Range hood

Abstract

This application discloses a range hood, including a smoke collection hood, an oil collection box, and a rectifier. The smoke collection hood has a smoke guiding cavity and a smoke inlet and an exhaust outlet communicating with the smoke guiding cavity. The oil collection box is connected to the smoke collection hood and is disposed at the smoke inlet. The rectifier is disposed in the smoke guiding cavity and includes an upper rectifier portion. The upper rectifier portion contacts the cavity wall of the smoke guiding cavity on opposite sides in the front-rear direction of the smoke collection hood. The rectifier portion forms rectifier sides on opposite sides in the left-right direction of the smoke collection hood. The rectifier sides extend in the direction from the smoke inlet to the exhaust outlet, allowing the fumes to enter the exhaust outlet in an approximately parallel manner, thereby preventing the fumes from colliding at the exhaust outlet, reducing the probability of collision noise, and reducing the probability of vortex formation of fumes on both sides, thus reducing the noise of the range hood. Furthermore, since the distance between the two rectifier sides is set to decrease from the rear to the front, the rectification effect on the fumes at the rear can be improved, thereby reducing the noise of the range hood.

Description

Technical Field

[0001] This application relates to the field of home appliances, and more specifically, to a range hood. Background Technology

[0002] As people's living standards improve, the demand for protection from cooking fumes is also increasing, making range hoods an indispensable appliance for purifying the kitchen environment. However, range hoods are known for their relatively high noise levels during operation, which can be a nuisance for users. Summary of the Invention

[0003] This application provides a range hood designed to reduce noise during operation.

[0004] This application provides a range hood, including a smoke collection hood, an oil collection box, and a rectifier. The smoke collection hood has a smoke guiding cavity and a smoke inlet and an exhaust outlet communicating with the smoke guiding cavity. The oil collection box is connected to the smoke collection hood and is disposed at the smoke inlet. The rectifier is disposed in the smoke guiding cavity and includes an upper rectifier portion. The upper rectifier portion contacts the cavity wall of the smoke guiding cavity on opposite sides in the front-rear direction of the smoke collection hood. The rectifier portion forms rectifier sides on opposite sides in the left-right direction of the smoke collection hood. The rectifier sides extend in the direction from the smoke inlet to the exhaust outlet and are spaced apart from the cavity wall of the smoke guiding cavity in the left-right direction. The distance between the two rectifier sides decreases from the rear to the front.

[0005] Based on the above embodiments, after the fumes enter the smoke guiding chamber through the smoke inlet, they can be rectified by the upper rectifier of the rectifier, so that the fumes enter the exhaust port in a nearly parallel manner. This prevents the fumes from colliding at the exhaust port, reducing the probability of collision noise and thus reducing the noise of the range hood. Furthermore, since the upper rectifier can rectify the fumes into a nearly parallel manner before they enter the exhaust port, the probability of vortices forming on both sides of the fumes can be reduced, thus reducing the probability of aerodynamic noise and further reducing the noise of the range hood. Moreover, since the flow rate of fumes near the rear is larger and more concentrated than that near the front, setting the distance between the two rectifier sides to decrease from rear to front provides a better rectification effect for the larger flow rate of fumes near the rear, thereby reducing the noise of the range hood.

[0006] In some embodiments, the rectifying side includes a first side and a second side disposed opposite to each other in the front-to-back direction, and in the direction from the smoke inlet to the smoke outlet, the distance between the two first sides and the distance between the two second sides on the two rectifying sides gradually decrease.

[0007] Based on the above embodiments, since the distance between the two first sides gradually decreases and the distance between the two second sides gradually decreases in the direction from the smoke inlet to the smoke outlet, the width of the rectifier in the left and right directions near the smoke outlet gradually decreases, so that the fumes can enter the smoke outlet in an approximately parallel manner, thereby preventing the fumes from colliding at the smoke outlet, reducing the probability of collision noise, and thus reducing the noise of the range hood.

[0008] In some embodiments, the rectifier side includes at least two rectifier sub-surfaces arranged sequentially from the smoke inlet to the smoke outlet, with adjacent rectifier sub-surfaces smoothly transitioning and arranged at an angle to each other, forming a recessed structure towards the interior of the rectifier.

[0009] Based on the above embodiments, by using at least two rectifier surfaces arranged at an included angle, the direction of oil fume movement can be changed multiple times. This ensures that when the oil fume on both sides leaves the rectifier, it can enter the exhaust port in an approximately parallel manner, thereby reducing the probability of oil fume collision on both sides and the probability of oil fume generating collision noise, thus reducing the noise of the range hood.

[0010] In some embodiments, the included angle between two adjacent rectifier surfaces is a first included angle, which is greater than or equal to 130° and less than or equal to 170°.

