Shell assembly and range hood

Abstract

The shell assembly comprises a smoke collecting shell, a flue shell and a fan shell, the smoke collecting shell is provided with a smoke collecting cavity, the flue shell comprises a bottom channel, a middle channel and a top channel which are sequentially connected and communicated, the bottom channel is connected with the smoke collecting shell and communicated with the smoke collecting cavity, and the middle channel is communicated with the top channel. The bottom channel can ascend and descend relative to the middle channel, and / or the middle channel can ascend and descend relative to the top channel so as to adjust the height of the smoke collecting shell, the fan shell is connected with the top channel and is provided with a fan cavity communicated with the top channel, and the fan cavity is used for containing a fan of the extractor hood. The flow area of the top channel and the flow area of the bottom channel are both larger than the flow area of the middle channel. According to the technical scheme, the noise generated in the operation process of the range hood can be reduced, and the use experience of a user is improved.

Description

Technical Field

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

[0002] A range hood is an appliance installed above a kitchen stove. It can quickly extract the waste from stove combustion and the fumes that are harmful to the human body generated during cooking and discharge them outdoors to purify the kitchen environment. However, the range hoods in the related art generate too much noise during operation, resulting in a poor user experience when using the range hoods. Utility Model Content

[0003] The embodiments of the present application provide a shell assembly and a range hood, which can reduce the noise generated during the operation of the range hood and improve the user experience.

[0004] In a first aspect, an embodiment of the present application provides a housing assembly, the housing assembly comprising a smoke collecting housing, a flue housing and a fan housing;

[0005] The smoke collecting shell has a smoke collecting cavity, and the flue shell includes a bottom channel, a middle channel and a top channel which are connected and communicated in sequence, the bottom channel is connected to the smoke collecting shell and communicated with the smoke collecting cavity, the bottom channel can be raised and lowered relative to the middle channel, and / or the middle channel can be raised and lowered relative to the top channel, so as to adjust the height of the smoke collecting shell;

[0006] The fan housing is connected to the top channel and has a fan cavity communicated with the top channel, and the fan cavity is used to accommodate the fan of the range hood;

[0007] Wherein, the flow area of ​​the top channel and the flow area of ​​the bottom channel are both larger than the flow area of ​​the middle channel.

[0008] In some embodiments, the bottom channel is fixedly connected to the smoke collecting housing, and the middle channel is fixedly connected to the top channel;

[0009] Wherein, the bottom channel can drive the smoke collecting shell to rise and fall relative to the middle channel.

[0010] In some embodiments, the bottom channel is sleeved on the middle channel and can be raised and lowered relative to the middle channel.

[0011] In some of these embodiments, the housing assembly further includes a lifting drive assembly and a sliding assembly;

[0012] The lifting drive assembly is arranged on the top channel and is transmission-connected with the bottom channel, and the sliding assembly is connected between the outer wall surface of the middle channel and the inner wall surface of the bottom channel;

[0013] Wherein, the sliding assembly is configured to enable the bottom channel to slide relative to the middle channel under the drive of the lifting drive assembly, thereby driving the smoke collecting shell to rise and fall relative to the middle channel.

[0014] In some embodiments, the middle channel passes through the top channel and is fixedly connected to the top channel.

[0015] In some embodiments, the flow area of ​​the intermediate channel is S 中 ;

[0016] Among them, the flow area of ​​the bottom channel is S 底 , meet the conditions: 0.5×S 底 ≤S 中 ≤0.85×S 底 and / or,

[0017] The flow area of ​​the top channel is S 顶 , meet the conditions: 0.5×S 顶 ≤S 中 ≤0.85×S 顶 .

[0018] In some embodiments, the length of the middle channel along the front-to-back direction of the range hood is L 中 ;

[0019] The length of the bottom channel along the front-to-back direction of the range hood is L 底 , meet the conditions: 0.85×L 底 ≤L 中 ≤L 底 and / or,

[0020] The length of the top channel along the front-to-back direction of the range hood is L 顶 , meeting the conditions: 0.68×L 顶 ≤L 中 ≤L 顶 .

[0021] In some embodiments, along the front-to-back direction of the range hood, the total length of the top channel and the fan housing is L1;

[0022] Among them, the condition is met: 0.15×L1≤L 顶 ≤0.4×L1; and / or,

[0023] The length of the fan is L2, which satisfies the condition: 1.5×L2≤L1≤2.5×L2.

[0024] In some embodiments, the middle channel is a hard part, and along the height direction of the range hood, the height of the middle channel is H 中 ;

[0025] Among them, the conditions are met: 50mm≤H 中 ≤150mm.

[0026] In some embodiments, along the height direction of the range hood, the height of the middle channel and the height of the top channel are H and H, respectively. 中 With H 顶 ;

[0027] Among them, the following conditions are met: H 中 ≤H 顶 ≤2.5×H 中 .

[0028] In some embodiments, along the height direction of the range hood, the height of the bottom channel is H 底 ;

[0029] The middle channel is a hard part, and the height along the height direction of the range hood is H. 中 , satisfying the conditions: H 中 ≤H 底 ≤1.5×H 中 ;or,

[0030] The middle channel is a compressible hose, and the height along the height direction of the range hood is H. 中 , meet the conditions: 0.3×H 中 ≤H 底 ≤H 中 .

[0031] In some embodiments, the housing assembly has a flue gas guide duct and further comprises:

[0032] A flow straightener is arranged inside the intermediate channel and connected to the inner wall of the intermediate channel, the flow straightener at least forms a first flow guide section, or the flow straightener and the intermediate channel at least form a first flow guide section together; the flow straightener also forms a second flow guide section, or the flow straightener and the intermediate channel form a second flow guide section together, or a section of the intermediate channel where the flow straightener is not provided is the second flow guide section;

[0033] Wherein, the guide flue comprises the first guide section and the second guide section, the first guide section is connected to the second guide section, and the flow area of ​​the first guide section is larger than the flow area of ​​the second guide section.

[0034] In some of the embodiments, the fairing is arranged on the inner wall of the middle channel, or the fairing is arranged on a part of the inner wall of the middle channel.

