Range hood

Abstract

The utility model provides a range hood which comprises a smoke collecting box, a smoke inlet, a smoke outlet, a smoke outlet and a smoke discharging pipe, wherein the front surface of the smoke collecting box is provided with a smoke inlet; the fan is arranged in the smoke collecting box; the air deflector assembly comprises air deflectors, and the air deflectors are arranged on the front side of the smoke inlet at intervals, so that oil smoke flows to the smoke inlet along the peripheries of the air deflectors; the fan is provided with a first air inlet facing the front side of the range hood and a second air inlet facing the rear side of the range hood; the smoke inlets comprise the main smoke inlet and the auxiliary smoke inlet, a main smoke inlet channel is formed between the main smoke inlet and the first air inlet, and an auxiliary smoke inlet channel is formed between the auxiliary smoke inlet and the second air inlet.

Description

Technical Field

[0001] This utility model relates to an oil fume purification device, and more particularly to an oil fume extractor. Background Technology

[0002] As an essential kitchen appliance in every household, the range hood works by using a high-speed rotating impeller in the casing to draw in cooking fumes from the air inlet, filter the fumes using the impeller, and then expel the filtered fumes from the air outlet, thus purifying the kitchen air.

[0003] Some existing range hoods that use dual air intake fans, such as the side-suction range hood with improved air intake efficiency disclosed in Chinese Patent Application No. 201821741463.3, include a casing and a smoke collection hood with a front opening. A smoke guide plate is provided at the front opening of the smoke collection hood. A fan assembly is provided inside the casing. The fan assembly includes a front air inlet and a rear air inlet. The front air inlet and the rear air inlet form a first gap and a second gap between the rear panel and the front panel of the casing, respectively, for airflow to enter. Following the airflow direction, most of the air rises and enters the first gap, entering through the front air inlet of the fan assembly. Another part of the air enters the second gap, entering through the rear air inlet of the fan assembly.

[0004] In this type of range hood, the cooking fumes are first introduced into the internal duct and then diverted to two opposing axial air inlets on the fan casing, achieving dual air intake. However, during this diversion, the airflow tends to swirl, creating turbulence and reducing smoke extraction efficiency, resulting in increased aerodynamic noise. Furthermore, the negative pressure on the guide plate of this type of range hood is concentrated in the center, with limited negative pressure at the edges, leading to weak smoke control, poor anti-interference capabilities, and an inability to effectively prevent smoke from escaping from the edges. Moreover, the limited diffusion range typically fails to adequately extract smoke from the bottom, resulting in inconsistent smoke extraction performance. Utility Model Content

[0005] The first technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a range hood that diverts the oil fume airflow forward, reduces airflow interference, and ensures that the airflow enters the fan smoothly.

[0006] The second technical problem to be solved by this utility model is to provide a range hood that improves the smoke control and anti-interference capabilities of the edge of the air guide plate, in order to address the shortcomings of the existing technology.

[0007] The third technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a range hood that lowers the negative pressure zone, enabling smoke to be drawn from the source at close range and improving the smoke extraction effect.

[0008] The present invention solves the above-mentioned technical problems through the following technical solution:

[0009] A range hood, comprising:

[0010] A smoke collection box, wherein a smoke inlet is provided on the front side of the smoke collection box;

[0011] The fan, which is installed inside the smoke collection box; and,

[0012] An air guide plate assembly, the air guide plate assembly including air guide plates, the air guide plates being spaced apart on the front side of the smoke inlet, so that the oil fumes flow along the outer periphery of the air guide plates toward the smoke inlet;

[0013] Its features are:

[0014] The fan has a first air inlet facing the front of the range hood and a second air inlet facing the rear of the range hood; the air inlet includes a main air inlet and a secondary air inlet, the main air inlet and the first air inlet forming a main air inlet channel, and the secondary air inlet and the second air inlet forming a secondary air inlet channel.