[0011] Based on the above embodiments, when the first included angle is greater than or equal to 130° and less than or equal to 170°, it facilitates the movement of oil fumes along the rectifying surface, guiding them to the exhaust vent. Furthermore, when the oil fumes move along the rectifying surface, the probability of eddies being generated at the angle between two adjacent rectifying surfaces is reduced, thus lowering the aerodynamic noise of the oil fumes and consequently reducing the noise of the range hood. If the first included angle is less than 130°, due to the small angle between two adjacent rectifying surfaces, oil fumes are prone to generating eddies at the angle as they flow past these surfaces, easily generating aerodynamic noise and resulting in higher noise levels from the range hood. If the first included angle is greater than 170°, due to the large angle between two adjacent rectifying surfaces, the effect of the two rectifying surfaces on the oil fumes is weaker, leading to a higher probability of collisions when the oil fumes detach from the rectifying components, easily generating collision noise and resulting in higher noise levels from the range hood.

[0012] In some embodiments, the rectifier side is formed as an arc surface recessed into the interior of the rectifier.

[0013] Based on the above embodiments, the curved surface can also change the direction of oil fume movement, thereby ensuring that when the oil fume on both sides leaves the rectifier, it can enter the exhaust port in a nearly parallel manner, thereby reducing the collision noise of oil fume and thus reducing the noise of the range hood; and the curved surface is smoother, which can reduce the probability of generating eddies, thereby reducing the noise of the range hood.

[0014] In some embodiments, the rectifier further includes a plurality of wedges disposed on the rectifier side and extending toward the exhaust port. Adjacent wedges are spaced apart in a rear-to-rear direction, and the length of the wedges gradually increases toward the rear.

[0015] Based on the above embodiments, the wedge can rectify the flow of fumes passing through the rectifying side, preventing collisions between two streams of fumes when they simultaneously contact the rectifying side. This reduces the probability of eddy current generation, thereby reducing aerodynamic noise and collision noise between the two streams of fumes, ultimately lowering the noise level of the range hood. Furthermore, after the fumes enter the smoke guiding chamber, the flow rate of fumes near the rear is larger and more concentrated due to fluid convergence. Therefore, the length of the wedge gradually increases towards the rear, allowing the longer wedge at the rear to rectify the larger and more concentrated flow of fumes, thus reducing the probability of collisions and eddy current generation, further lowering the noise level of the range hood.

[0016] In some embodiments, the rectifier further includes a rectifier top surface facing the exhaust port, the rectifier top surface being connected between the two rectifier side surfaces, and the connection between the rectifier top surface and the rectifier side surfaces forming an arc structure.

[0017] Based on the above embodiments, the rectifier top surface is used to create a gap between the two rectifier sides, providing a buffer space after the fumes detach from the rectifier. This allows the fumes on both sides to make smooth contact, reducing the probability of collision noise and thus lowering the noise level of the range hood. Furthermore, the arc-shaped structure at the connection between the rectifier top surface and the two rectifier sides prevents the formation of eddies when the fumes detach from the rectifier, reducing aerodynamic noise and further lowering the aerodynamic noise of the range hood.

[0018] In some embodiments, the rectifier further includes a lower guide portion connected to the side of the upper rectifier facing the smoke inlet. The lower guide portion forms guide sides on opposite sides in the left-right direction of the smoke hood, and the guide sides and the rectifier sides are arranged at an angle.

[0019] Based on the above embodiments, the fumes entering through the corresponding air inlet are guided to the corresponding air duct by the flow-guiding side, which facilitates the movement of the fumes in the corresponding air duct. This makes it easier to rectify the fumes using the upper rectifier and the flow guide, thereby reducing the probability of eddies generated by the fumes in the air duct and the probability of collisions between the fumes in the air duct, thus reducing the noise of the range hood.

[0020] In some embodiments, the drainage side and the rectification side have a second included angle, which is greater than or equal to 105° and less than or equal to 120°.

[0021] Based on the above embodiments, the second included angle is greater than or equal to 105° and less than or equal to 120°, so that the included angle between the flow-guiding side and the flow-rectifying side matches the two flow-guiding sub-surfaces of the guide component. This facilitates the movement of oil fumes within the duct, reducing the probability of oil fumes generating eddies and thus reducing aerodynamic noise, thereby lowering the noise level of the range hood. If the second included angle is less than 105°, the distance between the flow-rectifying side and the guide component will be larger, resulting in a lower probability of the flow-rectifying side contacting the oil fumes. This leads to poor rectification of the oil fumes by the flow-rectifying side, making it easier for the oil fumes to generate aerodynamic noise, resulting in higher noise levels from the range hood. If the second included angle is greater than 120°, the distance between the flow-rectifying side and the guide component will be smaller, resulting in a narrower duct and making it easier for oil fumes to generate eddies, resulting in higher noise levels from the range hood.

