Flow guiding noise reducing component and range hood

Abstract

The application discloses a flow guiding and noise reducing component and a smoke machine. The flow guiding and noise reducing component has a cavity which extends along the length direction of the flow guiding and noise reducing component, and the cross-sectional area of the cavity changes along the length direction of the flow guiding and noise reducing component. The flow guiding and noise reducing component is provided with a sound absorbing hole which is communicated with the cavity. The flow guiding and noise reducing component can reduce the noise of the smoke machine and improve the user experience.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, specifically to a flow-guiding and noise-reducing component and a range hood. Background Technology

[0002] Range hoods, as essential kitchen appliances, purify the kitchen environment and improve the cooking experience. They draw in the mixture of cooking fumes and water vapor, then expel it using the air pressure generated by the fan. However, current range hood technology often results in high noise levels and a poor user experience. Summary of the Invention

[0003] This invention is based on the inventor's discoveries and understanding of the following facts and problems:

[0004] In related technologies, a range hood has an air inlet mesh panel on each of its left and right sides, which can solve the problem of separately extracting oil fumes when using cookware on the left and right sides, thus improving the efficiency of oil fume extraction. However, since the left and right air inlet mesh panels are connected, airflow interference occurs when both air inlet mesh panels are used simultaneously, resulting in relatively loud noise and affecting the user experience.

[0005] Therefore, this invention proposes a flow guiding and noise reduction component, which can reduce the noise of the range hood and improve the user experience.

[0006] The present invention also proposes a smoke hood.

[0007] The present invention discloses a noise reduction and airflow guiding component having a chamber extending along its length, the cross-sectional area of ​​which varies along the length of the component. The component includes silencing holes communicating with the chamber. In this invention, airflow enters the chassis from the air inlet, and the component separates the airflow entering from the inlet, preventing mutual interference and thus reducing noise. The varying cross-sectional area of ​​the chamber further reduces airflow noise, and the silencing holes further reduce noise generated by the airflow, resulting in a better user experience. Therefore, the noise reduction and airflow guiding component of the present invention can reduce noise during kitchen exhaust, thereby improving the user experience.

[0008] Optionally, the cross-sectional area of ​​the chamber gradually increases along the length of the airflow guiding and noise reduction component. The airflow guiding and noise reduction component of the present invention can be adapted to the air inlet of the range hood to facilitate smooth airflow and achieve good airflow guiding and noise reduction effects.

[0009] Optionally, the airflow guiding and noise reduction component includes a first side plate and a second side plate, which are arranged opposite to each other. The chamber is formed between the first side plate and the second side plate, and at least a portion of at least one of the first and second side plates is bent inward toward the chamber. In this airflow guiding and noise reduction component, the bending of at least a portion of at least one of the first and second side plates toward the chamber facilitates a smooth change in the airflow direction, thereby reducing the vibration generated when the airflow impacts the first or second side plate, and thus reducing the noise generated during fume extraction, thereby improving the user experience.

[0010] Optionally, the airflow guiding and noise reduction component further includes a top plate, the bottom of which is connected to the first side plate and the second side plate respectively on both sides in the width direction. The first side plate extends in a direction away from the top plate and the second side plate, and the second side plate extends in a direction away from the top plate and the first side plate. The extension directions of the first side plate and the second side plate both form an angle with the thickness direction of the top plate. In the airflow guiding and noise reduction component of the present invention, the first side plate and the second side plate are both connected to the top plate. The impact force of the airflow on the first side plate and the impact force of the airflow on the second side plate can cancel each other out, thereby improving the stability of the airflow guiding and noise reduction component and facilitating airflow guidance.

[0011] Optionally, the at least one side plate includes a first segment, a second segment, and a third segment connected sequentially in its extending direction. The first segment is connected to the top plate. In a projection plane orthogonal to the length direction of the top plate, the projections of the first segment and the third segment are both straight planes, while the projection of the second segment is an arc-shaped plane. In the airflow guiding and noise reduction component of the present invention, the surfaces of the first and second side plates are approximately curved, facilitating a smooth change in the airflow direction, thereby reducing the vibration generated when the airflow impacts the first side plate, and further reducing the noise generated during fume extraction, thus improving the user experience.

[0012] Optionally, the side of the first segment furthest from the top plate forms an angle α with the top surface of the top plate, where α is between 5° and 15°. In the airflow guiding and noise reduction component of the present invention, if the angle α exceeds 15 degrees, the top plate will interfere with the parts on the upper part of the top plate. Installing the airflow guiding and noise reduction component would necessitate increasing the vertical dimensions of the casing, thus increasing the space occupied by the range hood and resulting in a poor user experience. When the angle α is less than 5 degrees, the gap between the top plate and the parts on the upper part of the top plate will be too large, causing interference with the airflow entering the casing, leading to poor airflow guiding and noise reduction effects. In the airflow guiding and noise reduction component of the embodiment of the present invention, α is within this range, resulting in better airflow guiding and noise reduction effects.