[0015] By connecting the main and auxiliary smoke inlets to one of the fan's air inlets, the smoke inlets are separated at the inlet, thus diverting the oil fume airflow forward. This avoids airflow interference caused by the oil fume airflow entering the range hood's internal duct before being diverted, ensuring that the airflow does not interfere with each other in the oil fume channel and form turbulence, turbulence, or chaotic flow. The oil fume airflow can then smoothly enter the fan, thereby improving the oil fume extraction efficiency.

[0016] Furthermore, to facilitate separation at the smoke inlet, the secondary smoke inlet is arranged around the main smoke inlet.

[0017] Furthermore, to facilitate the setting of the smoke inlet, the smoke collection box includes a box body with an open front side and a panel assembly set at the open front side of the box body. The panel assembly includes an opening located behind the air guide plate and a recessed platform formed by the position corresponding to the opening and recessed into the box body. The main smoke inlet and the secondary smoke inlet are located on the recessed platform.

[0018] Furthermore, the settling platform includes a bottom wall and a peripheral wall formed on the outer periphery of the bottom wall. The peripheral wall extends from the outer periphery of the bottom wall to the outer periphery of the opening. The main smoke inlet is located on the bottom wall, and the secondary smoke inlet is located on the peripheral wall. Thus, the secondary smoke inlet can better surround the outer periphery of the main smoke inlet to achieve uniform flow, and it also achieves a concealed design, not exposed to the air guide plate assembly.

[0019] Furthermore, the panel assembly also includes a panel and a panel support disposed on the side of the panel facing the housing body, the opening being provided on the panel, and the recess being formed on the panel support. In the art, the panel support is typically a sheet metal part, which can easily form a recess and have openings in the recess.

[0020] Furthermore, to facilitate separation at the smoke inlet, the smoke collection box also includes an air guide ring. The front end of the air guide ring is closely attached to the outer periphery of the main smoke inlet, and the rear end of the air guide ring is closely attached to the outer periphery of the first air inlet, so that the first air inlet is only in fluid communication with the main smoke inlet.

[0021] Furthermore, to reduce noise in the fume duct, noise reduction holes are provided on the air guide ring.

[0022] The technical solution adopted by this utility model to solve the second technical problem mentioned above is as follows: the smoke collection box includes a box body with an open front side and a panel assembly disposed at the open front side of the box body, and the main smoke inlet and the auxiliary smoke inlet are disposed on the panel assembly;

[0023] Baffles are provided on both sides of the housing along the width direction of the range hood. The baffles extend forward from the front edge of the housing, thus extending forward beyond the panel assembly.

[0024] Because the negative pressure of the circumferential suction guide plate is concentrated in the middle and the negative pressure at the edge is limited, the smoke control ability is weak. Therefore, baffles are set on both sides of the box to isolate the oil fumes on both sides, prevent the oil fumes from escaping to both sides, and also prevent the surrounding airflow from affecting the oil fumes absorbed by the smoke inlet, thereby improving the range hood's ability to absorb and exhaust oil fumes against interference.

[0025] Furthermore, the top of the housing extends forward beyond the panel assembly, and the portion of the top of the housing extending beyond the panel assembly constitutes a top smoke-gathering section. This top smoke-gathering section also isolates the top airflow from affecting the smoke entering the center of the range hood, improving the range hood's anti-interference capability. In addition, through the arrangement of the side baffles and the top smoke-gathering section, combined with the central ring-suction smoke intake, full ring-suction of the oil fume airflow is achieved, enabling a good smoke extraction effect even without the rotating baffles of a side-suction range hood.

[0026] The technical solution adopted by this utility model to solve the third technical problem mentioned above is as follows: the smoke collection box includes a box body with an open front side and a panel assembly provided at the open front side of the box body, the main smoke inlet and the auxiliary smoke inlet are provided on the panel assembly; the bottom of the box body is provided with an auxiliary smoke inlet that is in fluid communication with the second air inlet of the fan;

[0027] An oil cup is provided at the bottom of the smoke collection box, and the auxiliary smoke inlet is in fluid communication with the outside of the range hood through the gap between the oil cup and the panel assembly.

