Range hood

Abstract

This utility model discloses a range hood. The range hood includes: a housing, in which a fan assembly is housed; and a smoke collection chamber connected to the housing, the smoke collection chamber having a downward-facing smoke collection cavity. The smoke collection chamber includes a rear plate surrounding the smoke collection cavity and a smoke extraction plate, the smoke extraction plate having smoke extraction holes, and the smoke extraction plate being inclined downwards from the rear to the front of the smoke collection cavity. The surface of the rear plate facing the smoke collection cavity has a ribbed structure, which is used to change the distribution of condensed oil on the surface of the rear plate facing the smoke collection cavity to prevent condensed oil from accumulating at the bottom of the rear plate. In the above-mentioned range hood, the ribbed structure on the surface of the rear plate facing the smoke collection cavity changes the distribution of condensed oil on the surface of the rear plate facing the smoke collection cavity, preventing condensed oil from accumulating at the bottom of the rear plate. This can, to a certain extent, avoid dripping caused by condensed oil accumulating at the bottom of the rear plate, thereby reducing the user's cleaning burden and improving the user experience.

Description

Technical Field

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

[0002] In related technologies, to meet the aesthetic requirements of kitchen spaces, range hoods can be concealed within cabinets. However, because the range hood is completely hidden inside the cabinet, its thickness needs to be controlled within the depth of the cabinet (e.g., within 320mm). This causes the air intake path of the range hood to be further back, resulting in oil easily accumulating at the bottom of the back panel and dripping onto the cooktop, creating a cleaning burden for users and affecting the user experience. Utility Model Content

[0003] This utility model provides a range hood to solve at least one of the above-mentioned technical problems.

[0004] This utility model provides a range hood. The range hood includes: The housing contains a fan assembly; A smoke collection chamber is connected to the box body. The smoke collection chamber has a downward-facing smoke collection cavity. The smoke collection chamber includes a rear plate and a smoke extraction plate that surround the smoke collection cavity. The smoke extraction plate has smoke extraction holes and is inclined downward from the rear side to the front side of the smoke collection chamber. The rear plate has a ribbed structure on the surface facing the smoke collection chamber. The ribbed structure is used to change the distribution of condensed oil on the surface of the rear plate facing the smoke collection chamber to prevent the condensed oil from accumulating at the bottom of the rear plate.

[0005] In the aforementioned range hood, the surface of the rear panel facing the smoke collection chamber is provided with a ribbed structure. The ribbed structure is used to change the distribution of condensed oil on the surface of the rear panel facing the smoke collection chamber, so as to prevent the condensed oil from accumulating at the bottom of the rear panel. This can, to a certain extent, avoid dripping caused by the accumulation of condensed oil at the bottom of the rear panel, thereby reducing the cleaning burden on users and improving the user experience.

[0006] In some embodiments, in the left-right direction of the range hood, the minimum length of the ribbed structure is L1, and the length of the rear plate is L2, where 0.6 ≤ L1 / L2 ≤ 0.9.

[0007] In some embodiments, the thickness of the rib structure is L3 in a direction perpendicular to the surface of the rear plate, where L3 ≥ 0.8 mm.

[0008] In some embodiments, the ribbed structure includes ribs that protrude from the surface of the rear plate facing the smoke collection chamber, the ribs being used to guide the flow direction of the condensed oil to change the distribution of the condensed oil on the surface of the rear plate facing the smoke collection chamber.

[0009] In some embodiments, the rib includes a first rib portion that is inclined relative to the horizontal plane.

[0010] In some embodiments, the ribs include a plurality of first rib portions spaced apart in the vertical direction of the range hood, wherein the first rib portions have a symmetrical structure along the central axis of the rear plate.

[0011] In some embodiments, the rib includes a plurality of second rib portions disposed at an angle relative to the horizontal plane, the second rib portions being connected to one end of two adjacent first rib portions.

[0012] In some embodiments, the ribbed structure is provided with grooves for accommodating condensed oil to alter the distribution of the condensed oil on the surface of the rear plate facing the smoke collection chamber.

[0013] In some embodiments, the groove includes a first groove portion extending in a horizontal direction.

[0014] In some embodiments, the groove includes a plurality of first groove portions spaced apart in the vertical direction of the range hood, wherein the first groove portions are groove portions symmetrical along the central axis of the rear plate.

[0015] In some embodiments, the groove includes a plurality of second groove portions extending in a vertical direction, the second groove portions being connected to one end of two adjacent first groove portions.

