Range hood with air cabinet for noise reduction

Abstract

The utility model discloses a range hood with an air cabinet for noise reduction, which belongs to the technical field of range hoods and comprises an air cabinet arranged on a range hood body, and an upper volute fan component and a noise reduction box component are arranged in the air cabinet. The noise reduction box assembly is located on the rear side of the upper volute fan assembly, and a noise reduction device is arranged on the noise reduction box assembly. According to the range hood, negative pressure is formed in the air cabinet through the upper volute fan assembly, so that lampblack airflow in the range hood body can be sucked into the noise reduction box assembly, the upper volute fan assembly is located on the front side of the noise reduction box assembly, meanwhile, the noise reduction device is arranged on the noise reduction box assembly, and therefore the lampblack airflow can be sucked into the noise reduction box assembly after being subjected to noise reduction through the noise reduction device. And then the oil smoke is sucked and exhausted by the upper volute fan assembly, so that the noise generated when the oil smoke airflow is in contact with and impacts the upper volute fan assembly is reduced, the noise generated when the oil smoke airflow flows in the air cabinet is effectively reduced, and the noise reduction effect of the smoking machine is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, and specifically relates to a range hood with a noise-reducing air cabinet. Background Art

[0002] The utility model patent with the Chinese patent number CN201810026582.9 discloses a low-noise self-cleaning range hood, which comprises a body, an air cabinet, a wind wheel mechanism and a heating and noise-reducing volute. The heating and noise-reducing volute is installed in the air cabinet and comprises an orifice plate and a volute. A noise-reducing sealed cavity is formed between the orifice plate and the volute. The volute is provided with volute small holes, and a heating resistance wire is arranged in the noise-reducing sealed cavity. According to the Helmholtz resonator principle or the orifice wall friction effect, when the flue gas flows through the heating and noise-reducing volute, the kinetic energy of the flue gas is converted into heat energy, achieving the effect of reducing noise. However, in the process of converting kinetic energy into heat energy, the heating element needs to consume electric energy, resulting in high use costs, and the heating element may also be damaged, with poor use stability.

[0003] Therefore, relevant technical personnel have developed a physical noise reduction method. For example, a range hood disclosed in the utility model patent with the Chinese patent number CN202222379206.2 installs a noise-reducing plate corresponding to the fan on the inner wall of the air cabinet box. The noise-reducing plate is provided with a plurality of second sound-absorbing holes to absorb and consume the sound energy generated by the air flow and the fan, reducing the noise of the fan. However, since the noise-reducing plate is located behind the fan, it cannot be fully contacted with the oil fume, and cannot effectively eliminate the wind noise generated when the oil fume flows.

[0004] Therefore, it is necessary to further improve. Content of the Utility Model

[0005] The utility model aims to provide a range hood with a noise-reducing air cabinet to overcome the deficiencies in the prior art.

[0006] A range hood with a noise-reducing air cabinet designed according to this purpose includes an air cabinet arranged on the range hood main body. An upper volute fan assembly and a noise-reducing box assembly are arranged in the air cabinet. The noise-reducing box assembly is located behind the upper volute fan assembly and is provided with a noise reduction device thereon.

[0007] The noise-reducing box assembly includes, but is not limited to, a triangular shape, a polygonal shape, a circular shape, an oval shape, or a combined shape thereof, and is integrally formed or spliced by a plurality of split components. The noise reduction device is arranged at the whole or partial position thereof.

[0008] The noise reduction device includes noise reduction through holes and / or sound-absorbing cotton.

[0009] The noise reduction through holes include, but are not limited to, a triangular shape, a polygonal shape, a circular shape, an oval shape, or a combined shape thereof.

[0010] The diameter of the noise reduction through-hole is 2-3 mm, and the center distance between adjacent noise reduction through-holes is more than 6 mm.

[0011] The noise reduction box assembly includes a front noise reduction plate, a rear noise reduction plate, a top noise reduction plate, and left and right side noise reduction plates.

[0012] The noise reduction device composed of noise reduction through-holes and / or sound-absorbing cotton is provided on the front noise reduction plate, the rear noise reduction plate, the top noise reduction plate, and the left and right side noise reduction plates.