[0013] Optionally, the top plate has a first end and a second end arranged opposite to each other along the length of the airflow guiding and noise reduction component, and the ratio of the width of the first end to the width of the second end of the top plate is 0.5-0.7. The airflow guiding and noise reduction component of the present invention, by configuring the top plate in the above-described form, achieves good airflow guiding effect for both the airflow guiding component and the smoke hood.

[0014] The airflow guiding and noise reduction component of this invention, by limiting the ratio of the first end and the second end of the top plate, facilitates the first side plate to be arranged substantially parallel to the air inlet, and facilitates the second side plate to be arranged substantially parallel to the air inlet, which is conducive to the uniform flow of airflow in the extension direction of the airflow guiding and noise reduction component, thereby improving the airflow guiding effect of the airflow guiding and noise reduction component.

[0015] Optionally, the second segment has a first end and a second end arranged opposite to each other along the length of the airflow guiding and noise reduction component, and the ratio of the radius of curvature of the first end to the radius of curvature of the second end of the second segment is 0.5-0.7. The airflow guiding and noise reduction component of the present invention, by configuring the second segment as described above, achieves good airflow guiding effect for both the airflow guiding component and the smoke hood.

[0016] Optionally, the extension direction of the first segment forms an angle β with the thickness direction of the top plate, and β is 0°-10°. In this embodiment of the invention, the airflow guiding and noise reduction component is configured with an angle β to prevent airflow from directly impacting the first segment and generating noise. This facilitates guiding the airflow upwards, thereby improving the airflow guiding and noise reduction effect of the component.

[0017] Optionally, the top surface of the top plate has a first side and a second side arranged opposite to each other in its width direction, with an included angle γ between the first side and the second side, and γ being 15°-20°. In the airflow guiding and noise reduction component of the present invention, the included angle between the first side and the second side facilitates the adaptation of the first side plate to the air inlet and the second side plate to the air inlet, thus benefiting airflow guiding and noise reduction.

[0018] Optionally, the top surface of the top plate is an isosceles trapezoid. The airflow guiding and noise reduction component of the present invention has a symmetrical top plate with identical spatial structures on both sides. When cookware is used simultaneously, the airflow entering from both sides of the range hood is equal in size, preventing a situation where one side has a larger airflow and the other a smaller airflow. This facilitates stable airflow guiding and noise reduction by the airflow guiding and noise reduction component.

[0019] Optionally, there are multiple silencing holes, which are divided into multiple groups. These groups of silencing holes are spaced apart along the extension direction of at least one side plate. Each group of silencing holes includes multiple silencing holes spaced apart along the length direction of the top plate. The flow-guiding noise reduction component of the present invention, by providing multiple silencing holes, can improve the noise reduction effect of the flow-guiding noise reduction component and enhance the user experience.

[0020] Optionally, the spacing between adjacent noise-reducing holes is 13mm-15mm; and / or, the noise-reducing holes are circular holes with a diameter of 2.5mm-3.5mm. The airflow guiding and noise reduction component of the present invention can be designed with noise-reducing holes of different sizes as needed, increasing product diversity.

[0021] Optionally, the airflow guiding and noise reduction component further includes sound-absorbing cotton disposed within the cavity. The sound-absorbing cotton comprises a straight section and an arc-shaped section connected to each other. The straight section is adjacent to the top plate compared to the arc-shaped section. At least a portion of the straight section contacts the at least one side plate, and the arc-shaped section curves towards the inner side of the cavity. The airflow guiding and noise reduction component of the present invention, by incorporating sound-absorbing cotton, can further enhance the noise reduction capability of the range hood based on the sound-absorbing holes, thereby improving the user experience.

[0022] The range hood of the present invention includes:

[0023] Chassis;

[0024] The fan is located inside the casing;

[0025] A flow-guiding and noise-reducing component, wherein the flow-guiding and noise-reducing component is disposed inside the chassis and is any of the flow-guiding and noise-reducing components described above.

[0026] Optionally, the cross-sectional area of ​​the chamber gradually increases along the direction toward the rear wall of the chassis.

[0027] In the smoke hood of the present invention, the cross-sectional area of ​​the chamber gradually increases along the direction towards the rear wall of the casing, so that the airflow guiding and noise reduction components can be adapted to the air inlet of the smoke hood, so as to facilitate smooth airflow and better airflow guiding and noise reduction effect.

[0028] Optionally, the chassis includes a panel with an air inlet, and the airflow guiding and noise reduction component is arranged opposite to the air inlet and located at the bottom of the fan. In this invention, the airflow entering from the air inlet can be guided into the fan by the airflow guiding and noise reduction component, resulting in good fume extraction.

[0029] Optionally, the side of the first segment away from the top plate is arranged parallel to the outer side of the panel.

