Range hood

Abstract

The range hood comprises a shell, a draught fan and a flow guide assembly, a smoke exhaust cavity is formed in the shell, and the shell is further provided with a smoke suction opening communicating with the smoke exhaust cavity. The draught fan is arranged in the smoke exhaust cavity and connected with the shell, and the draught fan comprises a first air inlet and a second air inlet which are arranged oppositely in the front-back direction of the shell. The flow guide assembly is arranged in the smoke exhaust cavity, connected with the shell and located below the draught fan and above the smoke suction opening, and the flow guide assembly is used for dividing smoke entering the smoke exhaust cavity from the smoke suction opening into two strands of sub-airflow and guiding the two strands of sub-airflow to the first air inlet and the second air inlet correspondingly so that the two strands of sub-airflow can enter the draught fan. According to the technical scheme, the flow resistance of smoke can be reduced, the exhaust efficiency of the range hood is improved, and meanwhile, the working noise of the range hood is reduced.

Description

Technical Field

[0001] This application relates to the technical field of kitchen appliances, and particularly to a range hood. Background Art

[0002] With the improvement of people's material living standards, the demand for protection from cooking fumes during the cooking process is increasing day by day, and range hoods have gradually become an essential household appliance for purifying the kitchen environment. A range hood is used to inhale the mixture of cooking fumes and water vapor generated during the cooking process into the fan, and discharge the mixture of cooking fumes and water vapor through the air pressure generated by the fan.

[0003] In the related technical field, the flue gas entering the interior of the range hood from the smoke inlet is in a disordered state without effective rectification. As a result, some of the flue gas will flow through the bottom of the fan and then enter the interior of the fan along the bottom of the fan, resulting in a relatively large flow resistance of the flue gas inside the range hood, and thus the generated cooking fumes cannot be efficiently discharged in time, affecting the exhaust efficiency of the range hood. Summary of the Invention

[0004] The embodiments of this application provide a range hood that can reduce the flow resistance of the flue gas, improve the exhaust efficiency of the range hood, and at the same time reduce the operating noise of the range hood.

[0005] The embodiments of this application provide a range hood, which includes:

[0006] A housing, a smoke exhaust chamber is provided inside the housing, and the housing is also provided with a smoke inlet communicating with the smoke exhaust chamber;

[0007] A fan, which is arranged in the smoke exhaust chamber and connected to the housing. In the front-back direction of the housing, the fan includes a first air inlet and a second air inlet arranged in opposite directions; and

[0008] A flow guiding assembly, which is arranged in the smoke exhaust chamber and connected to the housing, and is located below the fan and above the smoke inlet. The flow guiding assembly is used to divide the flue gas entering the smoke exhaust chamber from the smoke inlet into two sub-airflows, and respectively guide the two sub-airflows to the first air inlet and the second air inlet to enter the fan.

[0009] In some of the embodiments, in the front-back direction of the housing, the housing includes a front plate and a rear plate arranged opposite to each other. The first air inlet is arranged facing the front plate, and the second air inlet is arranged facing the rear plate;

[0010] The flow guiding assembly includes a rectifying member, the rectifying member having a first guiding surface and a second guiding surface. The first guiding surface is disposed opposite to the front plate, and the second guiding surface is disposed opposite to the rear plate. In the direction of the smoking port approaching the blower, the distance between the first guiding surface and the second guiding surface gradually decreases.

[0011] In some embodiments, the rectifying member is located directly below the blower, and the second guiding surface extends obliquely along the direction close to the front plate from the bottom of the blower.

[0012] In some embodiments, the front plate includes a first plate body, a second plate body, and a third plate body connected in sequence. The first plate body is disposed opposite to the blower, the third plate body is provided with the smoking port, the second plate body is inclined towards the rear plate, and the intersection position of the first guiding surface and the second guiding surface is spaced from the second plate body.

[0013] In some embodiments, the distance between the intersection position of the first guiding surface and the second guiding surface and the second plate body is L, satisfying: L is greater than or equal to 30 millimeters;

[0014] and / or, the range of the included angle between the vertical axis of the surface of the second plate body facing the rear plate and the central axis of the rectifying member is between 0° and 20°.

[0015] In some embodiments, in the height direction of the housing, the smoke exhaust cavity includes a smoke collecting sub-cavity, a transition sub-cavity, and a blower sub-cavity arranged in sequence from bottom to top. The blower is located in the blower sub-cavity, the smoking port communicates with the cavity wall of the smoke collecting sub-cavity, and the distance between the opposite two cavity walls of the transition sub-cavity in the front-rear direction gradually increases from bottom to top;

[0016] The intersection position of the first guiding surface and the second guiding surface is located at the connection position of the smoke collecting sub-cavity and the transition sub-cavity or below the connection position of the smoke collecting sub-cavity and the transition sub-cavity.

[0017] In some embodiments, in the front-rear direction, the rectifying member further includes a third guiding surface and a fourth guiding surface. The third guiding surface is connected to the side of the first guiding surface close to the blower, and the fourth guiding surface is connected to the side of the second guiding surface close to the blower;

[0018] In the height direction of the housing, the third guiding surface extends obliquely upwards towards the rear plate, and the fourth guiding surface extends obliquely towards the surface of the blower close to the rear plate.