[0013] A number of the noise reduction through-holes are respectively provided at the overall or partial positions of the front noise reduction plate, the rear noise reduction plate, the top noise reduction plate, and / or the left and right side noise reduction plates.

[0014] The outer side of the front noise reduction plate is provided with front noise reduction plate sound-absorbing cotton as a whole or partially, the outer side of the rear noise reduction plate is provided with rear noise reduction plate sound-absorbing cotton as a whole or partially, the outer side of the top noise reduction plate is provided with top noise reduction plate sound-absorbing cotton as a whole or partially, and / or the outer side of the left and right side noise reduction plates is provided with left and right side noise reduction plate sound-absorbing cotton as a whole or partially.

[0015] A noise reduction smoke collecting cavity is formed between the front noise reduction plate, the rear noise reduction plate, the top noise reduction plate, and the left and right side noise reduction plates.

[0016] A fan smoke suction cavity is further provided in the air cabinet, and the fan smoke suction cavity is located on the front side of the noise reduction smoke collecting cavity; the upper volute fan assembly is located in the fan smoke suction cavity.

[0017] The front noise reduction plate, the rear noise reduction plate, the top noise reduction plate, and / or the left and right side noise reduction plates are inclined in the direction of the fan smoke suction cavity.

[0018] A noise reduction air inlet is provided between the bottoms of the left and right side noise reduction plates, the front noise reduction plate, and the rear noise reduction plate; a front noise reduction plate air outlet is provided on the front noise reduction plate; a casing smoke exhaust port is provided at the top of the smoke machine main body; a air cabinet smoke exhaust port is provided at the top of the fan smoke suction cavity; a fan air inlet is provided at the side of the upper volute fan assembly, and a fan air outlet is provided at the top.

[0019] The noise reduction air inlet is communicated with the casing smoke exhaust port; the fan air inlet is communicated with the front noise reduction plate air outlet; the fan air outlet is communicated with the air cabinet smoke exhaust port.

[0020] Through the improvement of the above structure, the present utility model utilizes the upper volute fan assembly to form a negative pressure inside the air cabinet, so that the oil fume airflow inside the main body of the range hood can be inhaled into the noise reduction box assembly. Since the upper volute fan assembly is located on the front side of the noise reduction box assembly, and a noise reduction device is provided on the noise reduction box assembly, the oil fume airflow can be noise-reduced through the noise reduction device and then sucked and discharged by the upper volute fan assembly, so as to reduce the noise generated by the contact and impact of the oil fume airflow on the upper volute fan assembly, thereby effectively reducing the noise of the oil fume airflow flowing inside the air cabinet, and further improving the noise reduction effect of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic assembly structure diagram of an embodiment of the present utility model.

[0022] Figure 2 is a schematic exploded structure diagram of an embodiment of the present utility model.

[0023] Figure 3 is a schematic exploded structure diagram of an embodiment of the present utility model with the main body of the range hood omitted.

[0024] Figure 4 is a schematic exploded structure diagram of another perspective of an embodiment of the present utility model with the main body of the range hood omitted.

[0025] Figure 5 is a schematic assembled sectional structure diagram of an embodiment of the present utility model with the main body of the range hood omitted.

[0026] Figure 6 is a schematic exploded structure diagram of the noise reduction box assembly.

[0027] In the drawings: 1 - main body of the range hood, 2 - upper volute fan assembly, 3 - noise reduction box assembly, 4 - fan air inlet, 5 - fan air outlet, 20 - casing smoke exhaust port, 22 - box body noise reduction through hole, 23 - front noise reduction plate, 24 - rear noise reduction plate, 25 - top noise reduction plate, 26 - left and right side noise reduction plates, 27 - noise reduction smoke collection cavity, 28 - front noise reduction plate sound-absorbing cotton, 29 - rear noise reduction plate sound-absorbing cotton, 30 - top noise reduction plate sound-absorbing cotton, 31 - left and right side noise reduction plate sound-absorbing cotton, 32 - air cabinet outer plate, 33 - air cabinet front plate, 34 - air cabinet top plate, 35 - fan smoke suction cavity, 36 - positioning plate, 37 - front noise reduction plate air outlet, 38 - air cabinet smoke exhaust port, 39 - noise reduction air inlet, 40 - baffle plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will describe the specific embodiments of the present utility model in detail with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0029] The following further describes the present utility model with reference to the accompanying drawings and embodiments.

