Air supply module and range hood

Abstract

The utility model relates to an air supply module and a range hood. The air supply module comprises a range hood module and an air supply module body. The range hood module comprises a range hood shell and a smoke gathering cover, the smoke gathering cover is connected with the range hood shell, and the range hood shell is provided with a mounting platform located above the smoke gathering cover. The air supply module is arranged outside the range hood shell and located on the installation platform. The air supply module comprises a fan shell and a cross-flow wind wheel, a cross-flow air duct is arranged in the fan shell, and the cross-flow wind wheel is arranged in the cross-flow air duct. According to the air supply module, the cross-flow wind wheel is adopted to increase the air supply range, and the air supply module is arranged outside the range hood shell and is not limited by the size and the structure of the space in the range hood shell. In this way, the air supply module can be provided with a cross-flow wind wheel with the larger impeller diameter, and air supply with the larger air volume and the larger range is achieved. Besides, the air supply airflow of the air supply module is farther away from the smoke suction port of the range hood module, so that the mutual influence of the air supply airflow and the smoke suction airflow can be reduced, namely, the interference of the air supply airflow on the smoke suction of the range hood module is reduced, and the air supply airflow can be blown to users more efficiently.

Description

Technical Field

[0001] This application relates to the field of kitchen appliance technology, and in particular to an air supply module and a range hood. Background Technology

[0002] Daily cooking in the kitchen generates a lot of heat, making people feel stuffy and uncomfortable. To improve the user's comfort during cooking, a ventilation module is integrated into the range hood, allowing users to be exposed to a faster airflow while cooking, thus enhancing heat dissipation.

[0003] In related technologies, the air supply module is basically integrated inside the smoke collection hood housing. Due to the limited height and depth of the empty space inside the housing, the diameter of the impeller used in the air duct cannot be increased, resulting in a low overall air volume. At the same time, the distance between the fan outlet and the smoke inlet of the range hood is too close, making it easy for the fan to be sucked in by the range hood, thus interfering with the smoke extraction effect and failing to effectively blow the air to the human body. Utility Model Content

[0004] Therefore, it is necessary to provide an air supply module and range hood that can improve the air supply effect and reduce interference with the extraction of cooking fumes, in order to address the above problems.

[0005] An air supply module is used in a range hood. The range hood includes a range hood module, which includes a range hood housing and a smoke collection hood. The smoke collection hood is connected to the range hood housing. The range hood housing has an installation platform located above the smoke collection hood. The air supply module is located outside the range hood housing and on the installation platform. The air supply module includes a fan housing and a cross-flow impeller. The fan housing has a cross-flow air duct, and the cross-flow impeller is located within the cross-flow air duct.

[0006] In one embodiment, the fan housing has an air inlet communicating with the cross-flow duct, and the air inlet is located on the top shell wall of the fan housing.

[0007] In one embodiment, the air supply module further includes a filter element that is detachably disposed at the air inlet.

[0008] In one embodiment, the fan housing also has an air outlet communicating with the cross-flow duct, and the impeller outer diameter of the cross-flow fan wheel is D1.

[0009] The vertical distance between the rotation axis of the cross-flow impeller and the air inlet is L1, L1≥a·D1, where 0.5<a≤0.7; and / or, the air outlet is located on the front shell wall of the fan casing, and the vertical distance between the rotation axis of the cross-flow impeller and the rear shell wall of the fan casing is L2, L2≥b·D1, where 0.5<b≤0.67.

[0010] In one embodiment, the vertical distance between the rotation axis of the cross-flow impeller and the air inlet is L1, and L1≥0.6·D1; and / or, the vertical distance between the rotation axis of the cross-flow impeller and the rear shell wall of the fan casing is L2, and L2≥0.57·D1.

[0011] In one embodiment, the overall height of the cross-flow duct is H, and 120mm≥H≥c·D1, where 1.1≤c≤1.5; and / or, the overall depth of the cross-flow duct is S, and 145mm≥S≥d·D1, where 1.5≤d≤2.9.

[0012] In one embodiment, the overall height of the cross-flow duct is H, and 120mm ≥ H ≥ 1.3·D1; and / or, the overall depth of the cross-flow duct is S, and 145mm ≥ S ≥ 2.45·D1.