[0019] In some of the embodiments, the third guide surface intersects with the fourth guide surface to form a first angle, and the first angle is greater than or equal to 60° and less than or equal to 100°.

[0020] In some embodiments, a vertical distance between a side of the fairing component close to the front plate and a side of the fairing component close to the rear plate is D, and D is less than or equal to 30 mm.

[0021] And / or, the first guide surface and the second guide surface intersect to form a second angle, and the second angle is greater than or equal to 5° and less than or equal to 20°.

[0022] And / or, the distance between the surface of the fan at the first air inlet and the front plate is smaller than the distance between the surface of the fan at the second air inlet and the rear plate.

[0023] In some embodiments, the rectification component includes a back plate and a sound absorbing layer, the back plate is provided with an installation cavity and an installation opening communicating with the installation cavity, the sound absorbing layer passes through the installation opening and is fixed in the installation cavity.

[0024] In some embodiments, a plurality of sound-absorbing through holes connected to the installation cavity are provided on a side of the back plate away from the installation opening, and the plurality of sound-absorbing through holes are arranged in an array.

[0025] In some embodiments, the suction force of the second air inlet is greater than the suction force of the first air inlet, and the mounting port is arranged toward the rear plate;

[0026] The exposed area of ​​the sound absorbing layer at the installation opening is larger than the exposed area of ​​the sound absorbing layer at the plurality of sound absorbing through holes.

[0027] In some embodiments, the backplane comprises:

[0028] A bottom panel, the bottom panel having a first direction and a second direction arranged at an angle;

[0029] Two side panels, the two side panels are respectively connected to two opposite sides of the bottom panel in the first direction; and

[0030] Two flanges, the two flanges are respectively bent and connected to two opposite sides of the bottom panel in the second direction, and are located between the two side panels;

[0031] The two flanges, the bottom panel and the two side panels are combined to form the installation cavity, and the two flanges cooperate to form the installation opening. The two flanges are used to abut against the sound absorbing layer and fix it in the installation cavity.

[0032] In some of these embodiments, the flow guiding assembly includes two support members, the two support members are connected to the rear plate, and the two support members are respectively detachably connected to opposite ends of the rectifying member in the length direction.

[0033] Based on the range hood of the present application, the fan has a first air inlet and a second air inlet arranged in opposite directions in the front-back direction of the housing. At the same time, a flow guiding assembly is arranged in the smoke exhaust cavity to split the smoke entering the smoke exhaust cavity from the smoke suction port into two sub-airflows, and the two sub-airflows are respectively guided to the first air inlet and the second air inlet to enter the fan, so that the range hood of this embodiment has the following effects:

[0034] First, since the first air inlet and the second air inlet of the fan of the present application are arranged in the front-back direction of the housing, compared with the way that the air inlets are arranged in the left-right or up-down direction of the housing, it is possible to avoid the influence of the sizes of the first air inlet and the second air inlet on the installation size of the range hood in the front-back direction. In this way, a fan with larger-sized first air inlet and second air inlet can be used, and the occupied space of the range hood in the front-back direction can be avoided from increasing.

[0035] Second, by splitting and guiding the smoke through the flow guiding assembly, the smoke can quickly flow to the first air inlet and the second air inlet to enter the fan, thereby reducing the situation where the smoke is disordered in the smoke exhaust cavity and flows to the bottom of the fan. This not only reduces the noise generated by the turbulent flow of the smoke, but also reduces the flow path of the smoke to the fan, reduces the flow resistance to the smoke, and improves the efficiency and effect of the fan when extracting the smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0037] Figure 1 It is a schematic structural diagram of an embodiment of the range hood of the present application;

[0038] Figure 2 It is a sectional structural diagram of the range hood of the present application;

[0039] Figure 3 It is a sectional structural diagram of another perspective of the range hood of the present application;

[0040] Figure 4 For Figure 2 and Figure 3Partial enlarged view of the rectifying member of the range hood;

[0041] Figure 5 Structural schematic diagram of another embodiment of the range hood of the present application;

[0042] Figure 6 Structural schematic diagram of the diversion assembly of the range hood of the present application;

[0043] Figure 7 Structural schematic diagram of the diversion assembly of the range hood of the present application from another perspective;

[0044] Figure 8 Exploded structural schematic diagram of the diversion assembly of the range hood of the present application.

[0045] Explanation of the reference numerals in the drawings:

[0046] 100, range hood; 10, housing; 10A, smoke exhaust cavity; 10a, smoke collecting sub-cavity; 10b, transition sub-cavity; 10c, fan sub-cavity; 10B, smoke suction port; 10C, smoke exhaust port; 11, front panel; 111, first plate body; 112, second plate body; 113, third plate body; 12, rear plate; 20, fan; 21, first air inlet; 22, second air inlet; 30, diversion assembly; 31, rectifying member; 31A, first guiding surface; 31B, second guiding surface; 31C, third guiding surface; 31D, fourth guiding surface; 31a, first included angle; 32b, second included angle; 311, back plate; 311a, mounting opening; 311b, mounting cavity; 311c, sound absorption through hole; 3111, bottom panel; 3112, side panel; 3113, flanging; 312, sound absorption layer; 32, support member; 321, positioning plate.