[0030] See Figures 1-6 , the range hood with a blower cabinet noise reduction includes a blower cabinet provided on the range hood main body 1, and an upper volute blower assembly 2 and a noise reduction box assembly 3 are provided in the blower cabinet; the noise reduction box assembly 3 is located behind the upper volute blower assembly 2 and is provided with a noise reduction device thereon.

[0031] In this embodiment, the upper volute blower assembly 2 is used to form a negative pressure inside the blower cabinet, so that the oil fume airflow inside the range hood main body 1 can be sucked into the noise reduction box assembly 3. Since the upper volute blower assembly 2 is located in front of the noise reduction box assembly 3, and at the same time the noise reduction box assembly 3 is provided with a noise reduction device, the oil fume airflow can be noise-reduced through the noise reduction device and then sucked and discharged by the upper volute blower assembly 2, so as to reduce the noise generated by the oil fume airflow contacting and impacting the upper volute blower assembly 2, thereby effectively reducing the noise when the oil fume airflow flows inside the blower cabinet, and further improving the noise reduction effect of the range hood.

[0032] Specifically, the noise reduction box assembly 3 includes, but is not limited to, a triangular, polygonal, circular, elliptical, or a combined shape thereof, and is integrally formed or composed of a plurality of split members spliced together, and a noise reduction device is provided at its whole or partial position.

[0033] The noise reduction device includes noise reduction through holes 22 and / or sound-absorbing cotton.

[0034] The noise reduction through holes 22 include, but are not limited to, a triangular, polygonal, circular, elliptical, or a combined shape thereof.

[0035] The diameter of the noise reduction through holes 22 is 2 - 3 mm, and the center distance between adjacent noise reduction through holes 22 is 6 mm or more.

[0036] In this embodiment, the preferred noise reduction through holes 22 are circular, with a diameter of 2.5 mm, and the center distance between adjacent noise reduction through holes 22 is 8 mm.

[0037] In this embodiment, the noise reduction box assembly 3 includes a front noise reduction plate 23, a rear noise reduction plate 24, a top noise reduction plate 25, and left and right side noise reduction plates 26.

[0038] A noise reduction device composed of noise reduction through holes 22 and / or sound-absorbing cotton is provided on the front noise reduction plate 23, rear noise reduction plate 24, top noise reduction plate 25, and left and right side noise reduction plates 26.

[0039] Specifically, a number of noise reduction through holes 22 are respectively provided at the overall or partial positions of the front noise reduction plate 23, rear noise reduction plate 24, top noise reduction plate 25, and / or left and right side noise reduction plates 26.

[0040] That is, the box body noise reduction through holes 22 can be provided on the entire front noise reduction plate 23, rear noise reduction plate 24, top noise reduction plate 25, and / or left and right side noise reduction plates 26, or only at the partial positions on the front noise reduction plate 23, rear noise reduction plate 24, top noise reduction plate 25, and / or left and right side noise reduction plates 26. And when the box body noise reduction through holes 22 are provided at the partial positions, their positions are not restricted.

[0041] The front noise reduction plate 23, rear noise reduction plate 24, top noise reduction plate 25, and left and right side noise reduction plates 26 are made of sheet metal materials.

[0042] The front noise reduction plate 23 and the rear noise reduction plate 24 face each other front and back and are arranged at intervals; the top noise reduction plate 25 is arranged at the top between the front noise reduction plate 23 and the rear noise reduction plate 24; the left and right side noise reduction plates 26 are arranged on the left and right sides between the front noise reduction plate 23 and the rear noise reduction plate 24.

[0043] In this embodiment, the noise reduction box assembly 3 can be integrally provided, that is, the front noise reduction plate 23, rear noise reduction plate 24, top noise reduction plate 25, and left and right side noise reduction plates 26 are integrally formed to form the overall noise reduction box assembly 3.

[0044] In addition, the noise reduction box assembly 3 can also be spliced, that is, the front noise reduction plate 23, rear noise reduction plate 24, top noise reduction plate 25, and left and right side noise reduction plates 26 are independently provided and welded to each other to form the spliced noise reduction box assembly 3.

