Range hood

Abstract

The present invention provides a range hood, which relates to the technical field of kitchen appliances. The range hood includes a smoke collecting component, an oil cup component and a staggered smoke inlet component; the smoke collecting component includes a smoke collecting hood; the oil cup component is located below the smoke collecting hood; the staggered smoke inlet component is installed between the smoke collecting hood and the oil cup component and is located on the left and right sides of the smoke collecting hood. The staggered smoke inlet component includes a first oil screen and a second oil screen, and the first oil screen and the second oil screen move relative to each other to change the overall length between the first oil screen and the second oil screen; when the oil cup component moves close to the smoke collecting hood, it is used to drive the staggered smoke inlet component to retract into the smoke collecting hood. It solves the technical problem that the position of the smoke inlet of the range hood in the prior art is fixed, resulting in a poor smoke absorption effect.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and particularly to a range hood. Background Art

[0002] A range hood is a tool installed above a cooking utensil to exhaust oil fumes. Range hoods can be classified into thin types, deep types, tower types, side suction types and other models according to their external shapes. There are two key factors affecting the user experience: firstly, the oil fume suction effect; secondly, saving space without a sense of depression.

[0003] None of the above models can meet the user experience requirements at the same time. For the thin type and side suction type, the smoke inlet is moved downward and close to the cooking area, which can improve the oil fume suction effect to a certain extent, but the space occupied under the cabinet is too large; and in order to improve the oil fume suction effect, most of them use a flap to form a smoke gathering cavity. However, after the flap is opened, the actual position of the smoke inlet does not change, and thus the position of the negative pressure area cannot be completely changed, and the improvement of the oil fume suction effect is not obvious; for the deep type and tower type, the hanging position is far from the cooking area, which saves the space under the cabinet, but the smoke inlet is far from the cooking area, and the oil fume suction effect is poor. And because users have different cooking methods, the amount of oil fumes generated is also different. In order to solve this problem, the range hoods on the market adopt the means of adjusting the air volume. Although there is a certain improvement, a large amount of cost is consumed. Summary of the Invention

[0004] The purpose of the present invention is to provide a range hood to alleviate the technical problem that the position of the smoke inlet of the range hood in the prior art is fixed, resulting in a poor oil fume suction effect.

[0005] The present invention provides a range hood, including: a smoke collecting component, an oil cup component and a stepped smoke inlet component;

[0006] The smoke collecting component includes a smoke collecting hood;

[0007] The oil cup component is located below the smoke collecting hood;

[0008] The stepped smoke inlet component is installed between the smoke collecting hood and the oil cup component and is located on the left and right sides of the smoke collecting hood. The stepped smoke inlet component includes a first oil screen and a second oil screen, and the first oil screen and the second oil screen move relative to each other to change the overall length between the first oil screen and the second oil screen; when the oil cup component moves close to the smoke collecting hood, it is used to drive the stepped smoke inlet component to retract into the smoke collecting hood.

[0009] Further, when the oil cup component moves away from the smoke collecting hood, the stepped smoke inlet components arranged left and right are in an inverted "ladder" shape structure; or, the stepped smoke inlet components arranged left and right are in a "V" shape structure; or, along the left and right directions, the stepped smoke inlet component extends obliquely downward from the outside to the center.

[0010] Further, the stepped smoke inlet assembly includes a first oil screen and a second oil screen slidably connected to the first oil screen;

[0011] One end of the first oil screen away from the second oil screen is rotatably connected to the smoke collecting hood, and one end of the second oil screen away from the first oil screen is rotatably connected to the oil cup assembly;

[0012] When the oil cup assembly moves closer to or away from the smoke collecting hood, the overlapping area between the first oil screen and the second oil screen can be increased or decreased, so that the overall length of the two is changed.

[0013] Further, a second oil screen concave platform is provided on the second oil screen, and a first oil screen concave platform is provided on the first oil screen;

[0014] The first oil screen concave platform and the left and right side surfaces of the second oil screen form a first oil screen oil flow channel, and the second oil screen concave platform and the left and right side surfaces of the first oil screen form a second oil screen oil flow channel.

[0015] Further, a plurality of inner smoke inlet holes are provided on the first oil screen concave platform, and the plurality of inner smoke inlet holes are arranged in an inverted "U" shape;

[0016] A plurality of outer smoke inlet holes are provided on the second oil screen concave platform, and the plurality of outer smoke inlet holes are arranged in a "U" shape;

[0017] Among them, the "U" shape and the inverted "U" shape are coaxially arranged.

[0018] Further, both the outer smoke inlet holes and the inner smoke inlet holes are long strip holes;

[0019] The distance between two adjacent outer smoke inlet holes is not less than the width of the inner smoke inlet holes, and the distance between two adjacent inner smoke inlet holes is not less than the width of the outer smoke inlet holes.

[0020] Further, ball bearings are provided between the first oil screen and the second oil screen, and the two are slidably connected through the ball bearings.

[0021] Further, outer convex grooves are provided on the opposite sides of the second oil screen, and inner concave grooves are provided on the opposite sides of the first oil screen; or, inner concave grooves are provided on the opposite sides of the second oil screen; outer convex grooves are provided on the opposite sides of the first oil screen;

[0022] The outer convex grooves and the inner concave grooves are slidably connected through the ball bearings.