[0028] Since the diffusion range of the circumferential smoke guide plate is limited, an auxiliary smoke inlet is set at the bottom to move the negative pressure zone downward, so as to achieve the effect of smoking at close range at the smoke source; the main smoke inlet, the secondary smoke inlet and the auxiliary smoke inlet form a three-stage smoke intake structure, so that the oil fumes can be almost completely absorbed and will not escape.

[0029] Furthermore, the oil cup has a front sidewall, which is located on the front side of the panel assembly and forms a gap for the oil fumes to pass through, so as to ensure that the oil fumes enter the oil cup and can further enter the box body through the auxiliary smoke inlet.

[0030] The positive and progressive effects of this utility model are as follows:

[0031] 1. By connecting the main smoke inlet and the auxiliary smoke inlet to one of the air inlets of the fan, the smoke inlets are separated at the smoke inlet. This diverts the oil fume airflow forward, avoiding airflow interference caused by the oil fume airflow entering the air duct of the range hood. This ensures that the airflow will not interfere with each other in the oil fume channel and form turbulence, turbulence and chaotic flow. The oil fume airflow can enter the fan smoothly, thereby improving the oil fume extraction efficiency.

[0032] 2. Because the negative pressure of the circumferential suction guide plate is concentrated in the middle and the negative pressure at the edge is limited, the smoke control ability is weak. Therefore, baffles are set on both sides of the box to isolate the oil fumes on both sides, prevent the oil fumes from escaping to both sides, and also prevent the surrounding airflow from affecting the oil fumes absorbed by the smoke inlet, thereby improving the anti-interference ability of the range hood to absorb and exhaust oil fumes.

[0033] 3. Since the diffusion range of the circumferential smoke guide plate is limited, an auxiliary smoke inlet is set at the bottom to move the negative pressure zone downward, so as to achieve the effect of smoking at close range at the smoke source; the main smoke inlet, the secondary smoke inlet and the auxiliary smoke inlet form a three-stage smoke intake structure, so that the oil fumes can be almost completely absorbed and will not escape. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of a range hood according to an embodiment of the present utility model;

[0035] Figure 2 This is a schematic diagram of the concealed air guide plate assembly of the range hood according to an embodiment of the present utility model;

[0036] Figure 3 This is a schematic diagram of the concealed air guide plate assembly and oil cup of the range hood according to an embodiment of the present utility model;

[0037] Figure 4 This is a schematic diagram of the hidden panel assembly and air guide plate assembly of the range hood according to an embodiment of the present utility model;

[0038] Figure 5 This is a cross-sectional view (horizontal section) of the range hood according to an embodiment of the present utility model;

[0039] Figure 6 This is a cross-sectional view (section and cross-section) of the range hood according to an embodiment of the present utility model. Figure 5 (Parallel, with concealed air intake grille);

[0040] Figure 7 This is a cross-sectional view (front and rear vertical section, with the air inlet mesh hidden) of the range hood according to an embodiment of the present utility model;

[0041] Figure 8 for Figure 7 A magnified schematic diagram of part I;

[0042] Figure 9 This is a schematic diagram of the open state of the air guide plate assembly of the range hood according to an embodiment of the present utility model. Detailed Implementation

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0044] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0045] See Figures 1-8 A range hood includes a smoke collection box 1 and a fan 2 disposed inside the smoke collection box 1.