[0035] In a second aspect, an embodiment of the present application provides a range hood, which includes a housing assembly and a fan as described above, wherein the fan is accommodated in the fan cavity.

[0036] Based on the housing assembly and the range hood of the embodiment of the present application, the flow area of ​​the top channel and the flow area of ​​the bottom channel are set to be larger than the flow area of ​​the middle channel, and the height of the smoke collecting shell can be adjusted, so that the embodiment has at least the following technical effects:

[0037] First, on the one hand, it is not easy for the noises in the top channel, the middle channel and the bottom channel to resonate with each other, and the probability of the noises in the top channel, the middle channel and the bottom channel being superimposed on each other is reduced, which is beneficial to reducing the intensity of the noises. On the other hand, the top channel and the bottom channel are both formed into regions with relatively large impedances, while the middle channel is formed into a region with relatively small impedances, so that the noises are hindered in the process of propagating from the top channel to the middle channel and from the bottom channel to the middle channel, and the energy of the noises is effectively consumed, thereby helping to weaken the energy of the noises, and reducing the noises generated when the whole range hood is in operation.

[0038] Secondly, when the range hood is working, the smoke collecting shell can be lowered and located below the user's breathing area, so as to prevent the smoke collecting shell from being higher than the user's breathing area and causing the user to inhale oil smoke when collecting smoke. At the same time, it can also reduce the diffusion path of oil smoke and improve the situation of oil smoke escape. After the range hood has finished absorbing oil smoke, the smoke collecting shell can be raised again, so that the smoke collecting shell does not occupy too much space under the kitchen cabinet when the range hood is not in working state. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0040] Figure 1This is a schematic structural diagram of an embodiment of a range hood of the present application;

[0041] Figure 2 for Figure 1 A schematic diagram of the structure of the central range hood when it is in working state;

[0042] Figure 3 for Figure 1 Schematic diagram of the exploded structure of the mid-range hood;

[0043] Figure 4 A cross-sectional schematic diagram of an embodiment of the range hood of the present application from one viewing angle;

[0044] Figure 5 for Figure 4 A cross-sectional schematic diagram of a central range hood from another perspective;

[0045] Figure 6 This is a structural schematic diagram of an embodiment of a flue shell of the present application;

[0046] Figure 7 This is a schematic structural diagram of another embodiment of the flue shell of the present application;

[0047] Figure 8 This is a schematic cross-sectional structure diagram of an embodiment of a range hood of the present application;

[0048] Fig. 9 for Figure 8 Schematic diagram of the connection structure between the middle flue shell and the rectifier.

[0049] Description of Figure Numbers:

[0050] 1. Range hood; 10. Range hood body; 11. Fan assembly; 111. Fan casing; 111A. Fan cavity; 112. Fan; 12. Flue assembly; 12B. Flue guide; 12C. First flow guide section; 12D. Second flow guide section; 121. Flue casing; 1211. Bottom channel; 1212. Middle channel; 1213. Top channel; 122. Regulator; 14. Lifting drive assembly; 15. Sliding assembly; 20. Smoke collecting body; 20A. Smoke collecting cavity; 20B. Inhalation port; 24. Smoke collecting casing; 30. Shell assembly.

[0051] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0052] In order to make the objectives, technical solutions and advantages of the present application clearer, the following part will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings.

[0053] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0054] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0056] Please refer to Figure 1-Figure 2 The embodiment of the present application proposes a range hood 1, which is usually installed above a kitchen stove and can quickly extract waste burned by the stove and fumes harmful to the human body generated during cooking, and discharge them outdoors to purify the kitchen environment.

[0057] Among them, the range hood 1 can be divided into multiple types, common types include top-suction range hoods, side-suction range hoods and cross-over range hoods, and this embodiment does not specifically limit the type of the range hood 1.

[0058] It is understandable that the top suction range hood is also commonly known as the European-style range hood, which is usually installed above the ceiling of the kitchen and sucks the fumes upwards through the suction force of the top. Compared with the top suction range hood, the side suction range hood is closer to the stove and can suck the fumes from the side in time during the cooking process, thereby more effectively preventing the fumes from escaping and also improving the efficiency of absorbing fumes. The crossover range hood is a top-side suction combined range hood, which combines the advantages of top suction and side suction, and can absorb fumes from the side and top at the same time, with a higher efficiency of absorbing fumes.

[0059] Please refer to Figure 1-Figure 3In some embodiments, the range hood 1 includes a range hood body 10 and a smoke collecting body 20. The range hood body 10 includes a flue assembly 12 and a fan assembly 11. The flue assembly 12 is connected between the fan assembly 11 and the smoke collecting body 20. The flue assembly 12 includes a flue shell 121. The smoke collecting body 20 includes a smoke collecting shell 24. The smoke collecting shell 24 has a smoke collecting cavity 20A and a smoke inlet 20B connected to the smoke collecting cavity 20A. The fan assembly 11 may include a fan shell 111 and a fan 112. The fan shell 111 has a fan cavity 111A. The fan 112 is arranged in the fan cavity 111A. In this way, the exhaust efficiency of oil smoke can be improved through the operation of the fan 112.

[0060] It can be understood that the flue shell 121 is connected between the smoke collecting shell 24 and the smoke collecting body 20, and the smoke collecting chamber 20A, the interior of the flue shell 121 and the fan chamber 111A are connected in sequence, so that the smoke inhaled from the smoking port 20B can flow through the smoke collecting chamber 20A, the interior of the flue shell 121 and the fan chamber 111A in sequence and then flow out to the outside.

[0061] The range hood 1 in the related art generates too much noise during operation, which results in a poor user experience when using the range hood 1. Figure 3-Figure 5 This embodiment proposes a housing assembly 30 , which includes the above-mentioned smoke collecting housing 24 , the fan housing 111 and the flue housing 121 .

