A smoke machine

Abstract

The present application discloses a range hood, comprising a range hood frame, a fan assembly and a noise reduction assembly, wherein the range hood frame is formed with a receiving cavity and an air inlet connected to the receiving cavity, the air inlet and the top wall of the receiving cavity are arranged oppositely; the fan assembly is arranged in the receiving cavity, located between the air inlet and the top wall of the receiving cavity; the fan assembly comprises an air exhaust port; the noise reduction assembly is arranged in the receiving cavity, the noise reduction assembly is formed with a noise reduction structure, and the noise reduction structure is located between the air exhaust port of the fan assembly and the top wall of the receiving cavity in the air inlet direction of the air inlet. The range hood of the present application can improve the noise reduction effect.

Description

Technical Field

[0001] The present application relates to the field of household appliances, and in particular to a range hood. Background Art

[0002] The range hood is a household appliance that purifies the kitchen environment. It can quickly absorb the exhaust gas from combustion and the fumes that are harmful to the human body during cooking and discharge them outdoors, thus purifying the air in the kitchen environment. During the smoking process of some existing range hoods, part of the airflow directly hits the top of the range hood, resulting in a loud noise from the airflow, which affects the user's use. Summary of the invention

[0003] The present application provides a range hood to solve the problem that during smoking in some existing range hoods, part of the airflow directly hits the top of the range hood, causing the airflow to generate a lot of noise, affecting the user's use.

[0004] In order to solve the above-mentioned technical problems, the present application proposes a range hood, comprising: a range hood frame, formed with a accommodating cavity and an air inlet connected to the accommodating cavity, the air inlet and the top wall of the accommodating cavity being arranged opposite to each other; a fan assembly, arranged in the accommodating cavity, located between the air inlet and the top wall of the accommodating cavity; the fan assembly includes an exhaust port; a noise reduction assembly, arranged in the accommodating cavity, the noise reduction assembly is formed with a noise reduction structure, and the noise reduction structure is located between the exhaust port of the fan assembly and the top wall of the accommodating cavity in the air inlet direction of the air inlet.

[0005] Among them, the fan assembly and the top wall of the accommodating cavity form an air guide channel, and the noise reduction assembly is located between the air guide channel and the air exhaust port.

[0006] Among them, the range hood frame includes a front cover plate, a back plate, a top plate connecting the front cover plate and the back plate, and two side plates connecting the front cover plate, the back plate and the top plate; the air intake port of the fan assembly is arranged opposite to the front cover plate, the noise reduction assembly abuts against the two side plates, and the noise reduction assembly abuts against the front cover plate and / or the top plate to divide the accommodating cavity into two areas connected by the noise reduction structure.

[0007] The noise reduction component includes at least one noise reduction plate, and the noise reduction structure is a microporous structure formed on the noise reduction plate.

[0008] The microporous structure includes a plurality of openings, and the opening diameter is greater than or equal to 2 mm and less than or equal to 6 mm.

[0009] The distance between adjacent openings is greater than or equal to 2 mm and less than or equal to 4 mm.

[0010] Wherein, a surface of a first noise reduction plate in at least one noise reduction plate is parallel to a rotation axis of the fan assembly.

[0011] The noise reduction component includes a second noise reduction plate, which is connected between the first noise reduction plate and the top plate and is close to the front cover plate.

[0012] Wherein, the second noise reduction plate is formed with a microporous structure.

[0013] The noise reduction component further includes a sound absorbing material, and the sound absorbing material is arranged on a side of the noise reduction plate facing the top wall of the accommodating cavity.

[0014] The beneficial effects of the present application are as follows: Different from the prior art, the present application provides a range hood including a range hood frame, a fan assembly and a noise reduction assembly, the range hood frame is formed with a accommodating cavity and an air inlet connected to the accommodating cavity, the air inlet and the top wall of the accommodating cavity are arranged opposite to each other; the fan assembly is arranged in the accommodating cavity, located between the air inlet and the top wall of the accommodating cavity, and the fan assembly includes an air exhaust port. The noise reduction assembly is arranged in the accommodating cavity, and the noise reduction assembly is formed with a noise reduction structure, and the noise reduction structure is located between the air exhaust port of the fan assembly and the top wall of the accommodating cavity in the air inlet direction of the air inlet. The noise reduction structure on the noise reduction assembly can reduce part of the airflow that directly hits the top of the range hood frame, thereby reducing airflow disturbance and improving the noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0016] Figure 1 It is a partial schematic diagram of the first embodiment of the range hood of the present application;

