A range hood

Abstract

The utility model discloses a kind of range hood, including shell and the fan system being set in shell, the axis of fan system extends in front-back direction, the fan system includes backward first suction inlet;The first ventilation component for receiving oil dropped by fan system is provided in shell or the bottom of shell, and the first ventilation component includes the first ventilation component body being set corresponding to the position below fan system, the first ventilation component body includes first part and second part, first ventilation hole is opened in the first part, the second part has the ridge portion that is upwardly protruding relative to first part and the side portion located in the left and right sides of ridge portion, the side portion gradually inclines downward in the direction away from ridge portion, and first ventilation hole is at least distributed in the left and right sides of second part;In horizontal plane projection, the distance between ridge portion and the axis of fan system is d4, and satisfy d4≤D / 2, wherein D is the diameter of first suction inlet.

Description

Technical Field

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

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. They operate on the principles of fluid dynamics, using a fan system installed inside to draw in and exhaust cooking fumes, and a filter to remove some of the grease particles.

[0003] To improve the fume extraction effect, range hoods are usually equipped with components that guide the flow of fumes. For example, Chinese Patent Application No. 202022223582.3 discloses a centrifugal fan whose volute includes a front cover plate, a rear cover plate, a surrounding plate, and a guide frame. The front and rear cover plates are arranged in parallel and are located on both sides of the upper part of the guide frame. The surrounding plate is set in the cavity formed by the front and rear cover plates and the guide frame, and the front and rear cover plates and the surrounding plate together form a guide space. The outlet of the guide space is connected to the exhaust port of the range hood.

[0004] The deflector of this type of range hood can guide the fumes into the air inlet of the centrifugal fan. However, since the corresponding part of the deflector is flat and does not change along the width of the air inlet, the fumes may be guided to parts outside the air inlet and cannot truly promote the flow of fumes towards the central air inlet, resulting in a limited guiding effect. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a range hood in which the shape of the first ventilation component matches the convergence direction of the oil fume airflow, which can promote the flow of oil fume towards the intake of the fan.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problem is as follows: a range hood, comprising a housing and a fan system disposed within the housing, wherein the axis of the fan system extends in a front-to-back direction, and the fan system includes a rearward-facing first suction inlet; characterized in that:

[0007] The outer casing or the bottom of the outer casing is provided with a first ventilation component to receive the oil dripping from the fan system. The first ventilation component includes a first ventilation component body located at a position corresponding to the lower part of the fan system. The first ventilation component body includes a first part and a second part. The first part has a first ventilation hole. The second part has a ridge that protrudes upward relative to the first part and side parts located on the left and right sides of the ridge. The side parts gradually slope downward away from the ridge. The first ventilation hole is distributed at least on the left and right sides of the second part.

[0008] On the horizontal plane projection, the distance between the axis of the ridge and the axis of the fan system is d4, and d4≤D / 2, where D is the diameter of the first inlet.

[0009] By forming a first part and a second part in the body of the first ventilation component located below the fan system, the second part arches from the left and right sides toward the middle to form a cavity, thereby making the convergence direction of the oil fume airflow match the first intake port on the rear side, thus promoting the flow of oil fumes toward the first intake port.

[0010] Furthermore, to increase the air intake area, the first ventilation component body has a first end located at the rear and a second end located at the front, and a first air inlet is formed on the first ventilation component body; the first air inlet is located between the second part and the first end of the first ventilation component body, and the end of the second part near the first air inlet forms one side edge of the first air inlet.

[0011] To facilitate the collection of oil on the first ventilation component, the first part gradually slopes downward from front to back, and the ridge and side parts also gradually slope downward from front to back.

[0012] Preferably, a first oil leakage hole is formed at the first end of the first ventilation component body. On the horizontal projection, the distance between the first oil leakage hole and the axis of the fan system is d5, and d5≥50mm is satisfied, so that the first oil leakage hole maintains a sufficient distance from the middle of the fan system where the wind speed is high to avoid the influence of high-speed airflow on the oil.