[0047] The realization, functional features and advantages of the purpose of the present application will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0048] To make the purpose, technical solutions and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings.

[0049] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods that are consistent with some aspects of the present application as detailed in the appended claims.

[0050] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and cannot be construed as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In addition, in the description of the present application, unless otherwise specified, "a plurality of" means two or more. " / ", which describes the association relationship of associated objects, indicates that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0052] With the improvement of people's material living standards, the demand for protection from cooking fumes during the cooking process is increasing day by day, and range hoods have gradually become essential household appliances for purifying the kitchen environment. A range hood is used to inhale the mixture of cooking fumes and water vapor generated during the cooking process into the fan, and discharge the mixture of cooking fumes and water vapor through the air pressure generated by the fan.

[0053] In the related technical field, the flue gas entering the interior of the range hood from the smoke inlet is in a disordered state without effective rectification. As a result, part of the flue gas will flow through the bottom of the fan and then enter the interior of the fan along the bottom of the fan, resulting in a relatively large flow resistance of the flue gas inside the range hood. Furthermore, the generated cooking fumes cannot be efficiently discharged in a timely manner, affecting the smoke exhaust efficiency of the range hood.

[0054] To solve the above problems, please refer to Figures 1 to 3 This application proposes a range hood 100. In the embodiments of this application, the range hood 100 includes a housing 10, a fan 20, and a flow guiding assembly 30.

[0055] Among them, the housing 10 serves as the contour main body of the range hood 100 for carrying and fixing other components such as the blower 20 and the flow guiding assembly 30. The material of the housing 10 can be a metal material, such as a metal material, including but not limited to stainless steel, aluminum, etc. The embodiments of the present application do not limit this. When the material of the housing 10 is stainless steel, it has the advantages of high strength, high temperature resistance, environmental protection and hygiene, etc. And the housing 10 has three mutually perpendicular directions: up and down, left and right, and front and back. In the front and back direction of the housing 10, the housing 10 includes a front plate 11 and a rear plate 12 arranged opposite to each other. During installation, the rear plate 12 of the housing 10 is fixed to the wall to achieve the overall position fixation of the range hood 100, and the front plate 11 of the housing 10 faces the user. The shape of the housing 10 is not limited. It can be set in a regular shape such as a cuboid as a whole, or it can also be a combination of a rectangular block on the upper part and a flat plate on the lower part, so as to make the size of the side of the housing 10 close to the cooking appliance smaller in the front and back directions, which can effectively reduce the possibility of collision between the cooking utensils and the range hood 100 when the user is cooking.

[0056] A smoke exhaust cavity 10A is provided inside the housing 10, and the housing 10 is also provided with a smoke suction port 10B communicating with the smoke exhaust cavity 10A. The smoke suction port 10B can be located directly below the housing 10 to be closer to the position above the cooking appliance, so that the smoke generated by cooking on the cooking appliance can more easily enter the smoke exhaust cavity 10A from the smoke suction port 10B. In addition, it should be noted that a smoke exhaust port 10C is also provided at the top of the housing 10, and the smoke exhaust port 10C communicates with the smoke exhaust cavity 10A. Thus, the cooking exhaust gas can enter from the smoke suction port 10B of the smoke exhaust cavity 10A and flow from bottom to top, and then flow to a wide area such as the outdoor through the smoke exhaust port 10C for discharge.

[0057] The blower 20 is arranged in the smoke exhaust cavity 10A and connected to the housing 10. The blower 20 can be a centrifugal blower 20, an axial flow blower 20, a cross-flow blower 20, etc. The present application does not limit this. Considering factors such as power and noise, the present application can select the blower 20 as a centrifugal blower 20. Among them, the blower 20 is generally arranged in the front and back, that is, the axis of the blower 20 extends horizontally along the front and back direction of the housing 10. Specifically, the blower 20 can be snap-fitted or locked to the top of the housing 10, and at the same time, the blower 20 is also connected to both sides of the housing 10 in the left and right directions to improve the stability of fixing the blower 20.

[0058] The fan 20 has a first air inlet 21 and a second air inlet 22 arranged opposite to each other. The first air inlet 21 is arranged facing the front plate 11, and the second air inlet 22 is arranged facing the rear plate 12. Thus, the housing 10 correspondingly leaves an air inlet interval space between the front plate 11 and the first air inlet 21 and between the rear plate 12 and the second air inlet 22. The first air inlet 21 and the second air inlet 22 are used to generate a negative pressure suction force, so that the oil fume can be actively sucked in through the smoke suction port 10B of the housing 10, and the kitchen will not be filled with oil fume, thereby improving the user experience during cooking.