[0016] In some embodiments, the groove opening width is L4, where 2 mm ≤ L4 ≤ 10 mm.

[0017] In some embodiments, the ribbed structure and the rear plate are integrally formed.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 and Figure 2 This is a schematic diagram of the structure of the range hood according to an embodiment of the present utility model; Figure 3 and Figure 4 This is a cross-sectional schematic diagram of the range hood according to an embodiment of the present utility model; Figure 5 and Figure 6 This is a front view of the rear plate according to an embodiment of the present utility model; Figure 7 and Figure 8 This is a left view of the rear panel of an embodiment of the present invention.

[0021] Explanation of key component reference numerals: Range hood 1000, housing 100, smoke collection chamber 200, oil cup 300, check valve 400, air outlet device 500, fan assembly 600, smoke collection chamber 201, rear plate 202, smoke extraction plate 203, ribbed structure 204, front plate 205, left plate 206, right plate 207, first side plate 208, inner smoke extraction plate 210, smoke extraction hole 2031, rib 2041, groove 2042, first rib portion 2041a, second rib portion 2041b, first groove portion 2042a, second groove portion 2042b. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of the 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.

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of 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 or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] 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 communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0027] Please refer to Figures 1 to 4 This utility model provides a range hood 1000. The range hood 1000 includes a housing 100 and a smoke collection chamber 200. A fan assembly 600 is installed inside the housing 100. The smoke collection chamber 200 is connected to the housing 100 and has a downward-facing smoke collection cavity 201. The smoke collection chamber 200 includes a rear plate 202 and a smoke extraction plate 203 surrounding the smoke collection cavity 201. The smoke extraction plate 203 has smoke extraction holes 2031 and is inclined downwards from the rear to the front of the smoke collection chamber 200. A ribbed structure 204 is provided on the surface of the rear plate 202 facing the smoke collection cavity 201. The ribbed structure 204 is used to change the distribution of condensed oil on the surface of the rear plate 202 facing the smoke collection cavity 201 to prevent condensed oil from accumulating at the bottom of the rear plate 202.

[0028] In the aforementioned range hood 1000, the surface of the rear panel 202 facing the smoke collection chamber 201 is provided with a rib structure 204. The rib structure 204 is used to change the distribution of condensed oil on the surface of the rear panel 202 facing the smoke collection chamber 201, so as to prevent the condensed oil from accumulating at the bottom of the rear panel 202. This can, to a certain extent, avoid dripping caused by the accumulation of condensed oil at the bottom of the rear panel 202, thereby reducing the cleaning burden on users and improving the user experience.

[0029] Specifically, please combine Figure 1 The range hood 1000 has vertical, horizontal, and front-to-back orientations; the front orientation is the direction the range hood faces after installation. The range hood 1000 can be installed above the cooking area to absorb and remove cooking fumes, maintaining a clean and comfortable kitchen environment. Please refer to... Figure 1 and Figure 2 The range hood 1000 includes a housing 100 and a smoke collection chamber 200. A fan assembly 600 is installed inside the housing 100. The smoke collection chamber 200 is located below the housing 100 and can be fixedly connected to the lower end of the housing 100 by means of screws or welding. The smoke collection chamber 200 has a smoke collection cavity 201 with an opening at the lower end.

[0030] The smoke collection chamber 200 includes a smoke extraction plate 203 and a rear plate 202. The smoke extraction plate 203 has smoke extraction holes 2031. The smoke extraction plate 203 and the rear plate 202 form a smoke collection chamber 201. The smoke extraction plate 203 is inclined downwards from the rear side to the front side of the smoke collection chamber 200, allowing condensed oil on the smoke extraction plate 203 to flow obliquely downwards from back to front. The smoke collection chamber 201 can be used to collect and guide oil fumes. In one embodiment, the inner surface of the rear plate 202 forms the rear wall of the smoke collection chamber 201, and the inner surface of the smoke extraction plate 203 at least forms part of the top wall of the smoke collection chamber 201. The inner surface refers to the surface of the plate facing the smoke collection chamber 201.

