Range hood

Abstract

The utility model relates to the technical field of kitchen appliances, and particularly discloses a range hood which comprises an exhaust fume collecting hood, a mainframe box, a main fan, an auxiliary air duct and an auxiliary fan, and the exhaust fume collecting hood is provided with a main air inlet and an auxiliary air inlet; the mainframe box is communicated with the exhaust fume collecting hood; the main fan is mounted in the main case, and the main fan is provided with a main air duct, an air inlet communicated with the main case and the main air duct, and an exhaust port communicated with the main air duct; the auxiliary fan is arranged in the auxiliary air duct, the two ends of the auxiliary air duct communicate with the auxiliary air inlet and the main air duct correspondingly, under negative pressure driving of the auxiliary fan, oil smoke can be directly discharged into the main air duct of the main fan, the negative pressure of the main fan cannot be wasted, and therefore the oil smoke discharging effect of the main fan cannot be affected; the oil smoke exhaust capacity of the range hood is equivalent to the superposition of the effects of a main fan and an auxiliary fan, so that the oil smoke exhaust performance of the range hood is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and in particular to a range hood. Background Technology

[0002] As an essential kitchen appliance, the main function of a range hood is to quickly and effectively remove cooking fumes to keep the kitchen air fresh. With increasing emphasis on kitchen environment and health, the performance requirements for range hoods are also rising.

[0003] An existing technology provides a range hood, including a smoke collection hood, a smoke guide plate, a fan hood, an auxiliary fan, a main fan, and a secondary smoke guide channel. The smoke collection hood has a first air inlet and a second air inlet arranged near the first air inlet. The fan hood is located above the first air inlet, and its inner cavity forms the main smoke guide channel. The main fan is located in the main smoke guide channel, and the auxiliary fan is located above the smoke collection hood, with its air inlet corresponding to the second air inlet. The secondary smoke guide channel is located above the smoke collection hood and is used to guide the smoke from bottom to top through the second air inlet into the main smoke guide channel. When the auxiliary fan of the range hood works in conjunction with the main fan, it can improve the flow field above the smoke guide plate, increase the negative pressure around the smoke guide plate, effectively improve the smoke absorption speed, prevent smoke from escaping from around the smoke guide plate, and improve the smoke absorption effect. However, this range hood has the following problems:

[0004] 1) The auxiliary fan only guides the fumes into the main smoke guide channel. The main fan is still needed to discharge the fumes in the smoke guide channel to the exhaust pipe, which has a limited effect on improving the performance of the range hood in exhausting fumes.

[0005] 2) When the main fan is used alone, the secondary smoke guide channel will cause wind pressure loss, affecting the smoke extraction effect of the main fan;

[0006] 3) When the auxiliary fan is used alone, the oil fumes that enter the main smoke guide channel will escape from the first air inlet. Utility Model Content

[0007] The purpose of this utility model is to provide a range hood with improved performance in removing cooking fumes.

[0008] This utility model provides a range hood, which includes:

[0009] The smoke hood is equipped with a main air inlet and an auxiliary air inlet;

[0010] The main unit is connected to the smoke collection hood;

[0011] The main fan is installed inside the main unit housing. The main fan has a main air duct, an air inlet that is connected to the main unit housing and the main air duct respectively, and an exhaust port that is connected to the main air duct.

[0012] An auxiliary air duct, the two ends of which are connected to the auxiliary air inlet and the main air duct, respectively;

[0013] An auxiliary fan is installed in the auxiliary air duct.

[0014] As a preferred technical solution for the range hood, the range hood further includes a control valve disposed in the auxiliary air duct, the control valve being configured to prevent airflow from the main air duct to the auxiliary air inlet.

[0015] As a preferred technical solution for the range hood, the range hood further includes a smoke-collecting plate, which is movably connected to the smoke collection hood, and the smoke-collecting plate is used to open or close the main air inlet.

[0016] As a preferred technical solution for range hoods, the auxiliary air duct is connected to the main air duct through multiple spaced air outlets.

[0017] As a preferred technical solution for range hoods, the air outlet faces the exhaust port.

