Oil guide piece and range hood

Abstract

The utility model provides an oil guiding piece and a range hood, the oil guiding piece is arranged in a flow channel of the range hood and used for guiding oil, the oil guiding piece comprises an air inlet part, a connecting part and a flow blocking part, and the air inlet part is provided with a plurality of first air inlet holes; the connecting part is connected with the air inlet part, and the air inlet part and / or the connecting part are / is provided with oil leakage holes; the flow blocking part is connected with the hole wall of the oil leakage hole, the projection of the flow blocking part in the preset direction covers at least part of the oil leakage hole, and the preset direction is parallel to the airflow direction of the air inlet part. According to the range hood, oil dirt in the range hood can be guided and collected, and the risk that the oil dirt drips and flies disorderly is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of range hood, in particular to a oil guide and range hood. BACKGROUND

[0002] With the continuous development of science and technology, the range hood has become one of the most common kitchen household appliances in people's daily life. In the prior art, after long-term use, oil stains are prone to accumulate and drip inside the range hood, especially when the range hood is in operation, the oil stains accumulated in the airflow passage will be blown up and splashed by the oil fume airflow, resulting in the situation that the oil droplets inside the range hood fly randomly and are difficult to clean. CONTENT OF THE UTILITY MODEL

[0003] The present application provides an oil guide and range hood, which can guide and collect oil stains inside the range hood, reducing the risk of random dripping and flying of internal oil stains.

[0004] To solve the above technical problems, the present application provides an oil guide, which is arranged in the flow passage of the range hood for guiding oil. The oil guide comprises an air inlet part, a connecting part and a flow blocking part. The air inlet part is provided with a plurality of first air inlet holes. The connecting part is connected with the air inlet part, and the air inlet part and / or the connecting part is provided with an oil leakage hole. The flow blocking part is connected with the hole wall of the oil leakage hole. The projection of the flow blocking part in a predetermined direction covers at least part of the oil leakage hole, and the predetermined direction is parallel to the airflow direction of the air inlet part.

[0005] To solve the above technical problems, the present application further provides a range hood, which comprises a box, a rack, a connecting piece and the above oil guide. The box forms a flow guide cavity and an air inlet opening communicating with the flow guide cavity. The rack forms an air duct cavity communicating with the flow guide cavity and is provided with a fan inside. The rack is arranged above the box. The connecting piece connects the box and the rack. The air inlet opening of the connecting piece communicates with the air outlet opening of the flow guide cavity, and the air outlet opening of the connecting piece communicates with the air inlet opening of the air duct cavity. The connecting piece, the rack and the box form a flow passage from the air inlet opening of the box to the fan. The oil guide is arranged at the air inlet opening of the connecting piece and is used for guiding oil stains on the connecting piece.

[0006] The beneficial effects of the present application are: the oil guide of the present application is arranged in the flow channel of the range hood for guiding oil, the oil guide comprises an air inlet part, a connecting part, and a flow blocking part, the air inlet part is provided with a plurality of first air inlet holes; the connecting part is connected with the air inlet part, and the air inlet part and / or the connecting part is provided with an oil leakage hole; the flow blocking part is connected with the hole wall of the oil leakage hole, the projection of the flow blocking part in a predetermined direction covers at least part of the oil leakage hole, and the predetermined direction is parallel to the airflow direction of the air inlet part. In the above manner, the oil fume airflow flows through the flow channel inside the range hood, the oil guide is arranged in the flow channel of the range hood, the airflow flows through the air inlet part of the oil guide, the connecting part of the oil guide is used to fix the oil guide in the range hood, and the oil stains in the flow channel can be guided to the target position through the oil guide and the oil leakage hole on the oil guide, so that this arrangement can guide and collect the oil stains inside the range hood, reduce the risk of random dripping and flying of the oil stains inside, further, the flow blocking part is arranged on the oil guide, the flow blocking part is connected with the hole wall of the oil leakage hole, and the projection of the flow blocking part in the direction parallel to the airflow direction covers at least part of the oil leakage hole, which can block the airflow at the oil leakage hole, reduce the interference of the airflow on the oil guiding process at the oil leakage hole, reduce the risk of the oil stains being blown by the airflow when flowing out of the oil guide through the oil leakage hole, and reduce the cleaning difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0008] Figure 1 is a structural schematic diagram of an embodiment of the oil guide of the present application;

[0009] Figure 2 is Figure 1 a cross-sectional structural schematic diagram of the embodiment;

[0010] Figure 3 is a structural schematic diagram of an embodiment of the range hood of the present application;

[0011] Figure 4 is Figure 3 an exploded structural schematic diagram of the embodiment;

[0012] Figure 5 is Figure 3 a cross-sectional structural schematic diagram of the embodiment;

[0013] Figure 6 is Figure 5 an enlarged structural schematic diagram of the B area in the embodiment;

[0014] Figure 7is a structural schematic view of another embodiment of the oil guide of the present application;

[0015] Figure 8 is Figure 7 is a cross-sectional structural schematic view of the embodiment;

[0016] Figure 9 is a structural schematic view of another embodiment of the oil guide of the present application;

[0017] Figure 10 is Figure 9 is a cross-sectional structural schematic view of the embodiment;

[0018] Figure 11 is Figure 9 is a side schematic view of the embodiment;

[0019] Figure 12 is a structural schematic view of another embodiment of the oil guide of the present application;

[0020] Figure 13 is Figure 12 is a cross-sectional structural schematic view of the embodiment;

[0021] Figure 14 is a structural schematic view of another embodiment of the oil guide of the present application;

[0022] Figure 15 is Figure 14 is a cross-sectional structural schematic view of the embodiment;

[0023] Figure 16 is Figure 14 is an exploded structural schematic view of the embodiment;

[0024] Figure 17 is a structural schematic view of another embodiment of the oil guide of the present application;

[0025] Figure 18 is Figure 17 is an enlarged structural schematic view of the C area in the embodiment;

[0026] Figure 19 is Figure 1 is a front schematic view of the embodiment;

[0027] Figure 20 is a structural schematic view of another embodiment of the oil guide of the present application;

[0028] Figure 21 is a structural schematic view of another embodiment of the oil guide of the present application. DETAILED DESCRIPTION

[0029] In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular architectures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

[0030] The terms "first", "second", etc. in the present application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. It should be understood that when used in the specification and the appended claims, the term "include" indicates the presence of described features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or sets thereof. It should also be understood that the terms used in the present application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should be further understood that the term "and / or" used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations thereof.

