Range hood

Abstract

The utility model discloses a range hood which comprises a fan assembly and a smoke pipe, and at least part of the fan assembly is used for being installed above a suspended ceiling; the draught fan assembly comprises a draught fan box and a draught fan at least partially arranged in the draught fan box. The draught fan comprises a volute and an impeller. The fan box comprises a top wall and a side wall, the side wall is used for defining a smoke inlet of the fan box, or the fan box comprises the top wall, a bottom wall and the side wall, and the smoke inlet of the fan box is formed in the bottom wall or the bottom wall is folded downwards to form the smoke inlet of the fan box; the smoke pipe comprises a smoke inlet section and a smoke outlet section which are communicated with each other, the smoke outlet section is directly connected with the side wall of the fan box, and the smoke outlet section directly covers at least part of the side wall of the fan box or at least part of the side wall of the fan box directly covers the smoke outlet section. According to the range hood provided by the embodiment of the invention, an air inlet cover does not need to be arranged between the smoke pipe and the fan assembly, the structure can be optimized, the cost is reduced, the installation is simplified, and the reliability is 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] Range hoods have become an indispensable kitchen appliance in modern homes. Their main function is to remove cooking fumes, thus maintaining a pleasant kitchen environment.

[0003] Common integrated range hoods have the following main drawbacks: the fan inevitably generates significant noise as it moves the fumes, resulting in a poor user experience while cooking. To overcome these issues, a split-type range hood has been proposed, achieving a certain degree of noise reduction.

[0004] However, there is still room for improvement in areas such as cost reduction for current split-type range hoods. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the present invention provides a range hood that eliminates the need for an air inlet hood between the flue and the fan assembly, thereby optimizing the structure, reducing costs, simplifying installation, and improving reliability.

[0006] The specific technical solution of this utility model embodiment is as follows:

[0007] A range hood includes a fan assembly and a smoke duct, at least a portion of the fan assembly being mounted above a suspended ceiling; the fan assembly includes a fan housing and a fan at least partially disposed within the fan housing, the fan including a volute and an impeller disposed within the volute; the fan housing includes a top wall and a side wall connected to the top wall, the side wall forming a smoke inlet for the fan housing, or the fan housing includes a top wall, a bottom wall, and side walls connected to both the top and bottom walls. The bottom wall is provided with the smoke inlet of the fan box, or the bottom wall is folded down to form the smoke inlet of the fan box; the smoke pipe includes a connected smoke inlet section and a smoke outlet section, the smoke inlet section is used to allow smoke to flow into the smoke pipe, the smoke outlet section of the smoke pipe is directly connected to the side wall of the fan box, and the smoke outlet section of the smoke pipe directly covers at least part of the side wall of the fan box, or at least part of the side wall of the fan box directly covers the smoke outlet section of the smoke pipe.

[0008] In a preferred embodiment, the flue is of unequal length in the left-right direction, the length of the flue gas outlet section is greater than the length of the flue gas inlet section, and / or, the flue is of unequal width in the front-back direction, the width of the flue gas outlet section is greater than the width of the flue gas inlet section; or, the sidewall of the fan box projects onto the horizontal plane in a rectangular or rectangular shape, and the cross-section of the flue is rectangular or rectangular.

[0009] In a preferred embodiment, the flue gas outlet section includes an expansion section; the expansion section includes a horizontally arranged horizontal section and a vertically arranged vertical section connected to the horizontal section, or the expansion section includes an upwardly inclined section and a vertically arranged vertical section connected to the inclined section.

[0010] In a preferred embodiment, the horizontal segment is formed by the horizontal extension of the wall of the flue, and the vertical segment is formed by the vertical extension of the wall of the flue from the horizontal segment upwards; or, the inclined segment is formed by the upward inclined extension of the wall of the flue, and the vertical segment is formed by the vertical extension of the wall of the flue from the highest point of the inclined segment upwards.