[0013] Furthermore, in the horizontal projection and in the vertical projection, the distance between the axis of the fan system and the first oil leakage hole is h1. When h1≤350mm, (d5+d4) / h1=tanθ, and θ≥10°, thereby reducing the interference of airflow on the oil dripping path on both sides and preventing the oil from drifting towards the center.

[0014] Preferably, the first ventilation component body has a first end located at the rear side and a second end located at the front side, the side of the second portion of the first ventilation component body away from the ridge extends to the first end of the first ventilation component body, and the first oil leakage hole is formed at the transition position between the side of the second portion and the first end of the first ventilation component body.

[0015] To facilitate the downward flow and collection of oil on the first part of the first ventilation component, a second oil leakage hole is formed at the first end of the body of the first ventilation component. The distance between the second oil leakage hole and the axis of the fan system is greater than the distance between the first oil leakage hole and the axis of the fan system.

[0016] Furthermore, the outer casing includes a first housing, a second housing, and a smoke collection hood disposed at the bottom of the first housing. The smoke collection hood has a smoke inlet. The first housing at least partially covers the outer periphery of the second housing and is at least partially located below the second housing. The first housing is movable relative to the second housing. A first ventilation component is disposed on the second housing, and a second ventilation component is disposed at the smoke inlet. This change in the working mode of the range hood achieves both excellent smoke extraction during operation and a clean and aesthetically pleasing appearance when off. Furthermore, when the range hood is in its smoke extraction operating state with the first housing lowered, a sufficiently deep air intake channel is formed between the second and first ventilation components to meet the airflow requirements.

[0017] Furthermore, the fan system also includes a second intake facing forward, the first intake being the main intake, the front-to-back depth of the portion of the housing containing the fan system is B', the vertical distance between the projection of the front end of the second portion and the rear sidewall of the portion of the housing containing the fan system on the horizontal plane is B1', and B1' / B'≥1 / 2 is satisfied, thereby promoting the front-to-back diversion of oil fumes at the second portion, and most of the oil fumes are diverted to the rear and enter the first intake.

[0018] Furthermore, the fan system also includes a second intake facing forward, the first intake being the main intake, the axis of the fan system extends horizontally front to back, the width of the fan system is B, the vertical distance between the projection of the front end of the second part and the first intake on the horizontal plane is B1, and satisfies B1 / B≥2 / 3, thereby promoting the front and rear diversion of oil fumes at the second part, and most of the oil fumes are diverted to the rear and enter the first intake.

[0019] Compared with the prior art, the advantages of this utility model are as follows: by making the ventilation component body of the first ventilation component located below the fan system form a first part and a second part, the second part arches from the left and right sides toward the middle to form a cavity, thereby making the convergence direction of the oil fume airflow match the first intake port on the rear side, thereby promoting the flow of oil fume toward the first intake port. Attached Figure Description

[0020] Figure 1 This is a schematic diagram (first state) of a range hood according to an embodiment of the present utility model;

[0021] Figure 2 This is an exploded structural diagram of the range hood according to an embodiment of the present utility model;

[0022] Figure 3 This is a cross-sectional view (first state, front and rear section) of the range hood according to an embodiment of the present utility model;

[0023] Figure 4 for Figure 3 A magnified schematic diagram of part I;

[0024] Figure 5 This is a schematic diagram of the first ventilation component of the range hood according to an embodiment of the present utility model;

[0025] Figure 6 This is a cross-sectional view (front and rear section) of the first ventilation component of the range hood according to an embodiment of the present utility model;

[0026] Figure 7 This is a cross-sectional view of the range hood according to an embodiment of the present utility model (first state, left-right cross-section, viewed from back to front);

[0027] Figure 8 This is a schematic diagram of the concealed second housing portion, the first housing, the second ventilation component, and the oil cup of the range hood according to an embodiment of the present utility model;

[0028] Figure 9 This is a cross-sectional view (left-right section) of the second housing, motion mechanism, and second ventilation component of the range hood according to an embodiment of the present utility model;

[0029] Figure 10 for Figure 9 A magnified schematic diagram of part II;

[0030] Figure 11 This is a schematic diagram (second state) of a range hood according to an embodiment of the present utility model;

[0031] Figure 12 This is a cross-sectional view (second state, front and rear section) of the range hood according to an embodiment of the present utility model;

[0032] Figure 13 for Figure 12 A magnified schematic diagram of part III. Detailed Implementation

[0033] The embodiments of the present invention 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.