[0018] As a preferred technical solution for range hoods, the auxiliary air inlet is oriented downwards.

[0019] As a preferred technical solution for the range hood, the range hood further includes a support member, and the auxiliary air duct is fixed to the support member;

[0020] The support member is fixed to the main unit housing; and / or, the support member is fixed to the smoke collection hood.

[0021] As a preferred technical solution for the range hood, when the support member is simultaneously fixed to both the main unit housing and the smoke collection hood:

[0022] The auxiliary air duct includes a cover, and a first air duct and a second air duct arranged at an angle. The cover is connected to the auxiliary air inlet, the first air duct is connected to the cover, and the second air duct is connected to the main air duct.

[0023] The support includes a first bracket and a second bracket connected at an angle. The first bracket is fixedly connected to the rear wall of the main unit chassis, and the second bracket is fixedly connected to the smoke hood. The first air duct is disposed on the first bracket, and the second air duct is disposed on the second bracket.

[0024] As a preferred technical solution for a range hood, the first bracket includes a first side and a second side spaced apart, a bottom surface connected between the bottom end of the first side and the bottom end of the second side, a top surface located between the first side and the second side, a first oil guiding surface connected between the top end of the first side and the top surface, and a second oil guiding surface connected between the top end of the second side and the top surface, with the first air duct disposed on the top surface.

[0025] The distance between the first oil guiding surface and the second oil guiding surface gradually increases from top to bottom; and / or, the distance between the first side surface and the second side surface gradually decreases from top to bottom.

[0026] As a preferred technical solution for a range hood, the smoke collection hood includes a front side plate arranged parallel to the front wall of the main unit box, and a baffle connected between the front side plate and the front wall. The front side plate is located behind the front wall, the baffle is inclined, the front end of the baffle is higher than the rear end of the baffle, and the rear end of the hood is lower than the front end of the hood.

[0027] The rear end of the cover is provided with an oil leakage hole; and / or, the baffle is provided with a flange, the flange is arranged around the auxiliary air inlet, and the flange is covered inside the cover.

[0028] The range hood provided by this utility model has at least the following beneficial effects:

[0029] The auxiliary air duct of this range hood is connected to the auxiliary air inlet and the main air duct of the main fan at both ends. Driven by the negative pressure of the auxiliary fan, the fumes are discharged directly into the main air duct of the main fan through the auxiliary air inlet and the auxiliary air duct. This part of the fumes will not waste the negative pressure of the main fan, thus not affecting the fumes exhaust effect of the main fan, and effectively improving the fumes exhaust performance of the range hood. Attached Figure Description

[0030] Figure 1 This is a cross-sectional view of the range hood in an embodiment of this utility model;

[0031] Figure 2 This is a schematic diagram of the structure of the range hood in the embodiment of this utility model;

[0032] Figure 3 This is a schematic diagram of the air outlet structure in an embodiment of this utility model;

[0033] Figure 4 This is a schematic diagram of the auxiliary air duct, support member, and auxiliary fan in an embodiment of this utility model;

[0034] Figure 5 for Figure 1 Enlarged view of point A in the middle;

[0035] In the picture:

[0036] 1. Smoke hood; 11. Main air inlet; 12. Auxiliary air inlet; 13. Front side panel; 14. Baffle; 15. Flange;

[0037] 2. Main unit chassis; 21. Front wall; 22. Rear wall;

[0038] 3. Main fan; 31. Volute; 311. Main air duct; 312. Air inlet; 313. Exhaust outlet; 32. Impeller;

[0039] 4. Auxiliary air duct; 41. Cover; 411. Oil leakage hole; 42. First air duct; 43. Second air duct;

[0040] 5. Auxiliary fan; 6. Control valve; 7. Smoke collection plate;

[0041] 8. Support component; 81. First bracket; 811. First side surface; 812. Second side surface; 813. Bottom surface; 814. Top surface; 815. First oil guide surface; 816. Second oil guide surface; 82. Second bracket;

[0042] 9. Air outlet. Detailed Implementation

[0043] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0044] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0047] This embodiment provides a range hood, which can be a top-mounted range hood, a side-mounted range hood, etc. This range hood can be used in the kitchen to treat the oil fumes generated during cooking.