[0013] In one embodiment, the intake angle θ1 of the cross-flow duct ranges from 145° to 195°; and / or, the outlet diffusion angle θ2 of the cross-flow duct ranges from 12° to 25°.

[0014] In one embodiment, the fan housing has a volute tongue, which is used to define a cross-flow duct within the fan housing;

[0015] The length of the exit section of the volute tongue is L, and L≥e·D1, where 0.08≤e≤0.12, or 1.4≤e≤1.6.

[0016] In one embodiment, the range hood module is a European-style range hood module, and the fan housing has an air outlet that connects to the cross-flow duct. The plane where the air outlet is located is flush with the front plane of the range hood module.

[0017] Alternatively, the smoke hood module is a side-smoke smoke hood module and also includes a check valve, with the air supply module located in front of the check valve.

[0018] A range hood includes the air supply module as described above.

[0019] The aforementioned air supply module and range hood utilize a cross-flow impeller, which helps to increase the air supply range. Furthermore, the air supply module is located outside the range hood housing, unrestricted by the size and structure of the internal space. This allows the air supply module to be equipped with a cross-flow impeller with a larger diameter, achieving greater airflow and a wider air delivery range. In addition, the airflow from the air supply module is further away from the range hood module's suction inlet, reducing the mutual interference between the supply and suction airflows. This minimizes interference from the supply airflow on the range hood module's fume extraction and allows the supply airflow to be delivered to the user more efficiently. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a range hood installed in a kitchen according to one embodiment of this application.

[0022] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the air supply module in the range hood.

[0023] Figure 3 This is a schematic diagram of a range hood installed in a kitchen according to another embodiment of this application.

[0024] Explanation of reference numerals in the attached drawings: 100, Range hood; 10, Range hood module; 11, Range hood housing; 111, Mounting platform; 13, Smoke hood; 15, Check valve; 30, Air supply module; 31, Fan housing; 311, Volute; 33, Cross-flow duct; 35, Cross-flow impeller; 37, Air inlet; 39, Air outlet; 200, User. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0026] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and 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, and therefore should not be construed as a limitation of this application.

[0027] Furthermore, where the term "and / or" appears, it merely describes the relationship between related objects and indicates that three relationships can exist. For example, A and / or B can represent the relationship between A and B: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this document generally indicates an "or" relationship between the related objects before and after it. Where the terms "first" and "second" appear, these terms are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature specified with "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, four, five, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0031] Please refer to the following: Figure 1and Figure 2 An embodiment of this application provides a range hood 100, which includes a range hood module 10 and an air supply module 30. The range hood module 10 includes a range hood housing 11 and a smoke collection hood 13. The smoke collection hood 13 is connected to the range hood housing 11, and the range hood housing 11 has a mounting platform 111 located above the smoke collection hood 13.

[0032] The range hood module 10 is used to extract cooking fumes and exhaust them outdoors. The air supply module 30 is used to supply air outwards. The air supply can be used to blow towards the user 200 to enhance heat dissipation for the human body, and it can also drive the indoor air in the kitchen to circulate and reduce the ambient temperature around the user 200.

[0033] Understandably, to achieve its normal function, the range hood module 10 also includes a smoke extraction fan, a smoke exhaust duct, and a smoke inlet. The smoke extraction fan is located inside the range hood housing 11, and the smoke collection hood 13 is connected to the range hood housing 11 and surrounds the smoke inlet. When the range hood 100 is started, suction is generated at the smoke inlet. The fumes are gathered by the smoke collection hood 13, converge towards the smoke inlet, are sucked in, and then discharged through the smoke exhaust duct.

[0034] Specifically, the range hood module 10 can be a European-style range hood module or a side-draft range hood module, etc. Among them, the range hood 100 with a European-style module is a European-style range hood, belonging to the top-draft type. The bottom of the range hood housing 11 forms a downward-facing smoke inlet, above the smoke collection hood 13, and the range hood housing 11 has a recessed mounting platform 111. The range hood 100 with a side-draft module is a side-draft range hood, with the bottom side of the range hood housing 11 inclined to form a smoke inlet, and the top of the range hood housing 11 forming the mounting platform 111.