[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0035] See Figures 1 to 8 A range hood, specifically a top-mounted range hood, includes an outer casing comprising a first housing 11 and a second housing 12. The first housing 11 at least partially covers the outer periphery of the second housing 12 and is at least partially located below the second housing 12. The second housing 12 can be fixed to an external mounting base, such as a wall, while the first housing 11 can be raised and lowered relative to the second housing 12. Both the first housing 11 and the second housing 12 are hollow structures, fluidly connected to each other, and preferably both have rectangular horizontal cross-sections.

[0036] The outer casing also includes a smoke collection hood 6 disposed at the bottom of the first housing 11, extending forward beyond the front side of the first housing 11. A smoke collection cavity 61, rising upwards from the bottom, is formed within the smoke collection hood 6, and a smoke inlet 62 is formed at the top of the smoke collection cavity 61. By forming the upwardly rising smoke collection cavity 61, it serves to collect smoke, preventing fumes from escaping upon contact with the smoke collection hood 6. Furthermore, because it rises upwards, it avoids being exposed at the bottom of the smoke collection hood 6, thus better concealing the lifting smoke machine. The depth of the smoke collection cavity 61 in the front-rear direction is S, the angle between the front wall of the smoke collection cavity 61 formed by the smoke collection hood 6 and the horizontal direction is θ1, and the angle between the rear wall of the smoke collection cavity 61 formed by the smoke collection hood 6 and the horizontal direction is θ2. To ensure the smoke collection effect of the smoke collection cavity 61, S ≥ 280 mm, θ1 ≥ 25°. To ensure the oil guiding function, θ2 ≥ 12° and the aforementioned β ( Figure 6 (as shown in the figure) ≥12°.

[0037] The range hood also includes a fan system 2 and a filter assembly. The fan system 2 is at least partially disposed within the second housing 12. In this embodiment, the fan system 2 is a centrifugal fan. The filter assembly includes a second ventilation component 31 and a first ventilation component 32. The second ventilation component 31 is disposed at the smoke inlet 62, while the first ventilation component 32 is disposed at the bottom of the second housing 12 and connected to the bottom of the second housing 12, thereby collecting the oil flowing down the inner wall of the second housing 12 and the fan system 2. The first ventilation component 32 and the second housing 12 can be directly or indirectly connected; they can be connected inside or outside the second housing 12. To ensure that the first ventilation component 32 can collect oil flowing down the inner wall of the second housing 12, when the connection point is inside the second housing 12, the first ventilation component 32 or the additionally arranged connector contacts the inner wall of the second housing 12; when the connection point is outside the second housing 12, the first ventilation component 32 or the additionally arranged connector at least partially covers the bottom edge of the second housing 12 in its horizontal projection. In this embodiment, the front and rear sides of the first ventilation component 32 are connected to the inner side of the second housing 12, while the left and right sides are connected to the lower side of the second housing 12. See [reference needed]. Figure 4 The connection point on the front side of the first ventilation component 32 is located on the rear side of the front wall of the second housing 12, and the two can be fixed by screws extending forward and backward. See also Figure 9 and Figure 10 The connection point on the right side of the first ventilation component 32 is located below the right side wall of the second housing 12 (a flange can be formed here), and the two can be fixed together by screws extending vertically. First ventilation component

[0038] The first ventilation component 32 includes a first ventilation component body 321 and a first ventilation hole 322 formed on the first ventilation component body 321. The first ventilation component body 321 is correspondingly located above the second ventilation component body 311. The first ventilation hole 322 is also an elongated ventilation hole and extends back and forth. The second ventilation component 31 includes a second ventilation component body 311 and a second ventilation hole 312 formed on the second ventilation component body 311. In this embodiment, the second ventilation component body 311 is generally flat, and the second ventilation hole 312 is an elongated ventilation hole that extends back and forth, thus the second ventilation component 31 is configured as a grille. To avoid oil dripping, the second ventilation hole 312 and the first ventilation hole 322 are arranged alternately, that is, the second ventilation hole 312 corresponds to the solid portion between two adjacent first ventilation holes 322, and the first ventilation hole 322 corresponds to the solid portion between two adjacent first ventilation holes 322. The first ventilation component 32's body 321 includes a first portion 3211 and a second portion 3212. The first ventilation hole 322 is formed on the first portion 3211, which is also generally flat. In this embodiment, both the first ventilation component 32 and the second ventilation component 31 are filters, but alternatively, they can be formed by opening holes in a plate.