[0048] like Figure 1 and Figure 2 As shown, the range hood includes a smoke collection hood 1, a main unit 2, a main fan 3, an auxiliary air duct 4, and an auxiliary fan 5. The smoke collection hood 1 has a main air inlet 11 and an auxiliary air inlet 12; the main unit 2 is connected to the smoke collection hood 1; the main fan 3 is installed inside the main unit 2 and has a main air duct 311, an air inlet 312, and an exhaust outlet 313. The air inlet 312 is connected to both the main unit 2 and the main air duct 311, and the exhaust outlet 313 is connected to the main air duct 311; both ends of the auxiliary air duct 4 are connected to the auxiliary air inlet 12 and the main air duct 311, respectively; the auxiliary fan 5 is disposed within the auxiliary air duct 4. In this embodiment, the range hood provides a range hood where, under the negative pressure drive of the auxiliary fan 5, the fumes are directly discharged into the main duct 311 of the main fan 3 via the auxiliary air inlet 12 and the auxiliary air duct 4. The fumes are then mixed with the fumes drawn into the main duct 311 by the main fan 3 and discharged into the exhaust duct via the exhaust port 313. The fumes discharged into the main duct 311 by the auxiliary fan 5 do not waste the negative pressure of the main fan 3, thus not affecting the fume extraction effect of the main fan 3. The fume extraction capacity of the range hood is equivalent to the superposition of the effects of the main fan 3 and the auxiliary fan 5, which effectively improves the fume extraction performance of the range hood.

[0049] In an alternative embodiment, please refer to Figure 1The main fan 3 includes a volute 31 and an impeller 32 disposed within the volute 31. The volute 31 is fixedly disposed within the main unit housing 2 and is located inside the main unit housing 2. The volute 31 forms a main air duct 311, an air inlet 312, and an exhaust outlet 313. The air inlet 312 communicates with the inner cavity of the main unit housing 2, and the exhaust outlet 313 communicates with the smoke exhaust channel. Driven by the impeller 32, fumes enter the main air duct 311 from the main air inlet 11 through the inner cavity of the smoke collection hood 1 and the inner cavity of the main unit housing 2 via the air inlet 312, and are discharged into the smoke exhaust channel via the exhaust outlet 313. The volute 31 may have one air inlet 312 located at one axial end of the impeller 32; or the volute 31 may have two air inlets 312 located at opposite axial ends of the impeller 32.

[0050] In an alternative embodiment, please refer to Figure 3 The auxiliary air duct 4 is connected to the main air duct 311 through multiple spaced air outlets 9. With this configuration, when the main fan 3 is turned on alone, the multiple air outlets 9 can reduce the pressure loss in the main air duct 311 and reduce the amount of oil fumes entering the auxiliary air duct 4 from the main air duct 311, thus reducing the impact on the oil fume extraction effect of the main fan 3.

[0051] In one optional embodiment, the air outlet 9 can be the inner hole of a pipe, that is, the auxiliary air duct 4 and the main air duct 311 are connected through multiple pipes. In other embodiments, the air outlet 9 can also be an opening provided on the sheet metal. For example, multiple air outlets 9 can all be provided on the volute 31, and the duct wall of the auxiliary air duct 4 is directly fixed to the volute 31; or, multiple air outlets 9 can all be provided on the duct wall of the auxiliary air duct 4, the auxiliary air duct 4 is inserted into the volute 31, and multiple air outlets 9 are all connected to the main air duct 311.

[0052] In an alternative embodiment, please refer to Figure 1 The air outlet 9 is positioned facing the exhaust vent. With this configuration, when the auxiliary fan 5 is operating, the fumes in the auxiliary duct 4 enter the main duct 311 through the air outlet 9 and flow directly towards the exhaust vent, making it easier to expel these fumes and improving the range hood's fume extraction capacity. Alternatively, the air outlet 9 can be positioned closer to the exhaust vent. This closer proximity allows fumes entering the main duct 311 through the air outlet 9 to more easily reach the exhaust vent when the auxiliary fan 5 is operating, similarly enhancing the range hood's fume extraction capacity.