[0059] In some structural forms, the distance between the surface of the fan 20 at the first air inlet 21 and the front plate 11 is less than the distance between the surface of the fan 20 at the second air inlet 22 and the rear plate 12. That is, the whole of the fan 20 is arranged close to the front plate 11, so that most of the air flow flowing through the smoke exhaust cavity 10A flows close to the rear plate 12 of the housing 10, reducing the situation that the noise radiated by the front plate 11 of the flue gas is captured by the human ear, reducing reverberation, optimizing the noise level of the range hood 100, and improving the user experience.

[0060] The diversion component 30 is arranged in the smoke exhaust cavity 10A and connected to the housing 10, and is located below the fan 20 and above the smoke suction port 10B. Thus, under the action of the negative pressure suction force of the first air inlet 21 and the second air inlet 22 of the fan 20, the oil fume can come into contact with the diversion component 30 after being sucked in through the smoke suction port 10B, and then is directly divided into two sub-airflows through the outer contour of the diversion component 30 or is divided into two sub-airflows by the sub-air ducts formed inside the diversion component 30, and the two sub-airflows respectively flow to the first air inlet 21 and the second air inlet 22.

[0061] Based on the range hood 100 of the present application, the fan 20 has a first air inlet 21 and a second air inlet 22 arranged opposite to each other in the front-rear direction of the housing 10. At the same time, a diversion component 30 is arranged in the smoke exhaust cavity 10A to divide the flue gas entering the smoke exhaust cavity 10A from the smoke suction port 10B into two sub-airflows, and the two sub-airflows respectively enter the fan 20 through the first air inlet 21 and the second air inlet 22, so that the range hood 100 of this embodiment has the following effects:

[0062] First, since the first air inlet 21 and the second air inlet 22 of the fan 20 of the present application are arranged facing the front-rear direction of the housing 10, compared with the way that the air inlets face the left-right or up-down direction of the housing 10, the influence of the sizes of the first air inlet 21 and the second air inlet 22 on the installation size of the range hood 100 in the front-rear direction can be avoided. Thus, a fan 20 with larger-sized first air inlet 21 and second air inlet 22 can be used in cooperation, and the occupied space of the range hood 100 in the front-rear direction is not increased.

[0063] Second, the flue gas is shunted and guided through the diversion assembly 30, so that the flue gas can quickly flow to the first air inlet 21 and the second air inlet 22 to enter the fan 20, thereby reducing the situation that the flue gas is disordered in the smoke exhaust cavity 10A and flows to the bottom of the fan 20. This not only reduces the noise generated by the flue gas due to turbulence, but also shortens the flow path of the flue gas to the fan 20, reduces the flow resistance of the flue gas, and improves the efficiency and effect of the fan 20 in extracting the flue gas.

[0064] Combined Figures 2 to 4 , in some structural forms, the diversion assembly 30 includes a rectifying member 31. The rectifying member 31 has a first guiding surface 31A and a second guiding surface 31B. The first guiding surface 31A is disposed opposite to the front plate 11, and the second guiding surface 31B is disposed opposite to the rear plate 12. In the direction of the smoking port 10B approaching the fan 20, the distance between the first guiding surface 31A and the second guiding surface 31B gradually decreases. Among them, the rectifying member 31 can shunt the flue gas, and then guide the flue gas by forming the first guiding surface 31A and the second guiding surface 31B to improve the directional movement of the flue gas, thereby reducing the situation that the flue gas is disordered in the smoke exhaust cavity 10A. By adjusting the inclination angle of the first guiding surface 31A relative to the front plate 11, the inclination angle of the second guiding surface 31B relative to the rear plate 12, and the distance between the first guiding surface 31A and the second guiding surface 31B, the guiding angle of the flue gas can be adjusted.

[0065] Among them, the first guiding surface 31A and the second guiding surface 31B are disposed opposite to each other, which should be understood that the two guiding surfaces are disposed on the fluid paths where convective collisions may occur and face different or opposite fluid flow directions, that is, have different or opposite upstream directions. In addition, the first guiding surface 31A and the second guiding surface 31B can be arranged in a plane, so that the flue gas can pass through the first guiding surface 31A and the second guiding surface 31B more quickly, improving the guiding efficiency. Or the first guiding surface 31A and the second guiding surface 31B can also be arranged in an arc surface, so that the flue gas can smoothly pass through the first guiding surface 31A and the second guiding surface 31B, reducing the noise during guiding.

