CN220321385U - Fume exhaust fan - Google Patents

Abstract

The embodiment of the application discloses a range hood, which comprises a fume collecting hood and a rectifying piece, wherein the fume collecting hood is provided with a fume guiding cavity, and a fume inlet and a fume outlet which are communicated with the fume guiding cavity; the rectifier piece sets up in the smoke guide chamber, the rectifier piece includes the upper fairing portion, upper fairing portion is in the front and back ascending opposite sides of collection petticoat pipe respectively with the chamber wall contact in smoke guide chamber, the rectifier piece is formed with the rectification side in the left and right sides of collection petticoat pipe ascending opposite sides, the rectification side extends in the direction of inlet to the exhaust port for the oil smoke can get into the exhaust port in approximately parallel mode, thereby prevents that the oil smoke from colliding in exhaust port department, in order to reduce the probability that produces collision noise, and can reduce the probability that both sides oil smoke produced the vortex, reduce the noise of lampblack absorber. Further, since the distance between the two rectifying side surfaces is set to be smaller from the rear to the front, the rectifying effect on the rear lampblack can be improved, and the noise of the range hood can be reduced.

Description

Fume exhaust fan

Technical Field

The application relates to the field of household appliances, in particular to a range hood.

Background

With the improvement of the living standard of people, the demands for avoiding the damage of oil smoke in the cooking process are increasing, and the range hood gradually becomes an essential household appliance for purifying the kitchen environment. In the related technical field, the range hood has large noise during operation, and noise annoyance is easily caused to users.

Disclosure of Invention

The embodiment of the application provides a range hood, and aims to reduce noise when the range hood operates.

The embodiment of the application provides a range hood, which comprises a fume collecting hood and a rectifying piece, wherein the fume collecting hood is provided with a fume guiding cavity, and a fume inlet and a fume outlet which are communicated with the fume guiding cavity; the rectification piece sets up in the smoke guide chamber, and the rectification piece includes the upper rectification portion, and upper rectification portion is in the front and back orientation of collection petticoat pipe opposite sides and the chamber wall contact in smoke guide chamber respectively, and upper rectification portion is formed with the rectification side in the left and right orientation of collection petticoat pipe opposite sides, and the rectification side extends in the direction of inlet to the exhaust port, and in the left and right orientation with the chamber wall interval setting in smoke guide chamber, the distance between two rectification sides diminishes the setting from the rear to the place ahead.

Based on the embodiment, after the oil smoke enters the smoke guide cavity through the smoke inlet, the oil smoke can be rectified through the upper rectifying part of the rectifying piece, so that the oil smoke enters the smoke outlet in an approximately parallel mode, the oil smoke is prevented from colliding at the smoke outlet, the probability of collision noise is reduced, and the noise of the range hood is reduced; and because the upper rectifying part can rectify the oil smoke into a mode which is approximately parallel to enter the smoke outlet, the probability of vortex generation of the oil smoke at two sides can be reduced, the probability of pneumatic noise generation can be reduced, and the noise of the range hood can be further reduced. Further, because the flow of the oil smoke at the position close to the rear is larger and more concentrated than the flow at the position close to the front, the distance between the two rectifying side faces is set to be smaller from the rear to the front, and then the oil smoke at the larger flow close to the rear can be rectified better, the rectifying effect can be improved, and the noise of the range hood is reduced.

In some embodiments, the rectifying side surface includes a first edge and a second edge which are opposite to each other in the front-rear direction, and the distance between the two first edges and the distance between the two second edges on the two rectifying side surfaces are gradually reduced in the direction from the smoke inlet to the smoke outlet.

Based on the above embodiment, since the distance between the two first sides is gradually reduced in the direction from the smoke inlet to the smoke outlet and the distance between the two second sides is gradually reduced, the width of the rectifying member in the left-right direction is gradually reduced in the direction close to the smoke outlet, so that the smoke can enter the smoke outlet in an approximately parallel manner, and further, the smoke is prevented from colliding at the smoke outlet, the probability of collision noise is reduced, and the noise of the smoke ventilator is reduced.

In some embodiments, the rectifying side surface includes at least two rectifying surfaces sequentially arranged in a direction from the smoke inlet to the smoke outlet, and two adjacent rectifying surfaces are smooth and excessive, are arranged at an included angle, and form an inward concave structure toward the rectifying part.

Based on the above embodiment, by using at least two rectifying surfaces arranged at an included angle, the movement direction of the oil smoke can be changed for many times, so that when the oil smoke on two sides is separated from the rectifying part, the oil smoke can enter the smoke outlet in an approximately parallel mode, the collision probability of the oil smoke on two sides can be reduced, the collision noise probability of the oil smoke is reduced, and the noise of the range hood is reduced.