[0023] Further, when the range hood is in the working state, the angle between the plane formed by the first oil screen and the second oil screen and the horizontal plane is not less than 14° and not more than 42°.

[0024] Further, the second oil screen concave platform is located inside the first oil screen concave platform, and the distance between their surfaces is not less than 4 mm; the distance between their sides is not less than 4 mm.

[0025] Further, the side of the second oil screen is provided with an inwardly concave oil retaining edge, and its height is not less than 2 mm;

[0026] The inwardly concave oil retaining edge and the side of the first oil screen concave platform form an oil guiding groove.

[0027] Further, the oil cup assembly includes an oil cup, an oil cup fixing seat and a locking assembly;

[0028] The oil cup fixing seat is provided with an installation groove;

[0029] The locking assembly includes a plug pin and an elastic limiting component. The outer peripheral surface of the plug pin is provided with a limiting groove. The bottom wall of the installation groove is provided with a storage groove. The elastic limiting component is vertically arranged on the side wall of the storage groove. The plug pin is inserted into the storage groove so that the elastic limiting component abuts against the limiting groove.

[0030] Further, the elastic limiting component includes an elastic member and a limiting bead. The two ends of the elastic member are respectively connected to the inner wall of the storage groove and the limiting bead.

[0031] Further, the locking assembly further includes an elastic abutting member. The elastic abutting member is arranged on the bottom wall of the storage groove. When the oil cup is installed on the oil cup fixing seat, the plug pin abuts against the elastic abutting member.

[0032] Further, an oil cup pressing platform is arranged on the side of the oil cup facing away from the plug pin.

[0033] Further, the oil cup fixing seat is provided with an oil leakage hole communicated with the installation groove. When the oil cup is installed in the installation groove, the oil cup is communicated with the oil leakage hole.

[0034] Further, the range hood further includes a smoke blocking assembly;

[0035] The smoke blocking assembly includes a flexible plate. The flexible plate is installed between the smoke collecting hood and the oil cup assembly. When the oil cup assembly moves away from the smoke collecting hood, the smoke collecting hood, the oil cup assembly, the stepped smoke inlet assembly and the flexible plate enclose a smoke collecting cavity, and the smoke collecting cavity is communicated with the outside.

[0036] Further, the smoke blocking assembly further includes a reel. The reel is rotatably connected to the smoke collecting cavity;

[0037] One end of the flexible plate away from the oil cup assembly can be wound around the reel.

[0038] Furthermore, an electric push rod is installed in the smoke collecting hood, and the output end of the electric push rod is in transmission connection with the oil cup assembly;

[0039] A smoke detection sensor is provided on the smoke collecting hood, and both the smoke detection sensor and the electric push rod are electrically connected to a controller.

[0040] Furthermore, a protection box is provided on the smoke collecting hood;

[0041] The electric push rod is installed in the protection box, and the output end of the electric push rod extends out of the protection box.

[0042] Furthermore, a flange edge is provided on the protection box, and a groove is provided on the inner side of the flange edge;

[0043] An oil-proof rubber ring is provided on the outer side of the protection box, and a raised oil-blocking groove is provided on the oil-proof rubber ring. The raised oil-blocking groove is inserted into the groove to form a sealing surface.

[0044] Furthermore, the range hood is installed in a cabinet, and the bottom end of the cabinet has an opening;

[0045] Part of the smoke collecting hood is located outside the opening.

[0046] Beneficial effects:

[0047] For the range hood provided by the present invention, the staggered smoke inlet assembly is installed between the smoke collecting hood and the oil cup assembly. The staggered smoke inlet assembly includes a first oil screen and a second oil screen, and the first oil screen and the second oil screen move relative to each other to change the overall length between the first oil screen and the second oil screen. Specifically, when the oil cup assembly moves closer to the smoke collecting hood, it can drive the staggered smoke inlet assembly to be retracted into the smoke collecting hood. At this time, the smoke inlet of the range hood is closed; when the oil cup assembly moves away from the smoke collecting hood, the smoke inlet of the range hood is opened, and the cooking fume can enter the smoke collecting hood through the smoke inlet. By changing the overall length between the first oil screen and the second oil screen, the adjustment of the smoke inlet of the range hood can be realized.

[0048] When the range hood is in the non-use state, the staggered smoke inlet assembly can be retracted into the smoke collecting hood, making the kitchen more refined and cleaner; when in the use state, the oil cup assembly can be lowered to open the smoke inlet. Among them, the greater the distance that the oil cup assembly is lowered, the closer the smoke inlet is to the cooking surface. It can be seen that the range hood can adjust the position of the smoke inlet according to the amount of cooking fume, and the negative pressure area moves with the movement of the smoke inlet, which can accelerate the suction of the cooking fume and improve the smoking effect. Brief Description of the Drawings

[0049] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0050] Figure 1 The front view of the range hood recycled into the cabinet provided by the embodiment of the present invention;

[0051] Figure 2 The front view of the range hood in the working state provided by the embodiment of the present invention;

[0052] Figure 3 The structural schematic diagram of the range hood in the non-working state provided by the embodiment of the present invention;

[0053] Figure 4 The structural schematic diagram of the range hood in the working state provided by the embodiment of the present invention;

[0054] Figure 5 For Figure 4 The structural schematic diagram of the hidden range hood hiding partial components shown;

[0055] Figure 6 The sectional view of the hidden range hood hiding partial components in the non-working state;