[0031] During the operation of the range hood 1000, cooking fumes are drawn into the smoke collection chamber 201 by the fan assembly 600, and further enter the fan assembly 600 through the smoke holes 2031 on the smoke extraction plate 203, and are then discharged from the kitchen through the fan assembly 600. As the fumes pass through the smoke extraction plate 203, larger oil droplets and some grease in the fumes are separated by the baffle effect of the smoke extraction plate 203. Optionally, the range hood 1000 includes an oil cup 300, which is positioned near the front of the smoke collection chamber 200 to form a reverse-cavity range hood 1000. The grease separated by the smoke extraction plate 203 and the oil condensed on the smoke extraction plate 203 can be collected in the oil cup 300, thereby reducing the grease content entering the fan assembly 600, extending the service life of the range hood 1000, and facilitating subsequent cleaning and maintenance.

[0032] It is understandable that, because the smoke extraction plate 203 is inclined downwards from the rear to the front of the smoke collection chamber 200, the angle between the smoke extraction plate 203 and the wall where the range hood 1000 is located is acute when the range hood 1000 is installed. This arrangement optimizes the pressure radiation direction of the range hood 1000, increases the negative pressure zone area, and improves the smoke extraction effect. Furthermore, the grease and oil separated by the smoke extraction plate 203 will flow to the front end of the smoke extraction plate 203 under the influence of gravity. The oil cup 300 can be located below the front end of the smoke extraction plate 203 to collect the dripping grease. This allows users to more easily disassemble and install the oil cup 300, improving the user experience.

[0033] Optionally, in the installed state, the rear surfaces of the housing 100 and the smoke collection chamber 200 of the range hood 1000 are vertically arranged to fit against or be close to the wall, while the front side of the housing 1000 is away from the wall and close to the user. After installation, the housing 1000 and the smoke collection chamber 200 can be housed in a cabinet, making the kitchen more tidy.

[0034] In one embodiment, the range hood 1000 includes a check valve 400, which is connected to the air outlet and the exhaust pipe of the housing 100 respectively, and is used to realize the one-way exhaust function.

[0035] In one embodiment, the smoke collection chamber 200 further includes a front plate 205, a left plate 206, and a right plate 207, which together form a smoke collection chamber 201. In one embodiment, the inner surface of the front plate 205 forms the front wall of the smoke collection chamber 201, the inner surface of the left plate 206 forms the left wall of the smoke collection chamber 201, and the inner surface of the right plate 207 forms the right wall of the smoke collection chamber 201.

[0036] In one embodiment, the smoke collection cavity 200 includes a first side plate 208, which is closer to the rear side of the smoke collection cavity 200 than the rear plate 202. The lower end of the rear plate 202 is connected to the lower end of the first side plate 208, and the rear plate 202 extends from the lower end of the first side plate 208 toward the front and top of the range hood 1000.

[0037] In one embodiment, the range hood 1000 includes an exhaust device 500 disposed on the left and / or right side of the smoke collection chamber 201, which is used to promote the movement of smoke towards the rear side, thereby reducing the risk of smoke escaping from the front side of the range hood 1000.

[0038] In related technologies, to meet the demands of integrated and streamlined kitchen design, range hoods are often designed to be completely concealed within cabinets, achieving a seamless and aesthetically pleasing integration with the cabinetry. These range hoods are typically referred to as fully concealed or fully integrated range hoods. Since cabinet depth is generally limited, the overall thickness of the range hood must be controlled within the cabinet depth, for example, within 320mm. However, when the overall thickness is limited, the internal air duct design and air inlet position are also affected, often requiring the air intake path of a fully concealed range hood to be positioned closer to the rear of the unit. During cooking, the large amount of fumes produced are drawn into the unit and condense upon contact with the cooler metal back panel, forming oil droplets. These droplets gradually converge downwards under gravity and drip onto the cooktop, increasing the cleaning burden and negatively impacting the user experience.

[0039] In this embodiment of the invention, the surface of the rear plate 202 facing the smoke collection chamber 201 is provided with a ribbed structure 204. The ribbed structure 204 is used to change the distribution of condensed oil on the surface of the rear plate 202 facing the smoke collection chamber 201 to prevent condensed oil from accumulating at the bottom of the rear plate 202. Specifically, during cooking, when oil fumes enter the smoke collection chamber 201 and come into contact with the surface of the rear plate 202, the condensed oil formed will not directly slide down the surface of the rear plate 202 to the bottom under the action of gravity. Instead, it is guided or retained by the ribbed structure 204, thereby changing its distribution on the surface of the rear plate 202. This effectively prevents condensed oil from accumulating and dripping at the bottom of the rear plate 202, thereby reducing the risk of condensed oil dripping onto the stove, improving the user's cleaning experience, and enhancing the comfort of using the range hood 1000.