[0011] In a preferred embodiment, at least the vertical section is used to be directly connected to the side wall of the fan box; at least a portion of the vertical section is used to directly cover at least a portion of the side wall of the fan box, or at least a portion of the side wall of the fan box is used to directly cover at least a portion of the vertical section.

[0012] In a preferred embodiment, the flue further includes a connecting section located between the flue gas inlet section and the flue gas outlet section, wherein the connecting section and the flue gas inlet section have the same or substantially the same length in the left-right direction and / or width in the front-back direction.

[0013] In a preferred embodiment, at least the flue gas outlet section is located above the suspended ceiling.

[0014] In a preferred embodiment, the volute has a protrusion that extends downward over the side wall of the fan housing, and the flue gas outlet section is used to cover the protrusion.

[0015] In a preferred embodiment, at least the flue gas outlet section includes a double-layer flue pipe section, which includes an outer pipe section and an inner pipe section. A noise reduction device is provided between the outer pipe section and the inner pipe section. The inner pipe section is provided with a silencing hole or is completely enclosed. Alternatively, the flue gas outlet section includes a single-layer flue pipe section, and the flue pipe also includes a connecting section. The connecting section and / or the flue gas inlet section includes a double-layer flue pipe section, which includes an outer pipe section and an inner pipe section. A noise reduction device is provided between the outer pipe section and the inner pipe section. The inner pipe section is provided with a silencing hole or is completely enclosed.

[0016] In a preferred embodiment, the smoke pipe is a rigid smoke pipe or a flexible smoke pipe, the smoke pipe is an integrally formed structure, the smoke pipe is a double-layer smoke pipe, the double-layer smoke pipe includes an outer layer pipe and an inner layer pipe, a noise reduction device is provided between the outer layer pipe and the inner layer pipe, and the inner layer pipe is provided with a sound-absorbing hole or the inner layer pipe is completely sealed.

[0017] In a preferred embodiment, the range hood further includes a lower cavity, and the fan assembly, the flue pipe, and the lower cavity are arranged sequentially from top to bottom.

[0018] In a preferred embodiment, the fan housing is made of plastic.

[0019] The technical solution of this utility model has the following significant beneficial effects:

[0020] In this embodiment, compared to the embodiment with an air inlet hood, the fan box and the flue pipe are directly connected, eliminating the need for the air inlet hood. Eliminating the air inlet hood not only reduces the cost of the range hood but also eliminates the steps of installing the hood, connecting it to the upper fan box, and connecting it to the lower flue pipe, thus simplifying installation. Furthermore, by removing the air inlet hood, the locations where it would normally connect to the upper fan box and the lower flue pipe are also eliminated, reducing areas prone to oil seepage and improving the reliability of the range hood.

[0021] Furthermore, when the flue pipe is directly connected to the fan box, the bottom wall of the fan box can be omitted, thus eliminating the need for (bending or welding) to create a bottom wall for the fan box. This not only saves on the cost of the range hood but also simplifies the manufacturing process and avoids the risk of oil leakage at the welded joints. In addition, since the fan box is typically a high-cost and heavy sheet metal component, while the flue pipe is usually a low-cost and lightweight plastic component, omitting the bottom wall or the reduced-diameter structure below the bottom wall of the fan box is equivalent to extending the flue pipe upwards, replacing the structure omitted from the fan box. This further reduces the cost and weight of the range hood and facilitates the installation of the fan assembly above the ceiling.

[0022] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, embodiments of the present invention include many changes, modifications, and equivalents. Features described and / or shown for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. Attached Figure Description

[0023] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0024] Figure 1 This is a schematic diagram of the structure of a range hood provided in the embodiments of this application;

[0025] Figure 2 for Figure 1 A partial cross-sectional view of a range hood provided in the embodiments of this application;

[0026] Figure 3 for Figure 2 A partial cross-sectional view of another range hood provided in the embodiments of this application;

[0027] Figure 4 This is a schematic diagram of the structure of the flue pipe of a range hood provided in the embodiments of this application.