[0017] Figure 2 yes Figure 1 A partial schematic diagram of the range hood shown;

[0018] Figure 3 yes Figure 1 A first structural schematic diagram of the noise reduction component shown;

[0019] Figure 4 yes Figure 1 A second structural schematic diagram of the noise reduction component shown;

[0020] Figure 5 yes Figure 1 A third structural schematic diagram of the noise reduction component is shown.

[0021] Figure 6 It is a partial schematic diagram of the second embodiment of the present application;

[0022] Figure 7 yes Figure 6A first structural schematic diagram of the noise reduction component shown;

[0023] Figure 8 yes Figure 6 A second structural schematic diagram of the noise reduction component is shown.

[0024] Figure numbers: 1. range hood frame; 11. accommodating chamber; 12. air inlet; 13. back panel; 14. top panel; 15. side panel; 16. air guide channel; 2. fan assembly; 21. exhaust port; 3. noise reduction assembly; 31. noise reduction plate; 311. first noise reduction plate; 312. second noise reduction plate; 4. microporous structure; 41. opening; 5. fixing plate. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] A range hood provided by the present invention is described in detail below in conjunction with embodiments.

[0029] See also Figure 1 , Figure 1 It is a partial schematic diagram of the first embodiment of the range hood of the present application.

[0030] In this embodiment, the range hood includes a range hood frame 1 and a fan assembly 2. The range hood frame 1 is formed with a receiving chamber 11 and an air inlet 12. The receiving chamber 11 and the air inlet 12 are connected, and the air inlet 12 and the top wall of the receiving chamber 11 are arranged opposite to each other. The fan assembly 2 is arranged in the receiving chamber 11 and is located between the air inlet 12 and the top wall of the receiving chamber 11. The fan assembly 2 includes an air outlet 21, that is, the fan assembly 2 provides power to drive the airflow of oil smoke and the like into the fan assembly 2 through the air inlet 12 and the air outlet 21 and arranged side by side toward the top of the range hood frame 1.

[0031] During the process of airflow entering the fan assembly 2 through the exhaust port 21, part of the airflow directly hits the top of the range hood frame 1 and generates some noise. The airflow that hits the top of the range hood frame 1 rebounds and re-enters the fan assembly 2, increasing the airflow disturbance and further generating noise. Therefore, the range hood in this embodiment includes a noise reduction component 3, which is arranged in the accommodating chamber 11, and the noise reduction component 3 is formed with a noise reduction structure (not shown in the figure). The noise reduction structure is arranged in the air inlet direction of the air inlet 12, and the noise reduction structure is located between the exhaust port 21 and the top wall of the accommodating chamber 11. The noise reduction structure on the noise reduction component 3 eliminates the airflow that directly hits the top of the range hood frame 1, so that the airflow is directly sucked into the fan assembly 2, reducing the airflow disturbance, reducing the noise, and thus improving the noise reduction effect.

[0032] Since the noise reduction component 3 is in the air inlet direction of the air inlet 12, that is, the noise reduction structure in the noise reduction component 3 can be set perpendicular to the air inlet direction of the air inlet 12, or can be set obliquely to the air inlet direction of the air inlet 12. Therefore, the specific setting angle of the noise reduction structure in the noise reduction component 3 is not limited.

[0033] See also Figure 2 , Figure 2 yes Figure 1 The partial schematic diagram of the range hood shown. Figure 1 In addition, in order to increase the amount of oil smoke, some existing range hoods adopt a double air intake structure at the front and rear sides of the fan assembly 2. However, since the fan assembly 2 is installed in the accommodating chamber 11 of the range hood frame 1, a connecting area is formed between the fan assembly 2 and the top wall of the accommodating chamber 11. The connecting area can connect the air intake at the front and rear sides of the fan assembly 2, so that the airflow at the front and rear sides of the fan assembly 2 collides and disturbs each other in the above-mentioned connecting area, thereby generating certain noise.