[0056] Figure 7 The sectional view of the hidden range hood hiding partial components in the working state;

[0057] Figure 8 The longitudinal sectional view of the hidden range hood in the non-working state;

[0058] Figure 9 The structural schematic diagram of the connection between the reel and the flexible plate;

[0059] Figure 10 The sectional view of the first oil screen and the second oil screen;

[0060] Figure 11 For Figure 10 The partial enlarged schematic diagram of the position A shown;

[0061] Figure 12 The top view of the first oil screen and the second oil screen;

[0062] Figure 13 For Figure 12 The partial enlarged schematic diagram of the position B shown;

[0063] Figure 14Schematic diagram of the concealed range hood in the working state, where the arrows indicate the movement directions of the corresponding components;

[0064] Figure 15 Side view of the first oil screen and the second oil screen;

[0065] Figure 16 For Figure 15 Partial enlarged schematic diagram at the position C shown;

[0066] Figure 17 Comparison schematic diagram of the concealed range hood in the working state and the non - working state;

[0067] Figure 18 For Figure 17 Partial enlarged schematic diagram at the position D shown;

[0068] Figure 19 Schematic diagram of oil guiding by the stepped net;

[0069] Figure 20 Schematic diagram of the structure of the concave oil - retaining edge and the oil - guiding groove;

[0070] Figure 21 Schematic diagram of the structure of the oil cup assembly;

[0071] Figure 22 Cross - sectional view of the oil cup assembly;

[0072] Figure 23 For Figure 22 Partial enlarged schematic diagram at the position E shown;

[0073] Figure 24 Partial schematic diagram of the smoke collecting hood;

[0074] Figure 25 Schematic diagram of the smoke detection sensor control;

[0075] Figure 26 Schematic diagram of the connection structure of the electric push rod and the protection box;

[0076] Figure 27 Cross - sectional view of the electric push rod and the protection box;

[0077] Figure 28 For Figure 27 Partial enlarged schematic diagram at the position F shown.

[0078] Icons:

[0079] 10 - Cabinet;

[0080] 100 - Smoke collecting hood;

[0081] 200 - Oil cup assembly; 210 - Oil cup; 220 - Oil cup fixing base; 231 - Pin; 232 - Elastic member; 233 - Limit bead; 234 - Elastic abutting member; 235 - Oil cup pressing platform; 236 - Oil leakage hole; 240 - Push rod connecting platform;

[0082] 300 - Staggered smoke inlet assembly; 310 - First oil screen; 320 - Second oil screen; 330 - Ball; 340 - Oil guide groove; 311 - First oil screen concave platform; 312 - First oil screen oil flow channel; 313 - Inner smoke inlet hole; 314 - Inner groove; 315 - First oil screen roller; 321 - Second oil screen concave platform; 322 - Second oil screen oil flow channel; 323 - Outer smoke inlet hole; 324 - Outer convex groove; 325 - Inner concave oil retaining edge; 326 - Second oil screen roller;

[0083] 400 - Smoke blocking assembly; 410 - Flexible plate; 420 - Reel;

[0084] 500 - Electric push rod;

[0085] 600 - Smoke detection sensor;

[0086] 700 - Controller;

[0087] 800 - Protection box; 810 - Flange edge;

[0088] 900 - Oil-proof rubber ring. Detailed implementation manners

[0089] To make the purposes, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Usually, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0090] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0091] It should be noted that: similar reference numerals and letters denote similar items in the following accompanying drawings. Therefore, once an item is defined in one accompanying drawing, it does not need to be further defined and explained in subsequent accompanying drawings.

[0092] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0093] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0094] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "install", "connect", "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0095] The following will describe some embodiments of the present invention in detail with reference to the drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0096] Refer to Figures 1 to 4 and Figure 8 , this embodiment provides a range hood, including: a smoke collecting component, an oil cup component 200, and a stepped smoke inlet component 300; the smoke collecting component includes a smoke collecting cover 100; the oil cup component 200 is located below the smoke collecting cover 100; the stepped smoke inlet component 300 is installed between the smoke collecting cover 100 and the oil cup component 200, and the stepped smoke inlet component 300 includes a first oil net 310 and a second oil net 320, and the first oil net 310 and the second oil net 320 move relative to each other to change the overall length between the first oil net 310 and the second oil net 320; when the oil cup component 200 moves close to the smoke collecting cover 100, it is used to drive the stepped smoke inlet component 300 to be retracted into the smoke collecting cover 100.

[0097] In this embodiment of the range hood, when the oil cup assembly 200 moves closer to the smoke collecting hood 100, it can drive the staggered smoke inlet assembly 300 to be retracted into the smoke collecting hood 100. At this time, the smoke inlet of the range hood is closed; when the oil cup assembly moves away from the smoke collecting hood 100, the smoke inlet of the range hood is opened, and the cooking fumes can enter the smoke collecting hood 100 through the smoke inlet. By changing the overall length between the first oil screen 310 and the second oil screen 320, the adjustment of the smoke inlet of the range hood can be achieved.

[0098] When the range hood is in the non-use state, the staggered smoke inlet assembly 300 can be retracted into the smoke collecting hood 100, making the kitchen more refined and cleaner; when in the use state, the oil cup assembly 200 can be lowered to open the smoke inlet. Among them, the greater the distance that the oil cup assembly 200 is lowered, the closer the smoke inlet is to the cooking surface. It can be seen that the range hood can adjust the position of the smoke inlet according to the amount of cooking fumes, and make the negative pressure area move with the movement of the smoke inlet, which can accelerate the suction of the cooking fumes and improve the smoking effect.

