Range hood

Abstract

The utility model relates to a range hood, which comprises a casing, the oil cup assembly comprises two oil cups which are sequentially arranged in the left-right direction, and the two oil cups are both arranged at the bottom of the machine shell; the machine shell comprises an oil guide plate, and the oil guide plate comprises a front plate body which is located on the front side and vertically arranged and a lower extending plate which is bent and extends backwards from the bottom of the front plate body. A first oil guiding structure used for guiding oil on the front plate body to the left side and the right side is arranged at the area position, corresponding to the joint position of the two oil cups, of the front plate body. A second oil guiding structure used for guiding oil on the lower extending plate to the left side and the right side is formed in the area position, corresponding to the joint position of the two oil cups, of the lower extending plate. The oil cup has the advantages that oil liquid can be effectively prevented from dripping or diffusing to the seam between the adjacent oil cups, so that the cleanliness of the end parts or the surfaces of the oil cups is kept.

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] A range hood is a kitchen appliance used to purify the kitchen environment. Currently, most range hoods are around 900mm wide, with some models even reaching 1000mm. This necessitates a matching oil cup width of 900-1000mm. Most household range hoods on the market use a single oil cup, which is inconvenient to handle, especially when full of oil, and prone to spillage. An excessively long oil cup also makes cleaning difficult.

[0003] To address this, Chinese utility model patent application CN202323052087.0 discloses a range hood, including a main body and at least two oil collection components mounted on the main body. Each oil collection component is equipped with a connector. The main body of the range hood has multiple mounting components, the number of which is the same as the number of connectors and corresponds one-to-one. Each connector connects to a corresponding mounting component, and adjacent mounting components are symmetrical. The design employs multiple separate oil cups in the left-right direction, allowing for easy removal and dishwasher cleaning. However, this oil cup mounting structure design has certain problems. This solution cannot solve the risk of oil dripping from the gaps between the two / multiple oil cups. After the range hood has been working for a period of time, oil droplets will condense on the surfaces of various parts in contact with the fumes, or diffuse from adjacent parts, accumulating in the middle and bottom of the range hood casing. These droplets will then drip or spread onto the oil cup hooks and the outer wall of the oil cups, ultimately dripping onto the user's countertop, reducing the user experience.

[0004] Therefore, existing range hoods still need further improvement. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a range hood that can effectively prevent oil from dripping or spreading to the joint between adjacent oil cups, thereby maintaining the cleanliness of the end or surface of the oil cup, in light of the current state of the technology.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a range hood, comprising:

[0007] chassis;

[0008] The oil cup assembly includes two oil cups arranged sequentially in the left-right direction, both of which are located at the bottom of the housing;

[0009] The shell comprises an oil guide plate, which comprises a front plate body arranged vertically on the front side and a lower extension plate extending rearward from the bottom of the front plate body, a first oil guide structure for guiding the oil on the front plate body to the left and right sides is arranged on the front plate body at a position corresponding to the position where the two oil cups are connected, and a second oil guide structure for guiding the oil on the lower extension plate to the left and right sides is arranged on the lower extension plate at a position corresponding to the position where the two oil cups are connected.

[0010] The "vertical arrangement" in the above-mentioned "vertically arranged front plate body" can mean extending arrangement in the vertical direction, or can mean that the front plate body has a certain inclination angle, such as 0-45°, relative to the vertical direction.

[0011] The above-mentioned first oil guide structure and second oil guide structure can adopt a "groove type flow guide structure", such as a V-shaped groove arranged longitudinally or radially on the oil guide plate, which guides the oil droplets to flow to the left and right sides by surface tension, or can adopt a "protrusion type flow guide structure", such as a corresponding protrusion or raised profile provided on the oil guide plate, which causes the oil to flow to the left and right sides under the action of its own gravity, in addition to which other oil guide structures can also be adopted, such as a siphon type oil guide channel provided on the surface of the oil guide plate or surface coating treatment, wherein the siphon type oil guide channel can be a capillary gap with a width of 1-2 mm provided on the oil guide plate, which actively sucks the stagnant oil droplets by siphon effect, and the surface coating treatment can be to provide an oleophobic coating on the middle region and an oleophilic coating on the adjacent left and right regions, thereby guiding the oil to flow to the left and right sides.