[0031] It should be noted that when an element is fixed to another element, it includes fixing the element directly to the other element, or fixing the element to the other element through at least one other element in the middle. When one element is connected to another element, it includes connecting the element directly to the other element, or connecting the element to the other element through at least one other element in the middle.

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely in the following description of the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0033] With the continuous development of science and technology, the range hood has become one of the most common kitchen household appliances in people's daily life. In the prior art, after long-term use, oil stains are prone to accumulate inside the range hood, and oil dripping phenomenon occurs. Especially in the working state of the range hood, the oil stains accumulated in the airflow passage will be blown up and splashed by the oil smoke airflow, resulting in the situation that the oil droplets in the range hood fly around, which is difficult to clean.

[0034] Generally, after the installation of the range hood is completed, the front end of the cabinet of the range hood is the end of the cabinet close to the user, the rear end of the cabinet is opposite to the front end of the cabinet, and the rear wall of the cabinet is arranged at the rear end of the cabinet. It should be noted that, in the present application, the front end or front side of a component or assembly refers to the end or side close to the user when the user uses the range hood; the rear end or rear side of the component or assembly refers to the end or side away from the user and opposite to the front end or front side, for example, the rear side of the cabinet of the range hood is usually arranged close to the wall mounting surface; in the present application, the range hood and related components and assemblies are introduced taking the state after the installation of the range hood as an example.

[0035] The present application first proposes an oil guide, as shown in Figures 1 to 21 The oil guide 10 is arranged in the flow channel of the range hood for guiding oil, and the oil guide 10 comprises an air inlet portion 11, a connecting portion 12, the air inlet portion 11 is provided with a plurality of first air inlet holes 110; the connecting portion 12 is connected with the air inlet portion 11, and the air inlet portion 11 and / or the connecting portion 12 is provided with an oil leakage hole 130. In some embodiments, the oil guide 10 further comprises a flow blocking portion 13, the flow blocking portion 13 is connected with the hole wall of the oil leakage hole 130, the projection of the flow blocking portion 13 in a predetermined direction covers at least part of the oil leakage hole 130, and the predetermined direction is parallel to the airflow direction of the air inlet portion 11.

[0036] Specifically, when the range hood is working, the suctioned oil fume airflow flows through the flow channel inside the range hood, the oil guide 10 is arranged in the flow channel through the connecting portion 12 thereof, and the airflow flows through the area where the air inlet portion 11 of the flow guide is located. When the range hood is sucking the oil fume airflow, the oil droplets carried by the oil fume airflow will adhere to the inner wall of the flow channel, and the accumulated oil stains in the flow channel can be concentrated and guided by the oil guide 10, and the oil stains collected by the oil guide 10 can flow to the target position, for example, to the oil cup 60 of the range hood, through the oil leakage hole 130 of the oil guide 10.

[0037] Wherein, the air inlet portion 11 and / or the connecting portion 12 is provided with an oil leakage hole 130 means that, in some embodiments, the air inlet portion 11 is provided with an oil leakage hole 130; in other embodiments, the connecting portion 12 can also be provided with an oil leakage hole 130; in other embodiments, the air inlet portion 11 and the connecting portion 12 can both be provided with an oil leakage hole 130, and the air inlet portion 11 and the connecting portion 12 can also jointly form an oil leakage hole 130.

[0038] Wherein, the relative position relationship between the connecting portion 12 and the air inlet portion 11 is not limited. For example, in some embodiments, the connecting portion 12 is arranged above the air inlet portion 11; in other embodiments (not shown in the figure), the air inlet portion is arranged above the connecting portion.

[0039] The projection of the flow blocking portion 13 in a predetermined direction covers at least part of the oil leakage hole 130. For example, the projection of the flow blocking portion 13 in the direction of the air flow of the air inlet portion 11 covers at least part of the oil leakage hole 130; for another example, the projection of the flow blocking portion 13 in the direction opposite to and parallel to the direction of the air flow covers at least part of the oil leakage hole 130. In this way, the air flow can be blocked from flowing through the oil leakage hole 130 when flowing through the air inlet portion 11, the interference of the air flow with the oil guiding process at the oil leakage hole 130 is reduced, and the risk of oil stains being blown by the air flow when flowing out of the oil guiding member 10 through the oil leakage hole 130 to cause oil flying inside the range hood is reduced.

[0040] The flow blocking portion 13 is connected with the hole wall of the oil leakage hole 130, which is simple in structure, easy to process, and can improve the flow blocking effect of the flow blocking portion 13 on the oil leakage hole 130.

[0041] In the above manner, the oil fume air flow flows through the flow channel inside the range hood, the oil guiding member 10 is arranged in the flow channel of the range hood, the air flow flows through the air inlet portion 11 of the oil guiding member 10, the connecting portion 12 of the oil guiding member 10 is used to fix the oil guiding member 10 in the range hood, and the oil stains in the flow channel can be guided to the target position through the oil guiding member 10 and the oil leakage hole 130 on the oil guiding member 10. Therefore, this arrangement can guide and collect the oil stains inside the range hood, reduce the risk of internal oil stains dripping and flying randomly; further, the flow blocking portion 13 is arranged on the oil guiding member 10, and the flow blocking portion 13 is connected with the hole wall of the oil leakage hole 130, the projection of the flow blocking portion 13 in the direction parallel to the direction of the air flow covers at least part of the oil leakage hole 130, which can block the air flow at the oil leakage hole 130, reduce the interference of the air flow with the oil guiding process at the oil leakage hole 130, reduce the risk of oil stains being blown by the air flow when flowing out of the oil guiding member 10 through the oil leakage hole 130 to cause oil flying inside the range hood, and reduce the cleaning difficulty.

[0042] Further, the air inlet portion 11 of the oil guiding member 10 is provided with a plurality of first air inlet holes 110, which can reduce the resistance of the oil guiding member 10 to the air flow, so that the oil fume can be smoothly discharged; at the same time, the oil guiding channel can be formed between the plurality of first air inlet holes 110, which can effectively collect the oil stains, improve the overall cleaning efficiency of the range hood, and reduce the cleaning frequency of the user.