[0028] Reference numerals in the figures of this application:

[0029] 1. Fan box;

[0030] 11. Top wall;

[0031] 12. Side walls;

[0032] 121. Smoke inlet;

[0033] 100. Fan;

[0034] 110. Snail shell;

[0035] 111. Protrusion;

[0036] 3. Smoke pipe;

[0037] 210. Flue gas inlet section;

[0038] 220. Flue gas outlet section;

[0039] 230. Connected segment;

[0040] 31. Expansion section; 311. Inclined section; 312. Vertical section;

[0041] 4. Lower cavity;

[0042] X, left and right directions;

[0043] Y, forward / backward direction;

[0044] Z, altitude direction. Detailed Implementation

[0045] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate this utility model and are not intended to limit the scope of this utility model. After reading this utility model, any modifications of this utility model in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0046] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] This utility model provides a range hood that eliminates the need for an air inlet hood between the flue and the fan assembly, thereby optimizing the structure, reducing costs, simplifying installation, and improving reliability.

[0049] Please refer to the following for comprehensive information. Figures 1 to 3This application specification provides a range hood, which may include: a fan assembly and a smoke duct 3. At least a portion of the fan assembly is used for installation above a suspended ceiling. The fan assembly includes a fan housing 1 and a fan 100 at least partially disposed within the fan housing 1. The fan 100 includes a volute 110 and an impeller disposed within the volute 110. The fan housing 1 includes a top wall 11 and a side wall 12 connected to the top wall 11. The side wall 12 is used to enclose a smoke inlet 121 of the fan housing 1. Alternatively, the fan housing 1 includes a top wall 11. 1. A bottom wall and a side wall 12 connected to both the top wall 11 and the bottom wall. The bottom wall is provided with a smoke inlet 121 for the fan box 1, or the bottom wall is folded downwards to form the smoke inlet 121 for the fan box 1. The flue pipe 3 includes a flue gas inlet section 210 and a flue gas outlet section 220 that are connected to each other. The flue gas inlet section 210 is used to allow flue gas to flow into the flue pipe 3. The flue gas outlet section 220 of the flue pipe 3 is directly connected to the side wall 12 of the fan box 1. The flue gas outlet section 220 of the flue pipe 3 directly covers at least a portion of the side wall 12 of the fan box 1 (e.g., ...). Figure 2 (as shown) or at least a portion of the sidewall 12 of the fan box 1 directly covers the flue gas outlet section 220 of the flue pipe 3 (e.g. Figure 3 (As shown).

[0050] In this embodiment, the range hood mainly includes a fan assembly and a flue 3. The fan assembly may include a fan housing 1 and a fan 100 at least partially disposed within the fan housing 1. The fan 100 may include a volute 110 and an impeller disposed within the volute 110. The volute 110 has an inlet and an outlet. The fan housing 1 may include a top wall 11 and a side wall 12 connected to the top wall 11. The side wall 12 forms the smoke inlet 121 of the fan housing 1, thus eliminating the need for a bottom wall. Eliminating the bottom wall of the fan housing 1 avoids the need for bending or welding to create a bottom wall, saving on the cost of the range hood, simplifying the manufacturing process, and avoiding the risk of oil leakage at welded joints. Furthermore, since the fan box 1 is typically a high-cost and heavy sheet metal component, while the flue 3 is typically a low-cost and lightweight plastic component, when the fan box 1 omits its bottom wall or the reduced-diameter structure below the bottom wall, it is equivalent to the flue 3 extending upwards, replacing the omitted structure of the fan box 1. This can further reduce the cost and weight of the range hood, while also facilitating the installation of the fan assembly above the ceiling. Of course, in this application, it is not excluded that the smoke inlet 121 is formed directly on the bottom wall of the fan box 1 or formed by folding the bottom wall of the fan box 1 downwards. A smoke outlet can be provided on the side wall 12 of the fan box 1. The smoke inlet 121 of the fan box 1 and the inlet of the volute 110 have the same orientation, for example, both can be set downwards. The smoke outlet of the fan box 1 and the outlet of the volute 110 have the same orientation, for example, both can be directed towards the side wall.