[0035] An embodiment of this application also provides the above-mentioned air supply module 30, which is disposed outside the range hood housing 11 and located on the mounting platform 111. The air supply module 30 includes a fan housing 31 and a cross-flow impeller 35. The fan housing 31 has a cross-flow duct 33, and the cross-flow impeller 35 is disposed within the cross-flow duct 33.

[0036] The air supply module 30 is used to generate airflow and blow it outward. It is installed as an additional module on the outside of the range hood module 10. Its cross-flow fan 35 is horizontally placed above the smoke collection hood 13, and the two are separated by the range hood housing 11. Specifically, the air supply module 30 is located on the front side of the installation platform 111 near the user 200.

[0037] Understandably, to achieve its normal function, the air supply module 30 also has a drive motor for driving the cross-flow impeller 35 to rotate around its own rotation axis, and the fan housing 31 also has an air inlet 37 and an air outlet 39 connecting the cross-flow duct 33. The fan housing 31 is formed as a volute and has a volute tongue 311 at the air outlet 39 for defining and forming the cross-flow duct 33 within the fan housing 31, so that the cross-flow impeller 35 located in the cross-flow duct 33 can generate cross-flow air under the drive of the drive motor and blow it out from the air outlet 39 to form a supply airflow.

[0038] The aforementioned air supply module 30 employs a cross-flow impeller 35, which helps to increase the air supply range. Furthermore, since the air supply module 30 is located outside the range hood housing 11, it is not limited by the size or structure of the internal space of the housing 11. This allows the air supply module 30 to be equipped with a cross-flow impeller 35 with a larger impeller diameter, achieving greater air volume and a wider air supply range. In addition, the airflow from the air supply module 30 is further away from the smoke inlet of the range hood module 10, reducing the mutual influence between the supply airflow and the smoke inlet, thus minimizing the interference of the supply airflow on the range hood module 10's extraction of cooking fumes, and enabling the supply airflow to be blown more efficiently towards the user 200.

[0039] In some embodiments, the air inlet 37 of the fan housing 31 is located on the top shell wall of the fan housing 31.

[0040] The air supply module 30 is mounted on the installation platform 111 through the bottom shell wall of the fan housing 31, and the top shell wall opposite the bottom shell wall forms the air inlet 37.

[0041] Since the air supply module 30 is set independently of the range hood module 10 and has a separate fan housing 31, there is no need to consider the impact of opening the air inlet 37 at the top on the strength of the range hood housing 11. Therefore, it is not necessary to set the air inlet area on both sides to ensure structural strength, as is the case in related technologies.

[0042] In this way, the air inlet 37 can be set to correspond to the cross-flow fan 35 with a larger area, so that there is enough air intake at both ends and the middle position of the cross-flow fan 35, which helps to increase the air volume of the air supply module 30 and make the air outlet more uniform.

[0043] Furthermore, the air supply module 30 also includes a filter element, which is detachably located at the air inlet 37.

[0044] The filter element is used to filter the air entering the cross-flow duct 33 through the air inlet 37 at the air inlet 37. Specifically, the filter element can be, but is not limited to, oil filter paper.

[0045] In this way, the filter can purify the air entering the air supply module 30, reducing impurities in the air, especially the impact of oil fumes on the normal operation and service life of the air supply module 30. The air inlet 37 is located at the top of the fan housing 31, which facilitates the replacement of the filter and is not interfered with by the structure behind the air supply module 30.

[0046] In some embodiments, the outer diameter of the impeller of the cross-flow fan 35 is D1. The vertical distance between the rotation axis of the cross-flow fan 35 and the air inlet 37 is L1, where L1≥a·D1, and 0.5<a≤0.7.

[0047] Wherein, 'a' can be, but is not limited to, 0.55, 0.57, 0.6, 0.65, 0.67, or 0.7, etc., and is not specifically limited here. The rotation axis of the cross-flow fan 35 can be set horizontally, and the vertical distance between it and the air inlet 37 is the distance between it and the plane where the air inlet 37 is located. The plane where the air inlet 37 is located can be set perpendicular to the horizontal.

[0048] In this way, the distance between the cross-flow fan wheel 35 and the air outlet 39 will not be too far, and the generated airflow can be blown out from the air outlet 39 after being rectified by the cross-flow duct 33, which helps to reduce wind loss.