[0053] In an alternative embodiment, please refer to Figure 1The range hood also includes a control valve 6, which is located in the auxiliary air duct 4 and prevents airflow from the main air duct 311 to the auxiliary air inlet 12. By using the control valve 6, when the main fan 3 is turned on independently, even if the fumes in the main air duct 311 enter the auxiliary air duct 4 through multiple air outlets 9, the fumes will ultimately be unable to flow to the auxiliary air inlet 12. This completely prevents the main fan 3 from being depressurized, thus ensuring that the fume extraction effect of the main fan 3 is not affected, while also reducing noise.

[0054] The control valve 6 can be configured as a one-way valve, allowing airflow only from the auxiliary air inlet 12 to the main flue and preventing airflow from the main flue to the auxiliary air inlet 12. Preferably, the one-way valve is located between the auxiliary fan 5 and the main air duct 311. In other embodiments, the one-way valve can also be located between the auxiliary fan 5 and the auxiliary air inlet 12. Alternatively, the control valve 6 can be configured as a switch valve, capable of opening or closing the auxiliary air duct 4. When the main fan 3 is turned on alone, closing the auxiliary air duct 4 via the switch valve can block airflow between the auxiliary air inlet 12 and the main air duct 311.

[0055] In an alternative embodiment, please refer to Figure 1 and Figure 2 The range hood also includes a smoke-collecting plate 7, which is movably connected to the smoke collection hood 1 and is used to open or close the main air inlet 11. When only the auxiliary fan 5 is turned on, after the auxiliary fan 5 discharges the fumes into the main air duct 311, the fumes will enter the inner cavity of the main unit box 2 and the inner cavity of the smoke collection hood 1 through the air inlet 312. At this time, by closing the main air inlet 11 through the smoke-collecting plate 7, the fumes can be prevented from leaking into the room from the main air inlet 312 of the smoke collection hood 1, thereby preventing the auxiliary fan 5 from being depressurized and ensuring that the smoke extraction effect of the auxiliary fan 5 is not affected. In other embodiments, the smoke-collecting plate 7 can also be replaced by a valve. The valve can be set at the air inlet 312 of the main fan 3 to open or close the air inlet 312, or the valve can be set inside the smoke collection hood 1. The valve can isolate or connect the inner cavity of the smoke collection hood 1, which can also prevent the auxiliary fan 5 from being depressurized when working alone.

[0056] In one optional embodiment, the power of the main fan 3 is greater than the power of the auxiliary fan 5. When the range hood is operating, it can adjust its operation based on the concentration of cooking fumes: when the fume concentration is low, only the auxiliary fan 5 is activated; when the fume concentration is high, only the main fan 3 is activated; and when the fume concentration is very high, both the main fan 3 and the auxiliary fan 5 are activated simultaneously. This allows the range hood to have three different fume extraction capabilities, thus adapting to different fume extraction needs under varying fume concentrations. In other embodiments, the power of the main fan 3 can also be equal to the power of the auxiliary fan 5.

[0057] In an alternative embodiment, please refer to Figure 1 The auxiliary air inlet 12 is positioned downwards, with the vertical direction as follows: Figure 1 The direction indicated by the middle arrow ab. Specifically, the fumes generated during cooking will flow upwards. The auxiliary fan 5 is located in the path of the rising fumes, so the fumes can be drawn into the auxiliary air duct 4 without changing their flow direction or with only a slight change, ensuring the fume extraction capacity of the auxiliary fan 5. Especially when the power of the auxiliary fan 5 is less than that of the main fan 3, the fume extraction effect can be guaranteed even when the auxiliary fan 5 is used alone.

[0058] In an alternative embodiment, please refer to Figure 1 and Figure 2 The main air intake 11 faces forward. The front-to-back direction is as follows: Figure 1 The direction indicated by the middle arrow cd. Specifically, the range hood is a side-draft range hood, and the main air inlet 11 is located below the auxiliary air inlet 12. In other embodiments, the main air inlet 11 can also be opened downwards, in which case the range hood is a top-draft range hood.