[0051] Please refer to the following: Figure 4 The flue pipe 3 may include a connected flue gas inlet section 210 and a flue gas outlet section 220. The flue gas inlet section 210 allows flue gas to flow into the flue pipe 3, and the flue gas outlet section 220 of the flue pipe 3 is directly connected to the side wall 12 of the fan box 1. When the flue gas outlet section 220 of the flue pipe 3 directly covers at least a portion of the side wall 12 of the fan box 1, or when at least a portion of the side wall 12 of the fan box 1 directly covers the flue gas outlet section 220 of the flue pipe 3, the connection between the two can be completed using the overlapping section of the flue gas outlet section 220 and the side wall 12 of the fan box 1. In particular, when the flue gas outlet section 220 of the flue pipe 3 directly covers at least a portion of the side wall 12 of the fan box 1, oil leakage from the mating point of the flue pipe 3 and the fan box 1 can also be prevented. The flue pipe 3 and the fan box 1 cooperate to form a flue gas guiding channel. When the fan 100 is started, it can draw the cooking fumes into the smoke duct and then discharge them into a designated location, such as a public smoke duct.

[0052] In this embodiment, compared to the embodiment with an air inlet hood, the fan housing 1 and the flue 3 are directly connected, eliminating the need for the air inlet hood. Eliminating the air inlet hood not only reduces the cost of the range hood but also eliminates the steps of installing the hood, connecting it to the upper fan housing 1, and connecting it to the lower flue 3, thus simplifying installation. Furthermore, by removing the air inlet hood, the positions where it would normally connect to the upper fan housing 1 and the lower flue 3 are also eliminated, reducing areas prone to oil seepage and improving the reliability of the range hood.

[0053] Furthermore, when the flue duct 3 is directly connected to the fan box 1, the bottom wall of the fan box 1 can be omitted, thus eliminating the need for (bending or welding) to create a bottom wall on the fan box 1. This not only saves on the cost of the range hood but also simplifies the manufacturing process and avoids the risk of oil leakage at the welded joints. In addition, since the fan box 1 is typically a high-cost and heavy sheet metal component, while the flue duct 3 is typically a low-cost and lightweight plastic component, omitting the bottom wall or the reduced-diameter structure below the bottom wall of the fan box 1 is equivalent to extending the flue duct 3 upwards, replacing the omitted structure of the fan box 1. This further reduces the cost and weight of the range hood and facilitates the installation of the fan assembly above the ceiling.

[0054] In one embodiment, the flue pipe 3 is a flue pipe 3 of unequal length in the left-right direction X, the length of the flue gas outlet section 220 is greater than the length of the flue gas inlet section 210, and / or, the flue pipe 3 is a flue pipe 3 of unequal width in the front-back direction Y, the width of the flue gas outlet section 220 is greater than the width of the flue gas inlet section 210; or, the projection of the side wall 12 of the fan box 1 on the horizontal plane is rectangular or quasi-rectangular, and the cross-section of the flue pipe 3 is rectangular or quasi-rectangular.

[0055] In this embodiment, to avoid altering the existing dimensions of the fan housing 1 and to minimize modifications to the flue duct 3, the dimensions of the flue gas outlet section 220 of the flue duct 3, which mates with the side wall 12 of the fan housing 1, can be adapted to the dimensions of the side wall 12 of the fan housing 1. The dimensions of other parts of the flue duct 3 (including the flue gas inlet section 210) can remain unchanged, thereby avoiding interference with existing installation environments such as cabinets or affecting aesthetics. Thus, the cross-sectional dimension of the flue gas outlet section 220 is larger than that of the flue gas inlet section 210. Specifically, the length of the flue gas outlet section 220 can be increased in the left-right direction (X), and / or the width of the flue gas outlet section 220 can be increased in the front-back direction (Y), meaning the length of the flue gas outlet section 220 can be greater than the length of the flue gas inlet section 210 and / or the width of the flue gas outlet section 220 can be greater than the width of the flue gas inlet section 210.