[0043] In some embodiments, the oil leakage hole 130 is located below the first air inlet hole 110.

[0044] The oil leakage hole 130 is arranged below the first air inlet hole 110, so that the oil stains collected by the oil guiding member 10 can flow to the oil leakage hole 130 under the action of gravity, reducing the risk of oil dripping at the first air inlet hole 110 and improving the oil guiding effect of the oil guiding member 10.

[0045] In some embodiments, the oil leakage hole 130 is arranged at the lowest end of the air inlet portion 11.

[0046] The above arrangement facilitates the diversion of oil stains in the oil guide 10 to the oil cup 60 of the range hood. The oil leakage hole 130 is arranged at the lowest end of the air inlet portion 11, and the oil stains naturally flow to the oil leakage hole 130 under the action of gravity, so that the oil stains are smoothly discharged, reducing the accumulation of oil stains in the oil guide 10.

[0047] In some embodiments, referring to Figure 3 、 Figure 4 , the cabinet 20 of the range hood includes a cabinet body 21, a rear wall 22 of the cabinet, and a deflector 23 arranged at the front end of the cabinet 20, the deflector 23 being provided with an air inlet, and the airflow enters the deflection cavity from the air inlet of the deflector 23; the rack 30 includes a rack body 31 and a front plate 32 of the rack, and the fan 50 of the range hood is arranged in the rack 30; the oil cup 60 is arranged at the bottom of the cabinet 20.

[0048] In some embodiments, the upper surface of the air inlet portion 11 is arranged at an acute angle with the inner surface of the connecting portion 12; and the oil leakage hole 130 is arranged at the lowest end of the air inlet portion 11.

[0049] The upper surface of the air inlet portion 11 refers to the surface area of the air inlet portion 11 arranged upwardly when the oil guide 10 is arranged in the range hood after the installation of the range hood is completed.

[0050] This arrangement facilitates the downwardly inclined extension of the upper surface of the air inlet portion 11, and facilitates the diversion of oil stains on the upper surface of the air inlet portion 11 to the oil leakage hole 130. Specifically, when the connecting portion 12 is arranged in the range hood along the vertical direction, the upper surface of the air inlet portion 11 is arranged at an acute angle with the inner surface of the connecting portion 12, which can make the upper surface of the air inlet portion 11 downwardly inclinedly extend toward the connection between the air inlet portion 11 and the connecting portion 12, i.e., the connection between the air inlet portion 11 and the connecting portion 12 becomes the lowest end of the oil guide 10 and the lowest end of the air inlet portion 11, which is beneficial to the centralized diversion of oil stains in the oil guide 10 to the lowest end of the air inlet portion 11, and the discharge through the oil leakage hole 130 at the lowest end of the air inlet portion 11.

[0051] In some embodiments, the connecting portion 12 includes a front wall, a left wall, a rear wall, and a right wall connected in sequence, and the air inlet portion 11 is connected to the lower ends of the front wall, the left wall, the rear wall, and the right wall, and the upper surface of the air inlet portion 11 is arranged at an acute angle with the inner surface of the rear wall of the connecting portion 12.

[0052] The front wall of the connecting portion 12 is arranged on the side of the range hood close to the user after the installation of the range hood is completed, and the rear wall of the connecting portion 12 is arranged opposite to the front wall of the connecting portion 12, i.e., the rear wall of the connecting portion 12 is arranged close to the rear wall 22 of the cabinet.

[0053] The above arrangement helps to improve the position stability of the oil guide 10 in the range hood. Specifically, the connecting portion 12 includes a front wall, a left wall, a rear wall and a right wall connected in sequence, which can form a ring-shaped connecting structure and improve the connection stability. Further, the oil leakage hole 130 is further arranged at the lowest end of the air inlet portion 11, which helps to concentrate the oil stains in the oil guide 10 to the oil leakage hole 130, and then guide the oil stains to the vicinity of the rear wall of the connecting portion 12 through the oil leakage hole 130, and then guide the oil stains to the area close to the rear wall of the box 20, which can reduce the influence of air flow on the oil stain guide and facilitate the smooth entry of the oil stain into the oil cup 60.

[0054] In some embodiments, referring to Figure 1 , Figure 2 , Figure 5 , Figure 6 , one end of the flow blocking portion 13 is connected to the hole wall of the oil leakage hole 130, and the other end is inclinedly arranged below the oil leakage hole 130; the projection of the flow blocking portion 13 in the predetermined direction covers at least part of the oil leakage hole 130; the predetermined direction is the air flow direction of the air inlet portion 11.

[0055] The above arrangement is simple in structure and facilitates the realization of the flow blocking effect and oil guiding effect of the flow blocking portion 13. Specifically, in the working state of the range hood, the air flow direction at the air inlet portion 11 is usually from bottom to top, and the above arrangement can make the flow blocking portion 13 located below the oil leakage hole 130, and the projection in the direction from bottom to top covers at least part of the oil leakage hole 130, such as completely covering the oil leakage hole 130 or covering half of the area of the oil leakage hole 130, etc., which can effectively block the impact of air flow on the oil leakage hole 130. Further, since one end of the flow blocking portion 13 is connected to the hole wall of the oil leakage hole 130, and the other end is inclinedly arranged below the oil leakage hole 130, the oil stains can slide down along the surface of the flow blocking portion 13 under the action of gravity, which helps to guide the oil stains to the pre-set flow channel or target position and improve the oil guiding effect.

[0056] For example, referring to Figure 5 , Figure 6 , Figure 5 , Figure 6 shows the flow direction of air flow in the range hood and the oil stain guide path on the inner wall of the connecting piece 40. When the oil leakage hole 130 is arranged close to the rear wall 22 of the box of the range hood, and the other end of the flow blocking portion 13 extends obliquely to the rear wall 22 of the box below the oil leakage hole 130, the flow blocking portion 13 can block the air flow while guiding the oil stains to the rear wall 22 of the box, which facilitates the oil stains to flow to the target position through the rear wall 22 of the box, such as flowing into the oil cup 60 of the range hood.