[0022] In some embodiments, the drainage side includes a third side and a fourth side disposed opposite each other in the front-back direction, and in the direction from the smoke inlet to the smoke outlet, the distance between the two third sides and the distance between the two fourth sides on the two drainage sides gradually increases.

[0023] Based on the above embodiments, the distance between the two third sides and the distance between the two fourth sides on the two drainage sides gradually increase, so that the drainage sides can guide the oil fumes entering through the corresponding smoke inlets to the corresponding air ducts, thereby facilitating the movement of oil fumes in the corresponding air ducts, so as to make it easier to use the upper rectifier to rectify the oil fumes, thereby reducing the noise of the range hood.

[0024] In some embodiments, the third side is positioned forward relative to the fourth side. On the side closer to the smoke inlet, the distance between the two third sides is a first distance, and the distance between the two fourth sides is a second distance. The ratio of the first distance to the second distance is greater than or equal to 0.5 and less than or equal to 0.8.

[0025] Based on the above embodiments, the ratio of the first distance to the second distance is greater than or equal to 0.5 and less than or equal to 0.8. This facilitates the guidance of fumes into the duct from the flow-in side and the rectification of fumes from the flow-out side, thereby reducing the probability of vortex formation and aerodynamic noise, and ultimately reducing the noise of the range hood. If the ratio of the first distance to the second distance is less than 0.5 or greater than 0.8, the probability of vortex formation when fumes move in the duct is higher, resulting in higher noise levels from the range hood.

[0026] In some embodiments, the range hood further includes two guide elements, which are disposed inside the smoke collection hood and located on opposite sides of the smoke exhaust port, and are spaced apart from the rectifier. The two opposing surfaces of the two guide elements cooperate with the inner wall of the smoke collection hood to form a smoke guiding cavity, and the rectifier divides the smoke guiding cavity to form at least two air ducts.

[0027] Based on the above embodiments, after the fumes enter the smoke guiding chamber through the smoke inlet, they can be guided by the guide surfaces on both sides to enter the smoke exhaust port, thereby preventing the fumes from generating eddies in the smoke guiding chamber, reducing the probability of noise generation, and thus reducing the noise of the range hood.

[0028] In some embodiments, the two guide elements have guide surfaces extending toward the exhaust port, the two guide surfaces are configured to be close to or far from each other, the guide surface includes at least two guide sub-surfaces connected in sequence, an included angle is formed between adjacent guide sub-surfaces on a guide element, or the guide surface is an arc surface.

[0029] Based on the above embodiments, since there is an included angle between two adjacent guide surfaces, the radiation direction of noise can be changed multiple times, thereby reducing the directional radiation of noise and further reducing the noise of the range hood, so that users do not have noise problems when using the range hood and have a better user experience.

[0030] In some embodiments, the flow guide includes at least two flow guide subplates connected in sequence, each flow guide subplate having a flow guide surface; and / or, there is a smooth transition between two adjacent flow guide surfaces.

[0031] Based on the above embodiments, the guide vanes can be bent to form adjacent guide vanes at an angle, thus reducing the number of manufacturing steps for the guide vanes and lowering their manufacturing cost, thereby reducing the overall manufacturing cost of the range hood. Furthermore, forming the guide vanes from sheet metal reduces their weight, thus reducing the overall weight of the range hood and facilitating installation. A smooth transition between adjacent guide vanes reduces the resistance to the movement of fumes on the guide surface, lowering the probability of aerodynamic noise during fume movement. This smooth transition also facilitates the movement of fumes along the guide surface, guiding them to the exhaust vent. Additionally, it reduces the probability of eddy currents generated during fume movement, further reducing noise.

[0032] According to this application, after the fumes enter the smoke guiding chamber through the smoke inlet, they can be rectified by the upper rectifier of the rectifier so that the fumes enter the exhaust port in an approximately parallel manner, thereby preventing the fumes from colliding at the exhaust port and reducing the probability of collision noise, thus reducing the noise of the range hood; and since the upper rectifier can rectify the fumes into an approximately parallel manner before entering the exhaust port, the probability of vortex formation of fumes on both sides can be reduced, thereby reducing the probability of aerodynamic noise, and further reducing the noise of the range hood. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a range hood in one embodiment of this application;

[0035] Figure 2 For along Figure 1 A schematic diagram of the cross-sectional structure of the AA surface in the middle;

[0036] Figure 3 This is a partial structural diagram of a range hood in one embodiment of this application;

[0037] Figure 4 This is a schematic diagram of the rectifier structure in one embodiment of this application;

[0038] Figure 5 This is a structural schematic diagram of the rectifier from another perspective in one embodiment of this application.