[0030] Optionally, the distance between the airflow guiding and noise reduction component and the rear wall of the chassis is a first distance, and the ratio between the first distance and the length of the airflow guiding and noise reduction component is 0.4-0.7. In this embodiment of the smoke hood, the airflow guiding and noise reduction component is spaced apart from the rear wall of the chassis, facilitating the installation of the component. Furthermore, the ratio of the first distance to the length of the airflow guiding and noise reduction component (0.4-0.7) avoids howling noise between the component and the rear wall of the chassis, thus preventing disruption to the user experience.

[0031] Optionally, the distance between the fan and the front wall of the casing is less than the distance between the fan and the rear wall of the casing. In this invention, the rear wall of the casing is connected to a wall, the fan is located slightly forward inside the casing, and a gap is provided between the rear surface of the fan and the rear wall of the casing to facilitate smoother airflow from the rear of the fan into the fan, thereby improving the fume extraction effect.

[0032] Optionally, the distance between the fan and the front wall of the casing is a second distance, and the distance between the front wall of the casing and the rear wall of the casing is a third distance, with the ratio of the second distance to the third distance being 0-0.2. In this embodiment of the smoke hood, the fan and casing are arranged at an interval, facilitating fan installation. Furthermore, the ratio of the second distance to the third distance being 0-0.2 prevents whistling noise from the airflow passing through the fan, thus avoiding negative impacts on the user experience. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the flow-guiding and noise-reducing component according to an embodiment of the present invention.

[0034] Figure 2 This is a partial cross-sectional view of the range hood according to an embodiment of the present invention.

[0035] Figure 3 yes Figure 2 A frontal view diagram.

[0036] Figure 4 This is a bottom view of the range hood according to an embodiment of the present invention.

[0037] Figure 5 This is a cross-sectional view of the range hood according to an embodiment of the present invention from another angle.

[0038] Figure 6 yes Figure 5 A left-side view diagram.

[0039] Figure label:

[0040] Range hood 100;

[0041] Chassis 1; Front wall 101; Rear wall 102; Front panel 103;

[0042] Air inlet 10; First air inlet 11; Second air inlet 12; Light assembly 13; Bracket 131;

[0043] Noise reduction and flow guiding component 2; chamber 20; first section 201; first side 2011; second section 202; third section 203; top plate 21; first side 211; second side 212; first side plate 22; second side plate 23; sound-absorbing hole 24; sound-absorbing cotton 25;

[0044] Fan 3. Detailed Implementation

[0045] Embodiments of the present invention are described in detail below, with examples of the embodiments illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0046] like Figures 1 to 6 As shown, the smoke hood 100 of this embodiment includes a casing 1, a fan 3 and a flow guiding and noise reduction component 2, both of which are located inside the casing.

[0047] In some embodiments, the chassis 1 includes a panel 103, on which an air inlet 10 is provided, and a flow guiding and noise reduction component 2 is arranged opposite to the air inlet 10 and located at the bottom of the fan 3.

[0048] like Figures 2 to 6 As shown, the range hood 100 has a panel 103 on the side facing the stovetop; in other words, the panel 103 is located on the lower surface of the range hood 100. The airflow guiding and noise reduction component 2 is located below the fan 3, and is positioned opposite the air inlet 10 to guide the fumes entering from the air inlet 10 to the fan 3. The panel 103 has an air inlet 10 to allow fumes to enter the range hood 100. Therefore, the airflow entering from the air inlet 10 can be guided to the fan 3 through the airflow guiding and noise reduction component 2, resulting in good fume extraction.

[0049] The panel 103 is provided with one or more air inlets 10. Optionally, the air inlet 10 includes a first air inlet 11 and a second air inlet 12. As those skilled in the art will know, the first air inlet 11 and the second air inlet 12 are not parallel, but are arranged in a figure-eight shape at a predetermined angle, thereby improving the fume extraction effect.

[0050] In some embodiments, the distance between the airflow-guiding and noise-reducing component 2 and the rear wall of the casing 1 is a first distance, and the ratio between the first distance and the length of the airflow-guiding and noise-reducing component 2 (the dimension of the airflow-guiding and noise-reducing component 2 in the front-rear direction) is 0.4-0.7. For example, the ratio between the first distance and the length of the airflow-guiding and noise-reducing component 2 is 0.4, 0.5, 0.7, etc. In the smoke hood 100 of this embodiment, the airflow-guiding and noise-reducing component 2 is spaced apart from the rear wall 102 of the casing 1, which facilitates the installation of the airflow-guiding and noise-reducing component 2. Moreover, the ratio between the first distance and the length of the airflow-guiding and noise-reducing component 2 is 0.4-0.7, which can avoid the generation of howling between the airflow-guiding and noise-reducing component 2 and the rear wall 102 of the casing 1, thereby affecting the user experience. In some embodiments, such as Figure 6 As shown, the distance between the fan 3 and the front wall 101 of the casing 1 is less than the distance between the fan 3 and the rear wall 102 of the casing 1. For ease of description, the following will use... Figure 6 The front-to-back direction shown is the front-to-back direction of the range hood 100. The front surface of the range hood 100 is the front wall surface 101, and the rear surface of the range hood 100 is the rear wall surface 102. Thus, the rear wall surface 102 of the casing 1 is connected to the wall, and the fan 3 is located in a slightly forward position inside the casing 1. There is a gap between the rear surface of the fan 3 and the rear wall surface 102 of the casing 1, so that the airflow passing through the airflow guiding and noise reduction component 2 can enter the fan 3 more smoothly from the rear, thereby improving the fume extraction effect.