[0066] Further, in the height direction of the housing 10, the smoke exhaust cavity 10A includes a smoke collection sub-cavity 10a, a transition sub-cavity 10b, and a fan 20 sub-cavity 10c arranged in sequence from bottom to top. The fan 20 is located in the fan 20 sub-cavity 10c, and the smoking port 10B communicates with the cavity wall of the smoke collection sub-cavity 10a. The distance between the opposite cavity walls of the transition sub-cavity 10b in the front-back direction gradually increases from bottom to top. It can be understood that since the fan 20 sub-cavity 10c is used to accommodate the fan 20, and in order to increase the flow rate of the flue gas in the smoke collection sub-cavity 10a, the distance between the opposite cavity walls of the fan 20 sub-cavity 10c in the front-back direction of the housing 10 is much larger than the distance between the opposite cavity walls of the smoke collection sub-cavity 10a in the front-back direction of the housing 10. By forming the transition sub-cavity 10b, when the flue gas enters the fan 20 sub-cavity 10c from the smoke collection sub-cavity 10a, the sudden change amplitude of the cross-sectional area of the flue gas passing through the smoke exhaust cavity 10A is reduced, and the situation where the flow rate changes too much due to the excessive increase in the cross-sectional area, resulting in more flow vortices, is reduced. Moreover, the cavity wall of the transition sub-cavity 10b can also guide the flue gas. The intersection position of the first guiding surface 31A and the second guiding surface 31B is located at the connection position of the smoke collection sub-cavity 10a and the transition sub-cavity 10b or below the connection position of the smoke collection sub-cavity 10a and the transition sub-cavity 10b. Thus, when the flue gas just enters the transition sub-cavity 10b or before entering the transition sub-cavity 10b, it is split into two sub-airflows with smaller air volumes, that is, the flue gas is split before the cross-sectional area of the smoke exhaust cavity 10A gradually changes, so as to reduce the generation of flow vortices, thereby reducing noise and flow resistance.

[0067] Furthermore, in the front-back direction, the rectifying member 31 further includes a third guiding surface 31C and a fourth guiding surface 31D. The third guiding surface 31C is connected to the side of the first guiding surface 31A close to the fan 20, and the fourth guiding surface 31D is connected to the side of the second guiding surface 31B close to the fan 20. In the height direction of the housing 10, the third guiding surface 31C extends obliquely upward and backward toward the rear plate 12, and the fourth guiding surface 31D extends obliquely toward the surface of the fan 20 close to the rear plate 12. Thus, when the flue gas flows to the third guiding surface 31C, the flue gas is guided along the position toward the rear plate 12, that is, this part of the flue gas moves upward along the rear plate 12, so as to be away from the bottom of the fan 20, so that this part of the flue gas can be more quickly sucked into the fan 20 through the second air inlet 22. When the flue gas flows to the fourth guiding surface 31D, the flue gas is guided to the position on the surface of the fan 20 close to the rear plate 12, so that this part of the flue gas can be more quickly sucked into the fan 20 through the second air inlet 22. Thus, the flow path of the flue gas to the fan 20 is further reduced, the flow resistance to the flue gas is reduced, and the efficiency and effect of the fan 20 in extracting the flue gas are improved.

[0068] Further, the intersection of the third guiding surface 31C and the fourth guiding surface 31D forms a first included angle 31a, and the first included angle 31a is greater than or equal to 60° and less than or equal to 100°. Among them, when the first included angle 31a is less than 60°, the flowing directions of the smoke guided by the third guiding surface 31C and the fourth guiding surface 31D will be relatively close, and it is easy to affect each other and fail to achieve a good guiding effect. When the first included angle 31a is greater than 100°, at this time, the space occupied by the third guiding surface 31C and the fourth guiding surface 31D in the smoke exhaust cavity 10A is relatively large, which will affect the smoke passing area of the smoke exhaust cavity 10A. By limiting the first included angle 31a to be greater than or equal to 60° and less than or equal to 100°, specifically, it can be 60°, 70°, 80°, 90°, etc., so as to ensure the guiding effect of the third guiding surface 31C and the fourth guiding surface 31D on the smoke, and at the same time reduce the influence of the third guiding surface 31C and the fourth guiding surface 31D on the space occupied in the smoke exhaust cavity 10A.

[0069] Optionally, the vertical distance between the side of the rectifying member 31 close to the front plate 11 and the side of the rectifying member 31 close to the rear plate 12 is D, and D is less than or equal to 30 millimeters. In this embodiment, that is, the vertical distance between the connection position of the third guiding surface 31C and the first guiding surface 31A and the connection position of the fourth guiding surface 31D and the second guiding surface 31B is D, and D is less than or equal to 30 millimeters. In this way, the space occupied by the rectifying member 31 in the front-rear direction of the housing 10 is reduced, so as to reduce the influence of the rectifying member 31 on the space occupied in the smoke exhaust cavity 10A and ensure the smoke exhaust performance.

[0070] Optionally, the intersection of the first guiding surface 31A and the second guiding surface 31B forms a second included angle 32b, and the second included angle 32b is greater than or equal to 5° and less than or equal to 20°. Among them, when the second included angle 32b is less than 5°, the flowing directions of the smoke guided by the first guiding surface 31A and the second guiding surface 31B will be relatively close, and it is easy to affect each other and fail to achieve a good guiding effect. When the second included angle 32b is greater than 20°, at this time, the space occupied by the first guiding surface 31A and the second guiding surface 31B in the smoke exhaust cavity 10A is relatively large, which will affect the smoke passing area of the smoke exhaust cavity 10A. By limiting the second included angle 32b to be greater than or equal to 5° and less than or equal to 20°, specifically, it can be 5°, 10°, 15°, 20°, etc., so as to ensure the guiding effect of the first guiding surface 31A and the second guiding surface 31B on the smoke, and at the same time reduce the influence of the first guiding surface 31A and the second guiding surface 31B on the space occupied in the smoke exhaust cavity 10A.