[0040] Optionally, in one embodiment, the smoke-collecting plate 203 can serve as an outer smoke-collecting plate, and the smoke-collecting cavity 200 further includes an inner smoke-collecting plate 210, which is located on the side of the outer smoke-collecting plate opposite to the opening of the smoke-collecting cavity 201. Accordingly, the inner smoke-collecting plate 210 is also provided with smoke holes 2031, and the distribution, number, and shape of the smoke holes 2031 in both can be the same or different.

[0041] In some implementations, please refer to Figure 5 and Figure 6 In the left-right direction of the range hood 1000, the minimum length of the rib structure 204 is L1, and the length of the back plate 202 is L2, 0.6≤L1 / L2≤0.9.

[0042] In the above embodiments, the effectiveness of the ribbed structure 204 in intervening with the condensing oil can be improved, and at the same time, the excessive length of the ribbed structure 204 can be avoided to a certain extent from affecting the overall strength and processing technology of the back plate 202.

[0043] Specifically, the minimum length L1 of the ribbed structure 204 refers to the minimum dimension of the ribbed structure 204 in the left-right direction. The length L2 of the back plate 202 refers to the dimension of the back plate 202 in the left-right direction.

[0044] The ratio 0.6≤L1 / L2≤0.9 can improve the effectiveness of the ribbed structure 204 in intervening with the condensing oil, and can also prevent the ribbed structure 204 from being too long and affecting the overall strength and processing technology of the back plate 202.

[0045] By setting 0.6≤L1 / L2≤0.9, the condensed oil can be evenly dispersed on the surface of the back plate 202, preventing it from concentrating at the bottom edge of the back plate 202 and thus preventing the condensed oil from accumulating and dripping to a certain extent. In addition, the structural stability and manufacturing cost of the back plate 202 are also taken into account, ensuring that the ribbed structure 204 is not easily deformed during the molding process, while also ensuring that the back plate 202 as a whole still has good flatness.

[0046] In some examples, L1 / L2 = 0.6, 0.63, 0.66, 0.69, 0.72, 0.75, 0.78, 0.81, 0.84, 0.87, 0.9, or other values ​​that satisfy 0.6 ≤ L1 / L2 ≤ 0.9.

[0047] In some implementations, please refer to Figure 7 and Figure 8 In the direction perpendicular to the surface of the rear plate 202, the thickness of the rib structure 204 is L3, where L3 ≥ 0.8 mm.

[0048] In the above embodiments, the bottom of the condensate oil back plate 202 is further prevented from accumulating and dripping, thereby reducing the user's cleaning burden to a certain extent and improving the user experience.

[0049] Specifically, the thickness of the rib structure 204 refers to the dimension of the rib structure 204 in the direction perpendicular to the surface of the rear plate 202.

[0050] L3≥0.8 mm can, to a certain extent, ensure that the ribbed structure 204 has sufficient structural strength and stability after molding, and is not prone to deformation during the processing of the back plate 202 or long-term use.

[0051] In one embodiment, the rib structure 204 includes ribs 2041 that protrude from the surface of the rear plate 202 toward the smoke collection chamber 201. The greater thickness can give the ribs 2041 a significant height difference, guiding the condensed oil to flow along the extension direction of the ribs 2041 and to a certain extent preventing the condensed oil from sliding directly down to the bottom of the rear plate 202.

[0052] In one embodiment, the ribbed structure 204 is provided with a groove 2042, and the greater thickness can provide a larger volume of the groove 2042, thereby achieving a better oil retention effect.

[0053] In some examples, L3 is equal to 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, or other values ​​that satisfy L3 ≥ 0.8 mm.

[0054] Optionally, the upper limit of the thickness L3 of the rib structure 204 can be determined based on factors including but not limited to the material properties of the back plate 202, the molding process, the structural strength requirements, and the effect of preventing condensate from dripping. This utility model does not impose specific limitations in this regard.

[0055] In some implementations, please refer to Figure 1 , Figure 3 , Figure 5 and Figure 7 The rib structure 204 includes ribs 2041, which protrude from the surface of the rear plate 202 toward the smoke collection chamber 201. The ribs 2041 are used to guide the flow direction of the condensed oil to change the distribution of the condensed oil on the surface of the rear plate 202 toward the smoke collection chamber 201.