[0051] In some embodiments, the distance between the fan 3 and the front wall of the casing 1 is a second distance, and the distance between the front wall of the casing 1 and the rear wall of the casing 1 is a third distance, with the ratio between the second distance and the third distance being 0-0.2. For example, the second distance is 0.1 times, 0.15 times, or 0.2 times the third distance, etc. In the smoke hood 100 of this embodiment, the fan 3 and the casing 1 are arranged at intervals, which facilitates the installation of the fan 3. Moreover, the ratio between the second distance and the third distance is 0-0.2, which can prevent the airflow from generating whistling noise when passing through the fan 3, thereby affecting the user experience.

[0052] The following is a reference to the appendix. Figures 1 to 6 The flow-guiding and noise-reducing component 2 of this embodiment is described in detail.

[0053] The flow guiding and noise reduction component 2 of this embodiment of the invention has a chamber 20, and the chamber 20 is along the length direction of the flow guiding and noise reduction component 2 (e.g., Figure 1 The cavity 20 extends in the front-back direction shown, and the cross-sectional area of ​​the cavity 20 varies along the length of the flow-guiding and noise-reducing component 2. The flow-guiding and noise-reducing component 2 is provided with a noise-absorbing hole 24, which is connected to the cavity 20.

[0054] The airflow guiding and noise reduction component 2 extends along the front-to-back direction and contains a chamber 20. The cross-sectional area of ​​the chamber 20 varies along the front-to-back direction to adapt to the air inlet 10, thereby ensuring smoother airflow. For example, the cross-sectional area of ​​the chamber 20 may gradually increase from front to back, or gradually decrease from front to back, or gradually decrease and then gradually increase along the front-to-back direction. The shape of the silencing hole 24 is not limited; for example, the shape of the silencing hole 24 may be circular or rectangular.

[0055] In the relevant technology, airflow enters the chassis 1 from the air inlet 10. The multiple airflows entering from the air inlet 10 interfere with each other, resulting in relatively loud noise and affecting the user experience.

[0056] The following is based on Figure 3 The direction of the airflow indicated by the middle arrow illustrates the working process of the airflow guiding and noise reduction component 2 in this embodiment of the invention. Airflow enters the casing 1 from the air inlet 10. The airflow guiding and noise reduction component 2 separates the airflow entering from the air inlet 10, preventing mutual interference and thus reducing noise. Furthermore, the airflow guiding and noise reduction component 2 is equipped with silencer holes 24, which further reduce the noise generated by the airflow, resulting in a better user experience. Therefore, the airflow guiding and noise reduction component 2 in this embodiment of the invention can reduce noise during kitchen fume extraction, thereby improving the user experience.

[0057] The range hood 100 of this invention has advantages such as low noise and good user experience.

[0058] In some embodiments, such as Figure 1 As shown, the cross-sectional area of ​​the chamber 20 gradually increases along the length of the airflow guiding and noise reduction component 2. In other words, the cross-sectional area of ​​the chamber 20 gradually increases in the direction toward the rear wall 102 of the casing 1. In this embodiment of the invention, the cross-sectional area of ​​the chamber 20 of the airflow guiding and noise reduction component 2 gradually increases in the front-to-back direction so that the airflow guiding and noise reduction component 2 can be adapted to the air inlet 10 of the range hood 100, so as to facilitate smooth airflow and better airflow guiding and noise reduction effect.

[0059] In some embodiments, the flow-guiding and noise-reducing component 2 includes a first side plate 22 and a second side plate 23, the first side plate 22 and the second side plate 23 are arranged opposite to each other, and a cavity 20 is formed between the first side plate 22 and the second side plate 23, and at least a portion of at least one of the first side plate 22 and the second side plate 23 is bent toward the inside of the cavity 20.

[0060] like Figure 1 As shown, the left side of the flow guiding and noise reduction component 2 is the first side plate 22, and the right side of the flow guiding and noise reduction component 2 is the second side plate 23. The first side plate 22 and the second side plate 23 form a cavity 20.

[0061] The phrase "at least a portion of at least one of the first side plate 22 and the second side plate 23 is bent toward the inside of the cavity" means that only a portion of the first side plate 22 is bent, and the bent portion bends toward the inside of the cavity; or only a portion of the second side plate 23 is bent, and the bent portion bends toward the inside of the cavity; or both the first side plate 22 and the second side plate 23 are partially bent; or the entire first side plate 22 and the entire second side plate 23 are bent.

