CN-118816255-B - Fume exhaust fan

CN118816255BCN 118816255 BCN118816255 BCN 118816255BCN-118816255-B

Abstract

The embodiment of the application discloses a range hood, which comprises a smoke collecting hood, an oil collecting box and a rectifying piece, wherein the smoke collecting hood is provided with a smoke guide cavity, a smoke inlet and a smoke outlet, the smoke inlet and the smoke outlet are communicated with the smoke guide cavity, the oil collecting box is connected with the smoke collecting hood and is arranged at the smoke inlet, the rectifying piece is arranged in the smoke guide cavity and comprises an upper rectifying part, the opposite sides of the upper rectifying part in the front-back direction of the smoke collecting hood are respectively contacted with the cavity wall of the smoke guide cavity, rectifying sides are formed on the opposite sides of the rectifying piece in the left-right direction of the smoke collecting hood, and the rectifying sides extend in the direction from the smoke inlet to the smoke outlet, so that the smoke can enter the smoke outlet in an approximately parallel mode, the collision of the smoke at the smoke outlet is prevented, the probability of collision noise is reduced, the probability of vortex flow generated by the smoke at the two sides is reduced, and the noise of the range hood is reduced. 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.

Inventors

JIA ZHIQIANG
Rao Yusha
HU YONG
ZHOU ZHIJIAN
HE XIAOYI
JIANG JIWU
HAO MENG

Assignees

芜湖美的智能厨电制造有限公司

Dates

Publication Date: 20260505
Application Date: 20230420

Claims (11)

1. A range hood, comprising: The smoke collecting hood is provided with a smoke guide cavity, a smoke inlet and a smoke outlet which are communicated with the smoke guide cavity; an oil collecting box connected with the fume collecting hood and arranged at the fume inlet, 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-rear 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 rectification piece 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 two rectification side faces is reduced from the rear side to the front side; The rectification side surfaces comprise first edges and second edges which are oppositely arranged in the front-back direction, and the distance between the two first edges and the distance between the two second edges on the two rectification side surfaces are gradually reduced in the direction from the smoke inlet to the smoke outlet; The rectifying piece further comprises a lower drainage part, the lower drainage part is connected to one side, facing the smoke inlet, of the upper rectifying part, 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; The drainage side 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 are gradually increased in the direction from the smoke inlet to the smoke outlet.
2. The range hood of claim 1, wherein the rectifying side surface comprises at least two rectifying surfaces sequentially arranged in a direction from the smoke inlet to the smoke outlet, two adjacent rectifying surfaces are in smooth transition, and the two adjacent rectifying surfaces are arranged at an included angle and form a structure recessed toward the inside of the rectifying part.
3. The range hood of claim 2, wherein the angle between two adjacent said surfaces is a first angle, said first angle being 130 ° or greater and 170 ° or less.
4. The range hood of claim 1, wherein the rectifying side is formed as a cambered surface recessed toward the inside of the rectifying member.
5. The range hood of claim 1, wherein the fairing 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.
6. The range hood of claim 1 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.
7. The range hood of claim 1 wherein the drainage side has a second angle with the rectifying side, the second angle being 105 ° or more and 120 ° or less.
8. The range hood of claim 1 wherein the third side is forward 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.
9. The range hood of any one of claims 1-8, 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.
10. The range hood of claim 9, 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.
11. The range hood according to claim 10, wherein the deflector comprises at least two deflector plates connected in sequence, each of the deflector plates having the deflector surface, and/or, And smoothly transiting between two adjacent deflector surfaces.

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, which aims to reduce noise when the range hood operates. The embodiment of the application provides a range hood, which comprises a smoke collecting hood, an oil collecting box and a rectifying piece, wherein the smoke collecting hood is provided with a smoke guide cavity, a smoke inlet and a smoke outlet, the smoke inlet and the smoke outlet are communicated with the smoke guide cavity, the oil collecting box is connected with the smoke collecting hood and is arranged at the smoke inlet, the rectifying piece is arranged in the smoke guide cavity and comprises an upper rectifying part, the two opposite sides of the upper rectifying part in the front-back direction of the smoke collecting hood are respectively contacted with the cavity wall of the smoke guide cavity, rectifying sides are formed on the two opposite sides of the rectifying piece in the left-right direction of the smoke collecting hood, the rectifying sides extend in the direction from the smoke inlet to the smoke outlet, the rectifying sides are arranged at intervals from the cavity wall of the smoke guide cavity in the left-right direction, and the distance between the two rectifying sides is reduced from the back to the front. According to 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 being collided at the smoke outlet, the probability of collision noise is reduced, and the noise of the range hood is reduced. Further, compared with the flow close to the front position, the flow close to the rear position of the oil smoke is larger and more concentrated, so that the distance between the two rectifying side surfaces is set to be smaller from the rear to the front, and the oil smoke with larger flow close to the rear has better rectifying effect, so that 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, two adjacent rectifying surfaces are in smooth transition, and the two adjacent rectifying surfaces 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