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

Based on the above embodiment, when the first included angle is greater than or equal to 130 ° and less than or equal to 170 °, the oil smoke can move along the rectifying surface so as to guide the oil smoke to the smoke outlet, and when the oil smoke moves along the rectifying surface, the probability of generating vortex at the included angle of two adjacent rectifying surfaces can be reduced so as to reduce the pneumatic noise of the oil smoke, thereby reducing the noise of the range hood. If the first included angle is smaller than 130 degrees, because the included angle between two adjacent rectifying surfaces is smaller, vortex is easy to generate at the included angle when the lampblack flows through the two adjacent rectifying surfaces, pneumatic noise is easy to generate, and the noise of the lampblack absorber is larger. If the first included angle is larger than 170 degrees, the included angle between the two adjacent rectifying surfaces is larger, so that the two adjacent rectifying surfaces have weaker rectifying effect on the oil smoke twice, the probability of collision is higher when the oil smoke is separated from the rectifying part, collision noise is easy to generate, and the noise of the range hood is larger.

In some of these embodiments, the rectifying side is formed as a cambered surface recessed toward the interior of the rectifying member.

Based on the embodiment, the movement direction of the oil smoke can be changed by utilizing the cambered surface, so that when the oil smoke at two sides is separated from the rectifying piece, the oil smoke can enter the smoke outlet in a nearly parallel mode, and then the collision noise of the oil smoke can be reduced, so that the noise of the range hood is reduced; and the cambered surface is smoother, so that the probability of generating vortex can be reduced, and the noise of the range hood is reduced.

In some embodiments, the rectifying piece further includes a plurality of wedges, the plurality of wedges are disposed on the rectifying side surface and extend toward the direction of the smoke exhaust port, two adjacent wedges are disposed at intervals in the front-rear direction, and the lengths of the wedges gradually increase in the direction approaching to the rear direction.

Based on the embodiment, the lampblack flowing through the rectifying side face can be rectified by the wedge part, so that collision between two lampblack is prevented when the two lampblack are contacted with the rectifying side face at the same time, the probability of vortex generation is reduced, pneumatic noise is reduced, collision noise generated between the two lampblack can be reduced, and noise of the range hood is reduced. Further, because the oil smoke is in getting into the smoke guide cavity after, owing to the effect of gathering of fluid, can make the oil smoke flow that is close to the rear great, more concentrate to increase gradually in the length that is close to the rear with wedge portion, thereby make the longer wedge portion that is close to the rear can flow great, more concentrate the oil smoke and rectify, so that the oil smoke of rear bump probability is lower, also make the oil smoke of rear produce the probability of vortex lower, and then reduce the noise of lampblack absorber.

In some embodiments, the rectifying part further comprises a rectifying top surface arranged towards the smoke outlet, the rectifying top surface is connected between the two rectifying side surfaces, and the connection part of the rectifying top surface and the rectifying side surfaces forms an arc structure.

Based on the above embodiment, the rectifying top surface is utilized to enable the rectifying side surfaces on two sides to be arranged at intervals, so that after the lampblack is separated from the rectifying piece, a buffer space exists, the lampblack on two sides can be in stable contact, the probability that the lampblack on two sides generates collision noise is reduced, and the noise of the range hood is reduced. And, because the junction of rectification top surface and the rectification side of both sides is formed with the circular arc structure to can prevent that the oil smoke from producing the vortex when breaking away from the rectification piece, with the pneumatic noise of reduction oil smoke, and then further reduce the pneumatic noise of lampblack absorber.

In some embodiments, the rectifying piece further comprises a lower drainage part, the lower drainage part is connected to one side of the upper rectifying part facing the smoke inlet, drainage side faces are formed on two opposite sides of the lower drainage part in the left-right direction of the smoke collecting cover, and the drainage side faces and the rectification side faces are arranged in an included angle.

Based on the above embodiment, the oil smoke entering through the corresponding air inlet is guided into the corresponding air channel by utilizing the drainage side surface, so that the oil smoke can move in the corresponding air channel conveniently, the oil smoke can be rectified by utilizing the upper rectifying part conveniently, the oil smoke can be rectified by utilizing the flow guide piece conveniently, the probability of vortex generated by the oil smoke in the air channel can be reduced, the probability of collision of the oil smoke in the air channel can be reduced, and the noise of the range hood is reduced.

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

Based on the embodiment, the second included angle is larger than or equal to 105 degrees and smaller than or equal to 120 degrees, so that the included angle between the drainage side surface and the rectification side surface is matched with the two flow guide sub-surfaces of the flow guide piece, and therefore the oil smoke can move in the air duct conveniently, the probability of vortex generation of the oil smoke is reduced, the pneumatic noise of the oil smoke is reduced, and the noise of the range hood is reduced. If the second included angle is smaller than 105 degrees, the distance between the rectifying side face and the flow guiding piece is larger, the probability that the rectifying side face contacts with the oil smoke is lower, the rectifying effect of the rectifying side face on the oil smoke is poorer, the oil smoke easily generates pneumatic noise, and the noise of the range hood is larger. If the second included angle is larger than 120 degrees, the distance between the rectifying side face and the flow guiding piece is relatively short, the air duct is relatively narrow, vortex is easily generated by lampblack, and noise of the range hood is relatively large.

