducing structure comprises a first sound absorbing member provided on the surface of the base plate (31) and/or on the surface of the shroud (32).

5. A range hood according to claim 4, characterized in that the first noise reducing structure further comprises a first fixing plate (34);

the first fixing plate (34) is arranged on the outer side of the enclosing plate (32), a first mounting cavity is formed between the first fixing plate and the outer wall surface of the enclosing plate (32), and the first sound absorbing piece arranged on the surface of the enclosing plate (32) is located in the first mounting cavity.

6. A fume exhauster according to claim 5, characterized in that said first sound-absorbing element is a sound-absorbing cotton and/or said first fixing plate (34) is a perforated plate.

7. A range hood according to any of claims 4 to 6, characterized in that the second noise reducing structure comprises a second sound absorbing element arranged on the inner wall of the air duct (1).

8. A fume exhauster according to claim 7, wherein said second noise reducing structure further comprises a second fixing plate (13);

the inner wall of the air duct (1) comprises a first side wall (11), the second fixing plate (13) is connected with the first side wall (11), and a second mounting cavity is formed between the second fixing plate (13) and the first side wall (11);

the second sound absorbing piece is arranged on the first side wall (11) and is positioned in the second mounting cavity.

9. A kitchen ventilator according to claim 8, characterised in that said second sound-absorbing element is a sound-absorbing cotton and/or said second fixing plate (13) is a perforated plate.

10. The range hood according to claim 8, characterized in that the bottom plate (31) is connected with the second fixing plate (13), and a third mounting cavity is formed between the bottom plate (31) and the second fixing plate (13);

the first sound-absorbing piece arranged on the bottom plate (31) is positioned in the third mounting cavity.

11. A range hood according to claim 10, characterized in that a sinking structure (131) sinking towards the direction of the bottom plate (31) is arranged on the second fixing plate (13), the sinking structure (131) is arranged corresponding to the bottom plate (31), and the bottom plate (31) is connected with the sinking structure (131);

the third installation cavity is located between the bottom plate (31) and the sinking structure (131).

12. A range hood as claimed in claim 11, wherein the sinking structure (131) is provided with mounting holes (132), the bottom plate (31) is provided with foot protrusions (311), and the foot protrusions (311) are arranged in one-to-one correspondence with the mounting holes (132);

be provided with damping pad (312) on footing arch (311), damping pad (312) with mounting hole (132) joint.

13. A range hood as claimed in claim 7, wherein the inner wall of the air duct (1) comprises a second side wall (12), a sliding rail (14) is arranged on the second side wall (12), and the smoke collecting structure (2) is slidably connected with the sliding rail (14);

the second side wall (12) is provided with the second sound-absorbing piece, and the slide rail (14) fixes the second sound-absorbing piece on the second side wall (12).

14. A range hood according to claim 13, characterized in that a hollowed-out structure is arranged on the slide rail (14).

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