[0062] The smoke collecting shell 24 can be made of metal. For example, the smoke collecting shell 24 can be stamped and welded from A3 cold-rolled steel plate (or stainless steel plate), and the surface of the smoke collecting shell 24 can be treated by phosphating and spraying to reduce the probability of rusting of the smoke collecting shell 24, so that the range hood 1 can have a longer service life. Moreover, when the surface of the smoke collecting shell 24 is treated by phosphating and spraying, the smoke collecting shell 24 can also be smooth and easy to clean. Of course, the smoke collecting shell 24 can also be a plastic structure, which is not limited in this embodiment.

[0063] The fan casing 111 may be roughly square in shape, and the material of the fan casing 111 may be metal or plastic. When it is made of metal, the fan casing 111 has the advantages of better hardness, better corrosion resistance, and metallic texture. This embodiment does not specifically limit the shape and material of the fan casing 111.

[0064] The flue shell 121 includes a bottom channel 1211, a middle channel 1212 and a top channel 1213, which are sequentially connected and communicated. The bottom channel 1211, the middle channel 1212 and the top channel 1213 can all be arranged in a long strip shape, and all three can be made of metal or plastic, which is not limited in this embodiment.

[0065] The bottom channel 1211 is connected to the smoke collecting housing 24 and communicates with the smoke collecting chamber 20A. The top channel 1213 may be located at one side of the fan housing 111, such as being located at one side of the fan housing 111 along the front-to-back direction of the range hood 1, or at one side of the fan housing 111 along the front-to-back direction of the range hood 1. The top channel 1213 is connected to the fan housing 111, and the top channel 1213 is communicated with the fan chamber 111A. In some exemplary structural forms, the top channel 1213 and the fan housing 111 may be an integrally formed structure, so as to prevent smoke from escaping from the gap between the top channel 1213 and the fan housing 111. Of course, in other exemplary structural forms, the top channel 1213 and the fan housing 111 may also be a split structure, which is not limited in this embodiment.

[0066] It is understandable that the smoke inhaled from the smoking port 20B can sequentially flow through the smoke collecting chamber 20A, the interior of the bottom channel 1211, the interior of the middle channel 1212, the interior of the top channel 1213 and the fan chamber 111A before flowing out to the outside.

[0067] In order to make the smoke collecting shell 24 drop down and be located below the user's breathing area when the range hood 1 is working, so as to avoid the smoke collecting shell 24 being higher than the user's breathing area and causing the user to inhale the smoke when collecting the smoke, and at the same time to reduce the diffusion path of the smoke and improve the escape of the smoke. After the range hood 1 finishes absorbing the smoke, the smoke collecting shell 24 can rise again, so that the smoke collecting shell 24 does not occupy too much space under the kitchen cabinet when the range hood 1 is not working. In this embodiment, the smoke collecting shell 24 is set to be height-adjustable, and the specific height adjustment forms include any one of the following forms:

[0068] The first one is that the bottom channel 1211 can be raised and lowered relative to the middle channel 1212, that is, a one-stage lifting form, so that the bottom channel 1211 can drive the smoke collecting shell 24 to be raised and lowered to adjust the height of the smoke collecting shell 24;

[0069] The second type is that the middle channel 1212 can be raised and lowered relative to the top channel 1213, that is, a one-stage lifting form, so that the middle channel 1212 can drive the bottom channel 1211 and the smoke collecting shell 24 to be raised and lowered together to adjust the height of the smoke collecting shell 24;

[0070] Thirdly, the bottom channel 1211 can be raised and lowered relative to the middle channel 1212, and the middle channel 1212 can be raised and lowered relative to the top channel 1213, that is, a multi-stage lifting form. In this way, the height of the smoke collecting shell 24 can be adjusted through the multi-stage lifting adjustment form.

[0071] During actual use, the noise in the shell assembly 30 includes the noise generated during the operation of the fan 112 and the noise generated when the smoke flows in the shell assembly 30, and this part of the noise will resonate in the bottom channel 1211, the middle channel 1212 and the top channel 1213, causing noise amplification and affecting the user experience.

[0072] Based on this, in this embodiment, the flow area of ​​the top channel 1213 and the flow area of ​​the bottom channel 1211 are set to be larger than the flow area of ​​the middle channel 1212, so that the flow area of ​​the top channel 1213, the flow area of ​​the middle channel 1212 and the flow area of ​​the bottom channel 1211 will present a form in which the flow area is larger than the flow area of ​​the middle channel 1212. This setting, on the one hand, can make it difficult for the noise located in the top channel 1213, the middle channel 1212 and the bottom channel 1211 to form resonance, thereby reducing the noise located in the top channel 1213 and the noise located in the middle channel 1212. The probability of superposition with the noise located in the bottom channel 1211 is conducive to reducing the intensity of the noise; on the other hand, the top channel 1213 and the bottom channel 1211 will both form areas with larger impedance, while the middle channel 1212 will form an area with smaller impedance, so that the noise will be hindered in the process of propagating from the top channel 1213 to the middle channel 1212, and in the process of propagating from the bottom channel 1211 to the middle channel 1212, and the energy of the noise can be effectively consumed, thereby helping to weaken the energy of the noise, so as to reduce the noise generated when the range hood 1 is in operation.

[0073] Please refer to Figure 4-Figure 5 In some embodiments, the bottom channel 1211 is fixedly connected to the smoke collecting housing 24. For example, the smoke collecting housing 24 further has a smoke exhaust port communicating with the smoke collecting chamber 20A. The bottom channel 1211 is disposed in the smoke exhaust port and is fixedly connected to the smoke collecting housing 24. Thus, the bottom channel 1211 is relatively fixed to the smoke collecting housing 24. The middle channel 1212 is fixedly connected to the top channel 1213. Thus, the middle channel 1212 is relatively fixed to the top channel 1213.

[0074] The bottom channel 1211 can drive the smoke collecting shell 24 to rise and fall relative to the middle channel 1212. In this way, the height of the smoke collecting shell 24 can be adjusted by lifting the bottom channel 1211 relative to the middle channel 1212, and the driving structure for lifting the bottom channel 1211 in the housing assembly 30 can be simplified based on the one-stage adjustment design, making the design simpler and the structural cost lower.