In some embodiments, the drainage side surface comprises a third side and a fourth side which are oppositely arranged in the front-back direction, and the distance between the two third sides and the distance between the two fourth sides on the two drainage side surfaces are gradually increased in the direction from the smoke inlet to the smoke outlet.

Based on the above embodiment, the distance between the two third sides and the distance between the two fourth sides on the two drainage sides are gradually increased, so that the drainage sides can guide the oil smoke entering through the corresponding smoke inlet into the corresponding air duct, and the oil smoke can move in the corresponding air duct conveniently, so that the oil smoke can be rectified by the upper rectifying part conveniently, and the noise of the range hood is reduced.

In some embodiments, the third side is located at a front side of the fourth side, a distance between the two third sides is a first distance, a distance between the two fourth sides is a second distance, and a 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.

Based on the above embodiment, 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, so that the drainage side face guides the oil smoke to enter the air duct, and the rectification side face is also convenient for rectifying the oil smoke, so that the probability of vortex generation of the oil smoke is reduced, the pneumatic noise of the oil smoke is reduced, and the noise of the range hood is further reduced. If the ratio of the first distance to the second distance is smaller than 0.5 or the ratio of the first distance to the second distance is larger than 0.8, the probability of generating vortex is larger when the oil smoke moves in the air duct, so that the noise of the range hood is larger.

In some embodiments, the range hood further comprises two flow guiding pieces, the two flow guiding pieces are arranged in the fume collecting hood and are positioned on two opposite sides of the fume exhaust port and are arranged at intervals with the flow rectifying pieces, two surfaces of the two flow guiding pieces opposite to each other are matched with the inner wall of the fume collecting hood to form a fume guiding cavity, and the flow rectifying pieces divide the fume guiding cavity to form at least two air channels.

Based on the embodiment, after the oil smoke enters the smoke guide cavity through the smoke inlet, the oil smoke can be guided through the guide surfaces at two sides to enter the smoke outlet, so that the oil smoke is prevented from generating vortex in the smoke guide cavity, the probability of noise generation is reduced, and the noise of the range hood is further reduced.

In some embodiments, the two flow guiding members are provided with flow guiding surfaces extending towards the direction of the smoke outlet, the two flow guiding surfaces are configured to be close to or far away from each other, the flow guiding surfaces comprise at least two flow guiding sub-surfaces which are sequentially connected, an included angle is formed between two adjacent flow guiding sub-surfaces on one flow guiding member, or the flow guiding surfaces are cambered surfaces.

Based on the above embodiment, because the included angle is formed between the two adjacent deflector surfaces, the radiation direction of noise can be changed for many times, thereby reducing the directional radiation of the noise, and further reducing the noise of the range hood, so that a user has no noise trouble when using the range hood, and has better use experience.

In some embodiments, the baffle comprises at least two baffle plates connected in sequence, each baffle plate having a baffle face; and/or smooth transition between two adjacent deflector surfaces.

Based on the above embodiment, the deflector plate can be formed by bending, so that two adjacent deflector plates are arranged at an included angle, and therefore two adjacent deflector surfaces are also arranged at an included angle, and the process steps for manufacturing the deflector can be reduced, so that the manufacturing cost of the deflector is reduced, and the overall manufacturing cost of the range hood is further reduced. And the weight of the guide piece can be reduced by forming the guide piece through the sheet metal part, so that the whole weight of the range hood is reduced, and the range hood is convenient to install. The smooth transition between two adjacent deflector surfaces can reduce the movement resistance of the oil smoke on the deflector surfaces so as to reduce the probability of generating pneumatic noise when the oil smoke moves; smooth transition between two adjacent guide sub-surfaces is also convenient for the oil smoke to move along the guide surfaces so as to guide the oil smoke to the smoke outlet, and when the oil smoke moves along the guide surfaces, the probability of vortex generation can be reduced, thereby reducing noise.

According to the range hood, after the oil smoke enters the smoke guide cavity through the smoke inlet, the oil smoke can be rectified through the upper rectifying part of the rectifying piece, so that the oil smoke enters the smoke outlet in an approximately parallel mode, the oil smoke is prevented from colliding at the smoke outlet, the probability of collision noise is reduced, and the noise of the range hood is reduced; and because the upper rectifying part can rectify the oil smoke into a mode which is approximately parallel to enter the smoke outlet, the probability of vortex generation of the oil smoke at two sides can be reduced, the probability of pneumatic noise generation can be reduced, and the noise of the range hood can be further reduced.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a range hood according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view taken along the A-A plane in FIG. 1;

FIG. 3 is a schematic view of a partial structure of a range hood according to an embodiment of the present application;

FIG. 4 is a schematic structural view of a fairing according to an embodiment of the present disclosure;

fig. 5 is a schematic structural view of a rectifying member according to another embodiment of the present application.