[0039] The lifting and lowering of the first housing 11 can meet the needs of smoke collection during operation (second state) and concealment during non-operation (first state). Moreover, through the above structure, the change of the distance between the second ventilation component 31 and the first ventilation component 32 can be achieved without setting up a separate motion mechanism, which simplifies the structure and reduces costs.

[0040] The vertical distance between the highest point of the second part 3212 and the reference plane containing the first part 3211 is d2, and d2 ≥ 5mm, thereby ensuring that the second part 3212 protrudes to a sufficient height to provide a sufficient flow area. Furthermore, considering the compactness of the entire unit, it is preferable that d2 ≤ 25mm. The aforementioned reference plane refers to the plane at the intersection of the first part 3211 and the second part 3212 (all points at the intersection are on the same plane).

[0041] An oil cup 4 is located at the rear bottom of the first housing 11. Both the second ventilation component 31 and the first ventilation component 32 extend gradually downwards from front to back to guide accumulated oil into the oil cup 4. In the oil fume flow path, the fan system 2 is located downstream of the first ventilation component 32. The fan system 2 extends forward and backward along its axis X, including a first intake 21 as the main intake and a second intake 22 as a secondary intake. The rearward orientation of the first intake 21 reduces the aerodynamic noise of the fan system 2, keeping it further away from human ears.

[0042] Correspondingly, the first part 3211 covers the outer periphery of the second part 3212 on the front, left, and right sides. A first air inlet 323 is formed on the body 321 of the first ventilation component, and the rear end of the second part 3212 forms one edge of the first air inlet 323. Thus, during ventilation and during fume extraction, air can flow upwards along the edge of the second part 3212 after passing through it. A third ventilation hole 324 can also be opened on the second part 3212 to increase the air intake area for air during ventilation and fume extraction. Moreover, the third ventilation hole 324 allows airflow to flow directly upwards from the second part 3212 when entering the larger space between the second ventilation component 31 and the first ventilation component 32, reducing energy loss caused by airflow turning.

[0043] The second part 3212 can be shaped like an arch rising from the left and right sides towards the middle, with the middle arched part forming the ridge 3213. The left and / or right sides of the ridge 3213 form the side parts 3214. In this embodiment, both sides have side parts 3214, and each side part 3214 gradually slopes downward away from the ridge 3213. The horizontal distance between the projection of the ridge 3213 and the axis X of the fan system 2 onto the horizontal plane is d4 (measured with the ridge 3213 at its midpoint in the left-right direction as the reference), and satisfies d4≤D / 2, where D is the diameter of the first suction port 21. d4 represents the degree of deviation between the ridge 3212 and the axis X of the fan system 2. Therefore, satisfying d4≤D / 2 allows the ridge 3213 to correspond to the range of the first intake port 21 of the fan system 2. Thus, the shape adopted by the second part 3212, that is, arching from the left and right sides towards the middle to form a cavity, allows the oil fume airflow to converge from the left and right sides towards the middle along the second part 3212. After converging, it can be located within the range of the first intake port 21. That is, the design of the second part 3212 makes the oil fume convergence direction match the rear first intake port 21, so as to promote the oil fume flow to the first intake port 21.