[0034] In order to solve the above problem, the connecting area in this embodiment is defined as the air guide channel 16, wherein the noise reduction component 3 is located between the air guide channel 16 and the air outlet 21. That is, the noise reduction component 3 not only eliminates the airflow on the front side of the fan component 2 from directly hitting the top of the range hood frame 1, thereby reducing the noise; it also eliminates the airflow on the front side of the fan component 2 from entering the air guide channel 16, thereby blocking the airflow on the front side of the fan component 2 and the airflow on the rear side of the fan component 2 from colliding with each other in the air guide channel 16, thereby reducing the noise.

[0035] In one embodiment, the range hood frame 1 includes a front cover plate (not shown in the figure), a back plate 13, a top plate 14 and two side plates 15, the top plate 14 connects the front cover plate and the back plate 13, and the side plates 15 connect the front cover plate, the back plate 13 and the top plate 14 respectively; wherein the air outlet 21 of the fan assembly 2 is arranged opposite to the front cover plate. The above-mentioned noise reduction assembly 3 abuts against the two side plates 15 to install the noise reduction assembly 3 in the range hood frame 1, and increases the airflow blocking area to further reduce the airflow directly hitting the top plate 14.

[0036] In addition, the noise reduction component 3 can only abut against the front cover plate, or only abut against the top plate 14, or abut against the front cover plate and the top plate 14 at the same time, so as to divide the accommodating chamber 11 into two areas connected by the noise reduction structure, thereby blocking the airflow in front of the fan assembly 2 and the airflow in the rear of the fan assembly 2 from colliding and disturbing each other in the air guide channel 16, thereby reducing noise. At the same time, when the noise reduction component 3 abuts against the front cover plate and / or the top plate 14, it can prevent the airflow from leaking through the gap due to the gap between the noise reduction component 3 and the front cover plate or the top plate 14, thereby reducing the noise reduction effect.

[0037] See also Figure 3 , Figure 4 and Figure 5 , Figure 3 yes Figure 1 A first structural schematic diagram of the noise reduction component shown; Figure 4 yes Figure 1 A second structural schematic diagram of the noise reduction component shown; Figure 5 yes Figure 1 A third structural schematic diagram of the noise reduction component is shown.

[0038] Specifically, the noise reduction component 3 includes at least one noise reduction plate 31, and the number of the noise reduction plates 31 can be one, two or more, and the number can be determined according to actual conditions. The noise reduction structure formed by the noise reduction component 3 is a microporous structure 4, and the microporous structure 4 is formed on the noise reduction plate 31 to reduce the noise generated by the airflow on the front side of the fan component 2 through the microporous structure 4.

[0039] The microporous structure 4 includes a plurality of openings 41, through which the noise generated by the airflow is reduced. The diameter of the opening 41 may be greater than or equal to 2 mm and less than or equal to 6 mm. The range of the opening 41 can improve the efficiency of the noise reduction process. Optionally, the diameter of the opening 41 may be 2 mm, 3 mm, 5 mm, 6 mm, etc.

[0040] In addition, the minimum distance between the adjacent openings 41 can be greater than or equal to 2 mm and less than or equal to 4 mm. The minimum distance between the adjacent openings 41 can improve the noise reduction processing efficiency. Optionally, the distance between the adjacent openings 41 can be 2 mm, 2.5 mm, 3 mm, 4 mm, etc.

[0041] The characteristics of the openings 41 of the noise reduction plate 31 mentioned above involve the shape of the openings 41, the density of the openings 41, and the area of ​​the openings 41 per unit area. The shape of the openings 41 can be any shape, such as a circle, an ellipse, etc. The openings 41 on the noise reduction plate 31 can be arranged evenly or unevenly. When the openings 41 on the noise reduction plate 31 are unevenly arranged, the area of ​​the openings 41 per unit area on the noise reduction plate 31 is different. The different areas of the openings 41 per unit area may be related only to the size of the openings 41, or only to the density of the openings 41, or to both the size of the openings 41 and the density of the openings 41.

[0042] For example, when the opening 41 is larger, the area of ​​the opening 41 per unit area is larger; otherwise, the area of ​​the opening 41 per unit area is smaller. When the density of the opening 41 is larger, the area of ​​the opening 41 per unit area is larger; otherwise, the area of ​​the opening 41 per unit area is smaller. Similarly, when the size of the opening 41 and the area of ​​the opening 41 are both larger, the area of ​​the opening 41 per unit area is larger.