[0039] Explanation of reference numerals in the attached drawings: 1. Range hood; 11. Smoke hood; 11A. Cavity; 11B. Smoke inlet; 11C. Smoke outlet; 11D. Smoke guide chamber; 11F. Air duct; 12. Fan assembly; 13. Guide component; 13A. Guide surface; 131. Guide plate; 131A. Guide surface; 16. Rectifier; 161. Upper rectifying part; 161A. Rectifying side; 1611A. First side; 1611B. Second side; 1612A. Rectifying surface; 161B. Rectifying top surface; 162. Wedge; 163. Lower drainage part; 163A. Drainage side; 1631A. Third side; 1631B. Fourth side; α1. First included angle; α2. Second included angle; L1. First distance; L2. Second distance. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0041] Please refer to Figure 1 and Figure 2 This application provides a range hood 1, which includes a smoke collection hood 11, a fan assembly 12, and an oil collection box (not shown in the figure).

[0042] The fume hood 11 has a cavity 11A and a smoke inlet 11B and a smoke outlet 11C communicating with the cavity 11A. The cavity 11A of the fume hood 11 can collect the fumes entering from the smoke inlet 11B and guide the fumes to the smoke outlet 11C. The fume hood 11 may be made of metal or plastic, but is not limited to. For example, the fume hood 11 may be made of metal to improve the structural strength of the fume hood 11, thereby extending the service life of the range hood 1. For example, the fume hood 11 may have two smoke inlets 11B, both of which are communicating with the cavity 11A, and each smoke inlet 11B corresponds to one cooking appliance, so that the fumes generated by each cooking appliance can enter the cavity 11A from the corresponding smoke inlet 11B, thereby improving the fume extraction efficiency.

[0043] The fan assembly 12 is connected to the fume hood 11 and communicates with the exhaust port 11C. When the fan assembly 12 is working, the air in the cavity 11A can be drawn out through the exhaust port 11C, thereby creating a negative pressure in the cavity 11A, so that the fume hood 11 can absorb the oil fumes generated by the cookware through the smoke inlet 11B.

[0044] The oil collection box is detachably connected to the smoke hood 11 and is located at the smoke inlet 11B. It is used to collect the condensed oil in the smoke hood 11 to prevent the condensed oil from dripping onto the table surface and to ensure that the table surface is clean and tidy.

[0045] Please refer to Figure 1 and Figure 2The range hood 1 also includes two guide members 13, which are disposed within the cavity 11A and located on opposite sides of the exhaust port 11C. Each guide member 13 includes a guide surface 13A extending towards the exhaust port 11C. The guide surface 13A guides the movement of fumes entering the smoke guiding cavity 11D from the smoke inlet 11B. The guide surfaces 13A on the two guide members 13 face each other and cooperate with the inner wall of the smoke collection hood 11 to form the smoke guiding cavity 11D, which is open from the smoke inlet 11B to the exhaust port 11C. Exemplarily, the guide member 13 may be, but is not limited to, sheet metal or a solid column. In this embodiment, the specific form of the guide member 13 is not limited. Exemplarily, the material of the guide member 13 may be, but is not limited to, plastic or metal. In this embodiment, the material of the guide member 13 is not limited. For example, the guide 13 can be made of metal to give it high structural strength, thereby ensuring a stable connection between the guide 13 and the smoke hood 11.

[0046] Please refer to Figure 1 and Figure 2 In one specific embodiment, the two guide surfaces 13A can be configured to be far apart from each other, thereby guiding the oil fumes to move along the guide surfaces 13A to prevent the oil fumes from generating eddies in the smoke guiding cavity 11D, thereby reducing the probability of noise generation and thus reducing the noise of the range hood 1.

[0047] Please refer to Figure 2 and Figure 3 Specifically, the guide surface 13A may include at least two guide sub-surfaces 131A connected in sequence. Adjacent guide sub-surfaces 131A on a guide member 13 form an included angle. As shown in the figure, the two guide sub-surfaces 131A are set at an obtuse angle greater than 90 degrees, resulting in the guide surfaces 13A on the two guide members 13 being concave in opposite directions. In this case, the two guide surfaces 13A are positioned far apart from each other. This embodiment, by setting adjacent guide sub-surfaces 131A at an included angle, can guide the movement of oil fumes and radiate aerodynamic noise generated during the movement in multiple directions, thereby reducing the directional radiation of aerodynamic noise and thus lowering the noise of the range hood 1. For example, the guide surface 13A may include two guide sub-surfaces 131A connected in sequence; of course, the guide surface 13A may also include three guide sub-surfaces 131A connected in sequence. It is understandable that the guide surface 13A on the guide component 13 can also be an arc surface, so as to guide the oil fumes more smoothly, thereby reducing the probability of aerodynamic noise generation and thus reducing the noise of the range hood 1.