[0099] Specifically, two groups of staggered smoke inlet assemblies 300 are provided, and the two groups of staggered smoke inlet assemblies 300 are arranged along the left and right sides of the smoke collecting hood 100; each group of staggered smoke inlet assemblies 300 includes a first oil screen 310 and a second oil screen 320.

[0100] Optionally, the first oil screen 310 and the second oil screen 320 can be slidably connected, or other forms that can ensure their relative movement.

[0101] In this embodiment, referring to Figure 1 and Figure 2 , the range hood is installed on the cabinet 10, and the bottom end of the cabinet 10 has an opening; a part of the smoke collecting hood 100 is located outside the opening.

[0102] Referring to Figure 4 , when the oil cup assembly 200 moves away from the smoke collecting hood 100, the staggered smoke inlet assemblies 300 arranged on the left and right are in an inverted "ladder" structure.

[0103] Alternatively, when the oil cup assembly 200 moves away from the smoke collecting hood 100, the staggered smoke inlet assemblies 300 arranged on the left and right are in a "V" shape structure.

[0104] Alternatively, when the oil cup assembly 200 moves away from the smoke collecting hood 100, along the left and right directions, the staggered smoke inlet assemblies 300 are arranged to extend downward and obliquely from the outside to the center.

[0105] Furthermore, referring to Figure 5, one end of the first oil screen 310 far from the second oil screen 320 is rotatably connected to the smoke collecting hood 100, and one end of the second oil screen 320 far from the first oil screen 310 is rotatably connected to the oil cup assembly 200; when the oil cup assembly 200 moves closer to or farther from the smoke collecting hood 100, the overlapping area between the first oil screen 310 and the second oil screen 320 can be increased or decreased, so that the overall length of the two is changed, and then the opening of the smoke inlet is gradually decreased or increased.

[0106] Specifically, the outer shapes of the second oil screen 320 and the first oil screen 310 are both rectangular, and the second oil screen 320 and the first oil screen 310 are arranged in parallel.

[0107] Briefly speaking, when the oil cup assembly 200 moves away from the smoke collecting hood 100 (that is, when the range hood is in the working state), the overlapping area between the first oil screen 310 and the second oil screen 320 is reduced (the area of the overlapping area changes with the change of the position of the smoke inlet), and the sum of the lengths of the two is increased; on the contrary (that is, when the range hood is in the non-working state), the overlapping area between the first oil screen 310 and the second oil screen 320 is increased, and the sum of the lengths of the two is reduced.

[0108] In an embodiment of the present application, refer to Figure 6 and Figure 7 , one end of the first oil screen 310 far from the second oil screen 320 is rotatably connected to the smoke collecting hood 100 through the first oil screen roller 315, and one end of the second oil screen 320 far from the first oil screen 310 is rotatably connected to the oil cup assembly 200 through the second oil screen roller 326.

[0109] Refer to Figure 7 , when the oil cup assembly 200 is pushed down or pulled, the first oil screen 310 and the second oil screen 320 will rotate relative to the first oil screen roller 315 and the second oil screen roller 326. At the same time, the first oil screen 310 slides relative to the second oil screen 320, so that the sum of their lengths is increased.

[0110] Refer to Figure 10 , there are balls 330 between the first oil screen 310 and the second oil screen 320, and they are slidably connected through the balls 330.

[0111] Specifically, refer to Figure 10 and Figure 11 , on the opposite sides of the second oil screen 320, there are outward convex grooves 324; on the opposite sides of the first oil screen 310, there are inward concave grooves 314; the outward convex grooves 324 and the inward concave grooves 314 are slidably connected through the balls 330.

[0112] As a variation, inward concave grooves are provided on the opposite sides of the second oil screen 320, and outward convex grooves are provided on the opposite sides of the first oil screen 310. Refer to Figure 12 and Figure 13, a first oil screen 310 is provided with a first oil screen concave platform 311, and a second oil screen 320 is provided with a second oil screen concave platform 321; the first oil screen concave platform 311 and the left and right side surfaces of the second oil screen 320 form a first oil screen oil flow channel 312, and the second oil screen concave platform 321 and the left and right side surfaces of the first oil screen 310 form a second oil screen oil flow channel 322.

[0113] Specifically, the second oil screen concave platform 321 is arranged at the central position of the second oil screen 320, the first oil screen concave platform 311 is arranged at the central position of the first oil screen 310, the cross-sections of the second oil screen concave platform 321 and the first oil screen concave platform 311 are both rectangular, and the length directions are the same as the lengths of the second oil screen 320 and the first oil screen 310. The width of the second oil screen concave platform 321 is the same as the width of the first oil screen concave platform 311. An inverted "U" - shaped first oil screen oil flow channel 312 is formed between the first oil screen concave platform 311 and the left and right side surfaces of the second oil screen 320, and a "U" - shaped second oil screen oil flow channel 322 is formed between the second oil screen concave platform 321 and the left and right side surfaces of the first oil screen 310. The first oil screen oil flow channel 312 and the second oil screen oil flow channel 322 are connected to form an "O" - shaped oil flow channel; the grease filtered and condensed by the second oil screen 320 and the first oil screen 310 flows through the first oil screen oil flow channel 312 and the second oil screen oil flow channel 322 and finally converges into the oil cup, avoiding the accumulation of grease on the second oil screen 320 and the first oil screen 310; at the same time, the second oil screen concave platform 321 and the first oil screen concave platform 311 are in contact, ensuring the sealing of the staggered screen assembly while the grease flows.