[0049] In some embodiments, the air outlet 39 of the fan housing 31 is located on the front shell wall of the fan housing 31, and the vertical distance between the rotation axis of the cross-flow impeller 35 and the rear shell wall of the fan housing 31 is L2, and L2≥b·D1, where 0.5<b≤0.67.

[0050] Wherein, b can be, but is not limited to, 0.55, 0.57, 0.6, 0.65 or 0.67, etc., and is not specifically limited here. The front wall of the fan housing 31 is the front facing the user 200, and the air outlet 39 is located here to facilitate air delivery to the user 200.

[0051] Thus, after the air inlet 37 enters the cross-flow duct 33, it can be quickly driven by the cross-flow impeller 35 and flow towards the air outlet 39. In particular, since the air inlet 37 is located at the top of the fan casing 31, controlling the distance between the rear casing wall and the cross-flow impeller 35 helps to shorten the airflow path, so that the airflow flowing in from the top can be driven by the cross-flow impeller 35 as quickly as possible.

[0052] Specifically, L1≥0.6·D1, i.e. a is 0.6; and / or, L2≥0.57·D1, i.e. b is 0.57.

[0053] Thus, based on the relationship between L1, L2 and D1, the maximum size of the fan casing 31 can be determined according to the installation conditions, and the sizes of L1 and L2 can be determined according to the maximum size, thereby selecting a cross-flow impeller 35 with a suitable diameter to increase the air volume.

[0054] In some embodiments, the overall height of the cross-flow duct 33 is H, and 120mm≥H≥c·D1, where 1.1≤c≤1.5.

[0055] Where c can be, but is not limited to, 1.1, 1.2, 1.3, 1.4 or 1.5, etc., and is not specifically limited here.

[0056] In some embodiments, the overall depth of the cross-flow duct 33 is S, and 145mm≥S≥d·D1, where 1.5≤d≤2.9.

[0057] Wherein, d can be, but is not limited to, 1.5, 1.85, 2, 2.15, 2.3, 2.45, 2.6, 2.75 or 2.9, etc., and is not specifically limited here.

[0058] Thus, by taking into account the relationship between the overall height of the cross-flow duct 33, the overall depth of the cross-flow duct 33 and the diameter of the cross-flow impeller 35, a suitable design can be made to make the air delivery smoother and the air volume and speed better.

[0059] Specifically, 120mm≥H≥1.3·D1, i.e., c is 1.3; and / or, 145mm≥S≥2.45·D1, i.e., d is 2.45.

[0060] Thus, based on the relationship between L1, L2, H, S and D1, the maximum size of the fan casing 31 can be determined according to the installation conditions, and a suitable cross-flow duct 33 can be designed, thereby selecting a cross-flow impeller 35 with a suitable diameter to increase the air volume.

[0061] In some embodiments, other components, such as flow guiding structures and filter structures, may be installed in the cross-flow duct 33 near the air outlet 39. In other embodiments, no other components need to be installed in the cross-flow duct 33 near the air outlet 39, thus the depth of the cross-flow duct 33 is smaller, 110mm≥S≥d·D1, or 90mm≥S≥d·D1.

[0062] In some embodiments, the intake angle θ1 of the cross-flow duct 33 ranges from 145° to 195°; and / or, the outlet diffusion angle θ2 of the cross-flow duct 33 ranges from 12° to 25°.

[0063] Thus, the airflow profile of the cross-flow duct 33 is more reasonable, and the airflow duct designed within this range can ensure lower noise levels.

[0064] In some embodiments, the length of the outlet section of the volute tongue 311 is L, and L≥e·D1, where 0.08≤e≤0.12. Here, e can be, but is not limited to, 0.08, 0.09, 0.1, 0.11, or 0.12. Specifically, e is 0.1.

[0065] Thus, within this range, the volute tongue 311 can effectively prevent gas circulation and perform reasonable rectification and transportation of the airflow.

[0066] In another embodiment, the length of the exit section of the volute tongue 311 is L, and L≥e·D1, where 1.4≤e≤1.6. Here, e can be, but is not limited to, 1.4, 1.45, 1.5, 1.55, or 1.6. Specifically, e is 0.1.