[0046] The smoke collection box 1 includes a box body 11 with an open front side and a panel assembly 12 disposed at the open front side of the box body 11. The upper and lower edges of the panel assembly 12 extend to the upper and lower edges of the open front side of the box body 11, respectively, thereby closing the open front side of the box body 11. A main smoke inlet 13 is provided on the front of the smoke collection box 1. Preferably, the main smoke inlet 13 is located on the panel assembly 12 and at the center of the panel assembly 12 along the width direction of the range hood. The width direction of the range hood refers to the left-right direction when the user faces the range hood in its normal installation state. (See [reference needed]). Figure 1 As indicated by arrow X. The front of the smoke collection box 1 refers to the side of the range hood facing the user when it is in normal operating condition.

[0047] The panel assembly 12 includes a panel 121 and a panel support 122. The panel 121 is generally made of glass, which is easier to clean and maintain. The panel support 122 is located on the side of the panel 121 facing inwards towards the housing 11. The panel 121 has an opening 123. In this embodiment, preferably, the cross-section of the opening 123 is circular, where the cross-section refers to the cross-section along the thickness direction of the panel 121. The panel support 122 forms a recessed platform 124 at a position corresponding to the opening 123, which is recessed away from the panel 121 (i.e., towards the interior of the housing 11). The shape and size of the recessed platform 124 are adapted to the opening 123, that is, the shape and size of the recessed platform 124 are substantially consistent with the opening 123.

[0048] The recessed platform 124 includes a bottom wall 1241 and a peripheral wall 1242 formed on the outer periphery of the bottom wall 1241. The peripheral wall 1242 extends from the outer periphery of the bottom wall 1241 toward the panel 121 until it reaches the outer periphery of the opening 123, thereby connecting integrally with the rest of the panel support 122. The aforementioned main smoke inlet 13 is formed on the bottom wall 1241, and its preferred cross-section is also circular, where the cross-section refers to the cross-section along the thickness direction of the bottom wall 1241. The main smoke inlet 13 is smaller than the opening 123. The peripheral wall 1242 is provided with secondary smoke inlets 14, which may be arc-shaped in general, and there are multiple secondary smoke inlets 14, which are arranged at intervals along the circumference of the peripheral wall 1242, thereby surrounding the outer periphery of the main smoke inlet 13. In this embodiment, there are six secondary smoke inlets 14, which can almost completely surround the outer periphery of the main smoke inlet 13. Optionally, the number or size of the secondary smoke inlets 14 can also be set as needed, so that they only partially surround the outer periphery of the main smoke inlet 13.

[0049] The fan 2 is housed within the casing 11, and has a first air inlet 21 facing the front of the range hood and a second air inlet 22 facing the rear of the range hood. An air inlet mesh 23 can be installed at the first air inlet 21 for filtration and rectification. The smoke collection box 1 also includes a guide ring 15, which is a complete ring or arc shape. The front end of the guide ring 15 is fitted tightly against the outer periphery of the main smoke inlet 13, and the rear end of the guide ring 15 is fitted tightly against the outer periphery of the first air inlet 21. Thus, the first air inlet 21 is only in fluid communication with the main smoke inlet 13, and the fumes entering from the main smoke inlet 13 can only enter the first air inlet 21. (See [reference]). Figure 6 As indicated by arrow A, this channel constitutes the main smoke inlet channel. The fumes entering the housing 11 from the secondary smoke inlet 14 flow to the rear of the housing 11 and enter the fan 2 through the second air inlet 22. (See [reference]). Figure 6 As indicated by arrow B, this channel constitutes the secondary smoke inlet channel.

[0050] Therefore, the main smoke inlet channel and the secondary smoke inlet channel are separated by the main smoke inlet 13, the secondary smoke inlet 14 and the guide ring 15, so that the oil fume airflow is diverted in front, avoiding a series of problems caused by the diversion of the oil fume airflow after it enters the air duct of the range hood, and ensuring that the airflow will not interfere with each other in the oil fume channel to form turbulence, turbulence and chaotic flow.