[0012] For the above-mentioned "groove type flow guide" or "protrusion type flow guide" oil guide structure, considering that the design of the oil guide plate is complex or the shape is unreasonable, resulting in an unsmooth oil flow path, as an improvement, a first oil guide profile is formed by recessing the lower part of the front plate body towards the inside of the shell, the first oil guide profile is a triangular profile structure with a narrow top and a wide bottom as a whole, the first oil guide profile constitutes the first oil guide structure, and a second oil guide profile is formed by recessing the lower extension plate towards the inside of the shell, the second oil guide profile constitutes the second oil guide structure. The use of the profile structure on the oil guide plate simplifies the manufacturing process, optimizes the oil flow direction, improves the flow efficiency and structural reliability.

[0013] In order to simplify the structure and further facilitate processing, as an improvement, the front part of the second oil guide profile is connected to the bottom part of the first oil guide profile, thereby forming a complete profile structure, and the lowest position of the complete profile structure is higher than the bottom surface of the main body of the lower extension plate. The seamless connection of the first and second oil guide profiles forms a complete profile structure, and the lowest position is higher than the bottom surface of the lower extension plate, which avoids oil stagnation and ensures that the oil flows completely into the oil cup.

[0014] In view of the fact that the improper inclination angle of the second oil guiding pressure type of the oil guiding plate can cause oil backflow or insufficient flow rate, the second oil guiding pressure type is inclined upward from front to back relative to the horizontal plane as a whole.

[0015] As an improvement, the included angle formed by the second oil guiding pressure type relative to the horizontal plane is denoted as A1, and the value range of A1 is 2°<A1<15°. The inclination angle (2°<A1<15°) of the second oil guiding pressure type is optimized to accelerate the flow of oil by gravity, prevent backflow, and avoid splashing caused by excessive flow rate.

[0016] In view of the fact that the sharp edges or unsmooth transitions of the oil guiding structure can cause oil residue or cleaning difficulty, the left and right sides of the second oil guiding pressure type are smoothly connected to the main body of the lower extension plate. The smooth transition connection design reduces oil adhesion, facilitates cleaning, and improves user experience.

[0017] The front plate body of the oil guiding plate can be vertically arranged or inclined, preferably, the front plate body of the oil guiding plate is inclined downward from top to bottom.

[0018] The oil guiding plate formed by the above-mentioned front plate body and lower extension plate can be independent of the air inlet plate, but in order to facilitate processing, the oil guiding plate further comprises an air inlet plate inclined and extended forward and upward from the top of the front plate body, the air inlet plate is provided with an air inlet, and the machine shell is provided with a centrifugal fan, and the air inlet port of the centrifugal fan is connected to the air inlet of the air inlet plate.

[0019] In order to facilitate oil guiding on the rear side of the machine shell, the machine shell further comprises a vertically extending rear side plate, the bottom of the rear side plate is provided with a bent plate folded and extended forward, the bent plate is located above the lower extension plate and the projections of the two in the vertical direction overlap. The bent plate of the rear side plate of the machine shell and the third oil guiding pressure type overlap in the vertical direction, covering the rear side area, and further improving the comprehensiveness of oil collection.

[0020] In order to avoid the spread of oil caused by the contact between the bent plate and the second oil guiding pressure type, a third oil guiding pressure type is formed on the area of the bent plate corresponding to the second oil guiding pressure type, the third oil guiding pressure type is inclined upward from front to back relative to the horizontal plane as a whole, and has a third gap in the vertical direction with the second oil guiding pressure type.

[0021] In order to guide the oil collected on the inner side of the panel into the left and right oil cups, the machine shell further comprises a panel located on the front side of the oil guiding plate, the vertical projection of the lower edge of the panel falls in the oil cup, and a fourth oil guiding structure for guiding the oil on the panel to the left and right sides is formed on the area of the inner bottom of the panel corresponding to the position where the two oil cups are connected.

[0022] The fourth oil guiding structure can be formed by changing the structure of the panel itself, such as setting corresponding protrusions or recesses. However, considering that the panel is usually a glass plate, the fourth oil guiding structure is a foam oil separating piece attached to the back of the panel. The foam oil separating piece is triangular in shape, with the bottom of the foam oil separating piece flush with the bottom edge of the panel. The foam oil separating piece (the fourth oil guiding structure) adsorbs and guides the oil on the panel to the oil cup, keeps the panel clean, and simplifies maintenance.