[0057] In an application scenario, referring to Figure 1An oil leakage hole 130 is provided at least on the air inlet 11. The hole wall of the hole area of ​​the oil leakage hole 130 on the air inlet 11 is folded downward to form one or more flaps, and one or more flaps form a flow baffle 13.

[0058] In some embodiments, the baffle 13 is disposed above the oil drain hole 130, and the projection of the baffle 13 toward a predetermined direction covers at least a portion of the oil drain hole 130; the predetermined direction is parallel to the airflow direction of the air inlet 11.

[0059] For example, see Figure 7 , Figure 8 The area of ​​the connecting part 12 near the oil leakage hole 130 is folded towards the side where the air inlet 11 is located to form a flap, which forms a baffle part 13; for example, see Figure 9 , Figure 10 , Figure 11 The area of ​​the connecting portion 12 near the oil leakage hole 130 protrudes towards the side where the air inlet portion 11 is located, forming a protrusion that forms a baffle portion 13; for example, see [reference needed]. Figure 12 , Figure 13 An oil leakage hole 130 is provided at least on the air inlet 11. The hole wall of the hole area of ​​the oil leakage hole 130 on the air inlet 11 is folded upward to form one or more flaps, and one or more flaps form a flow-blocking part 13.

[0060] In some embodiments, one end of the baffle 13 is connected to the wall of the oil drain hole 130, and the other end is inclined upward toward the oil drain hole 130; the projection of the baffle 13 toward a predetermined direction covers at least a portion of the oil drain hole 130; the predetermined direction is parallel to and opposite to the airflow direction of the air inlet 11.

[0061] The above-mentioned structure is simple and facilitates the flow-blocking effect of the baffle 13. Specifically, when the range hood is in operation, the airflow direction at the air inlet 11 is usually from bottom to top. The above-mentioned arrangement allows the baffle 13 to be located above the oil drain hole 130, and its projection in the top-down direction covers at least a portion of the oil drain hole 130, such as completely covering the oil drain hole 130 or covering half of the oil drain hole 130. This effectively blocks the airflow from impacting the oil stains at the oil drain hole 130 and reduces the risk of oil stains being blown up by the airflow.

[0062] In some embodiments, the oil leakage hole 130 is provided in the connection area between the air inlet 11 and the connecting part 12.

[0063] The oil drain hole 130 is formed by the hole area in the air inlet 11 and the hole area in the connecting part 12. This design can increase the flow area of ​​the oil drain hole 130, enhance the oil discharge effect, and make the oil flow into the oil cup 60 more smoothly.

[0064] In some embodiments, the oil leakage hole 130 is arranged at a connection area of the air inlet part 11 and the connection part 12, one end of the flow blocking part 13 is connected with a hole wall of the hole area of the connection part 12 at the oil leakage hole 130, a projection of the flow blocking part 13 in a predetermined direction covers at least part of the hole area of the air inlet part 11 at the oil leakage hole 130, and the predetermined direction is parallel and opposite to the air flow direction of the air inlet part 11.

[0065] The above arrangement has a simple structure, and the flow blocking part 13 can be arranged on the connection part 12 to facilitate the realization of the flow blocking effect. In an application scenario, one end of the flow blocking part 13 is connected to the hole wall of the hole area of the connection part 12 at the oil leakage hole 130 and extends inwardly to the connection part 12, so that the flow blocking part 13 is arranged above the oil leakage hole 130, and the projection of the flow blocking part 13 in the downward direction covers at least part of the hole area of the air inlet part 11 at the oil leakage hole 130, thereby effectively reducing the impact of the air flow on the oil leakage hole 130.

[0066] In some embodiments, referring to Figure 1 The connection part 12 includes a front wall, a left wall, a rear wall, and a right wall connected in sequence, the air inlet part 11 is connected to the lower ends of the front wall, the left wall, the rear wall, and the right wall, the air inlet part 11 is provided with the first air inlet hole 110, at least one of the front wall, the left wall, and the right wall is provided with the second air inlet hole 120, and the oil leakage hole 130 is arranged at a region of the air inlet part 11 close to the rear wall of the connection part 12 or at a region of the rear wall of the connection part 12 close to the air inlet part 11.

[0067] The structure design can enhance the air inlet efficiency and improve the position stability of the oil guide part 10 in the range hood. Specifically, the connection part 12 includes a front wall, a left wall, a rear wall, and a right wall, which can realize a ring-shaped connection structure and improve the position stability of the oil guide part 10 in the range hood; the air inlet part 11 is connected to the lower ends of the front wall, the left wall, the rear wall, and the right wall, the air inlet part 11 is provided with the first air inlet hole 110, and at least one of the front wall, the left wall, and the right wall is provided with the second air inlet hole 120, so that the air inlet area is increased, the air flow is more uniform, and the oil fume suction effect is improved. The arrangement of the oil leakage hole 130 facilitates the centralized flow guiding of oil stains and reduces the accumulation of oil stains inside.

[0068] In an application scenario, the oil guide part 10 is arranged at the air inlet of the connecting piece 40 of the range hood through the connection part 12. The connection part 12 is designed to include a front wall, a left wall, a rear wall, and a right wall, and the air inlet part 11 is connected to the lower ends of the front wall, the left wall, the rear wall, and the right wall, which can cover the air inlet of the connecting piece 40 in all directions, so that oil stains can be effectively collected from all directions. At least one of the front wall, the left wall, and the right wall is provided with the second air inlet hole 120, which can further reduce the wind resistance, increase the air volume in the flow channel, and improve the exhaust efficiency of oil fumes.

[0069] In some embodiments, referring to Figures 14 to 18, one end of the flow blocking part 13 is connected with the hole wall of the oil leakage hole 130, and the other end extends to the oil cup 60 of the range hood below the oil leakage hole 130.

[0070] This design makes the oil stains directly slide along the flow blocking part 13 to the oil cup 60, which can further improve the cleaning efficiency and overall user experience. Figure 17 、 Figure 18 The airflow path and the oil stain sliding path are shown.

[0071] In some embodiments, one end of the flow blocking part 13 surrounds the outer periphery of the oil leakage hole 130 and is connected with the air inlet part 11; the other end extends to the oil cup 60 of the range hood below the oil leakage hole 130.

[0072] This surrounding design can form a ring-shaped flow blocking and oil guiding structure, enhancing the oil guiding effect and making the oil stains flow smoothly into the oil cup 60.