[0048] It is understandable that the guide surfaces 13A on the two guide members 13 can also be configured to be close to each other, that is, in Figure 2 and Figure 3Based on this, the two guide surfaces 131A can be set at an obtuse angle greater than 90 degrees, and the sharp angles formed by the two guide surfaces 131A are facing each other, thus forming a state of "approaching each other". In this embodiment, the oil fumes guided by the guide surface 13A can enter the exhaust port 11C in a nearly parallel flow path on both sides of the exhaust port 11C, thereby preventing the oil fumes on both sides from colliding with each other at the exhaust port 11C, thereby reducing the probability of collision noise and reducing the noise of the range hood 1.

[0049] Please refer to Figure 2 and Figure 3 In one specific embodiment, the flow guide 13 can be a sheet metal part, comprising at least two sequentially connected flow guide sub-plates 131, each flow guide sub-plate 131 having a flow guide surface 131A. The flow guide sub-plates 131 can be bent to form an angle between adjacent flow guide sub-plates 131, thereby also forming an angle between adjacent flow guide surfaces 131A. This reduces the number of manufacturing steps for the flow guide 13, thus lowering its manufacturing cost and consequently reducing the overall manufacturing cost of the range hood 1. Furthermore, forming the flow guide 13 from sheet metal can reduce its weight, thereby reducing the overall weight of the range hood 1 and facilitating its installation.

[0050] Please refer to Figure 2 and Figure 3 In one specific embodiment, the smooth transition between two adjacent guide surfaces 131A can reduce the movement resistance of oil fumes on the guide surface 13A, thereby reducing the probability of aerodynamic noise generated when oil fumes move and reducing the noise of the range hood 1. Furthermore, the smooth transition between two adjacent guide surfaces 131A also facilitates the movement of oil fumes along the guide surface 13A, so as to guide the oil fumes to the exhaust port 11C. And when oil fumes move along the guide surface 13A, the probability of eddy current generation can be reduced, thereby reducing the noise of the range hood 1.

[0051] Please refer to Figure 2-4In one specific embodiment, the range hood 1 further includes a rectifier 16 disposed within the smoke guiding cavity 11D. The rectifier 16 includes an upper rectifier 161, which contacts the cavity wall of the smoke guiding cavity 11D on opposite sides in the front-rear direction of the smoke collecting hood 11. The rectifier 16 forms rectifier sides 161A on opposite sides in the left-right direction of the smoke collecting hood 11. The rectifier sides 161A extend in the direction from the smoke inlet 11B to the smoke outlet 11C and are spaced apart from the cavity wall of the smoke guiding cavity 11D in the left-right direction. The rectifier sides 161A can rectify the fumes entering the smoke guiding cavity 11D from the smoke inlet 11B, so that the fumes can enter the smoke outlet 11C in an approximately parallel manner, thereby preventing the fumes from colliding at the smoke outlet 11C, reducing the probability of collision noise, and thus reducing the noise of the range hood 1. For example, the rectifier 16 may be made of plastic or metal, and the connection between the rectifier 16 and the wall of the smoke guiding chamber 11D may be, but is not limited to, screwing, snap-fitting, gluing, or riveting. For example, the rectifier 16 may be made of metal to give it high structural strength, thereby reducing the probability of deformation and ensuring that the rectifier 16 can rectify the oil fume.

[0052] In this embodiment, after the fumes enter the smoke guiding cavity 11D through the smoke inlet 11B, they can be rectified by the upper rectifier 161 of the rectifier 16 so that the fumes enter the exhaust outlet 11C in an approximately parallel manner, thereby preventing the fumes from colliding at the exhaust outlet 11C and reducing the probability of collision noise, thus reducing the noise of the range hood 1; and since the upper rectifier 161 can rectify the fumes into an approximately parallel manner to enter the exhaust outlet 11C, the probability of vortex formation of fumes on both sides can be reduced, thereby reducing the probability of aerodynamic noise, and further reducing the noise of the range hood 1.

[0053] Please refer to Figure 3 and Figure 4 Furthermore, since the flow rate of oil fumes near the rear of the smoke guiding chamber 11D is larger and more concentrated than the flow rate near the front of the smoke guiding chamber 11D, the distance between the two rectifier sides 161A is set to decrease from the rear to the front, thereby enabling better rectification of the larger flow rate of oil fumes near the rear, thus reducing the noise of the range hood 1.