Reference numerals illustrate: 1. a range hood; 11. a fume collecting hood; 11A, cavity; 11B, a smoke inlet; 11C, a smoke outlet; 11D, a smoke guide cavity; 11F, an air duct; 12. a fan assembly; 13. a flow guide; 13A, a diversion surface; 131. a deflector plate; 131A, a deflector surface; 16. a rectifying member; 161. an upper rectifying unit; 161A, rectifying side surfaces; 1611A, a first side; 1611B, a second side; 1612A, a rectifier face; 161B, rectifying top surface; 162. wedge part; 163. a lower drainage part; 163A, drainage side; 1631A, a third side; 1631B, fourth; α1, a first included angle; α2, a second angle; l1, a first distance; l2, a second included angle.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

Referring to fig. 1 and 2, an embodiment of the present application provides a range hood 1, which includes a fume collecting hood 11 and a fan assembly 12.

The fume collecting hood 11 has a cavity 11A, and a fume inlet 11B and a fume outlet 11C which communicate with the cavity 11A, and the cavity 11A of the fume collecting hood 11 can collect fume entering from the fume inlet 11B and guide the fume to the fume outlet 11C. Fume collecting hood 11 may be, but is not limited to, a metal or plastic material. Illustratively, the fume collecting hood 11 may be made of metal material to improve the structural strength of the fume collecting hood 11, so that the service life of the range hood 1 may be prolonged. For example, the fume collecting hood 11 may have two fume inlet ports 11B, and the two fume inlet ports 11B are both communicated with the cavity 11A, and one fume inlet port 11B corresponds to one cooker, so that fume generated by each cooker can enter the cavity 11A from the corresponding fume inlet port 11B, thereby improving the fume sucking efficiency.

The fan assembly 12 is connected with the fume collecting hood 11 and is communicated with the fume exhaust port 11C, and when the fan assembly 12 works, air in the cavity 11A can be pumped out through the fume exhaust port 11C, so that negative pressure can be formed in the cavity 11A, and the fume collecting hood 11 can absorb fume generated by a cooker through the fume inlet 11B.

Referring to fig. 1 and 2, the range hood 1 further includes two guiding members 13, the two guiding members 13 are disposed in the cavity 11A and located at opposite sides of the smoke outlet 11C, the guiding members 13 include guiding surfaces 13A extending toward the smoke outlet 11C, the guiding surfaces 13A are used for guiding the movement direction of the smoke entering the smoke guiding cavity 11D from the smoke inlet 11B, the guiding surfaces 13A on the two guiding members 13 face each other and are matched with the inner wall of the smoke collecting cover 11 to form the smoke guiding cavity 11D, and the smoke guiding cavity 11D is conducted in the direction from the smoke inlet 11B to the smoke outlet 11C. Illustratively, the flow guiding member 13 may be, but not limited to, a sheet metal member or a solid cylinder, and in the embodiment of the present application, the specific form of the flow guiding member 13 is not limited. Illustratively, the material of the flow guiding element 13 may be, but not limited to, plastic or metal, and in the embodiment of the present application, the material of the flow guiding element 13 is not limited. Illustratively, the material of the flow guiding element 13 may be metal, so that the flow guiding element 13 has high structural strength, and the connection between the flow guiding element 13 and the fume collecting hood 11 is stable.

Referring to fig. 1 and 2, in a specific embodiment, the two guiding surfaces 13A may be configured to be far away from each other, so as to guide the oil smoke to move along the guiding surfaces 13A, so as to prevent the oil smoke from generating vortex in the smoke guiding cavity 11D, so as to reduce the probability of noise generation, and further reduce the noise of the range hood 1.

Referring to fig. 2 and 3, specifically, the guide surface 13A may include at least two guide sub-surfaces 131A connected in sequence, and an included angle is formed between two adjacent guide sub-surfaces 131A on one guide member 13, in the illustration, it can be seen that the two guide sub-surfaces 131A are arranged at an obtuse angle greater than 90 degrees, so that the guide surfaces 13A on the two guide members 13 are in opposite direction concave forms, and at this time, the two guide surfaces 13A are in a state of being far away from each other. In this embodiment, the two adjacent deflector surfaces 131A are arranged in an included angle, so that the multi-directional radiation can be performed on the pneumatic noise generated during the movement of the oil smoke on the basis of guiding the movement of the oil smoke, so as to weaken the directional radiation of the pneumatic noise, and further reduce the noise of the range hood 1. Illustratively, the baffle 13A may include two baffle surfaces 131A connected in sequence, and of course, the baffle 13A may include three baffle surfaces 131A connected in sequence. It can be understood that the guiding surface 13A on the guiding element 13 may be an arc surface, so that the guiding of the oil smoke is smoother, so as to reduce the probability of generating pneumatic noise and further reduce the noise of the range hood 1.