[0023] As an improvement, a first mounting frame is arranged at the bottom of the lower extension plate of the oil guiding plate. The two ends of the two adjacent oil cups are provided with first connecting parts, and the first mounting frame is provided with two first hanging parts for hanging the first connecting parts of the two oil cups, respectively. The first mounting frame includes a hanging plate and two mounting plates extending leftward and rightward from the hanging plate. The two mounting plates are connected to the bottom of the cabinet, and the two first hanging parts are arranged on the hanging plate. The two mounting frames are also provided with oil blocking structures for blocking the flow of oil from the mounting plates to the hanging plate. Through the separation design of the hanging plate and the mounting plate and the oil blocking structure, the oil flow path is effectively blocked, avoiding the spread of oil on the cabinet from the mounting plate to the junction position of the hanging plate and the first connecting part of the oil cup, ensuring the cleanliness of the outer surface of the oil cup and the first hanging part, and improving the user experience.

[0024] In order to simplify the above-mentioned oil blocking structure and facilitate processing, while adapting to different mounting plate shapes, the mounting plate or the hanging plate or the position where the mounting plate and the hanging plate meet has a downward protruding oil blocking protrusion or an upward recessed oil blocking groove. The above-mentioned oil blocking protrusion or oil blocking groove directly intercepts the flow of oil through physical barriers, without complex processes, low cost and strong adaptability. The above-mentioned oil blocking protrusion or oil blocking groove extends in the front-rear direction, thereby being able to block the flow or spread of oil in the left-right direction. It is conceivable that, in addition to the above-mentioned oil blocking protrusion and oil blocking groove, the oil blocking structure can also use: 1. V-shaped, U-shaped or wavy microgrooves (0.5-2mm wide, 0.3-1mm deep) are processed on the surface of the first mounting frame, and are arranged in the direction of oil smoke flow. The capillary effect is used to guide the flow of liquid oil along the groove to the oil cup, avoiding the spread of the oil film. 2. An oil-repellent and oil-attractive gradient coating is arranged on the first mounting frame, that is, a stepped surface treatment is adopted, such as: an oil-repellent coating is sprayed on the hanging plate, especially in the area adjacent to the first hanging part, while an oil-attractive coating (such as titanium oxide) is used near the mounting plate. The coating is realized by screen printing or plasma spraying process. Among them, the oil-repellent area can reduce the adhesion of oil stains, the oil-attractive area can accelerate the condensation of oil droplets and flow downward, and the gradient design can form a "repulsion-attraction" synergistic effect.

[0025] In view of the fact that oil may accumulate in the contact area between the hanging plate and the bottom of the casing, causing the oil to spread onto the oil cup, a first gap is provided between the hanging plate and the bottom of the lower extension plate.

[0026] To form the first gap, the hanging plate can be concave downward or the bottom of the casing can be concave upward, but to avoid the hanging plate from protruding or bulging downward too much, the lower extension plate is concave upward at the position opposite to the hanging plate, so that the first gap is formed between the hanging plate and the concave upward area of the bottom of the lower extension plate.

[0027] Compared with the prior art, the utility model has the advantages that: the utility model discloses a first oil guide structure is arranged at the joint area between the front plate body and the oil cup, and a second oil guide structure is arranged at the corresponding position of the lower extension plate, a double oil guide path is innovatively constructed, and the technical problem that oil easily drips to the joint in the design of the traditional double oil cup is effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the range hood of the embodiment of the utility model;

[0029] Figure 2 It is a schematic diagram of the three-dimensional structure of the range hood of the embodiment of the utility model, and the oil cup is in a separated state;

[0030] Figure 3 It is a vertical sectional view of the range hood of the embodiment of the utility model along the left-right direction;

[0031] Figure 4 It is a schematic diagram of the three-dimensional structure of the range hood of the embodiment of the utility model after the oil cup is removed, and the first mounting frame and the second mounting frame on the right are in a separated state;

[0032] Figure 5 It is a schematic diagram of the three-dimensional structure of the first mounting frame of the embodiment of the utility model;

[0033] Figure 6It is another angle of the first mounting frame of the embodiment of the utility model and shows a three-dimensional structure.

[0034] Figure 7 It is the vertical section view of the first mounting frame of the embodiment of the utility model along the front and back direction.

[0035] Figure 8 It is the right view of the second mounting frame of the right side of the embodiment of the utility model.

[0036] Figure 9 It is the three-dimensional structure of the second mounting frame of the right side of the embodiment of the utility model and shows a schematic diagram.

[0037] Figure 10 It is the vertical section view of the range hood of the embodiment of the utility model along the front and back direction.