[0054] It is understood that the range hood 1 may include a rectifier 16 to divide the smoke guiding chamber 11D into two air ducts 11F, thereby increasing the negative pressure within each air duct 11F and improving the smoke extraction effect of the range hood 1. It is also understood that the range hood 1 may include two rectifiers 16, spaced apart, to divide the smoke guiding chamber 11D into three air ducts 11F. Of course, the range hood 1 may also include three rectifiers 16, spaced apart between adjacent rectifiers 16, to divide the smoke guiding chamber 11D into four air ducts 11F. In this embodiment, the number of rectifiers 16 is not specifically limited and can be selected according to design requirements.

[0055] Please refer to Figure 3 and Figure 4 In one specific embodiment, the rectifier side 161A includes a first side 1611A and a second side 1611B arranged opposite each other in the front-back direction. In the direction from the smoke inlet 11B to the smoke outlet 11C, the distance between the two first sides 1611A and the distance between the two second sides 1611B on the two rectifier sides 161A gradually decreases. This allows the width of the rectifier 16 in the left-right direction to gradually decrease in the direction close to the smoke outlet 11C, so as to guide the fumes into the smoke outlet 11C and allow the fumes to enter the smoke outlet 11C in an approximately parallel manner, thereby preventing the fumes from colliding at the smoke outlet 11C, reducing the probability of collision noise, and thus reducing the noise of the range hood 1.

[0056] Please refer to Figure 3 and Figure 4 In one specific embodiment, the rectifying side 161A includes at least two rectifying sub-surfaces 1612A arranged sequentially from the smoke inlet 11B to the smoke outlet 11C. Adjacent rectifying sub-surfaces 1612A transition smoothly and are angled together, forming a recessed structure towards the interior of the rectifying element 16. By utilizing at least two angled rectifying sub-surfaces 1612A, the direction of oil fume movement can be changed multiple times, ensuring that the oil fume on both sides, after leaving the rectifying element 16, enters the smoke outlet 11C in an approximately parallel manner. This reduces the probability of collision between the oil fume on both sides, lowers the probability of collision noise, and thus reduces the noise of the range hood 1. For example, the rectifying side 161A may include two rectifying sub-surfaces 1612A, which transition smoothly and are angled together. For example, the rectifier side 161A may also include three rectifier sub-surfaces 1612A, with a smooth transition between two adjacent rectifier sub-surfaces 1612A and arranged at an angle.

[0057] Please refer to Figure 3-5Specifically, the included angle between two adjacent rectifier surfaces 1612A is the first included angle α1. When the first included angle α1 is greater than or equal to 130° and less than or equal to 170°, it facilitates the movement of oil fumes along the rectifier side 161A, so as to guide the oil fumes to the exhaust port 11C. Furthermore, when the oil fumes move along the rectifier side 161A, it can reduce the probability of vortices being generated at the included angle between the two adjacent rectifier surfaces 1612A, thereby reducing the aerodynamic noise of the oil fumes and thus reducing the noise of the range hood 1. If the first included angle α1 is less than 130°, since the included angle between the two adjacent rectifier surfaces 1612A is small, oil fumes are more likely to generate vortices at the included angle when flowing through the two adjacent rectifier surfaces 1612A, which easily generates aerodynamic noise, resulting in higher noise of the range hood 1. If the first included angle α1 is greater than 170°, the included angle between the two adjacent rectifier surfaces 1612A will be large, which will result in a weaker effect of the two adjacent rectifier surfaces 1612A on the two rectifications of the oil fumes. As a result, the probability of the oil fumes colliding when they leave the rectifier 16 is high, which will easily generate collision noise and make the range hood 1 noisier.

[0058] Understandably, the rectifier side 161A can also be formed as an arc surface recessed into the rectifier 16. This arc surface can also be used to change the direction of the oil fumes, ensuring that the oil fumes on both sides, after leaving the rectifier 16, enter the exhaust port 11C in an approximately parallel manner. This reduces the collision noise of the oil fumes, thereby reducing the noise of the range hood 1. Furthermore, setting the rectifier side 161A as an arc surface makes it smoother, reducing the probability of eddies being generated on the rectifier side 161A, thus reducing the aerodynamic noise of the oil fumes and further reducing the noise of the range hood 1.

[0059] Please refer to Figure 3-5In one specific embodiment, the rectifier 16 further includes a plurality of wedges 162, which are disposed on the rectifier side 161A and extend toward the exhaust port 11C. Adjacent wedges 162 are spaced apart in a back-to-back direction. The wedges 162 can rectify the oil fumes flowing through the rectifier side 161A, preventing collisions between the two streams of oil fumes when they simultaneously contact the rectifier side 161A, thereby reducing the probability of collision noise and thus reducing the noise of the range hood 1. Furthermore, by using the wedges 162 to prevent collisions between the two streams of oil fumes, the probability of eddies generated between them can also be reduced, thereby reducing the aerodynamic noise of the oil fumes and further reducing the noise of the range hood 1. Exemplarily, the wedges 162 can be formed separately and then connected to the rectifier 16. The connection method can be, but is not limited to, screwing, snap-fitting, gluing, or riveting. For example, the wedge portion 162 may also be integrally formed with the rectifier 16. In the embodiments of this application, there is no limitation on the specific form of connection between the wedge portion 162 and the rectifier 16.