[0071] Refer to in combination Figure 4 and Figure 5, in another embodiment, the difference compared with the above embodiment is that the rectifying member 31 is located directly below the blower 20, and the second guiding surface 31B extends obliquely in a direction close to the front plate 11 from the bottom of the blower 20. Among them, in the front-rear direction of the housing 10, the rectifying member 31 can completely cover the bottom of the blower 20, so that the rectifying member 31 can better block the flue gas towards the directly below of the blower 20, and make the part of the flue gas be guided to the second air inlet 22 under the action of the second guiding surface 31B, reducing the flow path of the flue gas to the blower 20, reducing the flow resistance of the flue gas, and improving the air intake efficiency of the second air inlet 22.

[0072] Further, the front plate 11 includes a first plate body 111, a second plate body 112 and a third plate body 113 connected in sequence. The first plate body 111 is disposed opposite to the blower 20. The third plate body 113 is provided with a smoke inlet 10B. The second plate body 112 is inclined towards the rear plate 12, and the intersection position of the first guiding surface 31A and the second guiding surface 31B is spaced from the second plate body 112. Among them, the first plate body 111, the second plate body 112 and the third plate body 113 can be an integral structure, which can save assembly parts and ensure the structural strength of the front panel at the same time. And the distance between the connection of the second plate body 112 and the first plate body 111 and the rear plate 12 is greater than the distance between the connection of the second plate body 112 and the third plate body 113 and the rear plate 12. And because the second plate body 112 is inclined towards the rear plate 12, so that after the flue gas is split at the intersection position of the first guiding surface 31A and the second guiding surface 31B and the interval between the second plate body 112, part of the flue gas can flow along the second plate body 112 to the first plate body 111, and then flow into the first air inlet 21, so as to improve the air intake efficiency of the first air inlet 21.

[0073] Furthermore, the distance between the intersection position of the first guiding surface 31A and the second guiding surface 31B and the second plate body 112 is L, satisfying: L is greater than or equal to 30 millimeters. Among them, when L is less than 30 millimeters, at this time, because the distance between the intersection position of the first guiding surface 31A and the second guiding surface 31B and the second plate body 112 is too close, the amount of flue gas flowing to the first air inlet 21 is too small, and the air intake function of the first air inlet 21 cannot be effectively utilized, thus affecting the overall exhaust efficiency of the blower 20. Therefore, by defining that the distance L between the intersection position of the first guiding surface 31A and the second guiding surface 31B and the second plate body 112 is greater than or equal to 30 millimeters, the air intake amount of the flue gas by the first air inlet 21 is ensured, so as to improve the air intake efficiency of the first air inlet 21.

[0074] Optionally, the angle between the vertical axis of the surface of the second plate body 112 facing the rear plate 12 and the central axis of the rectifying member 31 is in the range of 0° to 20°. The central axis of the rectifying member 31 can be tilted toward the front plate 11 or tilted toward the rear plate 12, and the angle between the central axis of the inclined rectifying member 31 and the vertical axis of the surface of the second plate body 112 facing the rear plate 12 is within 20 degrees, or the central axis of the rectifying member 31 is perpendicular to the surface of the second plate body 112 facing the rear plate 12, that is, the angle between the vertical axis of the surface of the second plate body 112 facing the rear plate 12 and the central axis of the rectifying member 31 is 0 degrees, so that the first guide surface 31A and the second guide surface 31B of the rectifying member 31 can play a guiding role, and at the same time, more smoke can flow to the second air inlet 22 after the smoke is diverted, thereby improving the air intake efficiency of the second air inlet 22.

[0075] Combined with reference Figures 6 to 8 In some structural forms, the rectifying component 31 includes a back plate 311 and a sound absorbing layer 312. The back plate 311 is provided with an installation cavity 311b and an installation port 311a connected to the installation cavity 311b. The sound absorbing layer 312 passes through the installation port 311a and is fixed in the installation cavity 311b. In this way, the rectifying component 31 can achieve both the flow guiding and sound absorbing effects. The sound absorbing layer 312 can effectively reduce noise and drag, thereby ultimately achieving noise optimization, reducing the noise of the entire range hood 100, and improving the user experience of the range hood 100 in the working state. Specifically, the back plate 311 is designed as a hollow cavity. On the basis of forming a hollow installation cavity 311b, a sound absorbing material is filled in the installation cavity 311b to form a sound absorbing layer 312 to effectively absorb fluid noise. It should be noted that the sound absorbing layer 312 in the present application can be a flexible sound absorbing material such as a sponge made of various materials, but is not limited thereto.