[0044] Therefore, the first air inlet 323 and the first intake 21 of the fan system 2 work together. The protruding second part 3212 can guide the airflow to the first air inlet 323. The direction of the protrusion matches the direction of airflow, further reducing the suction resistance at the moment of startup. At the same time, the second part 3212 arches from the left and right sides towards the middle to form a cavity, so that the direction of convergence of the oil fume airflow (converging from the left and right sides towards the middle) matches the first intake 21 on the rear side (in the conventional fan arrangement, the fan intake is located in the middle or near the middle of the left and right sides). At the moment of startup, the first intake 21 and the first air inlet 323 are close to each other, and the oil fume gas can directly enter the first intake 21 on the rear side through the second part 3212 along the first air inlet 323. This greatly shortens the oil fume path, so that the oil fume can be quickly sucked in and discharged by the fan system 2, thereby improving the oil fume extraction efficiency.

[0045] The size of the second part 3212 affects the proportion of forward and backward flow of fumes after they reach the second part 3212. In this embodiment, if the axis X of the fan system 2 extends forward and backward, it can be horizontal or inclined in a relatively horizontal direction. The depth of the second housing 12 is B', and the vertical distance between the projection of the front end of the second part 3212 and the rear sidewall of the second housing 12 on the horizontal plane is B1', and B1' / B'≥1 / 2 is satisfied. This makes the size of the second part 3212 as large as possible, covering a larger area, so that when the fumes rise, a larger proportion of the fumes pass through the second part 3212 and flow upward under the guidance of the second part 3212. Compared with the first part 3211, which has a larger inclination, the fumes guided by the second part 3212 can help to reduce the tendency of the fumes to flow forward along the first part 3211 and increase the tendency to flow backward, thereby increasing the proportion of fumes inhaled from the rear main intake. More preferably, the axis X of the fan system 2 extends horizontally front to back. In this case, the width of the second part 3212 and the width of the fan system 2 can be compared. The width of the fan system 2 is B, and the vertical distance between the projection of the front end of the second part 3212 and the first suction port 21 on the horizontal plane is B1, and B1 / B ≥ 2 / 3 is satisfied.

[0046] The ridge 3213 of the second part 3212 gradually slopes downward from front to back, with an angle α between it and the horizontal plane. The inclination angle between the first part 3211 and the horizontal plane is β, and α < β. This further promotes the diversion of oil fumes at the second part 3212. Since the first ventilation component 32 is inclined from front to back as a whole, and the first intake 21, as the main intake, faces the rear, the forward guiding direction of the first ventilation component 32 will be contrary to the rear air intake of the first intake 21, which is not conducive to air intake. By setting the second part 3212, since its ridge 3213 does not participate in oil guiding, the inclination angle can be smaller than that of the first part 3211, as mentioned above. This reduces the overall inclination of the first ventilation component 32 from front to back, guides most of the oil fumes to the rear, and reduces the impact of the inclination on the forward guiding of oil fumes, which is conducive to most of the oil fumes being diverted to the rear and entering the first intake 21. Furthermore, the provision of the first air inlet 323 or the third ventilation hole 324 can further guide the airflow to the rear. In addition, the second part 3212 is integrally formed, and the end of its side portion 3214 away from the ridge portion 3213 is at a certain distance from the left or right end of the first part 3211. Compared with the shape of the second part 3212 extending directly from the ridge portion 3213 to the left and right side walls of the second housing 12, the shape of the second part 3212 of this utility model allows the side portion 3214 to have a greater inclination, which is beneficial for guiding the oil on the ridge portion 3213 and the side portion 3214 to the left and right sides. Optionally, the ridge 3213 can also gradually slope upward from front to back or extend horizontally from front to back, which will better facilitate the flow of oil fumes to the rear. In this case, the preferred slope angle is [0°, 65°], and more preferably, the slope angle is n°, where n is any integer value within (0, 65), or the slope angle is [0°, n°], where n is any integer value within (0, 65), or the slope angle is [n1°, n2°], where n1 and n2 are any integer values ​​within (0, 65). The side portion 3214 is inclined downward at an angle β' away from the ridge portion 3213. Along the direction from the second end 3216 of the first ventilation component body 321 to the first end 3215 (in this embodiment, from front to back), the side portion 3214 is inclined downward at an angle β”, and β' > β”. This ensures that when the oil flows onto the side portion 3214, it can flow to the left and right sides along the side portion 3214, avoiding direct backward flow which would cause some oil to still flow to the position corresponding to the center of the first suction port 21 of the fan system 2 and be blown up.