[0059] In an optional embodiment, the fume hood 1 includes a front side panel 13 arranged parallel to the front wall 21 of the main unit housing 2, and a baffle 14 connecting the front side panel 13 and the front wall 21. The front side panel 13 is located behind the front wall 21, the main air inlet 11 is disposed on the front side panel 13, and the auxiliary air inlet 12 is disposed on the baffle 14. Specifically, the main air inlet 11 is located at the lower end of the front side panel 13. This arrangement causes the main air inlet 11 to face forward, and the auxiliary air inlet 12 to face downward. It is understood that the baffle 14 extends forward relative to the front wall 21 and can be located above the stove, so that the auxiliary air inlet 12 can be located in the path of the upward flow of oil fumes.

[0060] In an alternative embodiment, please refer to Figures 1 to 3 The range hood also includes a support member 8, to which the auxiliary air duct 4 is fixed. The support member 8 is also fixed to the main unit housing 2 and the baffle 14. This arrangement ensures the stability of the auxiliary air duct 4 within the main unit housing 2 and the smoke collection hood 1. In other embodiments, the support member 8 may be fixed only to the main unit housing 2 or only to the smoke collection hood 1, depending on the requirements. Preferably, the auxiliary air duct 4 can be machined from sheet metal, giving it strong structural strength and a long service life. In other embodiments, the auxiliary air duct 4 may also be a corrugated pipe.

[0061] In an optional embodiment, the structural shape of the support member 8 can be set according to the structural shape of the auxiliary air duct 4. Specifically, please refer to... Figures 1 to 3The auxiliary air duct 4 includes a housing 41, and a first air duct 42 and a second air duct 43 arranged at an angle. The housing 41 is connected to the auxiliary air inlet 12, the first air duct 42 is connected to the housing 41, and the second air duct 43 is connected to the main air duct 311. The support member 8 includes a first bracket 81 and a second bracket 82 connected at an angle. The first bracket 81 is fixedly connected to the rear wall 22 of the main unit housing 2, and the second bracket 82 is fixedly connected to the baffle 14. The first air duct 42 is disposed on the first bracket 81, and the second air duct 43 is disposed on the second bracket 82. Specifically, the housing 41 is fitted to the baffle 14. This arrangement, with the first bracket 81 supporting the first air duct 42 and the second bracket 82 supporting the second air duct 43, can further improve the positional stability of the auxiliary air duct 4.

[0062] In an optional embodiment, both the first air duct 42 and the second air duct 43 are arranged in a V-shape, as are the first bracket 81 and the second bracket 82. Specifically, both the second bracket 82 and the second air duct 43 are arranged vertically, while both the first bracket 81 and the first air duct 42 are arranged at an angle. The top end of the first bracket 81 is connected to the second bracket 82, and the bottom end of the first bracket 81 is connected to the baffle 14. The bottom end of the first air duct 42 is connected to the cover 41, and the top end of the first air duct 42 is connected to the second air duct 43.

[0063] In one optional embodiment, the bottom end of the first bracket 81 is welded to the baffle 14, and the second bracket 82 is fitted to the rear wall 22 of the main unit chassis 2, and the second bracket 82 is welded to the rear wall 22 of the main unit chassis 2. In other embodiments, the first bracket 81 may also be fixed to the baffle 14 with screws, and the second bracket 82 may be fixed to the rear wall 22 of the main unit chassis 2 with screws.

[0064] In one optional embodiment, the auxiliary fan 5 is positioned at the junction of the first air duct 42 and the second air duct 43, ensuring that the fumes in the auxiliary air duct 4 only have their direction of movement changed by the auxiliary fan 5, resulting in low wind resistance. Furthermore, the auxiliary fan 5 is supported by both the first bracket 81 and the second bracket 82, ensuring the stability of its position. In other embodiments, the auxiliary fan 5 can be positioned in either the first air duct 42 or the second air duct 43, depending on the requirements.