[0073] In some embodiments, the oil leakage hole 130 is arranged at the connection area of the air inlet part 11 and the connecting part 12, one end of the flow blocking part 13 surrounds the outer periphery of the hole area of the air inlet part 11 of the oil leakage hole 130 and is connected with the air inlet part 11, and the other end extends to the oil cup 60 of the range hood below the oil leakage hole 130.

[0074] In some embodiments, the other end of the flow blocking part 13 can be tightly attached to the oil cup 60, for example, the other end of the flow blocking part 13 is arranged in the oil cup 60, which can make the oil stains enter the oil cup 60 without missing, thereby reducing the cleaning difficulty.

[0075] In some embodiments, the oil leakage hole 130 is arranged at least on the air inlet part 11; one end of the flow blocking part 13 surrounds the outer periphery of the hole area of the air inlet part 11 of the oil leakage hole 130 and is connected with the air inlet part 11, and the other end extends to the oil cup 60 of the range hood below the oil leakage hole 130; the flow blocking part 13 is buckled on the rear wall 22 of the cabinet and cooperates with the rear wall 22 of the cabinet to form a closed flow guiding oil channel.

[0076] The above arrangement can effectively guide the oil stains to flow along the flow blocking part 13 to the oil cup 60, the flow blocking part 13 is buckled on the rear wall 22 of the cabinet and cooperates with the rear wall 22 of the cabinet to form a closed flow guiding oil channel, which can effectively reduce the disturbance of the airflow to the oil stains flowing out of the oil leakage hole 130, so that the oil stains flow smoothly into the oil cup 60; further, this arrangement can shield the oil guiding path on the rear wall 22 of the cabinet, improving the aesthetic appearance.

[0077] In some embodiments, the flow blocking part 13 can be formed by stamping a protruding structure on the connecting part 12 or the air inlet part 11. The height of the protruding structure can be appropriately set according to the size of the oil leakage hole 130 and the blocking effect on the airflow, which can effectively block the airflow and not affect the smooth flow of the oil stains into the oil leakage hole 130. This design can simplify the manufacturing process and reduce production costs.

[0078] In other embodiments, similar improvements can also be made to the oil guide, which will not be described here.

[0079] The present application further provides an extractor hood, as shown in Figures 1 to 21 The extractor hood comprises a box body 20, a rack 30, a connecting piece 40, and an oil guide 10. The box body 20 forms a flow guide cavity and an air inlet communicating with the flow guide cavity; the rack 30 forms an air duct cavity communicating with the flow guide cavity and is internally provided with a fan 50, and the rack 30 is arranged above the box body 20; the connecting piece 40 connects the box body 20 and the rack 30, the air inlet of the connecting piece 40 communicates with the air outlet of the flow guide cavity, the air outlet of the connecting piece 40 communicates with the air inlet of the air duct cavity, and the connecting piece 40, the rack 30, and the box body 20 form a flow channel from the air inlet of the box body 20 to the fan 50; the oil guide 10 is arranged at the air inlet of the connecting piece 40 and is used for guiding the oil dirt on the connecting piece 40.

[0080] The oil guide 10 is arranged in the flow channel of the extractor hood and is used for guiding oil, and the oil guide 10 comprises an air inlet part 11, a connecting part 12, and a flow blocking part 13. The air inlet part 11 is provided with a plurality of first air inlets 110; the connecting part 12 is connected with the air inlet part 11, and the air inlet part 11 and / or the connecting part 12 is / are provided with an oil leakage hole 130; the flow blocking part 13 is connected with the hole wall of the oil leakage hole 130, the projection of the flow blocking part 13 in a predetermined direction covers at least part of the oil leakage hole 130, and the predetermined direction is parallel to the airflow direction of the air inlet part 11.

[0081] The specific embodiments and working principles of the oil guide 10 can be referred to the above embodiments, which will not be described here.

[0082] The oil guide 10 is arranged at the air inlet of the connecting piece 40 and can guide the oil dirt on the inner wall of the connecting piece 40 to a target position, thereby reducing the risk of the oil dirt gathered at the bottom of the connecting piece 40 dripping and splashing in the extractor hood. The air inlet part 11 of the oil guide 10 is provided with a plurality of first air inlets 110, which can reduce the resistance of the oil guide 10 to the airflow, so that the oil fume can be smoothly discharged. Meanwhile, the plurality of first air inlets 110 can form an oil guiding channel therebetween, which can effectively collect the oil dirt, improve the overall cleaning efficiency of the extractor hood, and reduce the cleaning frequency of the user.

[0083] In some embodiments, referring to Figure 3 、 Figure 4 The box body 20 of the extractor hood comprises a box body 21, a rear wall 22 of the box body, and a flow guide plate 23. The flow guide plate 23 is arranged at the front end of the box body 20, the flow guide plate 23 is provided with an air inlet, and the airflow enters the flow guide cavity from the air inlet of the flow guide plate 23. The rack 30 comprises a rack body 31 and a rack front plate 32, and the fan 50 of the extractor hood is arranged in the rack 30. The oil cup 60 is arranged at the bottom of the box body 20.

[0084] In some embodiments, the air inlet portion 11 extends downwardly and obliquely towards the rear wall 22 of the cabinet.

[0085] Specifically, the air inlet portion 11 extends downwardly and obliquely towards the rear wall 22 of the cabinet by a certain angle, which can facilitate the oil stains collected by the oil guide 10 to be guided by the air inlet portion 11 towards the rear wall 22 of the cabinet, so that the oil stains can be collected near the rear wall 22 of the cabinet, facilitating the centralized treatment of the oil stains, for example, by the guiding effect of the oil guide 10, finally flowing into the oil cup 60 of the range hood, achieving effective collection and guiding of the oil stains.

[0086] In some embodiments, referring to Figure 2 , the air inlet portion 11 extends downwardly and obliquely towards the rear wall 22 of the cabinet by a first included angle β.

[0087] Specifically, the air inlet portion 11 extends downwardly and obliquely towards the rear wall 22 of the cabinet by a certain angle, which can facilitate the oil stains collected by the oil guide 10 to be guided by the air inlet portion 11 towards the rear wall 22 of the cabinet, so that the oil stains can be collected near the rear wall 22 of the cabinet, facilitating the centralized treatment of the oil stains, for example, by the guiding effect of the oil guide 10, finally flowing into the oil cup 60 of the range hood, achieving effective collection and guiding of the oil stains.