It will be appreciated that the guide surfaces 13A on the two guide members 13 may be configured to be close to each other, that is, on the basis of fig. 2 and 3, the two guide sub-surfaces 131A may be disposed at an obtuse angle greater than 90 degrees, and the sharp angles formed by the two guide sub-surfaces 131A are mutually oriented, so as to form a state of being close to each other, so that the smoke guided by the guide surfaces 13A may enter the smoke outlet 11C in nearly parallel flow paths at two sides of the smoke outlet 11C, thereby preventing the smoke at two sides from colliding with each other at the smoke outlet 11C, and further reducing the probability of collision noise to reduce the noise of the smoke ventilator 1.

Referring to fig. 2 and fig. 3, in a specific embodiment, the guide member 13 may be a sheet metal part, the guide member 13 includes at least two sequentially connected guide sub-plates 131, each guide sub-plate 131 has a guide sub-surface 131A, and the guide sub-plates 131 may be formed by bending, so that two adjacent guide sub-plates 131 form an included angle, so that two adjacent guide sub-surfaces 131A also form an included angle, and the process steps for manufacturing the guide member 13 may be reduced, so as to reduce the manufacturing cost of the guide member 13, and further reduce the overall manufacturing cost of the range hood 1. And the weight of the guide piece 13 can be reduced by forming the guide piece 13 through the sheet metal part, so that the whole weight of the range hood 1 is reduced, and the range hood 1 is convenient to install.

Referring to fig. 2 and fig. 3, in a specific embodiment, two adjacent deflector surfaces 131A are in smooth transition, so that movement resistance of the oil smoke on the deflector surface 13A can be reduced, probability of generating pneumatic noise when the oil smoke moves is reduced, and noise of the range hood 1 is reduced; and smooth transition between two adjacent guide sub-surfaces 131A is also convenient for the oil smoke to move along the guide surface 13A so as to guide the oil smoke to the smoke outlet 11C, and when the oil smoke moves along the guide surface 13A, the probability of vortex generation can be reduced, so that the noise of the range hood 1 is reduced.

Referring to fig. 2-4, in a specific embodiment, the range hood 1 further includes a rectifying member 16, where the rectifying member 16 is disposed in the smoke guiding cavity 11D, the rectifying member 16 includes an upper rectifying portion 161, opposite sides of the upper rectifying portion 161 in a front-rear direction of the smoke collecting hood 11 are respectively in contact with a cavity wall of the smoke guiding cavity 11D, opposite sides of the upper rectifying portion 161 in a left-right direction of the smoke collecting hood 11 are formed with rectifying side surfaces 161A, the rectifying side surfaces 161A extend in a direction from the smoke inlet 11B to the smoke outlet 11C, and are disposed at intervals from the cavity wall of the smoke guiding cavity 11D in the left-right direction, and the rectifying side surfaces 161A are used to rectify the smoke entering the smoke guiding cavity 11D from the smoke inlet 11B so that the smoke can enter the smoke outlet 11C in an approximately parallel manner, thereby preventing the smoke from colliding at the smoke outlet 11C and reducing the probability of generating collision noise, thereby reducing the noise of the range hood 1. Illustratively, the rectifying element 16 may be, but not limited to, plastic or metal, and the rectifying element 16 may be connected to the wall of the smoke guiding cavity 11D by, but not limited to, screwing, clamping, gluing or riveting. For example, the rectifying member 16 may be made of metal, so that the rectifying member 16 has high structural strength, so as to reduce the probability of deformation of the rectifying member 16, thereby ensuring that the rectifying member 16 can rectify the oil smoke.

In the embodiment of the present application, after the oil smoke enters the smoke guiding cavity 11D through the smoke inlet 11B, the oil smoke may be rectified through the upper rectifying portion 161 of the rectifying member 16, so that the oil smoke enters the smoke outlet 11C in an approximately parallel manner, and the oil smoke is prevented from colliding at the smoke outlet 11C, so that the probability of generating collision noise is reduced, and the noise of the range hood 1 is reduced; and, since the upper rectifying portion 161 can rectify the oil smoke into the approximately parallel mode to enter the smoke outlet 11C, the probability of generating vortex of the oil smoke at two sides can be reduced, the probability of generating aerodynamic noise can be reduced, and the noise of the range hood 1 can be further reduced.

Referring to fig. 3 and 4, further, since the flow rate of the oil smoke at the rear position near the smoke guiding cavity 11D is larger and more concentrated than the flow rate at the front position near the smoke guiding cavity 11D, the distance between the two rectifying side surfaces 161A is set to be smaller from rear to front, so that the oil smoke with larger flow rate near the rear has better rectifying effect, so as to reduce the noise of the range hood 1.