[0065] In an optional embodiment, the support member 8 and the auxiliary air duct 4 are both centrally located along the left-right direction. The support member 8 is spaced apart from the left and right ends of the inner cavity of the fume hood 1, the support member 8 is spaced apart from the left and right ends of the inner cavity of the main unit box 2, the auxiliary air duct 4 is spaced apart from the left and right ends of the inner cavity of the fume hood 1, and the auxiliary air duct 4 is spaced apart from the left and right ends of the inner cavity of the main unit box 2, so as to ensure that the fumes flow smoothly between the inner cavity of the fume hood 1 and the inner cavity of the main unit box 2.

[0066] In an alternative embodiment, please refer to Figure 3The first bracket 81 includes a first side surface 811 and a second side surface 812 spaced apart, a bottom surface 813 connected between the bottom end of the first side surface 811 and the bottom end of the second side surface 812, a top surface 814 located between the first side surface 811 and the second side surface 812, a first oil guiding surface 815 connected between the top end of the first side surface 811 and the top surface 814, a second oil guiding surface 816 connected between the top end of the second side surface 812 and the top surface 814, and a first air duct 42 disposed on the top surface 814; the distance between the first oil guiding surface 815 and the second oil guiding surface 816 gradually increases from top to bottom; and / or, the distance between the first side surface 811 and the second side surface 812 gradually decreases from top to bottom. In this embodiment, an exemplary scheme is provided in which the distance between the first oil guiding surface 815 and the second oil guiding surface 816 gradually increases from top to bottom, and the distance between the first side surface 811 and the second side surface 812 gradually decreases from top to bottom. When the main fan 3 is working, the oil fumes flow from the inner cavity of the fume hood 1 into the inner cavity of the main unit box 2. Since the first bracket 81 and the first air duct 42 are both spanned between the baffle 14 and the rear wall 22 of the main unit box 2, oil stains easily accumulate on the surfaces of the first bracket 81 and the first air duct 42. The oil stains on the surface of the first air duct 42 will flow to the top surface 814, and then flow to the first side surface 811 under the guidance of the first oil guiding surface 815, and flow to the second side surface 812 under the guidance of the second oil guiding surface 816. After gathering at the lower ends of the first side surface 811 and the lower ends of the second side surface 812, they drip into the inner cavity of the fume hood 1 for collection, and finally collect in the oil cup below the fume hood 1. In other embodiments, the distance between the first oil guiding surface 815 and the second oil guiding surface 816 may gradually increase from top to bottom, or the distance between the first side surface 811 and the second side surface 812 may gradually decrease from top to bottom, as needed.

[0067] In an alternative embodiment, the first air duct 42 is centrally located on the top surface 814 along the left-right direction, and the width of the first air duct 42 along the left-right direction is smaller than the width of the top surface 814 along the left-right direction, so that after the oil drips from the first air duct 42, it can all be collected on the top surface 814, and then collected into the inner cavity of the smoke hood 1 through the outer surface of the first bracket 81.

[0068] In one optional embodiment, both the first oil guiding surface 815 and the second oil guiding surface 816 are planar, and both form a 45° angle with the top surface 814. In other embodiments, the angle between the first oil guiding surface 815 and the second oil guiding surface 816 and the top surface 814 can be set according to actual needs; or, the first oil guiding surface 815 and the second oil guiding surface 816 can also be set as arc-shaped surfaces.

[0069] In one alternative embodiment, both the first side surface 811 and the second side surface 812 form a 60° angle with the bottom surface 813. In other embodiments, the angle between the first side surface 811 and the second side surface 812 and the bottom surface 813 can be set according to actual needs.

[0070] In an optional embodiment, the baffle 14 is inclined, with its front end higher than its rear end, and the rear end of the cover 41 lower than its front end. An oil drain hole 411 is provided at the rear end of the cover 41. With this configuration, the oil accumulated on the baffle 14 can flow downwards under its own weight and collect in the inner cavity of the fume hood 1. Simultaneously, the oil on the inner wall of the first air duct 42 can flow into the inner wall of the cover 41 under its own weight, and can collect on the inner surface of the baffle 14. Then, it can collect along the baffle 14 to the rear end of the cover 41 and flow out through the oil drain hole 411, thus achieving the collection of oil in the auxiliary air duct 4.