[0062] In the airflow guiding and noise reduction component 2 of this invention, at least a portion of at least one of the first side plate 22 and the second side plate 23 is bent toward the inside of the chamber, which facilitates a smooth change in the airflow direction, thereby reducing the vibration generated when the airflow hits the first side plate 22 or the second side plate 23, and thus reducing the noise generated when extracting fumes, so as to improve the user experience.

[0063] In some embodiments, the flow guiding and noise reduction component 2 further includes a top plate 21, the bottom of the two sides of the top plate 21 being connected to a first side plate 22 and a second side plate 23 respectively in the width direction, the first side plate 22 extending in a direction away from the top plate 21 and the second side plate 23, the second side plate 23 extending in a direction away from the top plate 21 and the first side plate 22, and the extension direction of the first side plate 22 and the extension direction of the second side plate 23 forming an angle with the thickness direction of the top plate 21.

[0064] For ease of description, the technical solution of this application will be further described below with the example that the width direction of the top plate 21 is consistent with the left-right direction and the thickness direction of the top plate 21 is consistent with the top-bottom direction. The left-right direction and the top-bottom direction are as follows: Figure 1 As shown.

[0065] like Figure 1 As shown, the top plate 21 is located between the first side plate 22 and the second side plate 23. The first side plate 22 is located on the left side of the top plate 21 and extends to the left. The extension direction of the first side plate 22 intersects with the vertical direction. The second side plate 23 is located on the right side of the top plate 21 and extends to the right. The extension direction of the second side plate 23 intersects with the vertical direction.

[0066] In the airflow guiding and noise reduction component 2 of this embodiment, the first side plate 22 and the second side plate 23 are both connected to the top plate 21. The impact force of the airflow on the first side plate 22 and the impact force of the airflow on the second side plate 23 can cancel each other out, thereby improving the stability of the airflow guiding and noise reduction component 2 and facilitating airflow guidance.

[0067] Optionally, the top plate 21, the first side plate 22, and the second side plate 23 are integrally formed.

[0068] In some embodiments, such as Figure 1As shown, at least one side plate includes a first segment 201, a second segment 202 and a third segment 203 connected in sequence in its extension direction. The first segment 201 is connected to the top plate 21. In the projection plane orthogonal to the length direction of the top plate 21, the projections of the first segment 201 and the third segment 203 are both flat planes, while the projection of the second segment 202 is an arc-shaped plane.

[0069] The meaning of "at least one side panel includes a first segment 201, a second segment 202 and a third segment 203 connected in sequence in the direction of extension" is that the first side panel 22 includes the first segment 201, the second segment 202 and the third segment 203; or the second side panel 23 includes the first segment 201, the second segment 202 and the third segment 203; or both the first side panel 22 and the second side panel 23 include the first segment 201, the second segment 202 and the third segment 203.

[0070] The projection plane orthogonal to the length direction of the top plate 21 is a plane perpendicular to the front-back direction. The fact that the projections of the first segment 201 and the third segment 203 are both flat planes means that the surfaces of the first segment 201 and the third segment 203 are planar. The fact that the projection of the second segment 202 is an arc-shaped surface means that the surface of the second segment 202 is curved.

[0071] like Figure 1 and Figure 3 As shown, taking the airflow on the left as an example, after the airflow enters from the air inlet 10, it initially flows to the right, and then, guided by the first side plate 22, gradually changes to flow upward. In this embodiment of the invention, the airflow guiding and noise reduction component 2 has a roughly curved surface on the first side plate 22, which facilitates a smooth change in the airflow direction, thereby reducing the vibration generated when the airflow hits the first side plate 22, and thus reducing the noise generated during fume extraction, thereby improving the user experience.

[0072] In some embodiments, the side of the first segment 201 away from the top plate 21 forms an angle α with the top surface of the top plate 21, and α is 5°-15°.

[0073] like Figure 1 and Figure 6 As shown, the first segment 201 extends vertically, with its upper end connected to the top plate 21 and its lower end connected to the second segment 202. The side of the first segment 201 furthest from the top plate 21 is the first side surface 2011, which is the cross-section at the lower end of the first segment 201. The angle between this cross-section and the top surface of the top plate 21 is α.

[0074] For example, the included angle α can be 5 degrees, 6 degrees, 10 degrees, 15 degrees, etc. Within the range of 5°-15°, the larger the value of the included angle α, the better the noise reduction effect of the airflow guiding and noise reduction component 2. However, when the included angle α exceeds 15 degrees, the top plate 21 will interfere with the parts on top of the top plate 21. If the airflow guiding and noise reduction component 2 is installed, it will be necessary to increase the vertical dimension of the casing 1, thereby increasing the space occupied by the range hood 100, resulting in a poor user experience. When the included angle α is less than 5 degrees, the gap between the top plate 21 and the parts on top of the top plate 21 will be too large, and the airflow entering the casing 1 will be interfered with, resulting in poor airflow guiding and noise reduction effects. In the embodiment of the present invention, the airflow guiding and noise reduction component 2, within this range, has a better airflow guiding and noise reduction effect.