[0038] Figure 11 It is the front angle of the oil guide plate of the range hood of the embodiment of the utility model and shows a three-dimensional structure.

[0039] Figure 12 It is the back angle of the oil guide plate of the range hood of the embodiment of the utility model and shows a three-dimensional structure.

[0040] Figure 13 It is the vertical section view of the oil guide plate of the embodiment of the utility model along the front and back direction.

[0041] Figure 14 It is the three-dimensional structure of the panel of the range hood of the embodiment of the utility model and shows a schematic diagram. DETAILED DESCRIPTION

[0042] The utility model will be described in further detail below in combination with the embodiment of the drawings.

[0043] In the description and claims of the utility model, directional terms such as "front", "back", "up", "down", "left", "right", "side", "top", "bottom" are used to describe various example structural parts and elements of the utility model, but these terms are used only for the convenience of description and are determined based on the example orientation shown in the drawings. Since the disclosed embodiments of the utility model can be arranged in different directions, these directional terms are only for illustration and should not be considered as limitation, for example, "up" and "down" are not necessarily limited to the direction opposite or consistent with the direction of gravity.

[0044] Figures 1-14 A preferred embodiment of the range hood of the utility model is shown.

[0045] The range hood comprises a casing 10 and a centrifugal fan arranged in the casing 10. An air inlet 14 is formed in a front side wall of the casing 10, through which external smoke can enter the casing 10. The centrifugal fan generates negative pressure when operating, and external oil fume can be sucked into the casing 10 through the air inlet 14. An oil screen is arranged at the air inlet 14 of the casing 10 for filtering oil fume. An oil cup assembly is arranged at the bottom of the casing 10 for receiving oil stains flowing down from the smoke collecting cover. In order to facilitate cleaning and disassembly, the oil cup assembly comprises two oil cups 2 arranged in sequence from left to right, and each of the two oil cups 2 is a long strip extending from left to right. A smoke baffle 15 capable of deflecting forward and backward relative to the smoke collecting cover is arranged at the front of the casing 10. The smoke baffle 15 is connected to the main body of the casing 10 through a hinge movement mechanism, and can specifically deflect forward to open the air inlet 14 and deflect backward to block the air inlet 14. The hinge movement mechanism for driving the smoke baffle 15 to deflect can adopt a conventional hinge movement mechanism in the prior art, which will not be described here.

[0046] Referring to Figures 1-3 The range hood of the embodiment further comprises an oil cup mounting structure, which comprises the oil cup assembly, a first mounting rack 3 and a second mounting rack 4. The oil cup assembly comprises two (or three or more) oil cups 2 arranged side by side in the left-right direction, and the adjacent ends of the two oil cups 2 are respectively provided with first connecting portions 21, which are specifically first insertion pieces extending forward and backward. The distal ends of the two oil cups 2 are respectively provided with second connecting portions 22, which are also second insertion pieces extending forward and backward.

[0047] Referring to Figures 4-7 The first mounting rack 3 is fixed to the central region of the bottom of the casing 10 of the range hood, and comprises a hanging plate 31 and mounting plates 32 extending from the left and right sides of the hanging plate 31. The two mounting plates 32 are connected to the bottom of the casing 10 by screws (or rivets, welding, etc.). The bottom of the hanging plate 31 is provided with two first hanging portions 311, which are specifically two first mounting grooves 312 extending forward and backward, and the side portions of the two first mounting grooves 312 are open opposite to each other and are spaced apart in the left-right direction. The front end of each first mounting groove 312 is provided with a first mounting opening 314 for the first insertion piece of the oil cup 2 to slide from front to back.

[0048] The first installation groove 312 of the hanging plate 31 is formed by bending the edge, specifically, the left and right sides of the hanging plate 31 extend downward and outward to form a first bending edge 313a and a second bending edge 313b, and the first installation groove 312 is formed between the two bending edges and the main body of the hanging plate 31. This structure does not require additional welding or processing of the groove, simplifying the manufacturing process. The height of the main body of the hanging plate 31 is slightly higher than the height of the mounting plate 32, and the bottom surface of the bending edge of the hanging plate 31 is flush with or slightly lower than the bottom surface of the mounting plate 32, thereby avoiding the first installation groove 312 being too low and ensuring that the oil cup 2 can be as close as possible to the casing 10, improving the appearance.