[0114] Further, a plurality of outer smoke inlet holes 323 are provided on the second oil screen concave platform 321, and the plurality of outer smoke inlet holes 323 are arranged in a "U" - shape; a plurality of inner smoke inlet holes 313 are provided on the first oil screen concave platform 311, and the plurality of inner smoke inlet holes 313 are distributed in an inverted "U" - shape; among them, the "U" - shape and the inverted "U" - shape are coaxially arranged.

[0115] In this embodiment, both the outer smoke inlet holes 323 and the inner smoke inlet holes 313 are long - strip holes; the distance between two adjacent outer smoke inlet holes 323 is not less than the width of the inner smoke inlet holes 313, and the distance between two adjacent inner smoke inlet holes 313 is not less than the width of the outer smoke inlet holes 323.

[0116] Specifically, refer to Figures 13 to 16, the second oil screen concave platform 321 is provided with a plurality of identical long waist-shaped outer smoke inlet holes 323, the designed width thereof is D1, the distance between two adjacent holes is D2, and all the outer smoke inlet holes 323 form a "U" shape; the first oil screen concave platform 311 is provided with a plurality of identical long waist-shaped inner smoke inlet holes 313, the width thereof is D1, the distance between two adjacent holes is D2, and all the inner smoke inlet holes 313 form an inverted "U" shape; when the range hood is not started, the inner and the second oil screens coincide. To ensure the sealing performance in the non-started state, it is designed that D2≥D1, and the smoke inlet is blocked by the staggered layer without a smoke inlet; during cooking, when the amount of oil fume is small, the inner and the second oil screens move relative to each other, the staggered layer net opens, and the inner and the second oil screens on the left side of the range hood rotate clockwise at the same time, and the first and the second oil screens on the right side of the range hood rotate counterclockwise, the smoke inlet appears, and smoking starts. And as the cooking oil fume increases, the push rod runs to the lowest distance D3, the staggered layer oil net is completely opened, the inverted "U" shaped inner smoke inlet holes 313 of the first oil screen 310 and the "U" shaped outer smoke inlet holes 323 of the second oil screen 320 form an overall annular "O" air inlet area, and the second oil screen 320 runs to an area closer to the cooking area, the negative pressure area moves downwards, thereby improving the smoking effect.

[0117] Among them, 100mm≤D3≤450mm, preferably D3 = 300mm.

[0118] Refer to Figure 17 , when the range hood is in the working state, the angle between the plane formed by the first oil screen 310 and the second oil screen 320 and the horizontal plane is a1, 14°≤a1≤42°. In this embodiment, preferably a1 = 26° when moving to the lowest point.

[0119] When the range hood is not working, the openings of the first oil screen 310 and the second oil screen 320 form a staggered layer to form a sealing surface. The condensed oil droplets on the inner upper surface of the smoke collecting cavity drip onto the inner side of the staggered layer net. When not working, the staggered layer net as a whole forms an angle a2 with the horizontal plane, a2≥6°, preferably a2 = 8°, to form an oil guiding surface, and finally enters the oil cup 210.

[0120] Refer to Figure 18 and Figure 19 , the second oil screen concave platform 321 is located inside the first oil screen concave platform 311, and the distance between their surfaces is D4, D4 is not less than 4mm, preferably D4 = 4.5mm; the distance between their sides is D5, D5 is not less than 4mm, preferably D5 = 7mm.

[0121] Refer to Figure 20 , the side of the second oil screen 320 is provided with an inward concave oil retaining edge 325, the height thereof is D6, D6 is not less than 2mm, preferably D6 = 2.5mm; the inward concave oil retaining edge 325 and the side of the first oil screen concave platform 311 form an oil guiding groove 340.

[0122] The condensed grease on the outer surface of the first oil screen 310 can drip onto the inner surface of the second oil screen 320 as it moves downward on its surface; the concave oil retaining edge 325 ensures that the grease does not enter the ball track to avoid adhesion of the grease; the condensed grease on the inner surface of the first oil screen 310 drips onto the inner surface of the second oil screen 320 through the oil guiding groove 340, and finally drips to the oil cup fixing seat 220 through the lowest point of the first oil screen 310. The surface of the oil cup fixing seat 220 is designed with an oil leakage hole 236, and then enters the oil cup 210.

[0123] Refer to Figures 21 to 23 , the oil cup assembly 200 includes an oil cup 210, an oil cup fixing seat 220 and a locking assembly; the oil cup fixing seat 220 is provided with a mounting groove; the locking assembly includes a plug 231 and an elastic limiting component. A limiting groove is provided on the outer peripheral surface of the plug 231, a storage groove is provided on the bottom wall of the mounting groove, and the elastic limiting component is vertically arranged on the side wall of the storage groove, and when the plug 231 is inserted into the storage groove, the elastic limiting component abuts against the limiting groove.

[0124] Further, the elastic limiting component includes an elastic member 232 and a limiting bead 233, and both ends of the elastic member 232 are respectively connected to the inner wall of the storage groove and the limiting bead 233.