[0075] Please refer to Figure 4-Figure 5 In some embodiments, the bottom channel 1211 is sleeved on the middle channel 1212 and can be raised and lowered relative to the middle channel 1212. It can be understood that on the basis of the bottom channel 1211 sleeved on the middle channel 1212, the flow area of ​​the bottom channel 1211 can be directly larger than the flow area of ​​the middle channel 1212, and the implementation method is relatively simple, so on the basis of achieving the flow area of ​​the bottom channel 1211 larger than the flow area of ​​the middle channel 1212, it is helpful to reduce the noise in the housing assembly 30.

[0076] Moreover, the oil dripping from the middle channel 1212 can also flow directly into the middle channel 1212. It is understandable that if the middle channel 1212 is sleeved in the bottom channel 1211, the oil dripping from the middle channel 1212 will flow out from the gap between the outer wall of the middle channel 1212 and the inner wall of the bottom channel 1211, and then flow to the outside, making it impossible to collect the oil well, and it may even be necessary to specially design an oil collection structure, resulting in a complex structure of the shell assembly 30. Therefore, the design of this embodiment can better collect the oil dripping from the middle channel 1212 without the need to design a complex oil collection structure, thereby making the structure of the shell assembly 30 simple and having a better oil collection effect.

[0077] Of course, in other embodiments, if the bottom channel 1211 and the middle channel 1212 are not arranged in a sleeve form, an additional structure can be added to the inner wall surface of the middle channel 1212 to reduce the flow area of ​​the middle channel 1212, thereby making the flow area of ​​the middle channel 1212 smaller than the flow area of ​​the bottom channel 1211. The embodiments of the present application are not limited to this.

[0078] In order to improve the stability of the bottom channel 1211 when it is raised and lowered relative to the middle channel 1212, please refer to Figure 4-Figure 5 In some embodiments, the housing assembly 30 further includes a lifting drive assembly 14 and a sliding assembly 15 .

[0079] The lifting drive assembly 14 may include a push rod motor, wherein the push rod motor has the advantages of a relatively compact structure, small occupied space, and high transmission efficiency. Of course, the lifting drive assembly 14 may also be other drive structures, which are not limited in this embodiment. The lifting drive structure is arranged in the top channel 1213 and is transmission-connected with the bottom channel 1211. Thus, when the lifting drive structure is in operation, the bottom channel 1211 can be driven to rise and fall relative to the middle channel 1212.

[0080] The sliding assembly 15 is connected between the outer wall surface of the middle channel 1212 and the inner wall surface of the bottom channel 1211. For example, the sliding assembly 15 may include a slider and a slide rail. The slide rail is installed on the outer wall surface of the middle channel 1212 and extends along the height direction of the range hood 1 and is fixedly connected to the inner wall surface of the bottom channel 1211. In this way, the slider and the slide rail are slidably connected, so that the bottom channel 1211 can have a sliding fit with the middle channel 1212. Of course, the sliding assembly 15 can also be other sliding structures, which is not limited in this embodiment. In this way, the sliding assembly 15 is configured to enable the bottom channel 1211 to slide relative to the middle channel 1212 under the drive of the lifting drive assembly 14, and can drive the smoke collecting shell 24 to rise and fall relative to the middle channel 1212.

[0081] It can be understood that, in this embodiment, the provision of the sliding assembly 15 can help improve the stability and accuracy of the bottom channel 1211 when it is raised or lowered relative to the middle channel 1212 .

[0082] Please refer to Figure 4-Figure 5 In some embodiments, the middle channel 1212 is provided through the top channel 1213 and is fixedly connected to the top channel 1213. It is understandable that, on the basis of the middle channel 1212 passing through the top channel 1213, the flow area of ​​the top channel 1213 can be directly larger than the flow area of ​​the middle channel 1212, and the implementation method is relatively simple, so that on the basis of achieving the flow area of ​​the top channel 1213 being larger than the flow area of ​​the middle channel 1212, it is helpful to reduce the noise in the housing assembly 30.

[0083] Of course, in other embodiments, if the middle channel 1212 is not configured to penetrate the top channel 1213, an additional structure can be added to the inner wall surface of the middle channel 1212 to reduce the flow area of ​​the middle channel 1212, thereby making the flow area of ​​the middle channel 1212 smaller than the flow area of ​​the top channel 1213. The embodiments of the present application are not limited to this.

[0084] Please refer to Figure 4-Figure 6 In some embodiments, the flow area of ​​the intermediate channel 1212 is S 中 , the flow area of ​​the bottom channel 1211 is S底 , meet the conditions: 0.5×S 底 ≤S 中 ≤0.85×S 底 Such an arrangement can ensure the exhaust efficiency of smoke while making the housing assembly 30 have a good noise reduction effect.

[0085] It is understandable that if S 中 Less than 0.5×S 底 , which will lead to S 中 If S is too small, the smoke will flow slowly through the middle channel 1212, resulting in poor flow efficiency and affecting the exhaust efficiency of the smoke. 中 Greater than 0.85×S 底 , which will lead to S 底 It is too large, which causes the noise in the middle channel 1212 and the noise in the bottom channel 1211 to easily resonate, and the noise is less obstructed when propagating, resulting in excessive noise in the shell assembly 30.

[0086] For example, S 中 Specifically, it can be 0.5×S 底 , 0.55×S 底 , 0.6×S 底 , 0.65×S 底 , 0.7×S 底 , 0.75×S 底 , 0.8×S 底 or 0.85×S 底 , this embodiment does not limit this.

[0087] In some embodiments, the flow area of ​​the intermediate channel 1212 is S 中 , the flow area of ​​the top channel 1213 is S 顶 , meet the conditions: 0.5×S 顶 ≤S 中 ≤0.85×S 顶 Such an arrangement can ensure the exhaust efficiency of smoke while making the housing assembly 30 have a good noise reduction effect.

[0088] It is understandable that if S 中 Less than 0.5×S 顶 , which will lead to S 中 If S is too small, the smoke will flow slowly through the middle channel 1212, resulting in poor flow efficiency and affecting the exhaust efficiency of the smoke. 中 Greater than 0.85×S 顶 , which will lead to S 顶It is too large, which makes it easy for the noise in the middle channel 1212 and the noise in the top channel 1213 to resonate, and the noise is less obstructed when propagating, resulting in excessive noise in the shell assembly 30.