[0067] Thus, the outlet section is longer, and other components, such as flow guiding structures and filter structures, can be installed here, without specific limitations.

[0068] In some embodiments, the range hood module 10 is a European-style range hood module, and the plane where the air outlet 39 is located is flush with the front plane of the range hood module 10. The front plane of the range hood module 10 is the front of the range hood module 10 facing the user 200.

[0069] In this way, the plane where the air outlet 39 is located is flush with it, which makes it easy for the airflow at the air outlet to blow directly towards the user 200 in a predetermined direction, preventing the airflow from rising.

[0070] Please refer to the following: Figure 3 In another embodiment, the smoke hood module 10 is a side-smoke smoke hood module and also includes a check valve 15, with the air supply module 30 located in front of the check valve 15.

[0071] Thus, positioning the air supply module 30 in front of the check valve 15 ensures that its air outlet 39 is not obstructed by the check valve 15 and provides maximum installation space. Simultaneously, the air outlet 39 of the air supply module 30 can be positioned close to the front edge of the mounting platform 111.

[0072] As described in the background technology, if the impeller is placed inside the range hood using the solution in the related technology, the impeller diameter will be limited to 40mm. At a speed of 2500rpm, the air volume is low and the air delivery distance is not far enough to generate a high-speed airflow of more than 2m / s around the human head. Moreover, some of the air is sucked away by the range hood after it is discharged, so it does not achieve a cooling effect. If the motor speed needs to be further increased in order to increase the air speed, the noise level will be greatly increased.

[0073] In order to increase air volume while reducing the mutual interference between the supply airflow and the smoke extraction airflow, the air supply module 30 of the aforementioned range hood 100 is located on the upper outer side of the range hood housing where the smoke collection hood 13 is located. The air inlet 37 of the air supply module 30 is not affected by the top plate structure of the range hood housing 11 and can be directly arranged above the cross-flow duct 33, and is consistent in the axial direction. The location of the air inlet 37 above the cross-flow duct 33 helps to improve the air intake quality and also facilitates the reduction of interference from the check valve 15 of the side smoke hood module 10, so as to facilitate the replacement of the filter. Furthermore, the impeller diameter D1 of the cross-flow fan 35 can be selected as 50mm. The vertical distance between the rotation axis of the cross-flow fan 35 and the air inlet 37 is L1, and L1≥0.6·D1. The horizontal distance from the rear casing wall of the fan is L2≥0.57·D1. The overall height of the cross-flow duct 33 is 120mm≥H≥1.3·D1, and the overall depth is 145mm≥S≥2.45·D1. The air intake angle θ1 of the duct profile of the cross-flow duct 33 is in the range of 145°-195°, the outlet diffusion angle θ2 is between 12-25°, and the length of the outlet section on one side of the volute tongue 311 is L, and L≥0.1·D1. The duct designed within this range can ensure that the air velocity at the outlet 39 reaches more than 4m / s under low noise conditions. In addition, the air supply module 30 can adapt to the installation space limitations of different platform smoke hood modules 10, achieving a universal effect.

[0074] In summary, the range hood 100 includes both European and side-suction types. Its air supply module 30 is located outside the range hood module 10, and above the housing containing the smoke collection hood 13, closer to the user 200. This further distances it from the range hood's smoke inlet, reducing the mutual interference between the fan's exhaust and the range hood's intake airflow. The air inlet 37 of the air supply module 30 is located above the cross-flow duct 33, facilitating filter replacement. When the range hood module 10 of the range hood 100 is a side-suction module, due to the interference of the check valve 15, the front end space of the installation platform 111 is insufficient. Therefore, the cross-flow duct 33 needs to be designed to its limits. The vertical distance between the rotation axis of the cross-flow impeller 35 and the air inlet 37 is L1, where L1 ≥ 0.6D1. The vertical distance between the rotation axis of the cross-flow impeller 35 and the rear wall of the fan housing 31 is L2, where L2 ≥ 0.57·D1. The overall height of the cross-flow duct 33 is H, and 120mm ≥ H ≥ 1.3·D1. The overall depth of the cross-flow duct 33 is S, and 145mm ≥ S ≥ 2.45·D1. The air intake angle θ1 of the duct profile ranges from 145° to 195°, and the outlet diffusion angle θ2 is between 12° and 25°. The length L of the outlet section on one side of the volute tongue 311 is ≥ 0.1·D1. The duct designed within this range can ensure that the airflow velocity v ≥ 4m / s without noise accumulation. Thus, the cross-flow duct 33 can achieve a good blowing effect within a limited depth and height range, and can be installed and used on different range hood modules 10. In a specific embodiment, the impeller diameter of the cross-flow fan 35 is 50mm. At a rotation speed of 2100rpm, the airflow velocity reaching the human body reaches more than 3m / s, which can achieve a significant blowing and cooling effect.