[0049] The bending edge of the first mounting frame 3 can be formed by stamping, which forms an opening or gap in the area where the bending edge of the hanging plate 31 is located. The steel plate can be welded above the opening or gap of the hanging plate 31 to ensure user convenience (guidance), and the upper surface of the entire hanging plate 31 can be sealed to prevent a small amount of oil from dripping from the outer surface of the casing 10.

[0050] The first gap 34 is formed between the hanging plate 31 of the first mounting frame 3 and the corresponding area of the bottom of the casing 10, and the gap is recessed upward by the corresponding area of the bottom of the casing 10. The recessed depth is 2mm. By setting the first gap 34, the hanging plate 31 of the first mounting frame 3 can avoid contacting the corresponding area of the bottom of the casing 10, thereby preventing oil from flowing along the mounting plate 32 to the hanging plate 31.

[0051] The mounting plate 32 of the first mounting frame 3 also has an upwardly recessed oil-blocking groove at the junction with the hanging plate 31, which extends continuously in the front-rear direction. The oil-blocking groove constitutes an oil-blocking structure 33 for blocking or intercepting the spread of oil from the bottom of the casing 10 along the surface of the mounting plate 32 to the hanging plate 31.

[0052] The area where the first installation port 314 of the first installation groove 312 of the hanging plate 31 is located (i.e., the top surface of the transverse portion of the bending edge) forms a first guide slope 3140 that gradually slopes downward from the rear to the front, and the included angle α with the horizontal plane is in the range of 2°<α<90°, preferably 5°. The design of the first guide slope 3140 facilitates the sliding of the first tab of the oil cup 2 into the first installation groove 312, improving the installation efficiency of the oil cup 2.

[0053] Continuing to refer to Figure 4 The casing 10 of the present embodiment includes left and right side plates 11 and a main housing 12 between the two side plates 11. The first mounting frame 3 is arranged at the middle of the bottom of the main housing 12, and the two second mounting frames 4 are arranged at the bottom of the two side plates 11, which can be fixed by screws, rivets, welding, etc.

[0054] In the present embodiment, a gap is reserved between the bottom of the two side plates 11 of the casing 10 and the bottom of the main casing 12 in the left-right direction (e.g. an open slot is provided), so that the second mounting rack 4 connected to the bottom of the two side plates 11 has a second gap 13 with the main casing 12. The installation position of the second mounting rack 4 of the oil cup 2 and the bottom of the main casing 12 of the casing 10 are kept at a second gap 13 of at least 1 mm, which can prevent oil droplets from spreading to the second mounting rack 4 of the left and right oil cups 2.

[0055] Referring to Figure 8 and Figure 9 , the two second mounting racks 4 are left-right symmetrical. Each second mounting rack 4 is provided with a second hanging part 41, which is a second mounting slot 42 extending in front and back directions, with the side part open outward, i.e. the side part of the second mounting slot 42 of the left second mounting rack 4 is open to the left, and the side part of the second mounting slot 42 of the right second mounting rack 4 is open to the right. Similar to the formation of the first mounting slot 312 of the first mounting rack 3, the two second mounting racks 4 also correspondingly have a third bending edge 410 extending downward and then bending to the left or right side, which corresponds to the bottom wall of the side plate 11 of the casing 10 to form the above-mentioned second mounting slot 42. The front end of the second mounting slot 42 of the two second mounting racks 4 is provided with a second mounting port 43, and a second guide inclined surface 430 is formed, which gradually inclines downward from back to front, for guiding the second tab of the oil cup 2 to slide in. The angle between the second guide inclined surface 430 and the horizontal plane is β, and the value of β is in the range of 2°<β<90°, preferably 5°.

[0056] In order to enable the first tab and the second tab of the oil cup 2 to be assembled to the specified positions on the corresponding first mounting rack 3 and second mounting rack 4, a limiting press type 40 is provided at the rear end of the first mounting slot 312 of the first mounting rack 3 and the second mounting slot 42 of the second mounting rack 4, the thickness of the tab of the oil cup 2 is denoted as d, and the gap between the press type surface of the limiting press type 40 and the bearing surface of the corresponding tab of the oil cup 2 is less than 0.8d, and in the present embodiment, it is preferably 0.5d.