It will be appreciated that the range hood 1 may include a rectifying member 16 to divide the smoke guiding chamber 11D into two air passages 11F, so that the negative pressure in each air passage 11F may be increased, thereby improving the smoking effect of the range hood 1. It will be further appreciated that the range hood 1 may further comprise two rectifying members 16, the two rectifying members 16 being spaced apart to divide the smoke guiding chamber 11D into three air passages 11F. Of course, the range hood 1 may further include three rectifying members 16, and the rectifying members 16 between two adjacent rectifying members 16 are spaced apart to divide the smoke guiding cavity 11D into four air channels 11F. In the embodiment of the present application, the number of the rectifying members 16 is not particularly limited, and may be selected according to design requirements.

Referring to fig. 3 and 4, in a specific embodiment, the rectifying side 161A includes a first edge 1611A and a second edge 1611B disposed opposite to each other in a front-rear direction, and in a direction from the smoke inlet 11B to the smoke outlet 11C, a distance between the two first edges 1611A and a distance between the two second edges 1611B on the rectifying side 161A are gradually reduced, so that a width of the rectifying member 16 in a left-right direction is gradually reduced in a direction close to the smoke outlet 11C so as to guide the smoke into the smoke outlet 11C, and the smoke can be made to enter the smoke outlet 11C in an approximately parallel manner, so as to prevent the smoke from colliding at the smoke outlet 11C, so as to reduce a probability of generating collision noise, thereby reducing noise of the range hood 1.

Referring to fig. 3 and 4, in a specific embodiment, the rectifying side 161A includes at least two rectifying surfaces 1612A sequentially arranged from the smoke inlet 11B to the smoke outlet 11C, and two adjacent rectifying surfaces 1612A are smooth and excessive, and the two adjacent rectifying surfaces 1612A are disposed at an included angle and form a concave structure toward the inside of the rectifying member 16. The movement direction of the oil smoke can be changed for many times by utilizing at least two rectifying surfaces 1612A which are arranged at an included angle, so that the oil smoke at two sides can be ensured to enter the smoke outlet 11C in an approximately parallel mode after being separated from the rectifying part 16, the probability of collision of the oil smoke at two sides can be further reduced, the probability of collision noise generated by the oil smoke is reduced, and the noise of the range hood 1 is reduced. Illustratively, the rectifying side 161A may include two rectifying sides 1612A, with the rectifying sides 1612A being smoothly blended and angled. Illustratively, the rectifying side 161A may further include three rectifying facets 1612A, and two adjacent rectifying facets 1612A are smoothly connected and disposed at an included angle.

Referring to fig. 3 to 5, specifically, the included angle between two adjacent rectifying surfaces 1612A is a first included angle α1, when the first included angle α1 is greater than or equal to 130 ° and less than or equal to 170 °, the oil smoke can move along the rectifying side surface 161A so as to be guided to the smoke outlet 11C, and when the oil smoke moves along the rectifying side surface 161A, the probability of generating vortex at the included angle between the two adjacent rectifying surfaces 1612A can be reduced, so as to reduce the pneumatic noise of the oil smoke, and thus reduce the noise of the range hood 1. If the first included angle α1 is smaller than 130 °, because the included angle between the two adjacent surfaces 1612A is smaller, when the oil smoke flows through the two adjacent surfaces 1612A, the vortex is easily generated at the included angle, and the pneumatic noise is easily generated, so that the noise of the range hood 1 is larger. If the first included angle α1 is greater than 170 °, the included angle between the two adjacent rectifying surfaces 1612A is greater, which results in weaker effect of the two adjacent rectifying surfaces 1612A on twice rectification of the oil smoke, so that the probability of collision of the oil smoke when the oil smoke is separated from the rectifying part 16 is greater, collision noise is easily generated, and the noise of the range hood 1 is greater.

It will be appreciated that the rectifying side 161A may be formed as an arc surface recessed toward the inside of the rectifying member 16, and the movement direction of the oil smoke may be changed by using the arc surface, so that the oil smoke on both sides may be ensured to enter the smoke outlet 11C in an approximately parallel manner after being separated from the rectifying member 16, and then the collision noise of the oil smoke may be reduced, so as to reduce the noise of the range hood 1. And after the rectifying side surface 161A is set to be the cambered surface, the rectifying side surface 161A is smoother, so that the probability of generating vortex on the rectifying side surface 161A can be reduced, the pneumatic noise of lampblack can be reduced, and the noise of the range hood 1 can be reduced.

Referring to fig. 3 to 5, in a specific embodiment, the rectifying member 16 further includes a plurality of wedges 162, the wedges 162 are disposed on the rectifying side 161A and extend toward the direction of the smoke outlet 11C, two adjacent wedges 162 are disposed at intervals in the front-rear direction, and the two wedges 162 are utilized to rectify the smoke flowing through the rectifying side 161A, so that when two smoke and the smoke are simultaneously contacted with the rectifying side 161A, collision between the two smoke and the smoke can be prevented, thereby reducing probability of collision noise generated between the two smoke and the smoke and further reducing noise of the smoke ventilator 1. Further, the wedge 162 is used for preventing collision between two lampblack beams, so that the probability of vortex generation between the two lampblack beams can be reduced, the pneumatic noise of the lampblack is further reduced, and the noise of the range hood 1 is further reduced. Illustratively, the wedge 162 may be formed separately and then attached to the fairing 16 by, but not limited to, bolting, clamping, gluing or riveting. For example, the wedge 162 may also be integrally formed with the fairing 16. In the present embodiment, the specific form of connection of the wedge 162 with the fairing 16 is not limited.