[0075] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A ventilation module for a range hood, the range hood comprising a range hood module (10), the range hood module (10) comprising a range hood housing (11) and a smoke collection hood (13), the smoke collection hood (13) being connected to the range hood housing (11), the range hood housing (11) having a mounting platform (111) located above the smoke collection hood (13), characterized in that, The air supply module is located outside the smoke machine housing (11) and on the installation platform (111); the air supply module includes a fan housing (31) and a cross-flow impeller (35), the fan housing (31) has a cross-flow air duct (33) inside, and the cross-flow impeller (35) is located inside the cross-flow air duct (33).

2. The air supply module according to claim 1, characterized in that, The fan housing (31) has an air inlet (37) that connects to the cross-flow duct (33), and the air inlet (37) is located on the top shell wall of the fan housing (31).

3. The air supply module according to claim 2, characterized in that, The air supply module also includes a filter element, which is detachably disposed at the air inlet (37).

4. The air supply module according to claim 2, characterized in that, The fan casing (31) also has an air outlet (39) that connects to the cross-flow duct (33), and the impeller outer diameter of the cross-flow fan wheel (35) is D1. The vertical distance between the rotation axis of the cross-flow impeller (35) and the air inlet (37) is L1, L1≥a·D1, where 0.5<a≤0.7; and / or, the air outlet (39) is located on the front shell wall of the fan housing (31), and the vertical distance between the rotation axis of the cross-flow impeller (35) and the rear shell wall of the fan housing (31) is L2, where L2≥b·D1, where 0.5<b≤0.

67.

5. The air supply module according to claim 4, characterized in that, The vertical distance between the rotation axis of the cross-flow impeller (35) and the air inlet (37) is L1, and L1≥0.6·D1; and / or, the vertical distance between the rotation axis of the cross-flow impeller (35) and the rear shell wall of the fan casing (31) is L2, and L2≥0.57·D1.

6. The air supply module according to claim 4, characterized in that, The overall height of the cross-flow duct (33) is H, and 120mm≥H≥c·D1, where 1.1≤c≤1.5; and / or, the overall depth of the cross-flow duct (33) is S, and 145mm≥S≥d·D1, where 1.5≤d≤2.

9.

7. The air supply module according to claim 4, characterized in that, The overall height of the cross-flow duct (33) is H, and 120mm ≥ H ≥ 1.3·D1; and / or, the overall depth of the cross-flow duct (33) is S, and 145mm ≥ S ≥ 2.45·D1.

8. The air supply module according to claim 7, characterized in that, The intake angle θ1 of the cross-flow duct (33) ranges from 145° to 195°; and / or the outlet diffusion angle θ2 of the cross-flow duct (33) ranges from 12° to 25°.

9. The air supply module according to claim 8, characterized in that, The fan housing (31) has a volute tongue (311) for defining a cross-flow duct (33) within the fan housing (31). The length of the exit section of the volute tongue (311) is L, and L≥e·D1; where 0.08≤e≤0.12, or 1.4≤e≤1.

6.

10. The air supply module according to any one of claims 1-9, characterized in that, The range hood module (10) is a European-style range hood module. The fan housing (31) has an air outlet (39) that connects to the cross-flow duct (33). The plane where the air outlet (39) is located is flush with the front plane of the range hood module (10). Alternatively, the smoke hood module (10) is a side-smoke smoke hood module and also includes a check valve (15), with the air supply module located in front of the check valve (15).

11. A range hood, characterized in that, Includes the air supply module as described in any one of claims 1-10.

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