[0057] The first mounting rack 3 for mounting on the casing 10 includes a hanging plate 31 and two mounting plates 32 connected to the bottom of the casing 10, and the hanging plate 31 is provided with two first hanging parts 311 for hanging the oil cup 2. Through the separate design of the hanging plate 31 and the mounting plate 32 and the oil blocking structure 33, the oil flow path is effectively blocked, which avoids the spread of oil on the casing 10 from the mounting plate 32 to the joint position of the first connecting part 21 of the hanging plate 31 and the oil cup 2, ensures the cleanliness of the outer surface of the oil cup 2 and the first hanging part 311, and improves the user experience.

[0058] Referring to Figure 10The main shell 12 of the casing 10 comprises a top plate, a rear side plate 18 and a face plate 17. The interior of the main shell 12 is further provided with an oil guide plate 16, and the face plate 17 is located at the front side of the oil guide plate 16. The oil guide plate 16 is integrally formed by a front plate body 161, an extension plate 162 and an air inlet plate 163, and the material can be a stainless steel stamping part.

[0059] The air inlet plate 163 of the oil guide plate 16 is inclined rearward from top to bottom as a whole, and the front plate body 161 is also inclined rearward from top to bottom. The inclination angle between the air inlet plate 163 and the vertical direction is smaller than the inclination angle between the front plate body 161 and the vertical direction. The middle part of the air inlet plate 163 of the oil guide plate 16 is recessed rearward relative to the surrounding, thereby forming a smoke collection cavity. The face plate 17 is inclined rearward from top to bottom as a whole, and the inclination angle between the face plate 17 and the vertical direction is larger than the inclination angle between the air inlet plate 163 and the vertical direction.

[0060] The lower part of the oil guide plate 16 is the front plate body 161, which is formed by a stamping process to form a first oil guide profile 1610. The first oil guide profile 1610 is a triangular profile structure with a narrow top and a wide bottom, which is recessed inwardly toward the casing 10, and is used to divert the oil condensed on the surface of the front plate body 161 to the left and right sides. The included angle of the triangular edge at the top of the triangular profile structure is less than 120 degrees, and preferably 70 degrees. In addition, the included angle between the main body of the lower plate body and the horizontal plane is denoted as A3, and the included angle between the first oil guide profile 1610 and the horizontal plane as a whole is denoted as A4, wherein A3≤A4, which will be described in detail below. Figure 13 .

[0061] Referring to Figure 10 The extension plate 162 is bent and extended rearward from the bottom of the front plate body 161. The middle part of the extension plate 162 (i.e. the position corresponding to the region adjacent to the two oil cups 2) is formed by a stamping process to form a second oil guide profile 1620. The front part of the second oil guide profile 1620 seamlessly connects with the bottom of the first oil guide profile 1610 to form a complete profile structure. Thus, the hanging plate 31 of the first mounting bracket 3 provided on the extension plate 162 forms the first gap 34 with the region where the second oil guide profile 1620 is located. The second oil guide profile 1620 is inclined upward from front to back relative to the horizontal plane, and the included angle between the second oil guide profile 1620 and the horizontal plane is denoted as A1, which is in the range of 2°<A1<15°, and preferably 5°. The left and right sides of the second oil guide profile 1620 smoothly transition with the main body of the extension plate 162 to avoid oil residue. The lowest point of the profile structure (i.e. the position connected with the first oil guide profile 1610) is higher than the bottom surface of the extension plate 162, which ensures that the hanging plate 31 of the first mounting bracket 3 does not contact the second oil guide profile 1620.

[0062] The rear side plate 18 of the casing 10 extends vertically, and the bottom thereof is folded forward to form a bent plate 181 which overlaps the upper and lower projections of the lower extension plate 162. The middle part of the bent plate 181 (i.e. the position opposite to the second oil guide pressure type 1620) is punched toward the inside of the casing 10 to form a third oil guide pressure type 1811, and the third gap 19 is formed between the second oil guide pressure type 1620 and the third oil guide pressure type 1811 in the up-and-down direction to prevent the oil from contacting and spreading. The third oil guide pressure type 1811 is also inclined upward from front to back relative to the horizontal plane as a whole, and the included angle formed between the third oil guide pressure type 1811 and the horizontal plane is denoted as A2, A2 is smaller than A1, specifically, A2 > 1.5°, and preferably 2°.

[0063] Referring to Figure 14 The main body of the face plate 17 is made of tempered glass, and is installed on the front side of the oil guide plate 16, and the lower edge thereof is projected into the oil cup 2. The back surface of the face plate 17 is attached with a foam oil separation piece 171 near the lower edge, the oil separation piece 171 is made of polyurethane foam, and has a triangular shape with a narrow upper part and a wide lower part, and the bottom thereof is flush with the bottom edge of the face plate 17, and is used to absorb the oil inside the face plate 17 and guide the oil to the left and right oil cups 2.