[0056] Generally, the projection of the side wall 12 of the fan box 1 on the horizontal plane is rectangular or rectangular, and the cross-section of the flue 3 can also be rectangular or rectangular. By using a flue 3 that matches the cross-sectional profile of the side wall 12 of the fan box 1, it is easy for the flue 3 to be connected to the fan box 1.

[0057] like Figure 4 As shown, in one embodiment, the flue gas outlet section 220 includes an expansion section 31; the expansion section 31 includes a horizontally arranged horizontal section and a vertically arranged vertical section 312 connected to the horizontal section, or the expansion section 31 includes an upwardly inclined section 311 and a vertically arranged vertical section 312 connected to the inclined section 311.

[0058] In this embodiment, the specific structure of the expansion section 31 can be referred to the structure of the smoke hood.

[0059] The expansion section 31 may include a generally horizontally arranged horizontal section and a generally vertically arranged vertical section 312. The horizontal section may be annular, and its outer contour dimensions may match those of the vertical section 312. The outer contour dimensions of the vertical section 312 may be larger than those of the flue gas inlet section 210. The horizontal section may be formed by the horizontal extension of the wall of the flue pipe 3, and the vertical section 312 may be formed by the vertical extension of the wall of the flue pipe 3 upwards from the horizontal section.

[0060] Alternatively, the expansion section 31 may include an inclined section 311 and a generally vertical section 312. Specifically, the inclined section 311 may be a pipe segment with a gradually increasing cross-sectional area from top to bottom. The cross-sectional dimension of the uppermost end of the inclined section 311 may be the same as the cross-sectional dimension of the vertical section 312. The outer contour dimension of the vertical section 312 may be larger than the outer contour dimension of the flue gas inlet section 210. The inclined section 311 may be formed by the upward inclined extension of the pipe wall of the flue pipe 3, and the vertical section 312 may be formed by the vertical upward extension of the pipe wall of the flue pipe 3 from the highest point of the inclined section 311.

[0061] Of course, the specific structure and formation of the expansion segment 31 can also take other forms, and are not limited to the above description. Those skilled in the art may make other changes under the guidance of the technical essence of this application, but as long as the function and effect achieved are the same as or similar to this application, they should be covered within the scope of protection of this application.

[0062] In one embodiment, at least the vertical section 312 is used to be directly connected to the side wall 12 of the fan box 1; at least a portion of the vertical section 312 is used to directly cover at least a portion of the side wall 12 of the fan box 1 or at least a portion of the side wall 12 of the fan box 1 is used to directly cover the at least a portion of the vertical section 312.

[0063] In this embodiment, the vertical section 312 of the expansion section 31 is used to connect with the side wall 12 of the fan housing 1, and the size of the vertical section 312 can be adapted to the side wall 12 of the fan housing 1. For example, as Figure 2 As shown, when at least a portion of the vertical section 312 directly covers at least a portion of the side wall 12 of the fan box 1, the inner contour dimension of the vertical section 312 can be the same as or close to the outer contour dimension of the side wall 12 of the fan box 1.

[0064] Or, such as Figure 3 As shown, at least part of the side wall 12 of the fan box 1 can directly cover at least part of the vertical section 312. At this time, the inner contour dimension of the side wall 12 of the fan box 1 can be the same as or close to the outer contour dimension of the vertical section 312.

[0065] In a preferred embodiment, the flue pipe 3 further includes a connecting section 230, which is located between the flue gas inlet section 210 and the flue gas outlet section 220. The length of the connecting section 230 and the flue gas inlet section 210 in the left-right direction X and / or the width in the front-back direction Y are the same or substantially the same.