[0088] In some embodiments, 0° < β < 90°.

[0089] For example, the first included angle β is 10°, 15°, 20°, 22°, 24°, 30°, 35°, 40°, 42°, 45°, 50°, 60°, 80°, or 88°, etc.

[0090] In some embodiments, 5° ≤ β ≤ 60°.

[0091] For example, the first included angle β is 5°, 8°, 10°, 12°, 25°, 30°, 35°, 40°, 46°, 50°, 56°, or 60°, etc.

[0092] Setting the oblique angle of the air inlet portion 11 as the first included angle β in the range of 5° to 60° can further improve the oil guiding effect. Within this angle range, the oil droplets can more easily slide along the inner wall of the air inlet portion 11 and flow towards the rear wall 22 of the cabinet, thereby being more effectively collected and guided.

[0093] In some embodiments, referring to Figure 5 , Figure 6 The connecting portion 12 is annularly arranged on the side of the connecting piece 40 away from the flow channel.

[0094] Figure 5 , Figure 6The flow direction of the airflow in the range hood, the oil stain guide path on the inner wall of the connecting piece 40 is shown. Specifically, the airflow flows into the guide cavity formed by the box body 20 from the air inlet of the box body 20, and then flows through the air inlet part 11 of the oil guide piece 10, the air inlet of the connecting piece 40 in turn, and finally flows into the fan 50 located in the rack 30. When the oil fume airflow flows through the connecting piece 40, the oil droplets carried in the airflow will adhere to the inner wall of the connecting piece 40 to form oil stains. Therefore, the connecting part 12 of the oil guide piece 10 is annularly arranged on the side of the connecting piece 40 away from the flow channel, that is, the connecting part 12 of the oil guide piece 10 is connected with the outer side wall of the connecting piece 40, which can make the oil stains on the inner wall of the connecting piece 40 flow more smoothly to the oil guide piece 10 under the action of gravity.

[0095] In an application scenario, the outer surface of the rear wall of the connecting part 12 is arranged in abutment with the inner surface of the rear wall 22 of the box body, and the inner surface of the rear wall of the connecting part 12 is arranged in abutment with the outer surface of the rear wall of the connecting piece 40. This structure can guide the oil stains on the inner surface of the rear wall of the connecting piece 40 into the oil guide piece 10. In some application scenarios, the rear wall 22 of the box body, the rear wall of the connecting part 12, and the rear wall of the connecting piece 40 can be fixedly connected.

[0096] In some embodiments, the connecting part 12 and the connecting piece 40 are connected through a buckle structure or a bolt structure, etc. The buckle structure can realize quick installation and disassembly of the oil guide piece 10 and the connecting piece 40, and facilitate the user to clean and maintain the oil guide piece 10.

[0097] In some embodiments, the air inlet part extends downwardly at a first included angle β to the rear wall of the box body, 0°<β<90°.

[0098] For example, the first included angle β is 10°, 15°, 20°, 22°, 24°, 30°, 35°, 40°, 42°, 45°, 50°, 60°, 80°, or 88°, etc.

[0099] In some embodiments, 5°≤β≤60°.

[0100] For example, the first included angle β is 5°, 8°, 10°, 12°, 25°, 30°, 35°, 40°, 46°, 50°, 56°, or 60°, etc.

[0101] In some embodiments, refer to Figure 19The air inlet part 11 comprises, in sequence along the first direction x, a first air inlet area 111, a first oil guide area 113, and a second air inlet area 112. The first air inlet area 111 and the second air inlet area 112 are each provided with a first air inlet hole 110. The first oil guide area 113 is located obliquely below the first air inlet area 111 and the second air inlet area 112. The first air inlet area 111 extends downwardly toward a side close to the first oil guide area 113 at a first included angle a1. The second air inlet area 112 extends downwardly toward a side close to the first oil guide area 113 at a second included angle a2. The first air inlet area 111, the first oil guide area 113, and the second air inlet area 112 each extend downwardly toward the rear wall 22 of the box body.

[0102] The structure of dividing the air inlet part 11 into the first air inlet area 111, the first oil guide area 113, and the second air inlet area 112 can more effectively collect and guide oil stains. The first air inlet area 111 and the second air inlet area 112 are each provided with a first air inlet hole 110, which can improve air inlet efficiency. The first oil guide area 113 is located obliquely below the first air inlet area 111 and the second air inlet area 112, which is conducive to the smooth flow of oil stains to the first oil guide area 113 under the action of gravity and the guiding of the first oil guide area 113 toward the rear wall 22 of the box body, facilitating the centralized treatment of oil stains.

[0103] In some embodiments, the first air inlet area 111 extends downwardly toward a side close to the first oil guide area 113 at a second included angle a1. The second air inlet area 112 extends downwardly toward a side close to the first oil guide area 113 at a third included angle a2. 0° < a1 < 90°, and 0° < a2 < 90°.

[0104] For example, the second included angle a1 is 8°, 10°, 20°, 25°, 26°, 30°, 35°, 40°, 43°, 46°, 50°, 60°, 70°, or 86°, etc. The third included angle a2 is 10°, 13°, 20°, 25°, 28°, 30°, 35°, 40°, 50°, 55°, 70°, or 80°, etc.

[0105] In some embodiments, the second included angle a1 and the third included angle a2 are equal. This setting is simple in structure and easy to process, making the oil stains be efficiently guided.

[0106] The downward extension of the first air inlet area 111 and the second air inlet area 112 toward a side close to the first oil guide area 113 at a certain angle can make the oil stains more easily slide along the inner wall of the air inlet part 11 to the first oil guide area 113. The setting of the second included angle a1 and the third included angle a2 can make the oil stains flow smoothly to the first oil guide area 113 under the action of gravity, reducing the retention of oil stains. Further, this setting can make the air inlet part 11 form a conical structure, increase the air inlet area, and improve the air inlet efficiency.

[0107] In some embodiments, 5° ≤ a1 ≤ 60°.

[0108] For example, the second included angle a1 is 5°, 13°, 25°, 30°, 35°, 40°, 45° or 60°, etc.