[0047] The first ventilation component 32 further includes a first mounting portion 325 for mounting the first ventilation component body 321 to the second housing 12. The first mounting portion 325 extends upward from the rear end of the first ventilation component body 321. The bottom of the first mounting portion 325 is recessed upward to form a second air inlet 326. The first air inlet 323 and the second air inlet 326 are connected to form an integral unit. The upper edge of the second air inlet 326 is arched from the left and right sides towards the middle. The apex 3252 of the upper edge of the second air inlet 326 corresponds to the ridge 3213 in the middle of the second part 3212 of the first ventilation component 32 (corresponding here means corresponding in the left and right direction). The minimum distance between the apex 3252 of the upper edge of the second air inlet 326 and the ridge 3213 of the first ventilation component 32 is d7. Similarly, to meet safety requirements and ensure sufficient flow area of ​​the second air inlet 326, d7 ≤ 50 mm.

[0048] The second part 3212, located at the edge of the first air inlet 323, has a first baffle 3219 formed therefrom, which is formed by bending the second part 3212 upwards. The first mounting part 325 has a forward-extending second baffle 3251 formed at the upper edge of the second air inlet 326.

[0049] The fan system 2 includes a volute 23, on which the aforementioned first intake 21 and second intake 22 are formed. An oil drip nozzle 24 is located at the lowest point of the volute 23. The first ventilation component body 321 of the first ventilation component 32 has a first end 3215 and a second end 3216 opposite each other in the front-rear direction. In this embodiment, since the fan system 2 is a rear-intake system, the first end 3215 is the rear end, and the second end 3216 is the front end. In a horizontal projection, the first intake 21 is located between the oil drip nozzle 24 and the first end 3215, and the first air inlet 323 is located between the oil drip nozzle 24 and the first end 3215. The second portion 3212 is located between the first air inlet 323 and the second end 3216 of the first ventilation component body 321.

[0050] In the horizontal projection, the second part 3212 covers the oil drip nozzle 24, and the position of the second part 3212 corresponding to the oil drip nozzle 24 is higher than the end of the second part 3212 near the first air inlet 323. Since the end of the volute 23 in the width direction also drips oil downwards, in the horizontal projection, the oil dripping part 231 corresponding to the end face of the volute 23 where the first suction port 21 is opened is located inside the second part 3212 to prevent the oil in the volute 23 from dripping vertically downwards at this point. In this embodiment, the oil dripping part 231 is the bottom of the end face of the volute 23; alternatively, it can also be an independent oil guiding component that is inclined forward and downward at the bottom of the end face.

[0051] Since the axis X of the fan system 2 extends in the front-to-back direction, the airflow speed is higher in the middle and lower on the left and right sides. If the oil is directly guided to the rear side, the higher airflow speed in the middle will cause the oil in the middle of the rear side to be blown up by the airflow and splash, which may then drip down onto the stovetop. Therefore, by setting up the raised second part 3212, the oil received is guided to the left and right sides of the rear part of the outer casing. The lower airflow speed guides the oil downward, preventing splashing, so that the oil can flow down the wall of the outer casing until it is collected in the oil cup 4.

[0052] Because the volute 23 is under positive pressure, a high-speed airflow will spray outward from the oil drip nozzle 24 at the bottom of the volute 23. In this case, if the first ventilation component 32 and the oil drip nozzle 24 are too close, the oil will splash laterally after dripping onto the first ventilation component 32. Since the first ventilation component 32 has openings and cannot block the splashing oil laterally, it will fail to collect the oil dripping from the fan system 2. Therefore, the portion of the first ventilation component body 321 of the first ventilation component 32 corresponding to the oil drip nozzle 24 is closed. The vertical distance between the oil drip nozzle 24 and the first ventilation component body 321 of the first ventilation component 32 is c, and c ≥ 8 mm. (See [reference]). Figure 13 .