[0045] Furthermore, a front noise reduction plate sound-absorbing cotton 28 is provided at the overall or partial position on the outside of the front noise reduction plate 23, a rear noise reduction plate sound-absorbing cotton 29 is provided at the overall or partial position on the outside of the rear noise reduction plate 24, a top noise reduction plate sound-absorbing cotton 30 is provided at the overall or partial position on the outside of the top noise reduction plate 25, and / or a left and right side noise reduction plate sound-absorbing cotton 31 is provided at the overall or partial position on the outside of the left and right side noise reduction plates 26.

[0046] That is, the front noise reduction board sound-absorbing cotton 28, the rear noise reduction board sound-absorbing cotton 19, the top noise reduction board sound-absorbing cotton 30, and the left and right side noise reduction board sound-absorbing cotton 31 can be respectively arranged on the outer sides of the entire front noise reduction board 23, the rear noise reduction board 24, the top noise reduction board 25, and the left and right side noise reduction boards 26, or can be arranged only at local positions on the outer sides of the front noise reduction board 23, the rear noise reduction board 24, the top noise reduction board 25, and the left and right side noise reduction boards 26. And when the front noise reduction board sound-absorbing cotton 28, the rear noise reduction board sound-absorbing cotton 19, the top noise reduction board sound-absorbing cotton 30, and the left and right side noise reduction board sound-absorbing cotton 31 are arranged at local positions, their positions are not restricted.

[0047] The flue gas airflow flowing on the front noise reduction board 23, the rear noise reduction board 24, the top noise reduction board 25, and the left and right side noise reduction boards 26 is cut by the box body noise reduction through holes 22, so as to reduce the noise generated by the contact and impact of the flue gas airflow with the front noise reduction board 23, the rear noise reduction board 24, the top noise reduction board 25, and the left and right side noise reduction boards 26, as well as the retention problem caused by the blockage of the flue gas airflow, thereby effectively reducing the wind noise in the noise reduction box assembly 3, and at the same time improving the flowing performance of the flue gas airflow in the noise reduction box assembly 3, and further enhancing the smoking effect of the range hood.

[0048] The front noise reduction board sound-absorbing cotton 28, the rear noise reduction board sound-absorbing cotton 19, the top noise reduction board sound-absorbing cotton 30, and the left and right side noise reduction board sound-absorbing cotton 31 can effectively absorb the noise formed when the flue gas airflow contacts the front noise reduction board 23, the rear noise reduction board 24, the top noise reduction board 25, and the left and right side noise reduction boards 26, so that the sound waves on the front noise reduction board 23, the rear noise reduction board 24, the top noise reduction board 25, and the left and right side noise reduction boards 26 can be reflected back and forth on the front noise reduction board sound-absorbing cotton 28, the rear noise reduction board sound-absorbing cotton 19, the top noise reduction board sound-absorbing cotton 30, and the left and right side noise reduction board sound-absorbing cotton 31 at different positions to achieve the noise reduction and sound absorption effects, thereby greatly reducing the noise generated by the range hood during operation, and further enhancing the overall noise reduction effect of the range hood.

[0049] And the setting of the front noise reduction board sound-absorbing cotton 28, the rear noise reduction board sound-absorbing cotton 19, the top noise reduction board sound-absorbing cotton 30, and the left and right side noise reduction board sound-absorbing cotton 31 can also effectively solve the problem of smoke leakage caused by the box body noise reduction through holes 22, so as to avoid the phenomenon of the flue gas airflow flowing outwards.

[0050] A noise reduction smoke collecting cavity 27 is formed between the front noise reduction board 23, the rear noise reduction board 24, the top noise reduction board 25, and the left and right side noise reduction boards 26.

[0051] A fan smoking cavity 35 is also arranged in the air cabinet, and the fan smoking cavity 35 is located on the front side of the noise reduction smoke collecting cavity 27; the upper volute fan assembly 2 is located in the fan smoking cavity 35.

[0052] The front noise reduction board 23, the rear noise reduction board 24, the top noise reduction board 25, and / or the left and right side noise reduction boards 26 are inclined towards the direction of the fan smoking cavity 35.

[0053] In this embodiment, the front noise reduction plate 23, the rear noise reduction plate 24, and the left and right side noise reduction plates 26 are respectively arranged vertically, and the top noise reduction plate 25 is inclined towards the direction of the fan smoke suction cavity 35, so that the oil fume airflow can flow in the direction of the fan smoke suction cavity 35, further accelerating the flow speed of the oil fume airflow.