[0089] For example, S 中 Specifically, it can be 0.5×S 顶 , 0.55×S 顶 , 0.6×S 顶 , 0.65×S 顶 , 0.7×S 顶 , 0.75×S 顶 , 0.8×S 顶 or 0.85×S 顶 , this embodiment does not limit this.

[0090] In some embodiments, the flow area of ​​the intermediate channel 1212 is S 中 , the flow area of ​​the bottom channel 1211 is S 底 , meet the conditions: 0.5×S 底 ≤S 中 ≤0.85×S 底 ; and the flow area of ​​the top channel 1213 is S 顶 , meet the conditions: 0.5×S 顶 ≤S 中 ≤0.85×S 顶 Such a comprehensive arrangement can ensure that the housing assembly 30 has a good noise reduction effect while ensuring the exhaust efficiency of the smoke.

[0091] Please refer to Figure 5-Figure 6 In some embodiments, the length of the middle channel 1212 along the front-to-back direction of the range hood 1 is L 中 The length of the bottom channel 1211 along the front-to-back direction of the range hood 1 is L 底 , meet the conditions: 0.85×L 底 ≤L 中 ≤L 底 On the basis that the lengths of the middle channel 1212 and the bottom channel 1211 in the left-right direction of the range hood 1 remain unchanged, such an arrangement can ensure the exhaust efficiency of smoke while making the housing assembly 30 have a good noise reduction effect.

[0092] It is understandable that if L 中 Less than 0.85×L 底 , which will lead to L 中 If L is too small, the smoke will flow slowly through the middle channel 1212, resulting in poor flow efficiency and affecting the exhaust efficiency of the smoke. 中 Greater than L 底, it will cause the flow area of ​​the middle channel 1212 to be too large, which will cause the noise located in the middle channel 1212 and the noise located in the bottom channel 1211 to easily resonate, and the noise will be less obstructed during propagation, resulting in excessive noise in the shell assembly 30.

[0093] For example, L can be 0.85×L 底 、0.90×L 底 , 0.95×L 底 or L 底 , this embodiment does not limit this.

[0094] Please refer to Figure 5-Figure 6 In some embodiments, the length of the middle channel 1212 along the front-to-back direction of the range hood 1 is L 中 The length of the top channel 1213 along the front-to-back direction of the range hood 1 is L 顶 , meeting the conditions: 0.68×L 顶 ≤L 中 ≤L 顶 On the basis that the lengths of the middle channel 1212 and the top channel 1213 in the left-right direction of the range hood 1 remain unchanged, such an arrangement can ensure the exhaust efficiency of smoke while making the housing assembly 30 have a good noise reduction effect.

[0095] It is understandable that if L 中 Less than 0.68×L 顶 , which will lead to L 中 If L is too small, the smoke will flow slowly through the middle channel 1212, resulting in poor flow efficiency and affecting the exhaust efficiency of the smoke. 中 Greater than L 顶 , it will cause the flow area of ​​the middle channel 1212 to be too large, which will cause the noise located in the middle channel 1212 and the noise located in the top channel 1213 to easily resonate, and the noise will be less obstructed during propagation, resulting in excessive noise in the shell assembly 30.

[0096] For example, Ltop may be 0.68×L 底 , 0.7×L 底 , 0.8×L 底 , 0.9×L 底 or L 底 , this embodiment does not limit this.

[0097] Please refer to Figure 5-Figure 6 In some embodiments, the length of the middle channel 1212 along the front-to-back direction of the range hood 1 is L 中 The length of the bottom channel 1211 along the front-to-back direction of the range hood 1 is L 底The length of the top channel 1213 along the front-to-back direction of the range hood 1 is L 顶 . Satisfying conditions: 0.85×L 底 ≤L 中 ≤L 底 ; 0.68×L 底 ≤L 中 ≤L 底 Such a comprehensive arrangement can ensure that the housing assembly 30 has a good noise reduction effect while ensuring the exhaust efficiency of the smoke.

[0098] See also Figure 5 In some embodiments, along the front-to-back direction of the range hood 1, the total length of the top channel 1213 and the fan housing 111 is L1, which satisfies the condition: 0.15×L1≤L 顶 ≤0.4×L1. In this way, the exhaust efficiency of smoke can be effectively ensured and the exhaust effect of the range hood 1 can be improved.

[0099] If L 顶 If L is less than 0.15×L1, the length of the top channel 1213 will be too short, which will cause the smoke to flow slowly through the top channel 1213, resulting in poor flow efficiency and affecting the exhaust efficiency of the smoke. 顶 If it is greater than 0.4×L1, L2 will be too small, which will cause the size of the fan 112 to be too small, resulting in the size of the blades of the fan 112 to be too small, affecting the smoke exhaust power of the fan 112.

[0100] For example, L 顶 Specifically, it can be 0.15×L1, 0.2×L1, 0.25×L1, 0.3×L1, 0.35×L1 or 0.4×L1, which is not limited in this embodiment.

[0101] See also Figure 5 In some embodiments, along the front-to-back direction of the range hood 1, the total length of the top channel 1213 and the fan housing 111 is L1, and the length of the fan 112 is L2. Among them, the condition is satisfied: 1.5×L2≤L1≤2.5×L2. In this way, the exhaust efficiency of the smoke can be effectively ensured, the exhaust effect of the range hood 1 can be improved, and the size of the range hood 1 can be prevented from being too large.

[0102] If L1 is less than 1.5×L2, the total length of the top channel 1213 and the fan housing 111 is too short, resulting in a slow flow rate of smoke when flowing through the top channel 1213 and the fan chamber 111A, poor circulation efficiency, and affecting the exhaust efficiency of smoke. If L1 is greater than 2.5×L2, the total length of the top channel 1213 and the fan housing 111 is too long, resulting in the range hood 1 occupying too much volume in the cabinet.

[0103] Exemplarily, L1 may be 1.5×L2, 1.7×L2, 2×L2, 2.3×L2 or 2.5×L2, which is not limited in this embodiment.