[0053] The width of the oil drip nozzle 24 is d12 (the dimension in the front-to-back direction). The part of the first ventilation component body 321 of the first ventilation component 32 corresponding to the position of the oil drip nozzle 24 has a minimum closed area of ​​π(d12 / 2+ctanγ). 2 γ is the angle between the line connecting any point on the edge of the oil drip nozzle 24 and any point on the body of the first ventilation component 321 and the vertical direction, and satisfies γ≥30°. Here, it is assumed that the oil drip nozzle 24 is circular.

[0054] See also Figure 2 The first ventilation component 32 also includes a second mounting portion 327 that bends upward from the front side of the first ventilation component body 321. A fourth ventilation hole 3271 is provided on the second mounting portion 327, which is closed at the position corresponding to the front side of the drip nozzle 24, and the bottom of the closed position is not lower than the lower end of the drip nozzle 24. The flow area of ​​the first ventilation hole 322 of the first ventilation component 32 is larger than the flow area of ​​the fourth ventilation hole 3271 (the definition of flow area is as for the first ventilation hole 322).

[0055] A first oil drain hole 3217 is formed at the first end 3215 of the first ventilation component body 321. In the horizontal projection, the distance between the first oil drain hole 3217 and the ridge 3213 is d5 (measured at the midpoint of the ridge 3213 in the left-right direction), and d5 ≥ 50 mm. This ensures that the first oil drain hole 3217 maintains a sufficient distance from the middle position of the fan system 2 where the wind speed is high, thus avoiding the influence of high-speed airflow on the oil. There may be two first oil drain holes 3217, corresponding to the two side portions 3214 of the second part 3212. The side portion 3214 away from the ridge 3213 extends to the first end 3215 of the first ventilation component body 321, and the first oil drain hole 3217 may be formed at the transition position between the side portion 3214 and the first end 3215. On the vertical projection, the vertical distance between the axis X of the fan system 2 and the first oil leakage hole 3217 is h1. When h1≤350mm, the center of the first suction port 21 of the fan system 2 and the first oil leakage hole 3217 are relatively close. Therefore, the distance between them will have a significant impact on the oil. At this time, (d5+d4) / h1=tanθ, θ≥10°. When h1>350mm, θ is not required. This reduces the interference of airflow on the oil dripping path on both sides and prevents the oil from drifting towards the center.

[0056] The first end 3215 of the first ventilation component body 321 also has a second oil leakage hole 3218. The distance between the second oil leakage hole 3218 and the axis X of the fan system 2 is greater than the distance between the first oil leakage hole 3217 and the axis X of the fan system 2, so that the oil on the first part 3211 of the first ventilation component body 321 is guided downward.

[0057] The side portion 3214 also gradually slopes downward from front to back, and its tilt angle relative to the horizontal plane is also β, so as to promote the flow of oil on the ridge portion 3213 to the side portion 3214.

[0058] See Figure 11 and Figure 12 The oil cup 4 mentioned above corresponds to the first end 3215 of the first ventilation component body 321. The width dimension of the upper end of the open oil cup 4 in the front-back direction is d6. The distance between the first end 3215 of the first ventilation component body 321 and the rear side wall of the second housing 12 is d11. And in the second state, (d6-d11) / d5≥0.1, so that the oil can flow into the oil cup 4 and will not drift forward to outside the range of the oil cup 4.

[0059] A control panel 5 is provided on the front side of the first housing 11. When the first housing 11 is lowered, it can be lowered to a height of about 450mm above the stove. The range hood also includes a back panel 13, which is located on the rear side of the first housing 11. The horizontal distance from the front side of the smoke hood 6 to the back panel 13 is 345-350mm. The thickness of the smoke hood 6 is ≤50mm.

[0060] The term "fluid connectivity" as used in this utility model refers to the spatial relationship between two components or parts (hereinafter referred to as the first part and the second part, respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow from the first part along a flow path and / or be transported to the second part. This can be a direct connection between the first part and the second part, or an indirect connection between the first part and the second part through at least one third party. The third party can be a fluid channel such as a pipe, channel, conduit, guide, hole, or groove, or a chamber or combination thereof that allows fluid to flow through.