[0054] A noise reduction air inlet 39 is arranged between the bottoms of the left and right side noise reduction plates 26, the front noise reduction plate 23, and the rear noise reduction plate 24; a front noise reduction plate air outlet 37 is arranged on the front noise reduction plate 23; a casing exhaust port 20 is arranged at the top of the range hood main body 1; a wind cabinet exhaust port 38 is arranged at the top of the fan smoke suction cavity 35; a fan air inlet 4 is arranged on the side of the upper volute fan assembly 2, and a fan air outlet 5 is arranged at the top.

[0055] The noise reduction air inlet 39 is communicated with the casing exhaust port 20; the fan air inlet 4 is communicated with the front noise reduction plate air outlet 37; the fan air outlet 5 is communicated with the wind cabinet exhaust port 38.

[0056] In this embodiment, the upper wind cabinet includes a wind cabinet outer plate 32, a wind cabinet front plate 33, and a wind cabinet top plate 34; the wind cabinet front plate 33 is fixedly arranged on the front side of the wind cabinet outer plate 32; the wind cabinet top plate 34 is fixedly arranged on the tops of the wind cabinet outer plate 32 and the wind cabinet front plate 33.

[0057] Among them, the wind cabinet outer plate 32, the wind cabinet front plate 33, and the wind cabinet top plate 34 are made of sheet metal materials.

[0058] The upper wind cabinet can be integrally arranged or assembled, and its setting method is the same as that of the noise reduction box assembly 3, which will not be elaborated here.

[0059] In order to obtain a better noise reduction effect, the front noise reduction plate sound-absorbing cotton 28 is attached between the front noise reduction plate 23 and the upper volute fan assembly 2, and / or the rear noise reduction plate sound-absorbing cotton 29 is attached between the rear noise reduction plate 24 and the inner back wall of the wind cabinet outer plate 32, and / or the top noise reduction plate sound-absorbing cotton 30 is attached between the top noise reduction plate 25 and the wind cabinet top plate 34, and / or the left and right side noise reduction plate sound-absorbing cotton 31 is attached between the left and right inner walls of the wind cabinet outer plate 32.

[0060] Specifically, the front noise reduction plate sound-absorbing cotton 28 is attached between the front noise reduction plate 23 and the upper volute fan assembly 2, the rear noise reduction plate sound-absorbing cotton 29 is attached between the rear noise reduction plate 24 and the inner back wall of the wind cabinet outer plate 32, the left and right side noise reduction plate sound-absorbing cotton 31 is attached between the left and right inner walls of the wind cabinet outer plate 32, and the top noise reduction plate sound-absorbing cotton 30 is attached to the top noise reduction plate 25.

[0061] Through the settings of the front noise reduction board sound-absorbing cotton 28, rear noise reduction board sound-absorbing cotton 29, top noise reduction board sound-absorbing cotton 30, and left and right side noise reduction board sound-absorbing cotton 31, the noise transmitted between the front noise reduction board 23 and the upper volute fan assembly 2, between the rear noise reduction board 24 and the inner back wall of the air handling unit outer panel 32, between the left and right inner walls of the air handling unit outer panel 32, and on the top noise reduction board 25 can be effectively absorbed. Moreover, the front noise reduction board sound-absorbing cotton 28, rear noise reduction board sound-absorbing cotton 29, top noise reduction board sound-absorbing cotton 30, and left and right side noise reduction board sound-absorbing cotton 31 can also play a role in shock absorption and buffering to avoid the vibration problems that occur when the range hood is in use.

[0062] In order to improve the stability of the setting of the front noise reduction board sound-absorbing cotton 28, a positioning plate 36 is fixedly arranged on the rear noise reduction board 24; the front noise reduction board sound-absorbing cotton 28 is positioned on the positioning plate 36.

[0063] In this embodiment, the front noise reduction board sound-absorbing cotton 28 is provided with a front noise reduction board sound-absorbing cotton avoidance opening corresponding to the front noise reduction board air outlet 37, so as to facilitate the upper volute fan assembly 2 to extract the oil fume in the noise reduction smoke collecting cavity 27.