[0104] See also Figure 5 In some embodiments, along the front-to-back direction of the range hood 1, the total length of the top channel 1213 and the fan housing 111 is L1, and the length of the fan 112 is L2. Among them, the following conditions are satisfied: 0.15×L1≤Ltop≤0.4×L1; 1.5×L2≤L1≤2.5×L2. In this way, through comprehensive settings, the exhaust efficiency of smoke can be effectively ensured, the exhaust effect of the range hood 1 can be improved, and the size of the range hood 1 can be prevented from being too large.

[0105] See also Figure 6 In some embodiments, along the height direction of the range hood 1, the middle channel 1212 is a hard part, such as a hard shell or a hard tube, so that the strength of the middle channel 1212 is better and not easy to be damaged, and the height of the middle channel 1212 is H 中 . Satisfy the conditions: 50mm≤H 中 ≤150mm. In this way, while ensuring the effect of reducing noise, it is prevented that the range hood 1 takes up too much space in the cabinet.

[0106] If H 中 If the height of the middle channel 1212 is less than 50 mm, the height of the middle channel 1212 will be too small, resulting in a short distance between the top channel 1213 and the bottom channel 1211, which will cause the noise in the top channel 1213 to resonate with the noise in the bottom channel 1211, and will also cause the propagation path of the noise in the middle channel 1212 to be too short, resulting in poor noise reduction effect. 中 If it is greater than 150mm, the height of the middle channel 1212 will be too long, which will cause the range hood 1 to be too long in the height direction when the bottom channel 1211 is lowered relative to the middle channel 1212 when the range hood 1 is in operation, resulting in excessive occupation of cabinet space.

[0107] For example, H 中 Specifically, it can be 50mm, 70mm, 100mm, 120mm or 150mm, which is not limited in this embodiment.

[0108] See also Figure 6 In some embodiments, along the height direction of the range hood 1, the height of the middle channel 1212 and the height of the top channel 1213 are H and H respectively. 中 With H 顶 Among them, the following conditions are met: H 中 ≤H 顶 ≤2.5×H 中In this way, while ensuring the effect of reducing noise, the range hood 1 is prevented from occupying too much space in the cabinet.

[0109] If H 顶 Less than H 中 , which will lead to H 顶 If the size of H is too small, the propagation path of the noise in the top channel 1213 will be too short, and the noise reduction effect will be poor. 顶 Greater than 2.5×H 中 , it will cause the height of the top channel 1213 to be too long, which will cause the range hood 1 to be too long in the height direction when the range hood 1 is in operation and the bottom channel 1211 is lowered relative to the middle channel 1212, resulting in the range hood 1 being too long in the operation direction, resulting in excessive occupation of cabinet space.

[0110] For example, H 顶 Specifically, it can be H 中 , 1.5×H 中 , 2×H 中 or 2.5×H 中 , this embodiment does not limit this.

[0111] See also Figure 6 In some embodiments, along the height direction of the range hood 1, the height of the bottom channel 1211 is H 底 The middle channel 1212 is a hard part, such as a hard shell or a hard tube, so that the middle channel 1212 has better strength and is not easily damaged.

[0112] The height of the middle channel 1212 along the height direction of the range hood 1 is H. 中 . Satisfy the conditions: H 中 ≤H 底 ≤1.5×H 中 In this way, the noise reduction effect is ensured and the range hood 1 is prevented from occupying too much space in the cabinet.

[0113] If H 底 Less than H 中 , which will lead to H 底 If H is too small, the propagation path of the noise in the bottom channel 1211 will be too short, resulting in poor noise reduction effect. 底 Greater than 1.5×H 中 , it will cause the height of the bottom channel 1211 to be too long, which will cause the range hood 1 to be too long in the height direction when the bottom channel 1211 is lowered relative to the middle channel 1212 when the range hood 1 is in operation, resulting in excessive occupation of cabinet space.

[0114] For example, H 底 Specifically, it can be H 中, 1.1×H 中 , 1.2×H 中 , 1.3×H 中 , 1.4×H 中 or 1.5×H 中 , this embodiment does not limit this.

[0115] See also Figure 7 Or, along the height direction of the range hood 1, the height of the bottom channel 1211 is H 底 The middle channel 1212 is a compressible hose. It is understandable that the hose can be expanded as the bottom channel 1211 descends, and can also be contracted as the bottom channel 1211 rises. In this way, the overall size of the range hood 1 can be further reduced when the bottom channel 1211 rises.

[0116] The height of the middle channel 1212 along the height direction of the range hood 1 is H. 中 . Satisfying conditions: 0.3×H 中 ≤H 底 ≤H 中 It should be noted that the size limitation here is obtained on the basis of the hose being fully extended. In this way, the noise reduction effect is ensured and the range hood 1 is prevented from occupying too much space in the cabinet.

[0117] If H 底 Less than 0.3×H 中 , which will lead to H 底 If H is too small, the propagation path of the noise in the bottom channel 1211 will be too short, resulting in poor noise reduction effect. 底 Greater than H 中 , it will cause the height of the bottom channel 1211 to be too long, which will cause the range hood 1 to be too long in the height direction when the bottom channel 1211 is lowered relative to the middle channel 1212 when the range hood 1 is in operation, resulting in excessive occupation of cabinet space.

[0118] For example, H 底 Specifically, it can be 0.3×H 中 , 0.4×H 中 , 0.5×H 中 , 0.6×H 中 , 0.7×H 中 , 0.8×H 中 , 0.9×H 中 or H 中 , this embodiment does not limit this.

[0119] To further reduce the noise in the housing assembly 30, please refer to Figure 8-Figure 9In some embodiments, the shell assembly 30 has a flue gas guide 12B, and the shell assembly 30 further includes a fairing 122 .