[0066] In this embodiment, the flue pipe 3 may include a flue gas inlet section 210, a connecting section 230, and a flue gas outlet section 220 from top to bottom. The connecting section 230 guides the flue gas introduced from the flue gas inlet section 210 to the flue gas outlet section 220. The shape, structure, and size of the connecting section 230 may be the same as or nearly the same as those of the flue gas inlet section 210. Specifically, the connecting section 230 may be a double-layered pipe or a single-layered pipe. The connecting section 230 may be a smooth-surfaced pipe or a corrugated pipe, etc. Typically, the flue gas inlet section 210 may be a section of pipe used to mate with a lower component (e.g., the lower cavity 4). For example, when the connecting section 230 is a corrugated pipe section, the length of the connecting section 230 and the flue gas inlet section 210 in the left-right direction X and / or the width in the front-back direction Y are substantially the same. Specifically, the projection of the connecting section 230 toward the flue gas inlet section 210 may cover the flue gas inlet section 210.

[0067] In one embodiment, at least the flue gas outlet section 220 is located above the suspended ceiling.

[0068] In this embodiment, when the flue gas outlet section 220 is located above the ceiling, compared to when the flue gas outlet section 220 is below the ceiling, it is equivalent to the upper part of the flue pipe 3 and the fan 100 being moved further upward. This can raise the installation position of the fan 100, making the fan 100 further away from the user's installation, thereby reducing noise. In addition, when the flue gas outlet section 220 is located above the ceiling, compared to when the flue gas outlet section 220 is below the ceiling and connected to the fan box, the height of the side wall 12 of the fan box 1 can be reduced, saving sheet metal and thus reducing costs.

[0069] In one embodiment, the volute 110 has a protrusion 111 that protrudes downward from the side wall 12 of the fan housing 1, and the flue gas outlet section 220 is used to cover the protrusion 111.

[0070] In this embodiment, when the volute 110 has a protrusion 111 that protrudes downward from the side wall 12 of the fan box 1, the flue gas outlet section 220 can be used to cooperate with the fan box 1 to cover the protrusion 111, thereby reducing noise while reducing the height of the side wall 12 of the fan box 1, saving sheet metal, and thus reducing costs.

[0071] In one embodiment, at least the flue gas outlet section 220 includes a double-layer flue pipe section, which includes an outer pipe section and an inner pipe section. A noise reduction device is provided between the outer pipe section and the inner pipe section. The inner pipe section is provided with a silencing hole or is completely enclosed. Alternatively, the flue gas outlet section 220 includes a single-layer flue pipe section. The flue pipe 3 also includes a connecting section 230. The connecting section 230 and / or the flue gas inlet section 210 include a double-layer flue pipe section, which includes an outer pipe section and an inner pipe section. A noise reduction device is provided between the outer pipe section and the inner pipe section. The inner pipe section is provided with a silencing hole or is completely enclosed.

[0072] In this embodiment, the flue gas outlet section 220 is the part that is covered around the fan 100.

[0073] When at least the flue gas outlet section 220 is a double-layer flue pipe section, the noise generated by the fan 100 can be isolated by the double-layer flue pipe section, that is, the noise source can be isolated, thereby achieving a good noise reduction effect. At the same time, the flue pipe 3 located below the flue gas outlet section 220 can be made into a double layer or a single layer. When it is made into a double layer, the noise reduction effect on the flow channel can be further guaranteed, while a single layer can reduce the cost of the flue pipe 3.

[0074] Specifically, the double-layered flue 3 may include: an inner pipe section and an outer pipe section surrounding the inner pipe section, as well as a noise reduction device disposed between the outer and inner pipe sections. The inner pipe section may have silencing holes, allowing noise to enter the space between the outer and inner pipe sections and be reduced by the noise reduction device. Specifically, the noise reduction device may be a porous sound-absorbing medium, such as sound-absorbing cotton. Alternatively, the inner pipe section may be a fully enclosed structure, in which case the noise reduction device may be sound-insulating cotton.