[0051] Furthermore, the fumes from the self-contained smoke inlet 13 enter the main smoke inlet channel of the first air inlet 21 after passing through the guide ring 15. The diameter of the bottom wall 1241 where the main smoke inlet 13 is located is larger than the diameter of the guide ring 15, resulting in a multi-stage stepped structure with gradually decreasing dimensions in the main smoke inlet channel. When the fumes flow into the first air inlet 21 through the self-contained smoke inlet channel, they work in conjunction with the exhaust flow of the fan 2 to form a vortex ring that captures and stabilizes the airflow. That is, the fumes generate a vortex ring through the multi-stage stepped structure, which can achieve a vortex-like spiral pressurization effect for fume adsorption. When the fumes flow into the second air inlet 22 through the auxiliary smoke inlet channel, they diffuse inside the housing 11 and are then compressed by the second air inlet 22. In conjunction with the exhaust flow of the fan 2, a vortex ring is formed, which vector-accelerates the fumes and enhances the fume adsorption effect.

[0052] In addition to separating the main smoke inlet channel and the secondary smoke inlet channel, the air guide ring 15 also serves to reduce noise. To this end, noise reduction holes 151 are provided on the air guide ring 15, making it a micro-perforated plate. Optionally, the diameter of the noise reduction holes 151 is 2mm, and the spacing between adjacent noise reduction holes 151 is 8-10mm. Utilizing the principle of micro-perforation noise reduction, the aerodynamic noise in the air inlet channel can be greatly reduced.

[0053] The range hood also includes an air guide plate assembly 3, which includes air guide plates 31 spaced apart on the front side of the opening 123. This allows cooking fumes to enter the opening 123 along the outer periphery of the air guide plates 31, forming a 360° circumferential suction. In this embodiment, the air guide plates 31 are approximately circular, and their dimensions are adapted to fit the opening 123, i.e., substantially the same. See also... Figure 9 Along the width of the range hood, one side of the air guide plate 31 can be rotatably connected to the panel assembly 12, while the opposite side is detachably connected to the panel assembly 12, preferably by means of a snap-fit ​​32. Thus, when cleaning is required, the air guide plate assembly 31 can be easily opened to clean the back of the air guide plate 31 and the panel assembly 12.

[0054] An oil cup 4 is provided at the bottom of the smoke collection box 1. The oil cup 4 is an open-topped cup with a front sidewall 41. The front sidewall 41 of the oil cup 4 can be located on the front side of the panel assembly 12, so that the oil cup 4 can collect the oil flowing down from the panel assembly 12. Preferably, the upper edge of the front sidewall 41 can be higher than the bottom of the panel assembly 12. The gap between the front sidewall 41 and the panel assembly 12 allows the oil fume airflow to pass through. An auxiliary smoke inlet 111 is provided at the bottom of the box 11, which is in fluid communication with the outside of the range hood through the gap between the oil cup 4 and the panel assembly 12. Thus, after the oil fume enters the oil cup 4 through the gap between the front sidewall 41 and the panel assembly 12, it can enter the box 11 upward through the auxiliary smoke inlet 111, and then enter the fan 2 through the second air inlet 22 of the fan 2. The gap between the front sidewall 41 and the panel assembly 12 can optionally be more than 5 mm to allow airflow.

[0055] Therefore, by setting up multiple air intake structures (main smoke inlet 13, secondary smoke inlet 14 and auxiliary smoke inlet 111 at the bottom), the oil fume airflow is diverted to the front, avoiding the problems caused by the oil fume airflow being diverted after entering the internal air duct of the range hood.

[0056] Since the air guide plate assembly 3 in this utility model is fixedly installed, there is no problem of obstructing the view or restricting the cooking space. Using this air guide plate assembly 3, the cooking visibility is good and the cooking operation space is large. However, its smoke collection ability is limited. Therefore, baffles 16 are respectively installed on both sides of the housing 11 along the width direction of the range hood. The baffles 16 extend forward from the front edge of the housing 11, thus extending forward beyond the panel assembly 12. The baffles 16 can isolate the oil fumes on both sides, preventing the oil fumes from escaping to the sides, and also prevent the surrounding airflow from affecting the smoke intake, improving the anti-interference ability of the range hood in collecting and expelling oil fumes. Preferably, each baffle 16 can gradually tilt from back to front towards the direction of another baffle 16 to guide and gather the oil fumes to the air guide plate assembly 3.