Claims

1. A range hood, comprising a housing and a fan system (2) disposed within the housing, the fan system (2) having an axis (X) extending in a front-rear direction, the fan system (2) including a rearwardly facing first intake (21); characterized in that: The outer casing or the bottom of the outer casing is provided with a first ventilation component (32) for receiving oil dripping from the fan system (2). The first ventilation component (32) includes a first ventilation component body (321) located below the fan system (2). The first ventilation component body (321) includes a first part (3211) and a second part (3212). The first part (3211) has a first ventilation hole (322). The second part (3212) has a ridge (3213) that protrudes upward relative to the first part (3211) and side parts (3214) located on the left and right sides of the ridge (3213). The side parts (3214) gradually slope downward away from the ridge (3213). The first ventilation hole (322) is distributed at least on the left and right sides of the second part (3212). On the horizontal projection, the distance between the axis (X) of the ridge (3213) and the fan system (2) is d4, and satisfies d4≤D / 2, where D is the diameter of the first inlet (21).

2. The range hood according to claim 1, characterized in that: The first ventilation component body (321) has a first end (3215) located at the rear and a second end (3216) located at the front. A first air inlet (323) is formed on the first ventilation component body (321). The first air inlet (323) is located between the second part (3212) and the first end (3215) of the first ventilation component body (321), and the end of the second part (3212) near the first air inlet (323) forms one side edge of the first air inlet (323).

3. The range hood according to claim 1, characterized in that: The first part (3211) gradually slopes downward from front to back, and the spine (3213) and the side part (3214) gradually slope downward from front to back respectively.

4. The range hood according to claim 1, characterized in that: The first end (3215) of the first ventilation component body (321) is provided with a first oil leakage hole (3217). On the horizontal plane projection, the distance between the first oil leakage hole (3217) and the axis (X) of the fan system (2) is d5, and d5≥50mm is satisfied.

5. The range hood according to claim 4, characterized in that: On the horizontal projection and on the vertical projection, the distance between the axis (X) of the fan system (2) and the first oil leakage hole (3217) is h1. When h1≤350mm, (d5+d4) / h1=tanθ, and θ≥10°.

6. The range hood according to claim 4, characterized in that: The first ventilation component body (321) has a first end (3215) located at the rear and a second end (3216) located at the front. The side (3214) of the second part (3212) of the first ventilation component body (321) extends from the side away from the ridge (3213) to the first end (3215) of the first ventilation component body (321). The first oil leakage hole (3217) is formed at the transition position between the side (3214) of the second part (3212) and the first end (3215) of the first ventilation component body (321).

7. The range hood according to claim 4, characterized in that: The first end (3215) of the first ventilation component body (321) is also provided with a second oil leakage hole (3218). The distance between the second oil leakage hole (3218) and the axis (X) of the fan system (2) is greater than the distance between the first oil leakage hole (3217) and the axis (X) of the fan system (2).

8. The range hood according to claim 1, characterized in that: The outer casing includes a first casing (11), a second casing (12), and a smoke hood (6) disposed at the bottom of the first casing (11). A smoke inlet (62) is formed on the smoke hood (6). The first casing (11) at least partially covers the outer periphery of the second casing (12) and is at least partially located below the second casing (12). The first casing (11) can be raised and lowered relative to the second casing (12). A first ventilation component (32) is disposed on the second casing (12). A second ventilation component (31) is disposed at the smoke inlet (62).

9. The range hood according to any one of claims 1 to 8, characterized in that: The fan system (2) further includes a second intake port (22) facing forward, the first intake port (21) is the main intake port, the front-to-back depth of the portion of the housing containing the fan system (2) is B', the vertical distance between the projection of the front end of the second portion (3212) and the rear sidewall of the portion of the housing containing the fan system (2) on the horizontal plane is B1', and B1' / B'≥1 / 2 is satisfied.

10. The range hood according to any one of claims 1 to 8, characterized in that: The fan system (2) also includes a second intake port (22) facing forward, the first intake port (21) is the main intake port, the axis (X) of the fan system (2) extends horizontally front to back, the width of the fan system (2) is B, the vertical distance between the front end of the second part (3212) and the projection of the first intake port (21) on the horizontal plane is B1, and B1 / B≥2 / 3 is satisfied.

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