[0075] Optionally, the included angle α can range from 5 degrees to 7 degrees.

[0076] In some embodiments, such as Figure 6 As shown, the side of the first segment 201 away from the top plate 21 is arranged parallel to the outer side of the panel 103. Therefore, in this embodiment, there is an angle α between the top surface of the top plate 21 and the outer side of the panel 103. Furthermore, since the air inlet 10 is located on the panel 103, the angle of inclination of the panel 103 relative to the rear wall 102 of the chassis is the same as the angle of inclination of the air inlet 10 relative to the rear wall 102 of the chassis. By having an angle α between the top surface of the top plate 21 and the air inlet 10, the airflow guidance and noise reduction effect can be improved. In some embodiments, the top plate 21 has a length direction (e.g., along the length of the airflow guidance and noise reduction component 2) Figure 1 The first and second ends of the top plate 21 are arranged opposite each other in the front-back direction, and the ratio of the width of the first end of the top plate 21 to the width of the second end of the top plate 21 is 0.5-0.7.

[0077] like Figure 1 As shown, the first end of the top plate 21 is in front of the second end. The width of the first end is L1, and the width of the second end is L2. L1 is 0.5 to 0.7 times L2, for example, L1 is 0.5, 0.6, or 0.7 times L2. The airflow guiding and noise reduction component 2 of this embodiment, by limiting the ratio of the first end and the second end of the top plate 21, facilitates the first side plate 22 to be arranged substantially parallel to the first air inlet 11, and the second side plate 23 to be arranged substantially parallel to the second air inlet 12. This promotes uniform airflow in the front-to-back direction, thereby improving the airflow guiding effect of the airflow guiding and noise reduction component 2.

[0078] In some embodiments, the second segment 202 has a length direction (e.g., along the length of the flow-guiding and noise-reducing component 2) Figure 1 The first and second ends of the second segment 202 are arranged opposite each other in the front-back direction, and the ratio of the radius of curvature of the first end of the second segment 202 to the radius of curvature of the second end of the second segment 202 is .

[0079] like Figure 1 As shown, the first end of the second segment 202 is in front of the second end. The radius of curvature of the first end of the second segment 202 is R1, and the radius of curvature of the second end of the second segment 202 is R2. R1 is 0.5 to 0.7 times R2. For example, R1 is 0.5, 0.6, or 0.7 times R2. In the flow guiding and noise reduction component 2 of this embodiment, the transition from the first end to the second end of the second segment 202 is gradual, resulting in good flow guiding effect.

[0080] In some embodiments, the extension direction of the first segment 201 forms an angle β with the thickness direction (vertical direction) of the top plate 21, and β is 0°-10°.

[0081] like Figure 1 As shown, the angle between the extension direction of the first segment 201 and the vertical direction is β. For example, the angle β is 0 degrees, 4 degrees, 10 degrees, or 2-8 degrees, etc. This embodiment of the invention includes a flow-guiding and noise-reducing component 2.

[0082] Setting an included angle β avoids direct airflow impact on the first section, thus preventing noise. This helps guide the airflow upwards, thereby improving the airflow guidance and noise reduction effect of the airflow guiding and noise reduction component 2.

[0083] In some embodiments, the top surface of the top plate 21 has a first side 211 and a second side 212 arranged opposite to each other in its width direction (left-right direction), the first side 211 and the second side 212 forming an included angle γ, and γ is 15°-20°.

[0084] like Figure 1 As shown, the first side 211 is located on the left side of the top plate 21, and the second side 212 is located on the right side of the top plate 21. The first side 211 and the second side 212 form an angle γ, for example, the angle γ is 15 degrees, 16 degrees, 19 degrees, 20 degrees, or 16-18 degrees, 16-18 degrees, etc. In the airflow guiding and noise reduction component 2 of this embodiment, the first side 211 and the second side 212 are set at an angle, which facilitates the adaptation of the first side plate 22 to the first air inlet 11 and the second side plate 23 to the second air inlet 12, which is beneficial for airflow guiding and noise reduction.

[0085] In some embodiments, such as Figure 1 As shown, the top surface of the top plate 21 is an isosceles trapezoid. In this embodiment of the invention, the top plate 21 of the airflow guiding and noise reduction component 2 is symmetrical in shape, and the spatial structure on both sides of the top plate 21 is consistent. When the left and right pots are used at the same time, the airflow entering from the left and right sides of the range hood 100 is the same in size, and there will be no situation where the airflow on one side is larger and the airflow on the other side is smaller. This is conducive to the smooth airflow guiding and noise reduction component 2 performing airflow guiding and noise reduction.