[0125] Specifically, one end of the elastic member 232 is connected to the limiting bead 233 in a rolling manner, and the other end is fixedly connected to the inner wall of the storage groove. The limiting bead 233 abuts against the limiting groove, and the cross-sectional shape and size of the limiting groove are adapted to the limiting bead 233. The elastic member 232 is fixedly connected to prevent the elastic member 232 and the limiting bead 233 from falling out of the storage groove as the oil cup 210 is disassembled. When installing the oil cup 210, when the operator applies force, the limiting bead 233 is stressed, pushing the elastic member 232 to move in a direction away from the plug 231, the plug 231 is inserted into the storage groove, and the limiting bead 233 abuts tightly against the limiting groove, completing the installation of the oil cup 210, and at the same time preventing the oil cup 210 from slipping out of the mounting groove; when disassembling the oil cup 210, under the action of an external force, the limiting bead 233 is stressed to push the elastic member 232 to move in a direction away from the plug 231, the limiting bead 233 disengages from the limiting groove, and the external force acting on the limiting groove is released, and the oil cup 210 is disassembled.

[0126] Optionally, two limiting grooves are provided on the outer peripheral surface of the plug 231, and the number of elastic limiting components is two. When the plug 231 is inserted into the storage groove, the two elastic limiting components are inserted into the two limiting grooves in a one-to-one correspondence.

[0127] Furthermore, the locking assembly further includes an elastic abutting member 234, and the elastic abutting member 234 is arranged on the bottom wall of the storage groove. When the oil cup 210 is installed on the oil cup fixing seat 220, the plug 231 abuts against the elastic abutting member 234.

[0128] Specifically, one end of the elastic abutment 234 is fixedly connected to the bottom wall of the storage slot, and the other end abuts against the latch 231 on the oil cup 210 placed in the oil cup fixing seat 220. The cross-sectional dimensions of the elastic abutment 234 are larger than those of the latch 231. When the latch 231 abuts the elastic abutment 234, it does not slip. When the oil cup 210 is removed, the abutment of one end of the latch 231 against the elastic abutment 234 presses the oil cup 210 toward the interior of the installation slot, exerting force on the oil cup 210. The latch 231 transmits the force to the elastic abutment 234, which compresses the elastic abutment 234 and exerts a reaction force on the latch 231. Under this reaction force, the elastic abutment 234 pushes the latch 231 out of the gap between the two elastic limiting assemblies. The two elastic limiting assemblies release the restraint on the oil cup 210, and the oil cup 210 returns to a free state, completing the removal of the oil cup 210.

[0129] Reference Figure 21 An oil cup pressing platform 235 is provided on the side of the oil cup 210 away from the latch 231 . Pressing the oil cup pressing platform 235 can realize the disassembly and assembly between the oil cup 210 and the oil cup fixing seat 220 .

[0130] Specifically, the oil cup pressing platform 235 is fixedly arranged at the center position of the side of the oil cup 210 away from the pin 231. By pressing the oil cup pressing platform 235, the two elastic limiting components and the pin 231 are matched and disengaged. There is no need to directly contact the oil cup 210 during disassembly or installation, which is convenient and hygienic. The oil cup pressing platform 235 is set at the center position to ensure that when the oil cup pressing platform 235 is pressed, the entire oil cup 210 is evenly stressed, so that the oil cup 210 remains balanced.

[0131] During the specific operation, the oil cup 210 is placed in the oil cup fixing seat 220, the latch 231 enters the elastic member 232, and the oil cup 210 is fixed. When removing the oil cup 210, the oil cup pressing platform 235 is pressed, the elastic member 232 pops out the latch 231, and the oil cup 210 is taken out.

[0132] Please continue to refer to Figure 21 The oil cup fixing seat 220 is provided with an oil leakage hole 236 which is in communication with the mounting groove. When the oil cup 210 is installed in the mounting groove, the oil cup 210 is in communication with the oil leakage hole 236 .

[0133] There can be multiple oil leakage holes 236, which connect the smoke collecting chamber and the oil cup 210; the smoke collecting chamber filters the condensed oil smoke, and the condensed grease flows from the upper end of the oil cup fixing seat 220 to the oil cup 210 through the oil leakage holes 236 at the upper end of the oil cup fixing seat 220, and the oil cup 210 collects and cleans the grease in a unified manner; multiple oil leakage holes 236 can increase the speed at which the oil cup 210 collects grease, and try to avoid grease accumulation at the upper end of the oil cup fixing seat 220.

[0134] ReferenceFigure 4 、 Figure 5 、 Figure 8 and Figure 9 The range hood also includes a smoke shield assembly 400; the smoke shield assembly 400 includes a flexible plate 410, which is installed between the smoke hood 100 and the oil cup assembly 200. When the oil cup assembly 200 moves away from the smoke hood 100, the smoke hood 100, the oil cup assembly 200, the staggered smoke inlet assembly 300 and the flexible plate 410 form a smoke collecting chamber, which is connected to the outside through the smoke inlet.

[0135] Because the flexible plate 410 is installed between the fume hood 100 and the oil cup assembly 200, and the fume hood 100, the oil cup assembly 200, the staggered smoke inlet assembly 300, and the flexible plate 410 form a smoke collection chamber, the smoke collection chamber is connected to the outside through the smoke inlet, and oil smoke can enter the smoke collection chamber through the smoke inlet, thereby achieving oil smoke discharge. In this embodiment, the cross-section of the smoke collection chamber is an inverted "trapezoidal" structure.