[0075] Alternatively, the flue gas outlet section 220 can be a single-layer flue pipe section, and the connecting section 230 and the flue gas inlet section 210 below the flue gas outlet section 220 can be at least partially provided with double-layer flue pipe sections, thereby reducing the noise generated when the fan 100 is working. In addition, since the flue gas outlet section 220 can be a single-layer flue pipe section, it is more flexible and easier to connect to the fan box 1 compared to a double-layer flue pipe section.

[0076] The specific structure of the double-layer flue section can be referred to the specific description of the above-mentioned implementation method of at least flue gas outlet section 220 including double-layer flue section, which will not be repeated here.

[0077] In one embodiment, the smoke pipe 3 is a rigid smoke pipe or a flexible smoke pipe, the smoke pipe 3 is an integrally formed structure, the smoke pipe 3 is a double-layer smoke pipe, the double-layer smoke pipe includes an outer layer pipe and an inner layer pipe, a noise reduction device is provided between the outer layer pipe and the inner layer pipe, the inner layer pipe is provided with a sound-absorbing hole or the inner layer pipe is completely sealed.

[0078] In this embodiment, the flue 3 can be a rigid flue or a flexible flue. When the flue 3 is a flexible flue, it can be deformed according to actual installation requirements, thereby improving the adaptability of the range hood installation and reducing the precision requirements of the installation.

[0079] The smoke pipe 3 can be a single-piece molded double-layer smoke pipe. The double-layer smoke pipe may include an inner pipe, an outer pipe sleeved outside the inner pipe, and a noise reduction device disposed between the outer pipe and the inner pipe.

[0080] The inner tube may have sound-absorbing holes. When these holes are present, noise can enter the space between the outer and inner tubes and be reduced by the noise reduction device. Specifically, the noise reduction device can be a porous sound-absorbing medium, such as sound-absorbing cotton. Alternatively, the inner tube can be a fully enclosed structure, in which case the noise reduction device can be sound-insulating cotton.

[0081] In one embodiment, the range hood further includes a lower cavity 4, and the fan assembly, the flue 3, and the lower cavity 4 are arranged sequentially from top to bottom.

[0082] In this embodiment, the range hood may further include a lower cavity 4. The lower cavity 4 is positioned relatively close to the user's cooking area and is used to collect the cooking fumes generated during cooking. In the vertical direction Z, the fan assembly, the flue 3, and the lower cavity 4 are arranged sequentially from top to bottom. Along the direction of smoke flow, the lower cavity 4, the flue 3, and the fan assembly are arranged sequentially.

[0083] In one embodiment, the fan housing 1 is made of plastic.

[0084] In this embodiment, when the fan housing 1 is made of plastic, it is lighter and cheaper than traditional sheet metal, and easier to install above the ceiling. In some embodiments, the fan housing 1 can be formed by blow molding. The fan housing 1 manufactured by blow molding is a one-piece structure, eliminating the need for screws to connect the various parts of the fan housing 1, thus resulting in higher reliability.

[0085] It should be noted that in the description of this application, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more.

[0086] The various embodiments described in this specification are presented in a progressive manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0087] The above are merely a few embodiments of this utility model. Although the embodiments disclosed in this utility model are as described above, the content is only for the purpose of facilitating understanding of this utility model and is not intended to limit this utility model. Any person skilled in the art to which this utility model pertains may make any modifications and changes in the form and details of the embodiments without departing from the spirit and scope disclosed in this utility model. However, the patent protection scope of this utility model shall still be determined by the scope defined in the appended claims.