[0056] In the above embodiments, the ribs 2041 can disperse the oil, which helps to slow down the rate at which it accumulates at the bottom of the rear plate 202, reducing the cleaning burden on the user.

[0057] Specifically, in Figure 1 , Figure 3 , Figure 5 and Figure 7 In one embodiment, the rib 2041 can be formed by pressing the back plate 202, that is, directly stamping the rib 2041 with a certain height and extension direction onto the surface of the back plate 202. In other embodiments, the rib 2041 can also be a protruding structure provided on the surface of the back plate 202 facing the smoke collection chamber 201. Optionally, it can be combined with the back plate 202 by welding, riveting, or die forming.

[0058] Ribs 2041 are used to guide the flow direction of condensed oil to change the distribution of condensed oil on the surface of the rear plate 202 facing the smoke collection chamber 201. Figure 5 In the diagram, the arrows indicate the flow direction of the condensed oil. When oil fumes enter the smoke collection chamber 201 and condense into oil droplets on the surface of the rear plate 202, the oil droplets encounter the obstruction of the ribs 2041 as they move downwards under the influence of gravity. Since the ribs 2041 extend in the left-right direction, most of the condensed oil flows along the extension direction of the ribs 2041 on their surface, while a small portion of the condensed oil moves downwards across the ribs 2041. After a long displacement, the oil is evenly distributed on the surface of the rear plate 202 facing the smoke collection chamber 201 instead of accumulating at the bottom of the rear plate 202 and dripping down.

[0059] In some implementations, please refer to Figure 7 The rib 2041 includes a first rib portion 2041a that is inclined relative to the horizontal plane.

[0060] In the above embodiments, a guiding effect can be generated during the natural migration of condensed oil under the action of gravity, so as to disperse the condensed oil and reduce the oil accumulation at the bottom of the rear plate 202.

[0061] Specifically, the first rib portion 2041a is inclined relative to the horizontal plate, that is, the first rib portion 2041a is arranged at a certain angle in three-dimensional space, so that the first rib portion 2041a forms a height difference in its extension direction. During the flow of condensed oil, it will not flow rapidly in a straight direction to the bottom of the rear plate 202, but will be guided by this height difference to flow along the extension direction of the first rib portion 2041a, so that the condensed oil can be dispersed to different areas of the rear plate 202 facing the smoke collection chamber 201.

[0062] In some implementations, please refer to Figure 7 The rib 2041 includes a plurality of first rib portions 2041a spaced apart in the vertical direction of the range hood 1000. The first rib portions 2041a have a symmetrical structure along the central axis M of the rear plate 202.

[0063] In the above embodiments, the multiple symmetrical first rib portions 2041a can further improve the prevention of condensed oil from accumulating and dripping at the bottom of the rear plate 202, while also making the distribution of condensed oil in the left and right directions of the rear plate 202 more even.

[0064] Specifically, multiple first rib sections 2041a are arranged sequentially at intervals in the vertical direction, so that the condensed oil will pass through different rib sections 2041 in sequence during the downward flow of the range hood, thereby being guided or dispersed at multiple locations. Furthermore, the first rib sections 2041a are symmetrically arranged with respect to the rear central axis M of the range hood 1000, which can make the distribution of condensed oil in the left and right directions of the rear plate 202 more even, improving the dispersion effect of condensed oil and the overall uniformity of oil guiding.

[0065] In some implementations, please refer to Figure 7 The rib 2041 includes a plurality of second rib portions 2041b arranged at an inclination relative to the horizontal plane, and the second rib portions 2041b are connected to one end of two adjacent first rib portions 2041a.

[0066] In the above embodiments, oil droplets are further prevented from accumulating and falling at the bottom of the rear plate 202.

[0067] Specifically, the second rib portion 2041b is inclined relative to the horizontal plate, that is, the second rib portion 2041b is arranged at a certain angle in three-dimensional space, so that the second rib portion 2041b forms a certain guiding characteristic in space. When the condensed oil moves from top to bottom on the surface of the rear plate 202, the oil droplets will first pass through the first rib portion 2041a and disperse along the extension direction of the first rib portion 2041a; subsequently, as the oil droplets continue to move downward, they will enter the guiding path of the second rib portion 2041b, and under the action of its inclined structure, some of the condensed oil will be further guided to the next adjacent first rib portion 2041a, thereby further extending the movement path of the condensed oil and dispersing it at different positions on the surface of the rear plate 202.