[0057] The top of the housing 11 also extends forward beyond the panel assembly 12. Thus, the portion of the top of the housing 11 that extends beyond the panel assembly 12 constitutes the top smoke collection part 112. At the same time, the top smoke collection part 112 also isolates the influence of the top airflow on the smoke entering the middle of the range hood, thereby improving the range hood's anti-interference ability.

[0058] By setting up the side baffles 16 and the top smoke collection part 112, and in conjunction with the middle ring smoke intake, the entire airflow of oil fumes is collected and drawn in, achieving a good smoke extraction effect even without the baffles of the side-suction range hood having a flip-up movement.

[0059] The range hood of this invention forms a 360° annular negative pressure zone at the air guide plate assembly 3, the main smoke inlet 13, and the auxiliary smoke inlet 14, achieving the main effects of smoke extraction, smoke control, and smoke gathering. The auxiliary negative pressure zone formed at the bottom auxiliary smoke inlet 111 further enhances the smoke extraction performance of the range hood, enabling close-range extraction of smoke from the bottom smoke source and absorption of escaping smoke, resulting in better smoke gathering and control. Moreover, the auxiliary smoke inlet 111 is hidden at the bottom of the housing 11, achieving auxiliary smoke intake and oil leakage functions without affecting the appearance. Here, the oil leakage function refers to the fact that oil flowing down the inner wall of the housing 11 can enter the oil cup 4 through the auxiliary smoke inlet 111 and be collected.

[0060] It is understandable that in this embodiment, the main negative pressure zone formed by the air guide plate assembly 3, the main smoke inlet 13, and the auxiliary smoke inlet 14 is a 360° annular negative pressure zone. Compared with rectangular or strip-shaped smoke inlets extending along the width X or height direction of the range hood, the annular negative pressure zone can cover a larger area. For example, rectangular or strip-shaped smoke inlets extend along the width X of the range hood, but their coverage area along the height direction of the range hood is smaller than that of the annular negative pressure zone. When the annular negative pressure zone captures fumes at different heights, it can lock the fumes in different height areas from bottom to top, so as to achieve full-path negative pressure zone coverage of the fume generation area, fume rising area, and fume diffusion area, firmly control the fumes, and prevent the diffusion of fumes in the breathing area.

[0061] Thus, comprehensive smoke control is achieved through a 360° annular ultra-large negative pressure zone (the central annular smoke inlet) and a bottom auxiliary negative pressure zone (at the auxiliary smoke inlet 111). The central annular smoke inlet, combined with the side baffles 16 and the top smoke collection part 112, forms a negative pressure vortex, increasing the negative pressure range and preventing the spread of fumes. The bottom auxiliary smoke inlet 111 lowers the negative pressure zone, allowing for close-range smoking at the smoke source. The overall front-to-back dimensions are controlled within 400mm, reducing the risk of head bumps.

[0062] The aforementioned fan 2 can be controlled by a voice module. A controller, a voice receiving module, and a voice parsing module can be installed on the range hood. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the fan 2 to perform corresponding operations, thereby realizing intelligent control of the range hood and improving the user experience.

[0063] The term "fluid connectivity" as used in this utility model refers to the spatial relationship between two components or parts (hereinafter referred to as the first part and the second part, respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow from the first part along a flow path and / or be transported to the second part. This can be a direct connection between the first part and the second part, or an indirect connection between the first part and the second part through at least one third party. The third party can be a fluid channel such as a pipe, channel, conduit, air guide ring, hole, groove, or a chamber that allows fluid to flow through, or a combination of the above.