[0064] The air inlet plate 163 is provided with a circular air inlet 14, and a centrifugal fan is installed inside the casing 10, and the air inlet port of the centrifugal fan is connected with the air inlet plate 163. The upper part of the face plate 17 is arranged with left and right extending air suction ports. When the centrifugal fan is started, the oil fume enters into the casing 10 through the air suction ports, and then is sucked through the air inlet 14, and the oil drops condensed on the surfaces of the oil guide plate 16 and the face plate 17 are separated and guided to the left and right oil cups 2 by the first oil guide structure, the second oil guide structure and the foam oil separation piece 171, so as to avoid the oil drops from dropping at the joint of the double oil cups 2.

[0065] Considering that the oil dripping hole on the volute of the centrifugal fan is located at the middle position of the machine body, a large amount of oil will accumulate and drop from the oil leakage hole during the operation of the range hood, and the oil will accumulate at the middle position of the bottom of the oil guide plate 16. In order to prevent the oil from accumulating / spreading to the gap, an oil leakage hole 1621 is formed at the front end of each of the left and right sides of the oil guide plate 16. Due to the rotation of the impeller, the oil dripping hole on the volute will have an outward jet flow, which pushes the oil drops to flow to the left and right oil leakage holes and drop into the inner cavity of the oil cup 2, thereby avoiding the accumulation inside.

[0066] On the basis of the above embodiments, other embodiments can be obtained by replacing and improving the related technical features. For example, the oil blocking structure 33 on the first mounting rack 3 can be a V-shaped micro groove (width 1 mm, depth 0.5 mm) machined on the surface of the hanging plate 31 and arranged in parallel along the front and rear directions, in addition to the oil blocking groove or oil blocking convex rib structure described above. The micro groove guides the oil along the groove to the inside of the oil cup 2 through capillary effect, avoiding the lateral diffusion of the oil film. Alternatively, the area adjacent to the first mounting groove 312 of the hanging plate 31 is sprayed with a super-oleophobic coating (contact angle > 150°), and the surface of the mounting plate 32 is coated with an oleophilic coating (titanium oxide), forming an oleophobic-oleophilic gradient. The "repulsion-attraction" effect accelerates the aggregation and directional flow of oil droplets. For another example, the oil cup assembly of the present embodiment is not limited to two oil cups 2, and the oil cup assembly can be expanded to three oil cups 2, corresponding to two first mounting racks 3. Two first mounting grooves 312 are provided on the hanging plate 31 of each first mounting rack 3, and the end portions of adjacent oil cups 2 are hung on the same mounting rack by the insertion piece. For another example, in addition to the "groove type flow guide structure" or "convex type flow guide structure" in the above embodiments, the first and second oil guiding structures can also be: a siphon type oil guiding channel is provided on the surface of the oil guiding plate, or the surface is coated, wherein the siphon type oil guiding channel can be a capillary gap with a width of 1-2 mm provided on the oil guiding plate, which actively sucks the trapped oil droplets by siphon effect; the surface coating treatment can be to provide an oleophobic coating in the middle region and an oleophilic coating in the adjacent left and right regions, thereby guiding the oil to flow to the left and right sides.

Claims

1. A range hood, comprising: a casing (10); an oil cup assembly comprising two oil cups (2) arranged in sequence in left and right directions, both of the oil cups (2) being arranged at the bottom of the casing (10); characterized in that the casing (10) comprises an oil guide plate (16), the oil guide plate (16) comprising a front plate body (161) arranged vertically at the front side and a lower extension plate (162) extending rearwardly from the bottom of the front plate body (161), a first oil guide structure for guiding oil on the front plate body (161) to the left and right sides being formed at a region of the front plate body (161) corresponding to the position where the two oil cups (2) are connected, and a second oil guide structure for guiding oil on the lower extension plate (162) to the left and right sides being formed at a region of the lower extension plate (162) corresponding to the position where the two oil cups (2) are connected.

2. The hood according to claim 1, characterized in that: A first oil guide pressing pattern (1610) is formed by locally recessing the lower part of the front plate body (161) inwardly into the casing (10), the first oil guide pressing pattern (1610) being a triangular pressing pattern structure with a narrow upper part and a wide lower part as a whole, the first oil guide pressing pattern (1610) constituting the first oil guide structure, and a second oil guide pressing pattern (1620) is formed by recessing the lower extension plate (162) inwardly into the casing (10), the second oil guide pressing pattern (1620) constituting the second oil guide structure.