[0086] In some embodiments, there are multiple silencing holes 24, which are divided into multiple groups. The multiple groups of silencing holes 24 are arranged at intervals along the extension direction of at least one side plate. Each group of silencing holes 24 includes multiple silencing holes 24 arranged at intervals along the length direction (front-back direction) of the top plate 21.

[0087] like Figure 1 As shown, multiple sets of noise-reducing holes 24 are provided on both the first side plate 22 and the second side plate 23. These holes 24 are spaced apart along the left-right direction, and each set includes multiple holes 24 arranged at intervals. The flow-guiding noise reduction component 2 of this embodiment, with its multiple noise-reducing holes 24, can improve the noise reduction effect and enhance the user experience.

[0088] Alternatively, multiple sets of silencing holes 24 on one of the first side plate 22 and the second side plate 23 may be arranged at intervals along the left-right direction, while multiple sets of silencing holes 24 on the other side plate may be arranged along other directions, such as the front-back direction.

[0089] Optionally, the silencing hole 24 can be arranged on the first section 201, or the silencing hole 24 can be arranged on the first section 201 and the second section 202, or the silencing hole 24 can be arranged on the first section 201, the second section 202 and the third section 203.

[0090] It is understandable that the silencing holes 24 can be arranged in a matrix or in an alternating manner.

[0091] In some other embodiments, the silencing holes 24 may be arranged randomly.

[0092] In some embodiments, the spacing between adjacent silencing holes 24 is 13mm-15mm.

[0093] In some embodiments, the silencing hole 24 is a circular hole with a diameter of 2.5mm-3.5mm.

[0094] like Figure 1 As shown, the center-to-center distance between two adjacent noise reduction holes 24 is 13mm-15mm, for example, 13mm, 14mm, 15mm, etc. The airflow guiding and noise reduction component 2 of this embodiment can be designed with noise reduction holes 24 of different sizes as needed, increasing product diversity.

[0095] Optionally, the spacing between two adjacent silencing holes 24 is equal, thus making the appearance aesthetically pleasing and easy to process.

[0096] The silencing hole 24 is circular in shape. For example, the diameter of the silencing hole 24 is 2.5mm, 2.8mm, 3.2mm, 3.5mm, etc., or the diameter of the silencing hole 24 is 2.8mm-3.2mm, etc. Therefore, the circular silencing hole 24 is easy to process and reduces processing costs.

[0097] It is understood that in some other embodiments, the shape of the silencing hole 24 can be triangular, rectangular, elliptical, pentagonal, etc.

[0098] In some embodiments, the flow-guiding noise reduction component 2 further includes a sound-absorbing cotton 25 disposed within the chamber 20, and the sound-absorbing cotton 25 includes a straight section and an arc-shaped section connected to each other, the straight section being adjacent to the top plate 21 relative to the arc-shaped section, at least a portion of the straight section contacting at least one side plate, and the arc-shaped section bending toward the inside of the chamber 20.

[0099] like Figure 1 As shown, the straight section of the sound-absorbing cotton 25 is located at the upper end and close to the top plate 21, while the curved section of the sound-absorbing cotton 25 is located at the lower end. There are various ways to connect the straight section to the side plate; for example, the left side of the straight section may contact the first side plate 22, or the right side of the straight section may contact the second side plate 23, or the left side of the straight section may contact the first side plate 22 and the right side of the straight section may contact the second side plate 23. In this embodiment of the invention, the flow-guiding and noise-reducing component 2, by incorporating the sound-absorbing cotton 25, can further enhance the noise reduction capability of the range hood 100 based on the sound-absorbing holes 24, thereby improving the user experience.

[0100] In some other embodiments, both the straight section and the curved section are in contact with the side plate.

[0101] Optionally, two sound-absorbing cotton 25s are provided, and the two sound-absorbing cotton 25s are arranged opposite each other in the left-right direction. The left side of the left sound-absorbing cotton 25 contacts the first side plate 22, and the right side of the right sound-absorbing cotton 25 contacts the second side plate 23.

[0102] Alternatively, the sound-absorbing cotton 25 is made of environmentally friendly flame-retardant material.

[0103] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0104] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0105] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0106] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0107] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0108] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A flow-guiding and noise-reducing component, characterized in that, The flow-guiding noise reduction component (2) has a chamber (20) which extends along the length direction of the flow-guiding noise reduction component (2) and the cross-sectional area of ​​the chamber (20) varies along the length direction of the flow-guiding noise reduction component (2). The flow-guiding noise reduction component (2) is provided with a sound-absorbing hole (24) which communicates with the chamber (20). The flow-guiding and noise-reducing component (2) includes a top plate (21), a first side plate (22), and a second side plate (23). The first side plate (22) and the second side plate (23) are arranged opposite to each other. The cavity (20) is formed between the first side plate (22) and the second side plate (23). At least a portion of at least one of the first side plate (22) and the second side plate (23) is bent toward the inside of the cavity (20). The bottom of the top plate (21) on both sides in its width direction is connected to the first side plate (22) and the second side plate (23) respectively. The first side plate (22) extends in a direction away from the top plate (21) and the second side plate (23). The second side plate (23) extends in a direction away from the top plate (21) and the first side plate (22). The extension direction of the first side plate (22) and the extension direction of the second side plate (23) are both at an angle to the thickness direction of the top plate (21).