[0120] The rectifying member 122 may include at least one of a muffler, a metal member, and a plastic member, and this embodiment does not limit this. When the rectifying member 122 is a muffler, it can further reduce the noise and achieve a better noise reduction effect. It is understandable that the rectifying member 122 itself can rectify and guide the flow of smoke, that is, rectify and guide the smoke flowing from the inside of the middle channel 1212 to the inside of the top channel 1213, so that the probability of eddy currents generated when the smoke flows can be reduced, so as to reduce the flow loss of the smoke, improve the smoking efficiency, and effectively reduce the noise generated when the smoke flows. The rectifying member 122 is arranged inside the middle channel 1212, and the rectifying member 122 is connected to the inner wall of the middle channel 1212. It is understandable that on the basis that the middle channel 1212 is made of a rigid material such as metal, the rectifying member 122 can be relatively stably installed on the middle channel 1212, ensuring the stability of the connection and also ensuring the safety of the user when using the range hood 1.

[0121] The flue gas duct 12B includes a first flow guiding section 12C and a second flow guiding section 12D which are connected to each other. It is understood that in one form, the interior of the bottom channel 1211 is connected to the first flow guiding section 12C, and the second flow guiding section 12D is connected to the interior of the top channel 1213; in another form, the bottom channel 1211 is connected to the second flow guiding section 12D, and the top channel 1213 is connected to the fan chamber 111A.

[0122] Specifically, the flow straightener 122 at least forms a first flow guide section 12C, or the flow straightener 122 and the intermediate channel 1212 at least jointly form the first flow guide section 12C; the flow straightener 122 also forms a second flow guide section 12D, or the flow straightener 122 and the intermediate channel 1212 jointly form the second flow guide section 12D, or a section of the intermediate channel 1212 where the flow straightener 122 is not provided is the second flow guide section 12D. It is understandable that the first flow guide section 12C and the second flow guide section 12D may be formed in any of the following forms:

[0123] The first type: the fairing 122 forms a first guide section 12C, and the fairing 122 also forms a second guide section 12D;

[0124] The second type: the fairing 122 forms a first guide section 12C, and a section of the middle channel 1212 where the fairing 122 is not provided forms a second guide section 12D;

[0125] The third type: the fairing 122 forms a first guide section 12C, and the fairing 122 and the middle channel 1212 form a second guide section 12D together;

[0126] The fourth type: the fairing 122 and the middle channel 1212 together form a first guide section 12C, and the fairing 122 forms a second guide section 12D;

[0127] The fifth type: the rectifying member 122 and the middle channel 1212 together form a first flow guide section 12C, and a section of the middle channel 1212 where the rectifying member 122 is not provided forms a second flow guide section 12D;

[0128] The sixth type: the flow straightening member 122 and the middle channel 1212 jointly form a first flow guiding section 12C, and the flow straightening member 122 and the middle channel 1212 jointly form a second flow guiding section 12D.

[0129] In order to reduce the noise generated by the shell assembly 30 during the operation of the range hood 1, the flow area of ​​the first guide section 12C is set to be larger than the flow area of ​​the second guide section 12D in this embodiment. This setting, on the one hand, makes it difficult for the first guide section 12C and the second guide section 12D to form resonance, reduces the probability of the noise located in the first guide section 12C and the noise located in the second guide section 12D being superimposed, and is conducive to reducing the intensity of the noise; at the same time, the first guide section 12C is formed into a region with a larger impedance, and the second guide section 12D is formed into a region with a smaller impedance, so that the noise is hindered in the process of propagating from the first guide section 12C to the second guide section 12D, or from the second guide section 12D to the first guide section 12C, and can effectively consume the energy of the noise, thereby helping to weaken the energy of the noise. Combined with the setting that the flow area of ​​the top channel 1213 and the flow area of ​​the bottom channel 1211 are both larger than the flow area of ​​the middle channel 1212, the noise of the entire range hood 1 is greatly reduced.

[0130] On the other hand, based on the form of internal connection between the first guide section 12C and the bottom channel 1211, the first guide section 12C with a larger flow area can increase the flow area of ​​the smoke flowing into the guide flue 12B, so that the middle channel 1212 has a better smoke gathering effect and improves the smoke exhaust efficiency; and based on the form of internal connection between the first guide section 12C and the top channel 1213, the first guide section 12C with a larger flow area can reduce the flow rate of the oil smoke, which helps to reduce the impact intensity of the oil smoke on the fan 112, thereby effectively reducing the noise of the entire range hood 1.

[0131] It is worth mentioning that, based on the fact that the rectifying member 122 is arranged on the inner wall of the middle channel 1212 and the rectifying member 122 can construct the form of the first guide section 12C, in the actual manufacturing process, the middle channel 1212 and the rectifying member 122 can be manufactured and formed separately, and then the two can be assembled. This facilitates the manufacturing and production of the middle channel 1212 and the rectifying member 122, and at the same time avoids the shape of the middle channel 1212 being too complicated due to the separate construction of the guide flue 12B through the middle channel 1212 itself, making the design of the middle channel 1212 simpler, so that the shape of the middle channel 1212 can be designed to be more regular.

[0132] Further, the fairing 122 is arranged in a ring on the inner wall of the middle channel 1212. It is understandable that the fairing 122 can be arranged in a ring shape and arranged on the inner wall of the middle channel 1212, so that the first guide section 12C can be directly constructed by using the fairing 122, and in some forms, the second guide section 12D can also be directly constructed by using the fairing 122. Based on this embodiment, the first guide section 12C and the second guide section 12D can be constructed in any of the following forms:

[0133] The first type: the fairing 122 forms a first guide section 12C, and the fairing 122 also forms a second guide section 12D;

[0134] The second type: the fairing 122 forms a first guide section 12C, and a section of the middle channel 1212 where the fairing 122 is not provided forms a second guide section 12D;

[0135] The third type: the fairing 122 forms a first guide section 12C, and the fairing 122 and the middle channel 1212 form a second guide section 12D together.

[0136] Thus, by the annular arrangement of the rectifying member 122, on the one hand, when the smoke flows through the guide flue 12B, it can be rectified and guided by the rectifying member 122, thereby further reducing the overall flow loss of the smoke, improving the smoking efficiency, and effectively reducing the noise generated when the smoke flows. On the other hand, a single rectifying member 122 can be arranged on the inner wall of the middle channel 1212, with fewer assembly steps, and the annular rectifying member 122 has a more regular structure, which is convenient for manufacturing and production.