[0109] In some embodiments, 5°≤a2≤60°.

[0110] For example, the third included angle a2 is 5°, 10°, 20°, 30°, 35°, 40°, 50° or 60°, etc.

[0111] The inclination angle a1 of the first air inlet area 111 and the inclination angle a2 of the second air inlet area 112 are respectively set in the range of 5° to 60°, which can make the oil stains smoothly slide to the first oil guide area 113 under the action of gravity, while taking into account the air inlet efficiency and oil guiding effect.

[0112] In some embodiments, referring to Figure 20 The air inlet part 11 includes the second oil guide area 114, the third air inlet area 115, the fourth air inlet area 116 and the third oil guide area 117 connected in sequence along the first direction x, the third air inlet area 115 and the fourth air inlet area 116 are each provided with a first air inlet hole (not shown in the figure), the second oil guide area 114 is arranged obliquely below the third air inlet area 115, and the third oil guide area 117 is arranged obliquely below the fourth air inlet area 116; wherein the third air inlet area 115 extends downwardly toward the side close to the second oil guide area 114, the fourth air inlet area 116 extends downwardly toward the side close to the third oil guide area 117, and the second oil guide area 114, the third air inlet area 115, the fourth air inlet area 116 and the third oil guide area 117 all extend downwardly toward the rear wall (not shown in the figure) of the box.

[0113] The structure of dividing the air inlet part 11 into the second oil guide area 114, the third air inlet area 115, the fourth air inlet area 116 and the third oil guide area 117 can more effectively collect and guide the oil stains. The third air inlet area 115 and the fourth air inlet area 116 are each provided with a first air inlet hole 110, which can improve the air inlet efficiency and provide a flow guiding path for the oil stains. The second oil guide area 114 is arranged obliquely below the third air inlet area 115, and the third oil guide area 117 is arranged obliquely below the fourth air inlet area 116, which is conducive to the oil stains in the third air inlet area 115 flowing to the second oil guide area 114 under the action of gravity, the oil stains in the fourth air inlet area 116 flowing to the third oil guide area 117 under the action of gravity, and the oil stains being guided toward the rear wall 22 of the box through the second oil guide area 114 and the third oil guide area 117, which facilitates the centralized treatment of the oil stains. This arrangement can make the air inlet part 11 form a conical structure, increase the air inlet area and improve the air inlet efficiency.

[0114] In some embodiments, referring to Figure 21The air inlet part 11 comprises an air inlet plate provided with first air inlet holes (not shown in the figure), and the air inlet plate extends downwardly and obliquely towards the rear wall (not shown in the figure) of the box.

[0115] The air inlet part 11 is designed as an air inlet plate provided with first air inlet holes, the air inlet plate is in a plate structure, and the air inlet plate extends downwardly and obliquely towards the rear wall of the box, so that the structure of the oil guide part 10 can be simplified, the manufacturing cost can be reduced, and a good oil guiding effect can be maintained. The oblique air inlet plate design is conducive to the oil stains sliding along the air inlet plate under the action of gravity to the vicinity of the rear wall of the box and finally being guided to the oil cup 60.

[0116] In some embodiments, referring to Figures 14 to 18 The oil leakage hole 130 is arranged on the air inlet part 11, one end of the flow blocking part 13 surrounds the oil leakage hole 130 and is located outside the hole area of the air inlet part 11, and the other end extends to the oil cup 60 of the range hood below the oil leakage hole 130; the flow blocking part 13 is buckled on the rear wall 22 of the box and cooperates with the rear wall 22 of the box to form a closed flow guide channel.

[0117] The above arrangement can effectively guide the oil stains to flow to the oil cup 60 along the flow blocking part 13, the flow blocking part 13 is buckled on the rear wall 22 of the box and cooperates with the rear wall 22 of the box to form a closed flow guide channel, which can effectively reduce the disturbance of the airflow to the oil stains flowing out of the oil leakage hole 130, so that the oil stains can smoothly flow into the oil cup 60; further, this arrangement can shield the oil guiding path on the rear wall of the box 20, and improve the aesthetic appearance.

[0118] In some embodiments, referring to Figure 16 The flow blocking part 13 and the hole wall of the oil leakage hole 130 are detachably connected. This facilitates the user to disassemble and clean according to the actual needs, and improves the maintenance convenience.

[0119] In some embodiments, the range hood comprises a box 20, a frame 30, a connecting piece 40, and an oil guide 10. The box 20 forms a flow guide cavity and an air inlet communicating with the flow guide cavity; the frame 30 forms an air duct cavity communicating with the flow guide cavity and is internally provided with a fan 50, and the frame 30 is arranged above the box 20; the connecting piece 40 connects the box 20 and the frame 30, the air inlet of the connecting piece 40 communicates with the air outlet of the flow guide cavity, the air outlet of the connecting piece 40 communicates with the air inlet of the air duct cavity, and the connecting piece 40, the frame 30, and the box 20 form a flow channel from the air inlet of the box 20 to the fan 50; the oil guide 10 is arranged at the air inlet of the connecting piece 40 and is used for guiding oil dirt on the connecting piece 40. The oil guide 10 comprises an air inlet part 11 and a connecting part 12, the air inlet part 11 is provided with a plurality of first air inlets 110; the connecting part 12 is connected with the air inlet part 11, and the air inlet part 11 is provided with an oil leakage hole 130. The oil guide 10 further comprises a flow blocking part 13, the flow blocking part 13 is connected with the hole wall of the oil leakage hole 130, the flow blocking part 13 covers at least part of the oil leakage hole 130 in the projection in a predetermined direction, and the predetermined direction is parallel to the airflow direction of the air inlet part 11.

[0120] The connecting part 12 comprises a front wall, a left wall, a rear wall, and a right wall connected in sequence, the air inlet part 11 is connected to the lower end of the front wall, the left wall, the rear wall, and the right wall, and the upper surface of the air inlet part 11 is arranged at an acute angle with the inner surface of the rear wall of the connecting part 12; the oil leakage hole 130 is arranged at the lowest end of the air inlet part 11. The oil leakage hole 130 is arranged in the region of the air inlet part 11 close to the rear wall of the connecting part 12.