2. The flow guiding and noise reduction component according to claim 1, characterized in that, The cross-sectional area of ​​the chamber (20) gradually increases along the length of the flow-guiding and noise-reducing component (2).

3. The flow guiding and noise reduction component according to claim 2, characterized in that, The at least one side plate includes a first segment (201), a second segment (202) and a third segment (203) connected in sequence in its extension direction. The first segment (201) is connected to the top plate (21). In the projection plane orthogonal to the length direction of the top plate (21), the projection of the first segment (201) and the projection of the third segment (203) are both flat planes, and the projection of the second segment (202) is an arc-shaped plane.

4. The flow guiding and noise reduction component according to claim 3, characterized in that, The side of the first segment (201) away from the top plate (21) forms an angle α with the top surface of the top plate (21), and α is 5°-15°; And / or, the top plate (21) has a first end and a second end arranged opposite to each other in the length direction of the flow-guiding and noise-reducing component, and the ratio of the width of the first end of the top plate (21) to the width of the second end of the top plate (21) is 0.5-0.7; And / or, the second segment (202) has a first end and a second end arranged opposite to each other in the length direction of the flow-guiding noise reduction component, and the ratio of the radius of curvature of the first end of the second segment (202) to the radius of curvature of the second end of the second segment (202) is 0.5-0.7; And / or, the extension direction of the first segment (201) forms an angle β with the thickness direction of the top plate (21), and β is 0°-10°.

5. The flow guiding and noise reduction component according to claim 1, characterized in that, The top surface of the top plate (21) has a first side (211) and a second side (212) arranged opposite to each other in its width direction, the first side (211) and the second side (212) forming an angle γ, and γ is 15°-20°; And / or, the top surface of the top plate (21) is an isosceles trapezoid.

6. The flow-guiding and noise-reducing component according to any one of claims 3-5, characterized in that, There are multiple silencing holes (24), and the multiple silencing holes (24) are divided into multiple groups. The multiple groups of silencing holes (24) are arranged at intervals along the extension direction of the at least one side plate. Each group of silencing holes (24) includes multiple silencing holes (24) arranged at intervals along the length direction of the top plate (21).

7. The flow guiding and noise reduction component according to claim 6, characterized in that, The spacing between adjacent silencing holes (24) is 13mm-15mm; And / or, the silencing hole (24) is a circular hole, and the diameter of the silencing hole (24) is 2.5mm-3.5mm.

8. The flow-guiding and noise-reducing component according to any one of claims 3-5, characterized in that, It also includes sound-absorbing cotton (25), which is disposed in the chamber (20) and includes a straight section and an arc-shaped section connected to each other. The straight section is adjacent to the top plate (21) compared to the arc-shaped section. At least a portion of the straight section is in contact with the at least one side plate. The arc-shaped section is curved toward the inside of the chamber (20).

9. A range hood, characterized in that, include: Chassis (1); Fan (3), the fan (3) is installed inside the casing (1); A flow-guiding and noise-reducing component, wherein the flow-guiding and noise-reducing component is disposed inside the chassis and is the flow-guiding and noise-reducing component (2) as described in any one of claims 1-8.

10. The range hood according to claim 9, characterized in that, The cross-sectional area of ​​the chamber (20) gradually increases along the direction toward the rear wall (102) of the chassis (1).

11. The smoke hood according to claim 9, characterized in that, The chassis (1) includes a panel (103) with an air inlet (10) on the panel (103). The airflow guiding and noise reduction component (2) is arranged opposite to the air inlet (10) and located at the bottom of the fan (3).

12. The smoke hood according to claim 11, characterized in that, The flow-guiding and noise-reducing component (2) is the flow-guiding and noise-reducing component according to claim 3 or 4, wherein the side of the first segment (201) away from the top plate (21) is arranged parallel to the outer side of the panel (103).

13. The smoke hood according to any one of claims 9-12, characterized in that, The distance between the flow-guiding and noise-reducing component (2) and the rear wall (102) of the chassis (1) is the first distance, and the ratio between the first distance and the length of the flow-guiding and noise-reducing component (2) is 0.4-0.

7.

14. The smoke hood according to any one of claims 9-12, characterized in that, The distance between the fan (3) and the front wall (101) of the chassis is less than the distance between the fan (3) and the rear wall (102) of the chassis.

15. The smoke hood according to claim 14, characterized in that, The distance between the fan (3) and the front wall (101) of the casing (1) is the second distance, and the distance between the front wall (101) of the casing (1) and the rear wall (102) of the casing (1) is the third distance. The ratio between the second distance and the third distance is 0-0.2.

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