Claims

1. A range hood, comprising: A smoke collection box (1) is provided with a smoke inlet on the front side; A fan (2) is installed inside a smoke collection box (1); and, The air guide plate assembly (3) includes an air guide plate (31) which is spaced apart on the front side of the smoke inlet, so that the oil fumes flow along the outer periphery of the air guide plate (31) to the smoke inlet; Its features are: The fan (2) has a first air inlet (21) facing the front of the range hood and a second air inlet (22) facing the rear of the range hood; the air inlet includes a main air inlet (13) and a secondary air inlet (14), the main air inlet (13) and the first air inlet (21) form a main air inlet channel, and the secondary air inlet (14) and the second air inlet (22) form a secondary air inlet channel.

2. The range hood according to claim 1, characterized in that: The secondary smoke inlet (14) is arranged on the outer periphery of the main smoke inlet (13).

3. The range hood according to claim 2, characterized in that: The smoke collection box (1) includes a box body (11) with an open front side and a panel assembly (12) provided at the open front side of the box body (11). The panel assembly (12) includes an opening (123) located behind the air guide plate (31) and a recessed platform (124) formed by the position corresponding to the opening (123) and recessed into the box body (11). The main smoke inlet (13) and the secondary smoke inlet (14) are provided on the recessed platform (124).

4. The range hood according to claim 3, characterized in that: The settling platform (124) includes a bottom wall (1241) and a peripheral wall (1242) formed on the outer periphery of the bottom wall (1241). The peripheral wall (1242) extends from the outer periphery of the bottom wall (1241) to the outer periphery of the opening (123). The main smoke inlet (13) is opened on the bottom wall (1241), and the secondary smoke inlet (14) is opened on the peripheral wall (1242).

5. The range hood according to claim 3, characterized in that: The panel assembly (12) further includes a panel (121) and a panel bracket (122) disposed on the side of the panel (121) facing the inside of the housing (11), the opening (123) is disposed on the panel (121), and the recess (124) is formed on the panel bracket (122).

6. The range hood according to any one of claims 1 to 5, characterized in that: The smoke collection box (1) also includes a guide ring (15). The front end of the guide ring (15) is closely attached to the outer periphery of the main smoke inlet (13), and the rear end of the guide ring (15) is closely attached to the outer periphery of the first air inlet (21), so that the first air inlet (21) is only in fluid communication with the main smoke inlet (13).

7. The range hood according to claim 6, characterized in that: The air guide ring (15) is provided with noise reduction holes (151).

8. The range hood according to claim 1, characterized in that: The smoke collection box (1) includes a box body (11) with an open front side and a panel assembly (12) provided at the open front side of the box body (11). The main smoke inlet (13) and the secondary smoke inlet (14) are provided on the panel assembly (12). Baffles (16) are provided on both sides of the housing (11) along the width direction of the range hood. The baffles (16) extend forward from the front edge of the housing (11) so that the baffles (16) extend forward beyond the panel assembly (12).

9. The range hood according to claim 8, characterized in that: The top of the housing (11) also extends forward beyond the panel assembly (12), and the portion of the top of the housing (11) that extends beyond the panel assembly (12) constitutes the top smoke collection part (112).

10. The range hood according to claim 1, characterized in that: The smoke collection box (1) includes a box body (11) with an open front side and a panel assembly (12) provided at the open front side of the box body (11). The main smoke inlet (13) and the auxiliary smoke inlet (14) are provided on the panel assembly (12). The bottom of the box body (11) is provided with an auxiliary smoke inlet (111) that is in fluid communication with the second air inlet (22) of the fan (2). The bottom of the smoke collection box (1) is provided with an oil cup (4), and the auxiliary smoke inlet (111) is in fluid communication with the outside of the range hood through the gap between the oil cup (4) and the panel assembly (12).

11. The range hood according to claim 10, characterized in that: The oil cup (4) has a front sidewall (41) located on the front side of the panel assembly (12) and forming a gap for the passage of oil fumes.

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