[0121] The outer surface of the rear wall of the connecting part 12 is arranged in abutment with the inner surface of the rear wall 22 of the box, and the inner surface of the rear wall of the connecting part 12 is arranged in abutment with the outer surface of the rear wall of the connecting piece 40.

[0122] This structure can guide the oil dirt on the rear wall of the connecting piece 40 into the oil guide 10; further, since the oil leakage hole 130 is arranged in the region of the air inlet part 11 close to the rear wall of the connecting part 12, the above arrangement can also rapidly guide the oil dirt through the oil leakage hole 130 to the rear wall 22 of the box, so that the oil dirt can flow to the oil cup 60 through the rear wall 22 of the box, reducing the risk of oil dirt dripping. In some application scenarios, the rear wall 22 of the box, the rear wall of the connecting part 12, and the rear wall of the connecting piece 40 can be fixedly connected.

[0123] One end of the flow blocking part 13 is connected with the hole wall of the oil leakage hole 130, and the other end extends obliquely downward of the oil leakage hole 130 toward the rear wall 22 of the box. Under this arrangement, the flow blocking part 13 can play a role in blocking flow and guiding oil, and can guide the oil dirt to the rear wall 22 of the box.

[0124] In other embodiments, similar improvements can also be made to the oil guide, which will not be described again.

[0125] Different from the prior art, the oil guide part of the application is arranged in the flow channel of the range hood for guiding oil, and the oil guide part comprises an air inlet part, a connecting part and a flow blocking part. The air inlet part is provided with a plurality of first air inlet holes. The connecting part is connected with the air inlet part, and the air inlet part and / or the connecting part is provided with an oil leakage hole. The flow blocking part is connected with the hole wall of the oil leakage hole, and the projection of the flow blocking part in a predetermined direction covers at least part of the oil leakage hole, and the predetermined direction is parallel to the airflow direction of the air inlet part. In the above manner, the oil fume airflow flows through the flow channel inside the range hood, the oil guide part is arranged in the flow channel of the range hood, the airflow flows through the air inlet part of the oil guide part, the connecting part of the oil guide part is used to fix the oil guide part in the range hood, and the oil stains in the flow channel can be guided to the target position through the oil guide part and the oil leakage hole on the oil guide part. Therefore, this arrangement can guide and collect the oil stains inside the range hood, reduce the risk of random dripping and flying of the oil stains inside the range hood, further, the flow blocking part is arranged on the oil guide part, and the flow blocking part is connected with the hole wall of the oil leakage hole, and the projection of the flow blocking part in a direction parallel to the airflow direction covers at least part of the oil leakage hole, which can block the airflow at the oil leakage hole, reduce the interference of the airflow on the oil guiding process at the oil leakage hole, reduce the risk of the oil stains being blown by the airflow when flowing out of the oil guide part through the oil leakage hole, and reduce the cleaning difficulty.

[0126] It is worth noting that the drawings herein are only used to show the structural relationship and connection relationship of the product of the application, and do not limit the specific structure size of the product of the application.

[0127] The above is only an embodiment of the application, and does not limit the patent scope of the application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the application.

Claims

1. An oil guide member disposed in a flow passage of a range hood for guiding oil, characterized by, The oil guide piece comprises: an air inlet part provided with a plurality of first air inlet holes; a connecting part connected to the air inlet part, and the air inlet part and / or the connecting part is provided with an oil leakage hole; a flow blocking part connected to the hole wall of the oil leakage hole, and the projection of the flow blocking part in a predetermined direction covers at least part of the oil leakage hole; the predetermined direction is parallel to the air flow direction of the air inlet part.

2. The oil guide according to claim 1, characterized by The upper surface of the air inlet part is arranged at an acute angle with the inner surface of the connecting part; the oil leakage hole is arranged at the lowest end of the air inlet part.

3. The oil guide according to claim 2, characterized by One end of the flow blocking part is connected to the hole wall of the oil leakage hole, and the other end is arranged inclined upward of the oil leakage hole; The predetermined direction is parallel and opposite to the air flow direction of the air inlet part.

4. The oil guide according to claim 2, characterized by One end of the flow blocking part is connected to the hole wall of the oil leakage hole, and the other end is arranged inclined downward of the oil leakage hole; The predetermined direction is the air flow direction of the air inlet part.

5. The oil guide according to claim 3 or 4, characterized in that The oil leakage hole is arranged at the connecting area of the air inlet part and the connecting part.

6. The oil guide according to claim 2, wherein The oil leakage hole is arranged at the connecting area of the air inlet part and the connecting part, one end of the flow blocking part is connected to the hole wall of the oil leakage hole at the hole area of the connecting part, and the projection of the flow blocking part in a predetermined direction covers at least part of the oil leakage hole at the hole area of the air inlet part; the predetermined direction is parallel and opposite to the air flow direction of the air inlet part.

7. The oil guide according to claim 1, wherein The connecting part comprises a front wall, a left wall, a rear wall and a right wall connected in sequence, the air inlet part is connected to the lower end of the front wall, the left wall, the rear wall of the connecting part and the right wall, the air inlet part is provided with the first air inlet hole, at least one of the front wall, the left wall and the right wall is provided with a second air inlet hole, and the oil leakage hole is arranged at the area of the air inlet part close to the rear wall of the connecting part or at the area of the rear wall of the connecting part close to the air inlet part.

8. The oil guide according to claim 2, characterized by One end of the flow blocking part is connected to the hole wall of the oil leakage hole, and the other end extends downward of the oil leakage hole to the oil cup of the range hood.

9. A range hood characterized by, The oil guide piece comprises: a box forming a flow guide cavity and an air inlet communicating with the flow guide cavity; a rack forming an air duct cavity communicating with the flow guide cavity and internally provided with a fan, the rack being arranged above the box; a connecting piece connecting the box and the rack, the air inlet of the connecting piece communicating with the air outlet of the flow guide cavity, the air outlet of the connecting piece communicating with the air inlet of the air duct cavity, the connecting piece, the rack and the box forming a flow channel from the air inlet of the box to the fan; The oil guide piece of any one of claims 1 to 8, a cover is arranged at the air inlet of the connecting piece for guiding oil dirt on the connecting piece.

10. The hood according to claim 9, characterized in that, The air inlet part extends downwardly and obliquely towards the rear wall of the box.

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