[0137] Alternatively, the fairing 122 is disposed on a portion of the inner wall of the intermediate channel 1212. It is understandable that the inner wall of the intermediate channel 1212 is partially covered by the fairing 122, so the intermediate channel 1212 can at least jointly construct the first guide section 12C with the fairing 122, and in some forms, the fairing 122 and the intermediate channel 1212 can also be further used to jointly construct the second guide section 12D. Based on this embodiment, the first guide section 12C and the second guide section 12D can be constructed in any of the following forms:

[0138] The first type: the fairing 122 and the middle channel 1212 together form a first guide section 12C, and a section of the middle channel 1212 where the fairing 122 is not provided forms a second guide section 12D;

[0139] The second type: the flow straightening member 122 and the middle channel 1212 jointly form a first flow guiding section 12C, and the flow straightening member 122 and the middle channel 1212 jointly form a second flow guiding section 12D.

[0140] In this way, the first guide section 12C can be constructed through the cooperation of the rectifying component 122 and the middle channel 1212 to reduce the material usage of the rectifying component 122, which is beneficial to reducing production costs. In addition, the rectifying component 122 can be flexibly set at a specific position in the middle channel 1212 according to the actual required rectifying and guiding effects, which makes operation more convenient.

[0141] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0142] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A housing assembly, characterized in that: Suitable for range hoods, including: A smoke collecting shell having a smoke collecting cavity; A flue shell, comprising a bottom channel, a middle channel and a top channel which are connected and communicated in sequence, wherein the bottom channel is connected to the smoke collecting shell and communicated with the smoke collecting chamber, and the bottom channel can be raised and lowered relative to the middle channel, and / or the middle channel can be raised and lowered relative to the top channel, so as to adjust the height of the smoke collecting shell; and A fan housing, connected to the top channel and having a fan cavity communicated with the top channel, wherein the fan cavity is used to accommodate a fan of the range hood; Wherein, the flow area of ​​the top channel and the flow area of ​​the bottom channel are both larger than the flow area of ​​the middle channel.

2. The housing assembly according to claim 1, wherein: The bottom channel is fixedly connected to the smoke collecting shell, and the middle channel is fixedly connected to the top channel; Wherein, the bottom channel can drive the smoke collecting shell to rise and fall relative to the middle channel.

3. The housing assembly according to claim 2, wherein: The bottom channel is sleeved on the middle channel and can be lifted and lowered relative to the middle channel.

4. The housing assembly according to claim 3, characterized in that: The housing assembly further comprises: A lifting drive assembly is disposed in the top channel and is drivingly connected to the bottom channel; and A sliding assembly connected between the outer wall surface of the middle channel and the inner wall surface of the bottom channel; Wherein, the sliding assembly is configured to enable the bottom channel to slide relative to the middle channel under the drive of the lifting drive assembly, thereby driving the smoke collecting shell to rise and fall relative to the middle channel.

5. The housing assembly according to claim 2, wherein: The middle channel passes through the top channel and is fixedly connected to the top channel.

6. The housing assembly according to claim 1, wherein: The flow area of ​​the intermediate channel is S 中 ; Among them, the flow area of ​​the bottom channel is S 底 , meet the conditions: 0.5×S 底 ≤S 中 ≤0.85×S 底 and / or, The flow area of ​​the top channel is Stop, which satisfies the condition: 0.5×S 顶 ≤S 中 ≤0.85×S 顶 .

7. The housing assembly according to claim 1, wherein: The length of the middle channel along the front-to-back direction of the range hood is L 中 ; The length of the bottom channel along the front-to-back direction of the range hood is L 底 , meet the conditions: 0.85×L 底 ≤L 中 ≤L 底 and / or, The length of the top channel along the front-to-back direction of the range hood is L 顶 , meeting the conditions: 0.68×L 顶 ≤L 中 ≤L 顶 .

8. The housing assembly according to claim 7, wherein: Along the front-to-back direction of the range hood, the total length of the top channel and the fan housing is L1; Among them, the condition is met: 0.15×L1≤L 顶 ≤0.4×L1; and / or, The length of the fan is L2, which satisfies the condition: 1.5×L2≤L1≤2.5×L2.

9. The housing assembly according to claim 1, wherein: The middle channel is a hard part, and along the height direction of the range hood, the height of the middle channel is H 中 ; Among them, the conditions are met: 50mm≤H 中 ≤150mm.

10. The housing assembly according to claim 1, wherein: Along the height direction of the range hood, the height of the middle channel and the height of the top channel are H and 中 With H 顶 ; Among them, the following conditions are met: H 中 ≤H 顶 ≤2.5×H 中 .

11. The housing assembly according to claim 1, wherein: Along the height direction of the range hood, the height of the bottom channel is H 底 ; The middle channel is a hard part, and the height along the height direction of the range hood is H. 中 , satisfying the conditions: H 中 ≤H 底 ≤1.5×H 中 ;or, The middle channel is a compressible hose, and the height along the height direction of the range hood is H. 中 , meet the conditions: 0.3×H 中 ≤H 底 ≤H 中 .

12. The housing assembly according to any one of claims 1 to 11, characterized in that: The housing assembly has a flue gas duct and further comprises: A flow straightener is arranged inside the intermediate channel and connected to the inner wall of the intermediate channel, the flow straightener at least forms a first flow guide section, or the flow straightener and the intermediate channel at least form a first flow guide section together; the flow straightener also forms a second flow guide section, or the flow straightener and the intermediate channel form a second flow guide section together, or a section of the intermediate channel where the flow straightener is not provided is the second flow guide section; Wherein, the guide flue comprises the first guide section and the second guide section, the first guide section is connected to the second guide section, and the flow area of ​​the first guide section is larger than the flow area of ​​the second guide section.

13. The housing assembly according to claim 12, wherein: The fairing member is arranged on the inner wall of the middle channel in a ring shape, or the fairing member is arranged on part of the inner wall of the middle channel.

14. A range hood, characterized in that: include: The housing assembly according to any one of claims 1 to 13; and The fan is accommodated in the fan cavity.

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