Referring to fig. 3-5, further, after the oil smoke enters the smoke guiding cavity 11D, due to the convergence of the fluid, the flow rate of the oil smoke near the rear position is larger and more concentrated than the flow rate near the front position, so that the length of the wedge 162 is gradually increased toward the rear direction, and the longer wedge 162 near the rear can rectify the oil smoke with larger flow rate and more concentrated, so that the probability of collision of the oil smoke at the rear is lower, and the probability of vortex generation of the oil smoke at the rear is lower, thereby reducing the noise of the range hood 1.

Referring to fig. 3 and fig. 4, in a specific embodiment, the rectifying member 16 further includes a rectifying top surface 161B disposed towards the smoke outlet 11C, the rectifying top surface 161B is connected between the two rectifying side surfaces 161A, and the rectifying top surface 161B is utilized to enable the two rectifying side surfaces 161A to be disposed at intervals, so that after the two lampblack is separated from the rectifying member 16, a buffer space is further provided between the two lampblack, so that the two lampblack can be in smooth contact, and enter the smoke outlet 11C in an approximately parallel manner, so as to reduce the probability of collision noise generated by the two lampblack, reduce the probability of collision noise generated by the lampblack, and further reduce the noise of the range hood 1.

Referring to fig. 3 and 4, further, the connection between the rectifying top surface 161B and the rectifying side surfaces 161A on both sides is formed with an arc structure, so that when the oil smoke on both sides is separated from the rectifying member 16, the vortex of the oil smoke is prevented, so as to reduce the pneumatic noise of the oil smoke, and further reduce the noise of the range hood 1.

Referring to fig. 3 and 4, in a specific embodiment, the rectifying member 16 further includes a lower drainage portion 163, the lower drainage portion 163 is connected to a side of the upper rectifying portion 161 facing the smoke inlet 11B, drainage side surfaces 163A are formed on opposite sides of the lower drainage portion 163 in the left-right direction of the smoke collecting hood 11, the drainage side surfaces 163A and the rectification side surfaces 161A are disposed at an included angle, and the smoke entering through the corresponding smoke inlet 11B is guided into the corresponding air duct 11F by using the drainage side surfaces 163A, so that the smoke moves in the corresponding air duct 11F, so that the smoke is rectified by using the upper rectifying portion 161, the smoke is rectified by using the flow guiding member 13, and therefore, the probability of vortex generation of the smoke in the air duct 11F can be reduced, the probability of collision of the smoke in the air duct 11F can be reduced, and the noise of the smoke ventilator 1 can be reduced.

Referring to fig. 3-5, in a specific embodiment, the drainage side 163A and the rectifying side 161A have a second included angle α2, where the second included angle α2 is greater than or equal to 105 ° and less than or equal to 120 °, so that the included angle between the drainage side 163A and the rectifying side 161A is matched with the two diversion sub-surfaces 131A of the diversion member 13, so that the oil smoke is convenient to move in the air duct 11F, so as to reduce the probability of vortex generated by the oil smoke, reduce the pneumatic noise of the oil smoke, and reduce the noise of the range hood 1. If the second included angle α2 is smaller than 105 °, the distance between the rectifying side 161A and the guiding element 13 is larger, so that the probability that the rectifying side 161A contacts the oil smoke is lower, the rectifying effect of the rectifying side 161A on the oil smoke is poorer, the oil smoke is easy to generate pneumatic noise, and the noise of the range hood 1 is larger. If the second included angle α2 is greater than 120 °, the distance between the rectifying side 161A and the flow guiding member 13 is relatively short, the air duct 11F is relatively narrow, and the vortex of the oil smoke is easily generated, so that the noise of the range hood 1 is relatively high.

Referring to fig. 3 to 5, in a specific embodiment, the drainage side 163A includes a third side 1631A and a fourth side 1631B opposite to each other in the front-rear direction, and 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 drainage sides 163A are gradually increased, so that the drainage side 163A can guide the smoke entering through the corresponding smoke inlet 11B into the corresponding air duct 11F, so that the smoke moves in the corresponding air duct 11F, so that the smoke is rectified by the upper rectifying portion 161, and the noise of the smoke ventilator 1 is reduced.