[0064] When the upper volute fan assembly 2 is working, it can create a negative pressure in the fan smoke suction cavity 35 and the noise reduction smoke collecting cavity 27, and make the oil fume in the range hood main body 1 enter the noise reduction smoke collecting cavity 27 through the machine shell smoke outlet 20 and the noise reduction air inlet 39 in sequence. The oil fume located in the noise reduction smoke collecting cavity 27 then enters the fan smoke suction cavity 35 through the front noise reduction board air outlet 37. Finally, the oil fume located in the fan smoke suction cavity 35 is discharged outside the upper air handling unit through the air handling unit smoke outlet 38 under the action of the upper volute fan assembly 2 to achieve the suction and discharge of the oil fume.

[0065] The above is the preferred solution of the present invention, which shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A range hood with a noise-reducing air cabinet, comprising an air cabinet arranged on the range hood main body, characterized in that: An upper volute fan assembly and a noise reduction box assembly are provided inside the air handling unit; the noise reduction box assembly is located at the rear side of the upper volute fan assembly, and a noise reduction device is provided thereon. The noise reduction box assembly includes a front noise reduction plate, a rear noise reduction plate, a top noise reduction plate, and left and right side noise reduction plates. The noise reduction device composed of noise reduction through holes and / or sound-absorbing cotton is provided on the front noise reduction plate, the rear noise reduction plate, the top noise reduction plate, and the left and right side noise reduction plates.

2. The range hood with a blower cabinet for noise reduction according to claim 1, wherein: The noise reduction box assembly includes a polygon, a circle, or a combined shape thereof, and is integrally formed or spliced by a plurality of split members, and the noise reduction device is provided at the whole or partial position thereof.

3. The range hood with a blower cabinet for noise reduction according to claim 1, wherein: The noise reduction through holes include a polygon, a circle, or a combined shape thereof.

4. The range hood with a blower cabinet for noise reduction according to claim 3, wherein: The diameter of the noise reduction through holes is 2-3 mm, and the center distance between adjacent noise reduction through holes is more than 6 mm.

5. The range hood with a blower cabinet for noise reduction according to claim 4, wherein: A plurality of the noise reduction through holes are respectively provided at the whole or partial position of the front noise reduction plate, the rear noise reduction plate, the top noise reduction plate, and / or the left and right side noise reduction plates.

6. The range hood with a blower cabinet for noise reduction according to claim 5, wherein: Sound-absorbing cotton for the front noise reduction plate is provided at the whole or partial position on the outer side of the front noise reduction plate, sound-absorbing cotton for the rear noise reduction plate is provided at the whole or partial position on the outer side of the rear noise reduction plate, sound-absorbing cotton for the top noise reduction plate is provided at the whole or partial position on the outer side of the top noise reduction plate, and / or sound-absorbing cotton for the left and right side noise reduction plates is provided at the whole or partial position on the outer side of the left and right side noise reduction plates.

7. The range hood with a blower noise reduction according to claim 5, characterized in that: A noise reduction smoke collecting cavity is formed between the front noise reduction plate, the rear noise reduction plate, the top noise reduction plate, and the left and right side noise reduction plates. A fan smoke suction cavity is further provided inside the air handling unit, and the fan smoke suction cavity is located at the front side of the noise reduction smoke collecting cavity; the upper volute fan assembly is located inside the fan smoke suction cavity. The front noise reduction plate, the rear noise reduction plate, the top noise reduction plate, and / or the left and right side noise reduction plates are inclined in the direction of the fan smoke suction cavity.

8. The range hood with a blower noise reduction according to claim 7, characterized in that: A noise reduction air inlet is provided between the bottoms of the left and right side noise reduction plates, the front noise reduction plate, and the rear noise reduction plate; a front noise reduction plate air outlet is provided on the front noise reduction plate; a casing smoke exhaust port is provided at the top of the smoke machine main body; a wind cabinet smoke exhaust port is provided at the top of the fan smoke suction cavity; a fan air inlet is provided at the side of the upper volute fan assembly, and a fan air outlet is provided at the top. The noise reduction air inlet is communicated with the casing smoke exhaust port; the fan air inlet is communicated with the front noise reduction plate air outlet; the fan air outlet is communicated with the wind cabinet smoke exhaust port.

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