[0136] Further, refer to Figure 8 and Figure 9 The smoke shield assembly 400 further includes a reel 420 , which is rotatably connected to the smoke collecting chamber; one end of the flexible plate 410 away from the oil cup assembly 200 can be wound around the reel 420 .

[0137] Specifically, when the range hood is not working, the flexible plate 410 rotates through the reel 420 and is wound around the reel 420. When the range hood starts working, the oil cup fixing seat 220 starts to move downward, driving the flexible plate 410 to move downward. The flexible plate 410 is in an inverted trapezoidal shape as a whole. After the left and right staggered nets (inner and second oil nets) start to move, the side surfaces are in an inverted trapezoidal shape. The flexible plate 410 covers the side surfaces of the staggered nets, and the side surfaces are sealed. The negative pressure areas are concentrated at the smoke inlets on the left and right sides, thereby improving the smoking effect.

[0138] Reference Figure 7 、 Figure 24 and Figure 25 An electric push rod 500 is installed in the smoke hood 100, and the output end of the electric push rod 500 is transmission-connected to the oil cup assembly 200; a smoke detection sensor 600 is provided on the smoke hood 100, and the smoke detection sensor and the electric push rod 500 are both electrically connected to the controller 700.

[0139] Furthermore, the smoke hood 100 is also provided with a lighting lamp, and smoke detection sensors are located on both sides of the lighting lamp. The smoke detection sensors are used to collect the oil smoke concentration. When the oil smoke concentration is high, the smoke detection sensors generate two signals. For one signal, the controller 700 controls the operation of the electric push rod 500, and adjusts the pushing distance of the electric push rod 500 according to the oil smoke concentration, thereby adjusting the position of the smoke inlet and the air inlet area of the smoke inlet; the second signal adjusts the motor output power of the volute fan and the air volume, thereby improving the smoking effect and reducing energy consumption.

[0140] Adjustment of the air inlet area and air volume. According to Q = SV, where Q is the air volume, S is the air inlet area, and V is the average flow velocity on the surface of the air inlet. The flow velocity at the air inlet affects the size of the negative pressure area and thus affects the smoking effect. In this embodiment, V ≥ 1.2 m / s.

[0141] Refer to Figures 26 to 28 , a protection box 800 is provided on the smoke collecting hood 100; the electric push rod 500 is installed in the protection box 800, and the output end of the electric push rod 500 extends out of the protection box 800; a flange 810 is provided on the protection box 800, and a groove is provided inside the flange 810; an oil-proof rubber ring 900 is provided on the outside of the protection box 800, and a convex oil-blocking groove is provided on the oil-proof rubber ring 900. The convex oil-blocking groove is inserted into the groove to form a sealing surface, improve the sealing effect, protect the electric push rod 500, and extend the service life.

[0142] Refer to Figure 21 and Figure 28 , a push rod connecting platform 240 is provided on the oil cup fixing seat 220, and the end of the electric push rod 500 away from the protection box 800 is fixedly connected to the push rod connecting platform 240.

[0143] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A range hood, characterized in that: include: A smoke collecting assembly, an oil cup assembly (200) and a staggered smoke inlet assembly (300); The smoke collection assembly comprises a smoke collection hood (100); The oil cup assembly (200) is located below the fume hood (100); The staggered smoke inlet assembly (300) is installed between the smoke hood (100) and the oil cup assembly (200), and the staggered smoke inlet assembly (300) includes a first oil net (310) and a second oil net (320), and the first oil net (310) and the second oil net (320) move relative to each other so that the overall length between the first oil net (310) and the second oil net (320) changes; when the oil cup assembly (200) moves close to the smoke hood (100), it is used to drive the staggered smoke inlet assembly (300) to be recovered in the smoke hood (100).

2. The range hood according to claim 1, characterized in that: When the oil cup assembly (200) moves away from the smoke collecting hood (100), the staggered smoke inlet assemblies (300) arranged on the left and right are in an inverted "ladder" structure; or, the staggered smoke inlet assemblies (300) arranged on the left and right are in a "V" structure; or, along the left and right directions, the staggered smoke inlet assemblies (300) are arranged to extend downwardly from the outside to the center.

3. The range hood according to claim 2, characterized in that: One end of the first oil net (310) away from the second oil net (320) is rotatably connected to the fume hood (100), and one end of the second oil net (320) away from the first oil net (310) is rotatably connected to the oil cup assembly (200); The oil cup assembly (200) moves closer to or farther from the fume hood (100), which can increase or decrease the overlapping area between the first oil net (310) and the second oil net (320), thereby changing the overall length of the two.

4. The range hood according to claim 3, characterized in that: The first oil net (310) is provided with a first oil net inner concave platform (311), and the second oil net (320) is provided with a second oil net inner concave platform (321); The first oil net inner concave platform (311) and the left and right side surfaces of the second oil net (320) form a first oil net oil passage (312), and the second oil net inner concave platform (321) and the left and right side surfaces of the first oil net (310) form a second oil net oil passage (322).