[0060] Please refer to Figure 3-5 Furthermore, after the fumes enter the smoke guiding chamber 11D, due to the convergence of the fluid, the flow rate of the fumes near the rear is larger and more concentrated than that near the front. Therefore, the length of the wedge 162 gradually increases towards the rear, so that the longer wedge 162 near the rear can rectify the larger and more concentrated flow of fumes, thereby reducing the probability of fumes colliding at the rear and the probability of fumes generating eddies at the rear, thus reducing the noise of the range hood 1.

[0061] Please refer to Figure 3 and Figure 4 In one specific embodiment, the rectifier 16 further includes a rectifier top surface 161B facing the exhaust port 11C. The rectifier top surface 161B is connected between the two rectifier side surfaces 161A. The rectifier top surface 161B is used to make the two rectifier side surfaces 161A spaced apart, so that after the oil fumes on both sides leave the rectifier 16, there is still a buffer space between the oil fumes on both sides, so that the oil fumes on both sides can make stable contact and enter the exhaust port 11C in an approximately parallel manner, thereby reducing the probability of collision noise generated by the oil fumes on both sides, and thus reducing the noise of the range hood 1.

[0062] Please refer to Figure 3 and Figure 4 Furthermore, the connection between the top surface 161B and the sides 161A of the rectifier is formed with an arc structure, which can prevent the oil fumes from generating eddies when they leave the rectifier 16, thereby reducing the aerodynamic noise of the oil fumes and further reducing the noise of the range hood 1.

[0063] Please refer to Figure 3 and Figure 4 In one specific embodiment, the rectifier 16 further includes a lower guide portion 163, which is connected to the side of the upper rectifier 161 facing the smoke inlet 11B. The lower guide portion 163 forms guide side surfaces 163A on opposite sides in the left-right direction of the smoke collection hood 11. The guide side surfaces 163A and the rectifier side surfaces 161A are set at an angle. The guide side surfaces 163A guide the oil fumes entering through the corresponding smoke inlet 11B to the corresponding air duct 11F, thereby facilitating the movement of oil fumes in the corresponding air duct 11F. This makes it easier to rectify the oil fumes using the upper rectifier 161 and the guide component 13, thereby reducing the probability of oil fumes generating eddies in the air duct 11F and the probability of oil fumes colliding in the air duct 11F, thus reducing the noise of the range hood 1.

[0064] Please refer to Figure 3-5 In one specific embodiment, the flow-guiding side 163A and the rectification side 161A have a second included angle α2, which is greater than or equal to 105° and less than or equal to 120°. This angle α2 is such that the included angle between the flow-guiding side 163A and the rectification side 161A matches the two guide surfaces 131A of the guide member 13, thereby facilitating the movement of oil fumes within the duct 11F, reducing the probability of oil fumes generating eddies, and thus reducing the aerodynamic noise of the oil fumes, thereby reducing the noise of the range hood 1. If the second included angle α2 is less than 105°, the distance between the rectification side 161A and the guide member 13 will be larger, resulting in a lower probability that the rectification side 161A comes into contact with the oil fumes. This leads to a poor rectification effect of the rectification side 161A on the oil fumes, making it easier for the oil fumes to generate aerodynamic noise, resulting in higher noise levels in the range hood 1. If the second included angle α2 is greater than 120°, the distance between the rectifier side 161A and the guide component 13 will be too close, resulting in a narrower air duct 11F. This will easily cause the oil fumes to generate eddies, resulting in a louder noise from the range hood 1.

[0065] Please refer to Figure 3-5 In one specific embodiment, the flow-guiding side 163A includes a third side 1631A and a fourth side 1631B arranged opposite to each other in the front-back direction. In the direction from the smoke inlet 11B to the smoke outlet 11C, the distance between the two third sides 1631A and the distance between the two fourth sides 1631B on the two flow-guiding sides 163A gradually increases, so that the flow-guiding side 163A can guide the oil fumes entering through the corresponding smoke inlet 11B to the corresponding air duct 11F, thereby facilitating the movement of oil fumes in the corresponding air duct 11F, so as to utilize the upper rectifier 161 to rectify the oil fumes, thereby reducing the noise of the range hood 1.