Referring to fig. 3-5, in a specific embodiment, the third side 1631A is located at a front side of the fourth side 1631B, where the distance between the two third sides 1631A is a first distance L1, the distance between the two fourth sides 1631B is a second distance L2, and 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, so that the drainage side 163A guides the oil smoke into the air duct 11F, and the rectifying side 161A rectifies the oil smoke, so as to reduce the probability of vortex generation of the oil smoke, reduce the pneumatic noise of the oil smoke, and further reduce the noise of the range hood 1. If the ratio of the first distance L1 to the second distance L2 is smaller than 0.5, or the ratio of the first distance L1 to the second distance L2 is larger than 0.8, the probability of generating vortex is larger when the oil smoke moves in the air duct 11F, and the noise of the range hood 1 is larger.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, this is for convenience of description and simplification of the description, but does not indicate or imply that the apparatus or element to be referred must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely used for illustration and are not to be construed as limitations of the present patent, and that the specific meaning of the terms described above may be understood by those of ordinary skill in the art according to the specific circumstances.

The foregoing description of the preferred embodiment of the present utility model is not intended to limit the utility model to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims (14)

1. A range hood, comprising:

the fume collecting hood is provided with a fume guiding cavity, a fume inlet and a fume outlet which are communicated with the fume guiding cavity, and

the rectification piece is arranged in the smoke guide cavity, the rectification piece comprises an upper rectification part, the opposite sides of the upper rectification part in the front-back direction of the smoke collecting cover are respectively contacted with the cavity wall of the smoke guide cavity, rectification side faces are formed on the opposite sides of the upper rectification part in the left-right direction of the smoke collecting cover, the rectification side faces extend in the direction from the smoke inlet to the smoke outlet, the rectification side faces are arranged at intervals with the cavity wall of the smoke guide cavity in the left-right direction, and the distance between the rectification side faces is reduced from the rear to the front.

2. The range hood of claim 1, wherein the rectifying side includes first and second sides disposed opposite each other in the front-rear direction, and a distance between the first sides and a distance between the second sides on both of the rectifying sides are gradually reduced in a direction from the smoke inlet to the smoke outlet.

3. The range hood according to claim 2, wherein the rectifying side surface comprises at least two rectifying surfaces which are sequentially arranged in a direction from the smoke inlet to the smoke outlet, two adjacent rectifying surfaces are smooth and excessive, and the two adjacent rectifying surfaces are arranged at an included angle and form a structure recessed toward the inside of the rectifying part.

4. A range hood according to claim 3, wherein the angle between two adjacent said surfaces is a first angle, said first angle being 130 ° or more and 170 ° or less.

5. The range hood of claim 2, wherein the rectifying side is formed as a cambered surface recessed toward the inside of the rectifying member.

6. The range hood of claim 2, wherein the rectifying member further comprises:

the plurality of wedges are arranged on the rectifying side face and extend towards the direction of the smoke outlet, two adjacent wedges are arranged at intervals in the front-rear direction, and the length of each wedge gradually increases in the direction close to the rear.

7. The range hood of claim 2 wherein the rectifying member further comprises a rectifying top surface disposed toward the exhaust port, the rectifying top surface being connected between the rectifying side surfaces, and a junction of the rectifying top surface and the rectifying side surfaces forming an arc structure.

8. The range hood according to claim 1, wherein the rectifying member further comprises a lower drainage portion connected to a side of the upper rectifying portion facing the smoke inlet, and drainage side surfaces are formed on opposite sides of the lower drainage portion in the left-right direction of the smoke collecting hood, and the drainage side surfaces and the rectification side surfaces are disposed at an included angle.

9. The range hood of claim 8 wherein the drainage side has a second angle with the rectifying side that is greater than or equal to 105 ° and less than or equal to 120 °.

10. The range hood of claim 8, wherein the drainage side includes a third side and a fourth side disposed opposite each other in the front-rear direction, and a distance between the third sides and a distance between the fourth sides on both the drainage sides are gradually increased in the direction from the inlet to the outlet.

11. The range hood of claim 10 wherein the third side is forward of the fourth side, the distance between the two third sides is a first distance, the distance between the two fourth sides is a second distance, and 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.

12. The range hood of any one of claims 1-11, further comprising:

the two flow guiding pieces are arranged in the fume collecting hood and positioned on two opposite sides of the fume exhaust port, are arranged at intervals with the flow rectifying pieces, two opposite surfaces of the flow guiding pieces are matched with the inner wall of the fume collecting hood to form the fume guiding cavity, and the flow rectifying pieces separate the fume guiding cavity to form at least two air channels.

13. The range hood of claim 12, wherein two of the flow guiding members have flow guiding surfaces extending toward the direction of the exhaust port, the two flow guiding surfaces are configured to be close to or far from each other, the flow guiding surfaces include at least two flow guiding sub-surfaces connected in sequence, an included angle is formed between two adjacent flow guiding sub-surfaces on one flow guiding member, or the flow guiding surfaces are cambered surfaces.

14. The range hood of claim 13 wherein the deflector comprises at least two sequentially connected deflector plates, each deflector plate having the deflector face; and/or the number of the groups of groups,

and smoothly transiting between two adjacent deflector surfaces.