[0068] Furthermore, when the second rib portion 2041b connects two adjacent first rib portions 2041a, it can form a continuous oil guiding network, further preventing oil droplets from accumulating and falling at the bottom of the rear plate 202.

[0069] In some implementations, please refer to Figure 2 , Figure 4 , Figure 6 and Figure 8 The ribbed structure 204 is provided with a groove 2042, which is used to accommodate condensed oil to change the distribution of condensed oil on the surface of the rear plate 202 facing the smoke collection chamber 201.

[0070] In the above embodiments, the groove 2042 can store oil, which helps to slow down the rate at which it accumulates at the bottom of the rear plate 202 and reduces the cleaning burden on the user.

[0071] Specifically, in Figure 2 , Figure 4 , Figure 6 and Figure 8 In one embodiment, the groove 2042 can be formed by pressing the back plate 202, that is, by applying a stamping process to a local area of ​​the surface of the back plate 202, causing that area to be recessed relative to the adjacent area, thereby obtaining a groove-shaped structure with a certain depth and volume. In other embodiments, the groove 2042 can also be a groove-shaped structure formed by processes such as cutting. It should be understood that in this case, the thickness of the back plate 202 should not be less than the thickness of the groove 2042.

[0072] The groove 2042 is used to accommodate condensed oil to change the distribution of condensed oil on the surface of the rear plate 202 facing the smoke collection chamber 201. Figure 6 In the diagram, the arrow indicates the flow direction of the condensed oil. The groove 2042 can intercept and collect the oil droplets as they flow along the surface of the back plate 202, so that the condensed oil is preferentially collected in the groove 2042. This, to a certain extent, prevents the condensed oil from gathering in the bottom edge area of ​​the back plate 202 and dripping directly onto the stove surface.

[0073] In some implementations, please refer to Figure 6 The groove 2042 includes a first groove portion 2042a extending in a horizontal direction.

[0074] In the above embodiments, oil can be stored to disperse condensed oil and reduce the accumulation of oil at the bottom of the rear plate 202.

[0075] Specifically, the first groove portion 2042a extends in the left-right direction and its length direction is parallel to the horizontal plane, so that the first groove portion 2042a can laterally intercept and temporarily store the oil droplets under the gravity of the condensed oil, and allow the condensed oil to diffuse in the left-right direction.

[0076] In some implementations, please refer to Figure 6 The groove 2042 includes a plurality of first groove portions 2042a spaced apart in the vertical direction of the range hood 1000. The first groove portions 2042a are groove portions symmetrical along the central axis M of the rear plate 202.

[0077] In the above embodiments, the multiple symmetrical first groove portions 2042a can further improve the prevention of condensed oil from accumulating and dripping at the bottom of the rear plate 202, while also making the distribution of condensed oil in the left-right direction of the rear plate 202 more even.

[0078] Specifically, multiple first groove portions 2042a are arranged sequentially at intervals in the vertical direction. As the condensed oil moves down along the surface of the rear plate 202, the condensed oil will preferentially enter the nearest first groove portion 2042a below and be stored there. When the volume of the first groove portion 2042a is gradually filled, the excess condensed oil will continue to flow downward and enter another adjacent first groove portion 2042a below, thereby realizing the step-by-step interception and storage of oil droplets.

[0079] Furthermore, the first groove portion 2042a is a groove portion symmetrical along the central axis M of the rear plate 202, which can make the condensed oil tend to be evenly distributed in the left and right directions of the rear plate 202.

[0080] In some implementations, please refer to Figure 6 The groove 2042 includes a plurality of second groove portions 2042b extending in a vertical direction, and the second groove portions 2042b are connected to one end of two adjacent first groove portions 2042a.

[0081] In the above embodiments, oil droplets are further prevented from accumulating and falling at the bottom of the rear plate 202.

[0082] Specifically, multiple second groove portions 2042b extend vertically and are interconnected in the vertical direction, and are also connected to the first groove portion 2042a, so that condensed oil can be transferred between the first groove portion 2042a and the second groove portion 2042b.

[0083] When the condensed oil accumulates to a certain amount in the first groove portion 2042a, some of the oil can flow along the second groove portion 2042b and be guided to the other first groove portion 2042a below.

[0084] Optionally, in one embodiment, the number of first groove portions 2042a is greater than or equal to 3, thereby ensuring the oil storage capacity of the grooves 2042 to a certain extent. Correspondingly, the number of second groove portions 2042b is greater than or equal to 4.