Claims

1. A range hood, characterized in that, The range hood includes a fan assembly and a flue, with at least a portion of the fan assembly being installed above the ceiling; The fan assembly includes a fan housing and a fan at least partially disposed within the fan housing, the fan including a volute and an impeller disposed within the volute; The fan box includes a top wall and a side wall connected to the top wall. The side wall is used to enclose the smoke inlet of the fan box. Alternatively, the fan box includes a top wall, a bottom wall and a side wall connected to both the top wall and the bottom wall. The bottom wall is provided with the smoke inlet of the fan box or the bottom wall is folded down to form the smoke inlet of the fan box. The flue includes a flue gas inlet section and a flue gas outlet section that are connected to each other. The flue gas inlet section is used to allow flue gas to flow into the flue. The flue gas outlet section of the flue is directly connected to the side wall of the fan box. The flue gas outlet section of the flue directly covers at least a portion of the side wall of the fan box, or at least a portion of the side wall of the fan box directly covers the flue gas outlet section of the flue.

2. The range hood according to claim 1, characterized in that, The flue is of unequal length in the left-right direction, the length of the flue gas outlet section is greater than the length of the flue gas inlet section, and / or the flue is of unequal width in the front-back direction, the width of the flue gas outlet section is greater than the width of the flue gas inlet section. or, The sidewall of the fan box is projected onto a horizontal plane as a rectangle or a near-rectangular shape, and the cross-section of the flue is a rectangle or a near-rectangular shape.

3. The range hood according to claim 2, characterized in that, The flue gas outlet section includes an expansion section; The expansion section includes a horizontally arranged horizontal section and a vertically arranged vertical section connected to the horizontal section; or, the expansion section includes an upwardly inclined section and a vertically arranged vertical section connected to the inclined section.

4. The range hood according to claim 3, characterized in that, The horizontal section is formed by the horizontal extension of the pipe wall of the flue, and the vertical section is formed by the vertical extension of the pipe wall of the flue from the horizontal section upwards; or, the inclined section is formed by the upward inclined extension of the pipe wall of the flue, and the vertical section is formed by the vertical extension of the pipe wall of the flue from the highest point of the inclined section upwards.

5. The range hood according to claim 3, characterized in that, At least the vertical section is used to be directly connected to the side wall of the fan box; at least a portion of the vertical section is used to directly cover at least a portion of the side wall of the fan box or at least a portion of the side wall of the fan box is used to directly cover at least a portion of the vertical section.

6. The range hood according to claim 2, characterized in that, The flue also includes a connecting section located between the flue gas inlet section and the flue gas outlet section. The connecting section and the flue gas inlet section have the same or substantially the same length in the left-right direction and / or width in the front-back direction.

7. The range hood according to claim 1, characterized in that, At least the flue gas outlet section is located above the suspended ceiling.

8. The range hood according to claim 1, characterized in that, The volute has a protrusion that extends downwards from the side wall of the fan box, and the flue gas outlet section is used to cover the protrusion.

9. The range hood according to claim 1, characterized in that, At least the flue gas outlet section includes a double-layer flue section, which comprises an outer pipe section and an inner pipe section. A noise reduction device is provided between the outer pipe section and the inner pipe section. The inner pipe section is provided with a sound-absorbing hole or is completely enclosed. Alternatively, the flue gas outlet section may include a single-layer flue pipe section, the flue pipe may also include a connecting section, the connecting section and / or the flue gas inlet section may include a double-layer flue pipe section, the double-layer flue pipe section may include an outer pipe section and an inner pipe section, a noise reduction device may be provided between the outer pipe section and the inner pipe section, and the inner pipe section may be provided with a sound-absorbing hole or the inner pipe section may be completely enclosed.

10. The range hood according to claim 1, characterized in that, The smoke pipe is either a rigid smoke pipe or a flexible smoke pipe. The smoke pipe is a one-piece molded structure. The smoke pipe is a double-layer smoke pipe, which includes an outer layer pipe and an inner layer pipe. A noise reduction device is provided between the outer layer pipe and the inner layer pipe. The inner layer pipe is provided with a sound-absorbing hole or the inner layer pipe is completely sealed.

11. The range hood according to claim 1, characterized in that, The range hood also includes a lower cavity, and the fan assembly, the flue pipe and the lower cavity are arranged sequentially from top to bottom.

12. The range hood according to claim 1, characterized in that, The fan box is made of plastic.

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