5. The range hood according to claim 4, characterized in that: A plurality of inner smoke inlet holes (313) are provided on the inner concave platform (311) of the first oil net, and the plurality of inner smoke inlet holes (313) are arranged in an inverted "U" shape; a plurality of outer smoke inlet holes (323) are provided on the inner concave platform (321) of the second oil net, and the plurality of outer smoke inlet holes (323) are arranged in a "U" shape; Wherein, the "U" shape and the inverted "U" shape are coaxially arranged.

6. The range hood according to claim 5, characterized in that: The outer smoke inlet (323) and the inner smoke inlet (313) are both long holes; The distance between two adjacent external smoke inlet holes (323) is not less than the width of the internal smoke inlet hole (313), and the distance between two adjacent internal smoke inlet holes (313) is not less than the width of the external smoke inlet hole (323).

7. The range hood according to claim 3, characterized in that: A ball bearing (330) is provided between the first oil net (310) and the second oil net (320), and the two are slidably connected via the ball bearing (330).

8. The range hood according to claim 7, characterized in that: The second oil net (320) has outer convex grooves (324) on opposite sides, and the first oil net (310) has inner concave grooves (314) on opposite sides; or the second oil net (320) has inner concave grooves on opposite sides, and the first oil net (310) has outer convex grooves on opposite sides; The outer convex groove (324) and the inner concave groove (314) are slidably connected via the ball (330).

9. The range hood according to claim 4, characterized in that: When the range hood is in operation, the angle between the plane formed by the first oil net (310) and the second oil net (320) and the horizontal plane is not less than 14° and not more than 42°.

10. The range hood according to claim 9, characterized in that: The second oil net inner concave platform (321) is located inside the first oil net inner concave platform (311), and the distance between the two surfaces is not less than 4 mm; the distance between the two side surfaces is not less than 4 mm.

11. The range hood according to claim 4, characterized in that: The side surface of the second oil net (320) is provided with an inwardly concave oil retaining edge (325), the height of which is not less than 2 mm; The concave oil retaining edge (325) and the side surface of the first oil net concave platform (311) form an oil guide groove (340).

12. The range hood according to any one of claims 1 to 11, characterized in that: The oil cup assembly (200) comprises an oil cup (210), an oil cup fixing seat (220) and a locking assembly; The oil cup fixing seat (220) is provided with a mounting groove; The locking assembly comprises a latch (231) and an elastic limiting assembly, the outer peripheral surface of the latch (231) is provided with a limiting groove, the bottom wall of the installation groove is provided with a storage groove, the elastic limiting assembly is vertically arranged on the side wall of the storage groove, and the latch (231) is plugged into the storage groove so that the elastic limiting assembly abuts against the limiting groove.

13. The range hood according to claim 12, characterized in that: The elastic limiting assembly comprises an elastic member (232) and a limiting bead (233), and two ends of the elastic member (232) are respectively connected to the inner wall of the storage groove and the limiting bead (233).

14. The range hood according to claim 13, characterized in that: The locking assembly further comprises an elastic abutment (234), wherein the elastic abutment (234) is arranged on the bottom wall of the storage groove, and when the oil cup (210) is installed on the oil cup fixing seat (220), the latch (231) abuts against the elastic abutment (234).

15. The range hood according to claim 12, characterized in that: An oil cup pressing platform (235) is provided on a side of the oil cup (210) facing away from the latch (231).

16. The range hood according to claim 12, characterized in that: An oil leakage hole (236) communicating with the installation groove is provided on the oil cup fixing seat (220); when the oil cup (210) is installed in the installation groove, the oil cup (210) is communicated with the oil leakage hole (236).

17. The range hood according to any one of claims 1 to 11, characterized in that: The range hood further comprises a smoke shielding component (400); The smoke shielding assembly (400) comprises a flexible plate (410), the flexible plate (410) being installed between the smoke collecting hood (100) and the oil cup assembly (200), and when the oil cup assembly (200) moves away from the smoke collecting hood (100), the smoke collecting hood (100), the oil cup assembly (200), the staggered smoke inlet assembly (300) and the flexible plate (410) form a smoke collecting cavity, and the smoke collecting cavity is communicated with the outside.

18. The range hood according to claim 17, characterized in that: The smoke blocking assembly (400) further includes a reel (420), and the reel (420) is rotatably connected to the smoke collecting chamber; One end of the flexible plate (410) away from the oil cup assembly (200) can be wound around the reel (420).

19. The range hood according to any one of claims 1 to 11, characterized in that: An electric push rod (500) is installed in the smoke collecting hood (100), and an output end of the electric push rod (500) is transmission-connected to the oil cup assembly (200); The smoke collecting hood (100) is provided with a smoke detection sensor (600), and the smoke detection sensor and the electric push rod (500) are both electrically connected to a controller (700).

20. The range hood according to claim 19, characterized in that: The smoke collecting hood (100) is provided with a protection box (800); The electric push rod (500) is installed on the protection box (800), and the output end of the electric push rod (500) extends out of the protection box (800).

21. The range hood according to claim 20, characterized in that: The protection box (800) is provided with a flange (810), and the inner side of the flange (810) is provided with a groove; An oil-proof rubber ring (900) is provided on the outer side of the protection box (800), and a raised oil-blocking groove is provided on the oil-proof rubber ring (900). The raised oil-blocking groove is plugged into the groove to form a sealing surface.

22. The range hood according to any one of claims 1 to 11, characterized in that: The range hood is installed in a cabinet (10), and the bottom end of the cabinet (10) has an opening; Part of the smoke collecting hood (100) is located outside the opening.

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