[0085] In some implementations, please refer to Figure 8 The groove width of groove 2042 is L4, where 2 mm ≤ L4 ≤ 10 mm.

[0086] In the above embodiments, on the one hand, the oil holding efficiency of the groove 2042 can be improved, and on the other hand, the structural strength of the back plate 202 can be improved.

[0087] Specifically, the groove width of the groove 2042 refers to the dimension of the groove opening of the groove 2042 in the extension direction of the back plate 202. When the groove width L4 is too small (for example, less than 2 mm), the condensed oil will not easily enter the groove 2042, thereby reducing the oil holding efficiency of the groove 2042. When the groove width L4 is too large (for example, greater than 10 mm), it may affect the structural strength of the back plate 202.

[0088] In some examples, the groove width L4 of groove 2042 is 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, or other values ​​that satisfy 2 mm ≤ L4 ≤ 10 mm.

[0089] In some embodiments, the ribbed structure 204 and the rear plate 202 are integrally formed.

[0090] In the above embodiments, the number of parts can be reduced, the assembly complexity of the range hood 1000 can be reduced, production efficiency can be improved, and the bonding strength and overall stability of the rib structure 204 and the back plate 202 can be enhanced.

[0091] Optionally, the rib structure 204 can be formed simultaneously during the stamping, pressing or injection molding process of the back plate 202, so that there is no additional splicing gap between the rib structure 204 and the back plate 202, thereby avoiding the problem of condensate leakage or scale buildup caused by splicing gaps to a certain extent.

[0092] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0093] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A range hood, characterized in that, include: The housing contains a fan assembly; A smoke collection chamber is connected to the box body. The smoke collection chamber has a downward-facing smoke collection cavity. The smoke collection chamber includes a rear plate and a smoke extraction plate that surround the smoke collection cavity. The smoke extraction plate has smoke extraction holes and is inclined downward from the rear side to the front side of the smoke collection chamber. The rear plate has a ribbed structure on the surface facing the smoke collection chamber. The ribbed structure is used to change the distribution of condensed oil on the surface of the rear plate facing the smoke collection chamber to prevent the condensed oil from accumulating at the bottom of the rear plate.

2. The range hood according to claim 1, characterized in that, In the left-right direction of the range hood, the minimum length of the ribbed structure is L1, and the length of the rear plate is L2, where 0.6 ≤ L1 / L2 ≤ 0.

9.

3. The range hood according to claim 1, characterized in that, In the direction perpendicular to the surface of the rear plate, the thickness of the rib structure is L3, where L3 ≥ 0.8 mm.

4. The range hood according to claim 1, characterized in that, The ribbed structure includes ribs that protrude from the surface of the rear plate facing the smoke collection chamber. The ribs are used to guide the flow direction of the condensed oil to change the distribution of the condensed oil on the surface of the rear plate facing the smoke collection chamber.

5. The range hood according to claim 4, characterized in that, The rib includes a first rib portion that is inclined relative to the horizontal plane.

6. The range hood according to claim 5, characterized in that, The ribs include a plurality of first rib portions spaced apart in the vertical direction of the range hood, and the first rib portions have a symmetrical structure along the central axis of the rear plate.

7. The range hood according to claim 6, characterized in that, The rib includes a plurality of second rib portions that are inclined relative to the horizontal plane, and the second rib portions are connected to one end of two adjacent first rib portions.

8. The range hood according to claim 1, characterized in that, The ribbed structure is provided with grooves, which are used to accommodate condensed oil to change the distribution of condensed oil on the surface of the rear plate facing the smoke collection chamber.

9. The range hood according to claim 8, characterized in that, The groove includes a first groove portion that extends in a horizontal direction.

10. The range hood according to claim 9, characterized in that, The groove includes a plurality of first groove portions spaced apart in the vertical direction of the range hood, wherein the first groove portions are groove portions symmetrical along the central axis of the rear plate.

11. The range hood according to claim 10, characterized in that, The groove includes a plurality of second groove portions extending in a vertical direction, and the second groove portions are connected to one end of two adjacent first groove portions.

12. The range hood according to claim 8, characterized in that, The groove opening width is L4, where 2 mm ≤ L4 ≤ 10 mm.

13. The range hood according to any one of claims 1-12, characterized in that, The ribbed structure and the rear plate are integrally formed.

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