[0076] Furthermore, a plurality of sound-absorbing through holes 311c connected to the installation cavity 311b are provided on the side of the back plate 311 away from the installation opening 311a, and the plurality of sound-absorbing through holes 311c are arranged in an array. In order to more effectively absorb fluid noise, a sound-absorbing through hole 311c penetrating into the installation cavity 311b is further provided on the side of the back plate 311 away from the installation opening 311a. The sound-absorbing through holes 311c are circular holes and are regularly arranged in multiple rows and columns on the back plate 311, but the number and arrangement of the sound-absorbing through holes 311c are not limited thereto.

[0077] Furthermore, the suction force of the second air inlet 22 is greater than that of the first air inlet 21, and the installation opening 311a is arranged facing the rear plate 12. It should be noted that since a driving structure such as a motor is provided in the fan 20, the driving structure is arranged close to the first air inlet 21, and the internal structure will block a part of the first air inlet 21, so that the intake of the second air inlet 22 is relatively smooth, so that the suction effect of the second air inlet 22 is greater than that of the first air inlet 21, that is, the air intake volume of the second air inlet 22 is larger. Thus, the fluid noise on the side close to the second air inlet 22 is greater than that on the side close to the first air inlet 21, and correspondingly, the exposed area of the sound-absorbing layer 312 at the installation opening 311a is greater than the exposed area of the sound-absorbing layer 312 at the plurality of sound-absorbing through holes 311c. Thus, the sound-absorbing layer 312 can more easily absorb the fluid noise on the side of the second air inlet 22 to improve the noise reduction effect on the flue gas.

[0078] With reference to Figures 6 to 8 , optionally, the back plate 311 includes a bottom panel 3111, two side panels 3112 and two flanges 3113. The bottom panel 3111 has a first direction and a second direction arranged at an angle. The two side panels 3112 are respectively connected to opposite sides of the bottom panel 3111 in the first direction. The two flanges 3113 are respectively bent and connected to opposite sides of the bottom panel 3111 in the second direction and are located between the two side panels 3112. The two flanges 3113 and the bottom panel 3111 and the two side panels 3112 enclose an installation cavity 311b, and the two flanges 3113 cooperate to form an installation opening 311a. The two flanges 3113 are used to abut against the sound-absorbing layer 312 and fix it in the installation cavity 311b.

[0079] Among them, the bottom panel 3111, the two side panels 3112, and the two flanges 3113 can be of an integral structure, that is, the above structure can be formed by folding a single plate body, so as to improve the structural strength of the side panel 3112 and the flange 3113, and improve the abutting effect on the sound-absorbing layer 312. Of course, the bottom panel 3111, the two side panels 3112, and the two flanges 3113 can also be made into a split form for subsequent maintenance and replacement. The included angle between the first direction and the second direction can be set at 90 degrees. Specifically, the first direction is the length direction of the bottom panel, and the second direction is the width direction of the bottom panel 3111. An installation opening 311a is formed between the two flanges 3113, and the width dimension of the installation opening 311a is smaller than the width dimension of the sound-absorbing layer 312. Thus, when installing, the sound-absorbing layer 312 made of a flexible material can be compressed and enter the installation cavity 311b through the installation opening 311a. After that, after the sound-absorbing layer 312 elastically recovers, it abuts against the side of the flange 3113 facing the bottom panel 3111, and the two side panels 3112 can abut against the opposite sides of the sound-absorbing layer 312 in the length direction, so that the sound-absorbing layer 312 is clamped and fixed in the installation cavity 311b, thereby completing the fixation of the sound-absorbing layer 312. In this way, the connection method between the sound-absorbing layer 312 and the back panel 311 is convenient and fast, and it is also convenient for subsequent maintenance and replacement of the sound-absorbing layer 312. Of course, the sound-absorbing layer 312 can also be fixed in the installation cavity 311b by bonding or other means.

[0080] With reference to Figures 6 to 8 , optionally, the flow guiding assembly 30 includes two bracket members 32, and the two bracket members 32 are connected to the rear plate 12. Among them, the bracket member 32 can be made of a metal material, for example, it can be a metal material, including but not limited to stainless steel and aluminum, etc. The two bracket members 32 can be fixed to the rear plate 12 by means of snap connection or screw connection for easy disassembly and assembly. The two bracket members 32 are respectively detachably connected to the opposite ends of the rectifying member 31 in the length direction. In this way, when the rectifying member 31 is repaired and replaced later, the rectifying member 31 can be disassembled separately without removing the bracket member 32. Specifically, the rectifying member 31 and the bracket member 32 can be fixed by drilling threaded holes and using screws. This fixing method is relatively simple in installation operation and easy to disassemble, which is convenient for subsequent maintenance. A positioning plate 321 is also provided on the bracket member 32. In this way, before the screw connection, the rectifying member 31 can be abutted against the positioning plate 321 to align the threaded holes of the two, so as to facilitate the subsequent screw connection and improve the connection efficiency.

[0081] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0082] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An oil fume suction machine, characterized in that, Comprising: A housing, within which a smoke exhaust chamber is provided, and the housing is further provided with a smoking port communicating with the smoke exhaust chamber; A fan, arranged within the smoke exhaust chamber and connected to the housing. In the front-rear direction of the housing, the fan includes a first air inlet and a second air inlet arranged opposite to each other; And A flow guiding assembly, arranged within the smoke exhaust chamber and connected to the housing, and located below the fan and above the smoking port. The flow guiding assembly is used for splitting the smoke entering the smoke exhaust chamber from the smoking port into two sub-airflows, and guiding the two sub-airflows to the first air inlet and the second air inlet respectively to enter the fan.