[0043] Combination Figure 1 , see Figure 6 , Figure 7 and Figure 8 , Figure 6 It is a partial schematic diagram of the second embodiment of the present application; Figure 7 yes Figure 6 A first structural schematic diagram of the noise reduction component shown; Figure 8 yes Figure 6 The second structural schematic diagram of the noise reduction component is shown. In order to describe in detail the specific structure of the noise reduction component 3 including at least one noise reduction plate 31, in this embodiment, at least one noise reduction plate 31 includes a first noise reduction plate 311, and the noise reduction structure in the first noise reduction plate 311 is arranged in the air inlet direction of the air inlet 12. In order to reduce the collision of the airflow on the front side of the fan assembly 2 with the first noise reduction plate 311 and improve the noise reduction effect, the surface of the first noise reduction plate 311 can be arranged parallel to the rotation axis of the fan assembly 2 to improve the noise reduction effect.

[0044] like Figure 2 As shown, since the smoke outlet of the fan assembly 2 (not shown in the figure) is located on the left side of the range hood frame 1, a larger air guide channel 16 is formed between the fan assembly 2 and the right end of the top plate 14 and the right side plate 15 of the range hood frame 1. Since the contour of the fan assembly 2 is set in an arc shape, the end of the air guide channel 16 close to the fan assembly 2 is set in an arc shape. Therefore, when the first noise reduction plate 311 is located between the air guide channel 16 and the air outlet 21, in order to completely divide the accommodating cavity 11 into two areas connected by the noise reduction structure, the shape of the first noise reduction plate 311 here is set as much as possible in the same shape as the lower part of the air guide channel 16, so as to completely block the airflow on the front side of the fan assembly 2 from entering the air guide channel 16.

[0045] In the actual process, considering the processing technology and noise reduction effect, such as Figure 1 and Figure 6 As shown, in this embodiment, the first noise reduction plate 311 is inclined at one end of the air guide channel 16 close to the top plate 14 and the right side plate 15, which is not only used to completely block the airflow on the front side of the fan assembly 2 from entering the air guide channel 16, but also avoids blocking the exhaust port 21 and affecting the fan assembly 2 from extracting oil fumes.

[0046] Because the smoke outlet of the fan assembly 2 is located on the left side of the range hood frame 1, there is also a small air guide channel 16 between the fan assembly 2 and the left end of the top and left side panels 15 of the range hood frame 1. In order to further improve the noise reduction effect of the range hood, the first noise reduction plate 311 can be extended to the small air guide channel 16, so as to abut against the left side panel 15.

[0047] The shape of the left end of the first noise reduction plate 311 can be symmetrical with the shape of the right end of the first noise reduction plate 311, and both are inclined. Of course, the shape of the left end of the first noise reduction plate 311 can be different from the shape of the right end of the first noise reduction plate 311.

[0048] When the shape of the left end of the first noise reduction plate 311 is symmetrical to the shape of the right end of the first noise reduction plate 311, the two ends of the middle of the first noise reduction plate 311 are respectively connected to the left end of the first noise reduction plate 311 and the right end of the first noise reduction plate 311, so that the first noise reduction plate 311 is similar to half a "dumbbell". Figure 3 , 4 As shown in 5.

[0049] Since the air guide channel 16 formed between the fan assembly 2 and the side panels 15 on the left and the top of the range hood frame 1 is smaller than the air guide channel 16 between the fan assembly 2 and the side panels 15 on the right and the top of the range hood frame 1, the shape of the left end of the first noise reduction plate 311 can be set to be different from the shape of the right end of the first noise reduction plate 311. Figure 7As shown in FIG8 , the left side of the right end of the first noise reduction plate 311 directly extends and abuts against the left side plate 15 , so that the first noise reduction plate 311 is similar to an “L” shape.

[0050] Therefore, the shape of the first noise reduction plate 311 can be different. Of course, the shape of the first noise reduction plate 311 is not limited to the above two shapes, and can also be other shapes, which are not limited here. The above first noise reduction plate 311 is arranged between the air outlet 21 and the top plate 14 to prevent the first noise reduction plate 311 from blocking the air outlet 21 and affecting the effect of the fan assembly 2 in extracting oil smoke.