3. The hood according to claim 2, characterized in that: The front part of the second oil guide pressing pattern (1620) is connected to the bottom of the first oil guide pressing pattern (1610), thereby constituting a complete pressing pattern structure, the lowest position of the complete pressing pattern structure being higher than the bottom surface of the main body of the lower extension plate (162).

4. The hood according to claim 2, characterized in that: The second oil guide pressing pattern (1620) is inclined upwardly from front to back relative to the horizontal plane as a whole.

5. The hood according to claim 4, characterized in that: An included angle A1 formed by the second oil guide pressing pattern (1620) relative to the horizontal plane is 2° < A1 < 15°.

6. The hood according to claim 2, characterized in that: The left and right sides of the second oil guide pressing pattern (1620) are smoothly connected to the main body of the lower extension plate (162).

7. The hood according to claim 1, characterized in that: The front plate body (161) of the oil guide plate (16) is inclined rearwardly from top to bottom.

8. The hood according to claim 7, characterized in that: The oil guide plate (16) further comprises an air inlet plate (163) extending forwardly and upwardly from the top of the front plate body (161), an air inlet (14) being formed in the air inlet plate (163), and a centrifugal fan being arranged in the casing (10) and having an air inlet port connected to the air inlet (14) of the air inlet plate (163).

9. The hood according to claim 2, characterized in that: The casing (10) further comprises a rear side plate (18) extending vertically, the bottom of the rear side plate (18) having a bent plate (181) extending forwardly and upwardly, the bent plate (181) being arranged above the lower extension plate (162) and the projections of the bent plate (181) and the lower extension plate (162) in the vertical direction overlapping.

10. The hood according to claim 9, characterized in that: The area on the bending plate (181) corresponding to the second oil guiding pattern (1620) is recessed inwardly towards the casing (10) and forms a third oil guiding pattern (1811), which is inclined upward from front to back in the horizontal direction as a whole and has a third gap (19) with the second oil guiding pattern (1620) in the vertical direction.

11. The hood according to claim 1, characterized in that: The casing (10) further comprises a panel (17) on the front side of the oil guiding plate (16), the lower edge of the panel (17) is projected onto the oil cup (2) in the vertical direction, and a fourth oil guiding structure is formed on the inner bottom of the panel (17) at a position corresponding to the position where the two oil cups (2) are connected.

12. The hood according to claim 11, characterized in that: The fourth oil guiding structure is a foam oil separating piece (171) attached to the back of the panel (17), which is triangular in shape with a narrow top and a wide bottom, and the bottom of the foam oil separating piece (171) is flush with the bottom edge of the panel (17).

13. The hood according to any one of claims 1-12, characterized in that: A first mounting bracket (3) is further provided on the bottom of the lower extension plate (162) of the oil guiding plate (16), and the two ends of the two oil cups (2) are provided with first connecting parts (21), the first mounting bracket (3) has two first hanging parts (311) for hanging the first connecting parts (21) of the two oil cups (2) respectively, and the first mounting bracket (3) comprises a hanging plate (31) and two mounting plates (32) extending to the left and right sides from the hanging plate (31), the two mounting plates (32) are connected to the bottom of the casing (10), the two first hanging parts (311) are provided on the hanging plate (31), and the two mounting brackets are further provided with oil blocking structures (33) for blocking the flow of oil from the mounting plates (32) to the hanging plate (31).

14. The hood according to claim 13, characterized in that: The mounting plate (32) or the hanging plate (31) or the position where the mounting plate (32) and the hanging plate (31) are connected has a downward protruding blocking rib or an upward recessed oil blocking groove, which constitutes the oil blocking structure (33).

15. The hood according to claim 14, characterized in that: The hanging plate (31) and the bottom of the lower extension plate (162) have a first gap (34).

16. The hood according to claim 15, characterized in that: The lower extension plate (162) is recessed upward at a position opposite to the hanging plate (31), so that the first gap (34) is formed between the hanging plate (31) and the upward recessed area of the bottom of the lower extension plate (162). The lower extension plate (162) is recessed upward at a position opposite to the hanging plate (31), so that the first gap (34) is formed between the hanging plate (31) and the upward recessed area of the bottom of the lower extension plate (162).

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