2. The range hood according to claim 1, wherein, In the front-rear direction of the housing, the housing includes a front plate and a rear plate arranged opposite to each other. The first air inlet faces the front plate, and the second air inlet faces the rear plate; The flow guiding assembly includes a rectifying member, which has a first guiding surface and a second guiding surface. The first guiding surface is arranged opposite to the front plate, and the second guiding surface is arranged opposite to the rear plate. In the direction of the smoking port approaching the fan, the distance between the first guiding surface and the second guiding surface gradually decreases.

3. The range hood according to claim 2, wherein, The rectifying member is located directly below the fan, and the second guiding surface extends obliquely along the direction close to the front plate from the bottom of the fan.

4. The range hood according to claim 3, characterized in that, The front plate includes a first plate body, a second plate body, and a third plate body connected in sequence. The first plate body is arranged opposite to the fan, the third plate body is provided with the smoking port, the second plate body is inclined towards the rear plate, and the intersection position of the first guiding surface and the second guiding surface is spaced from the second plate body.

5. The range hood according to claim 4, characterized in that, The distance between the intersection position of the first guiding surface and the second guiding surface and the second plate body is L, satisfying: L is greater than or equal to 30 millimeters; And / or, the range of the included angle between the vertical axis of the surface of the second plate body facing the rear plate and the central axis of the rectifying member is between 0° and 20°.

6. The range hood according to claim 2, wherein, In the height direction of the housing, the smoke exhaust chamber includes a smoke collecting sub-chamber, a transition sub-chamber, and a fan sub-chamber arranged in sequence from bottom to top. The fan is located within the fan sub-chamber, the smoking port communicates with the chamber wall of the smoke collecting sub-chamber, and the distance between the opposite two chamber walls of the transition sub-chamber in the front-rear direction gradually increases from bottom to top; The intersection position of the first guiding surface and the second guiding surface is located at the connection position of the smoke collecting sub-chamber and the transition sub-chamber or below the connection position of the smoke collecting sub-chamber and the transition sub-chamber.

7. The range hood according to claim 6, characterized in that, In the front-rear direction, the rectifying member further includes a third guiding surface and a fourth guiding surface. The third guiding surface is connected to the side of the first guiding surface close to the fan, and the fourth guiding surface is connected to the side of the second guiding surface close to the fan; In the height direction of the housing, the third guiding surface extends obliquely upwards towards the rear plate, and the fourth guiding surface extends obliquely towards the surface of the fan close to the rear plate.

8. The range hood according to claim 7, wherein, The third guide surface intersects with the fourth guide surface to form a first angle, and the first angle is greater than or equal to 60° and less than or equal to 100°.

9. The range hood according to claim 2, wherein A vertical distance between a side of the rectifying member close to the front plate and a side of the rectifying member close to the rear plate is D, and D is less than or equal to 30 mm; And / or, the first guide surface and the second guide surface intersect to form a second angle, and the second angle is greater than or equal to 5° and less than or equal to 20°; And / or, the distance between the surface of the fan at the first air inlet and the front plate is smaller than the distance between the surface of the fan at the second air inlet and the rear plate.

10. The range hood according to any one of claims 2 to 9, characterized in that, The rectifying component comprises a back plate and a sound absorbing layer. The back plate is provided with an installation cavity and an installation opening communicating with the installation cavity. The sound absorbing layer passes through the installation opening and is fixed in the installation cavity.

11. The range hood according to claim 10, wherein, A plurality of sound-absorbing through holes communicating with the installation cavity are provided on a side of the back plate away from the installation opening, and the plurality of sound-absorbing through holes are arranged in an array.

12. The range hood according to claim 11, wherein, The suction force of the second air inlet is greater than the suction force of the first air inlet, and the mounting port is arranged toward the rear plate; The exposed area of ​​the sound absorbing layer at the installation opening is larger than the exposed area of ​​the sound absorbing layer at the plurality of sound absorbing through holes.

13. The range hood according to claim 10, characterized in that, The back plate comprises: A bottom panel, the bottom panel having a first direction and a second direction arranged at an angle; Two side panels, the two side panels are respectively connected to two opposite sides of the bottom panel in the first direction; and Two flanges, the two flanges are respectively bent and connected to two opposite sides of the bottom panel in the second direction, and are located between the two side panels; The two flanges, the bottom panel and the two side panels are combined to form the installation cavity, and the two flanges cooperate to form the installation opening. The two flanges are used to abut against the sound absorbing layer and fix it in the installation cavity.

14. The range hood according to any one of claims 2 to 9, characterized in that, The guide assembly includes two bracket components, the two bracket components are connected to the rear plate, and the two bracket components are detachably connected to opposite ends of the rectifying component in the length direction.

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