[0051] In an alternative embodiment, when the first noise reduction plate 311 is disposed between the air outlet 21 and the top plate 14, the noise reduction effect is reduced in order to prevent the airflow on the front side of the fan assembly 2 from entering from the gap between the first noise reduction plate 311 and the front cover plate or the top plate 14. When only the first noise reduction plate 311 is disposed in the noise reduction assembly 3, the first noise reduction plate 311 needs to be abutted against the front cover plate, or the top plate 14, or the front cover plate and the top plate 14 to reduce air leakage, thereby improving the noise reduction effect of the range hood. In this embodiment, the first noise reduction plate 311 abuts against the front cover plate, and is vertically disposed between the air outlet 21 and the front cover plate, and both ends of the first noise reduction plate 311 are abutted and installed on the side panels 15 on both sides.

[0052] In one embodiment, if Figure 1 , Figure 3 , Figure 5 , Figure 6 and Figure 7 , the noise reduction component 3 also includes a second noise reduction plate 312, and the second noise reduction plate 312 is close to the front cover. The second noise reduction plate 312 is respectively connected between the first noise reduction plate 311 and the top plate 14, which can prevent the airflow on the front side of the fan assembly 2 from passing through the gap between the first noise reduction plate 311 and the front cover or the top plate 14, and colliding with the airflow on the rear side of the fan assembly 2, so as to block the airflow on the front side of the fan assembly 2. When the noise reduction component 3 is provided with the second noise reduction plate 312, the first noise reduction plate 311 does not need to abut on the front cover, and is respectively connected to the first noise reduction plate 311 and the top plate 14 through the second noise reduction plate 312, thereby improving the noise reduction effect of the range hood. Of course, in the actual process, in order to reduce the airflow on the front side of the fan assembly 2 from entering the gap between the second noise reduction plate 312 and the front cover, the second noise reduction plate 312 can be set close to the front cover to reduce noise formation.

[0053] The second noise reduction plate 312 may be provided with a microporous structure 4 or may not be provided with a microporous structure 4. When the second noise reduction plate 312 is not provided with a microporous structure 4, as Figure 5 As shown, it is only used to block the airflow in front of the fan assembly 2 .

[0054] When the second noise reduction plate 312 is provided with a microporous structure 4, as Figure 3 and Figure 7 As shown, the second noise reduction plate 312 can not only block the airflow in front of the fan assembly 2, but also play a partial noise reduction role to further improve the noise reduction effect. The specific structure of the microporous structure 4 is the same or similar to the microporous structure 4 in the first noise reduction plate 311 in the above embodiment, and will not be repeated here.

[0055] In one embodiment, in combination Figure 3 , Figure 5 and Figure 7 The range hood further comprises a fixing plate 5, which is respectively arranged at both ends of the first noise reduction plate 311 and the second noise reduction plate 312 to improve the overall stability of the noise reduction assembly 3 and reduce the shaking of the noise reduction assembly 3 during use. The noise reduction assembly 3 can be installed in the range hood frame 1 through the fixing plate 5 and / or the first noise reduction plate 311 and / or the second noise reduction plate 312.

[0056] For example, the fixing plate 5, the first noise reduction plate 311 and the second noise reduction plate 312 can be detachably installed in the range hood frame 1 through a mounting member (not shown in the figure). The mounting member can be a screw, that is, the fixing plate 5 and / or the noise reduction component 3 are installed in the range hood frame 1 through the screw thread, which is convenient for installation and removal. The mounting member can be a clamping structure, a part of the clamping structure is arranged on the range hood frame 1, and the other part is arranged on the fixing plate 5 and / or the noise reduction component 3, and the two are clamped by the clamping structure, which is convenient for installation and maintenance.

[0057] In one embodiment, the noise reduction component 3 further includes a sound absorbing material (not shown in the figure), which has a sound absorbing effect. The sound absorbing material is arranged on the side of the noise reduction plate 31 facing the top wall of the accommodating cavity 11 to further absorb noise, thereby further improving the noise reduction effect of the range hood.

[0058] The above-mentioned sound absorbing material can be bonded or fixed to the side of the noise reduction plate 31 facing the top wall of the accommodating cavity 11. The sound absorbing material can be sound absorbing cotton (not shown in the figure), etc., which is bonded to the noise reduction plate 31 to absorb noise.