[0066] Please refer to Figure 3-5In one specific embodiment, the third side 1631A is positioned forward of the fourth side 1631B, near the smoke inlet 11B. The distance between the two third sides 1631A is a first distance L1, and the distance between the two fourth sides 1631B is a second distance L2. The ratio of the first distance L1 to the second distance L2 is greater than or equal to 0.5 and less than or equal to 0.8. This facilitates the guiding side 163A in guiding the fumes into the duct 11F and also facilitates the rectifying side 161A in rectifying the fumes, thereby reducing the probability of vortex formation and aerodynamic noise, and ultimately reducing the noise of the range hood 1. If the ratio of the first distance L1 to the second distance L2 is less than 0.5, or greater than 0.8, the probability of vortex formation when the fumes move in the duct 11F is higher, resulting in higher noise levels from the range hood 1.

[0067] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0068] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A range hood, characterized in that, include: A smoke hood has a smoke guiding chamber and a smoke inlet and a smoke outlet communicating with the smoke guiding chamber; An oil collection box is connected to the smoke collection hood and is located at the smoke inlet; as well as A rectifier is disposed within the smoke guiding cavity. The rectifier includes an upper rectifier portion, which contacts the cavity wall of the smoke guiding cavity on opposite sides in the front-rear direction of the smoke collecting hood. The rectifier has rectifier side surfaces on opposite sides in the left-right direction of the smoke collecting hood. The rectifier side surfaces extend in the direction from the smoke inlet to the smoke outlet and are spaced apart from the cavity wall of the smoke guiding cavity in the left-right direction. The distance between the two rectifier side surfaces decreases from the rear to the front. The rectifying side includes a first side and a second side arranged opposite to each other in the front-back direction. In the direction from the smoke inlet to the smoke outlet, the distance between the two first sides and the distance between the two second sides on the two rectifying sides gradually decrease. The rectifier also includes a lower flow guide, which is connected to the side of the upper rectifier facing the smoke inlet. The lower flow guide forms flow guide sides on opposite sides in the left-right direction of the smoke hood, and the flow guide sides and the rectifier sides are set at an angle. The drainage side includes a third side and a fourth side arranged opposite to each other in the front-back direction. In the direction from the smoke inlet to the smoke outlet, the distance between the two third sides and the distance between the two fourth sides on the two drainage sides gradually increase.

2. The range hood as described in claim 1, characterized in that, The rectifying side includes at least two rectifying sub-surfaces arranged sequentially from the smoke inlet to the smoke outlet. Adjacent rectifying sub-surfaces are smoothly transitioned and are arranged at an angle to each other, forming a recessed structure towards the interior of the rectifying element.

3. The range hood as described in claim 2, characterized in that, The included angle between two adjacent rectifier surfaces is the first included angle, which is greater than or equal to 130° and less than or equal to 170°.

4. The range hood as described in claim 1, characterized in that, The rectifier side is formed as an arc surface that is recessed into the interior of the rectifier.

5. The range hood as described in claim 1, characterized in that, The rectifier also includes: Multiple wedges are disposed on the rectifying side and extend toward the exhaust port. Adjacent wedges are spaced apart in the front-rear direction, and the length of the wedges gradually increases toward the rear.

6. The range hood as described in claim 1, characterized in that, The rectifier also includes a top rectifier surface facing the exhaust port, the top rectifier surface being connected between the two side rectifier surfaces, and the connection between the top rectifier surface and the side rectifier surfaces forming an arc structure.

7. The range hood as described in claim 1, characterized in that, The drainage side and the rectification side have a second included angle, which is greater than or equal to 105° and less than or equal to 120°.

8. The range hood as described in claim 1, characterized in that, The third side is forward of the fourth side and is located near the smoke inlet. The distance between the two third sides is the first distance, and the distance between the two fourth sides is the second distance. The ratio of the first distance to the second distance is greater than or equal to 0.5 and less than or equal to 0.

8.

9. The range hood according to any one of claims 1-8, characterized in that, Also includes: Two flow guides are disposed inside the smoke collection hood and located on opposite sides of the smoke exhaust port, and are spaced apart from the rectifier. The two opposing surfaces of the two flow guides cooperate with the inner wall of the smoke collection hood to form the smoke guiding cavity. The rectifier separates the smoke guiding cavity to form at least two air ducts.

10. The range hood as described in claim 9, characterized in that, The two guide members have guide surfaces extending toward the exhaust port, the two guide surfaces are configured to be close to or far from each other, the guide surface includes at least two guide sub-surfaces connected in sequence, an included angle is formed between adjacent guide sub-surfaces on one of the guide members, or the guide surface is an arc surface.

11. The range hood as described in claim 10, characterized in that, The flow guide includes at least two flow guide sub-plates connected in sequence, each of the flow guide sub-plates having the flow guide surface; and / or, There is a smooth transition between two adjacent flow guide surfaces.

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