[0071] In an optional embodiment, the baffle 14 is provided with a flange 15, which surrounds the auxiliary air inlet 12 and is covered within the housing 41. By providing the flange 15 for blocking, oil stains on the surface of the baffle 14 located inside the housing 41 can be prevented from flowing into the auxiliary air inlet 12, ensuring that the oil stains can eventually collect at the rear end of the housing 41 and flow out from the oil leakage hole 411, and further collect into the inner cavity of the fume hood 1.

[0072] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A range hood, characterized in that, include: The smoke hood (1) is equipped with a main air inlet (11) and an auxiliary air inlet (12); The main unit (2) is connected to the smoke collection hood (1); The main fan (3) is installed in the main unit box (2). The main fan (3) is provided with a main air duct (311), an air inlet (312) that is connected to the main unit box (2) and the main air duct (311) respectively, and an exhaust port (313) that is connected to the main air duct (311). Auxiliary air duct (4), the two ends of which are connected to the auxiliary air inlet (12) and the main air duct (311) respectively; An auxiliary fan (5) is installed in the auxiliary air duct (4).

2. The range hood according to claim 1, characterized in that, The range hood also includes a control valve (6) disposed in the auxiliary air duct (4), the control valve (6) being configured to prevent airflow from the main air duct (311) to the auxiliary air inlet (12).

3. The range hood according to claim 1, characterized in that, The range hood also includes a smoke collection plate (7), which is movably connected to the smoke collection hood (1) and is used to open or close the main air inlet (11).

4. The range hood according to claim 1, characterized in that, The auxiliary air duct (4) is connected to the main air duct (311) through a plurality of spaced air outlets (9).

5. The range hood according to claim 4, characterized in that, The air outlet (9) faces the exhaust port (313).

6. The range hood according to any one of claims 1-5, characterized in that, The auxiliary air inlet (12) is opened downwards.

7. The range hood according to claim 6, characterized in that, The range hood also includes a support member (8), and the auxiliary air duct (4) is fixed to the support member (8); The support member (8) is fixed to the main unit housing (2); and / or, the support member (8) is fixed to the smoke collection hood (1).

8. The range hood according to claim 7, characterized in that, When the support member (8) is simultaneously fixed to the main unit housing (2) and the smoke hood (1): The auxiliary air duct (4) includes a cover (41), and a first air duct (42) and a second air duct (43) arranged at an angle. The cover (41) is connected to the auxiliary air inlet (12), the first air duct (42) is connected to the cover (41), and the second air duct (43) is connected to the main air duct (311). The support member (8) includes a first bracket (81) and a second bracket (82) connected at an angle. The first bracket (81) is fixedly connected to the rear wall (22) of the main unit (2), and the second bracket (82) is fixedly connected to the smoke hood (1). The first air duct (42) is disposed on the first bracket (81), and the second air duct (43) is disposed on the second bracket (82).

9. The range hood according to claim 8, characterized in that, The first bracket (81) includes a first side surface (811) and a second side surface (812) spaced apart, a bottom surface (813) connected between the bottom end of the first side surface (811) and the bottom end of the second side surface (812), a top surface (814) located between the first side surface (811) and the second side surface (812), a first oil guiding surface (815) connected between the top end of the first side surface (811) and the top surface (814), and a second oil guiding surface (816) connected between the top end of the second side surface (812) and the top surface (814), and the first air duct (42) is disposed on the top surface (814); The distance between the first oil guiding surface (815) and the second oil guiding surface (816) gradually increases from top to bottom; and / or, the distance between the first side surface (811) and the second side surface (812) gradually decreases from top to bottom.

10. The range hood according to claim 8, characterized in that, The smoke hood (1) includes a front side plate (13) arranged parallel to the front wall (21) of the main unit (2), and a baffle (14) connected between the front side plate (13) and the front wall (21). The front side plate (13) is located behind the front wall (21). The baffle (14) is inclined. The front end of the baffle (14) is higher than the rear end of the baffle (14), and the rear end of the cover (41) is lower than the front end of the cover (41). The rear end of the cover (41) is provided with an oil leakage hole (411); and / or, the baffle (14) is provided with a flange (15), the flange (15) is arranged around the auxiliary air inlet (12), and the flange (15) is covered inside the cover (41).

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