[0059] Compared with the prior art, the range hood of this embodiment includes a range hood frame, a fan assembly and a noise reduction assembly. The range hood frame is formed with a receiving cavity and an air inlet connected to the receiving cavity, and the air inlet and the top wall of the receiving cavity are arranged opposite to each other. The fan assembly is arranged in the receiving cavity, located between the air inlet and the top wall of the receiving cavity, and the fan assembly includes an air exhaust port. The noise reduction assembly is arranged in the receiving cavity, and the noise reduction assembly is formed with a noise reduction structure, which is located in the air inlet direction of the air inlet, between the air exhaust port of the fan assembly and the top wall of the receiving cavity. The noise reduction structure on the noise reduction assembly can reduce part of the airflow and eliminate the collision with the top of the range hood frame, thereby reducing airflow disturbance and improving the noise reduction effect.

[0060] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A range hood, characterized in that: include: The range hood frame is formed with a receiving cavity and an air inlet connected to the receiving cavity, and the air inlet and the top wall of the receiving cavity are arranged opposite to each other; A fan assembly is arranged in the accommodating cavity and is located between the air inlet and the top wall of the accommodating cavity; the fan assembly includes an air exhaust port; A noise reduction component is disposed in the accommodating cavity, wherein the noise reduction component is formed with a noise reduction structure, and the noise reduction structure is located between the air outlet of the fan component and the top wall of the accommodating cavity in the air inlet direction of the air inlet; The fan assembly and the top wall of the accommodating cavity form an air guide channel, and the noise reduction assembly is located between the air guide channel and the air outlet; the air guide channel includes a left air guide channel and a right air guide channel, and the size of the left air guide channel is smaller than that of the right air guide channel; The noise reduction assembly includes at least one noise reduction plate, at least one of the noise reduction plates includes a first noise reduction plate, two ends of a middle portion of the first noise reduction plate are respectively connected to a left end of the first noise reduction plate and a right end of the first noise reduction plate, the left end of the first noise reduction plate and the right end of the first noise reduction plate are asymmetrical, and a size of the left end of the first noise reduction plate is smaller than a size of the right end of the first noise reduction plate, so that the left end of the first noise reduction plate extends to the left air guide channel, and the right end of the first noise reduction plate extends to the right air guide channel; Wherein, the left end, the middle end and the right end of the first noise reduction plate are all arranged in a plane shape, the right end of the first noise reduction plate is arranged to be tilted downward, and the first noise reduction plate is arranged in an L shape; The range hood frame includes a front cover plate, a back plate, a top plate connecting the front cover plate and the back plate, and two side plates connecting the front cover plate, the back plate and the top plate; the air inlet of the fan assembly is arranged opposite to the front cover plate, the noise reduction assembly abuts against the two side plates, and the noise reduction assembly abuts against the front cover plate and / or the top plate, so as to divide the accommodating cavity into two areas connected by the noise reduction structure; The first noise reduction plate is in contact with the front cover plate, and is vertically arranged between the air outlet and the front cover plate. Both ends of the first noise reduction plate are in contact with and installed on the two side plates. The left side of the top plate, the left side plate, and the fan assembly form the left air guide channel, and the top plate, the right side plate, and the fan assembly form the right air guide channel. The noise reduction structure is a microporous structure formed on the noise reduction plate; the microporous structure includes a plurality of openings, the diameter of the openings is greater than or equal to 2 mm and less than or equal to 6 mm; the distance between adjacent openings is greater than or equal to 2 mm and less than or equal to 4 mm; The noise reduction assembly includes a second noise reduction plate, which is connected between the first noise reduction plate and the top plate and is close to the front cover plate.

2. The range hood according to claim 1, characterized in that: A surface of a first noise reduction plate among the at least one noise reduction plate is parallel to a rotation axis of the fan assembly.

3. The range hood according to claim 1, characterized in that: The second noise reduction plate is formed with the microporous structure.

4. The range hood according to any one of claims 1 to 3, characterized in that: The noise reduction component further includes a sound absorbing material, and the sound absorbing material is arranged on a side of the noise reduction plate facing the top wall of the accommodating cavity.

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