Air outlet oil guide structure and range hood with same
By setting oil guide surface and oil discharge holes on the air outlet connector of the hood, combined with the oil discharge pipe and maintenance cover, the problem of uncontrollable oil return direction at the air outlet of the hood is solved, and the effective collection of oil and fluid is achieved Convenient maintenance of equipment.
Patent Information
- Application Number
- CN202421137601.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-23
AI Technical Summary
The flow direction of the oil flowing back at the air outlet of the existing hood is uncontrollable, making it difficult to collect the oil.
Design an oil conduction structure at the air outlet, including setting an oil conduction surface on the air outlet joint, whose height is lower than the air inlet and exhaust port, equipped with an oil discharge hole and an oil discharge pipe, and the oil flows into the oil discharge pipe through the oil conduction surface. Directly return to the bellows to avoid return through the air inlet and facilitate disassembly and cleaning through the maintenance cover.
Effectively control the direction of oil reflow, facilitate collection, and simplify the installation and maintenance of air outlet joints, improving the convenience of users to clean and replace the oil drain pipes.
Smart Images
Figure CN222256762U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of kitchen appliances, and in particular to an air outlet oil guide structure and a range hood having the same. Background Art
[0002] Hoods usually refer to range hoods in the kitchen, also known as range hoods, range hoods or exhaust hoods. Hoods are kitchen appliances used to absorb and remove oil smoke, steam, smoke and odors generated during cooking. Hoods are mainly installed above kitchen stoves. Hoods can effectively reduce oil fume pollution in the kitchen, keep the kitchen air fresh, and protect the health of cooks.
[0003] At present, when the existing range hood is in use, after the oil smoke is sucked into the range hood, the oil smoke is discharged into the exhaust pipe through the air outlet joint of the range hood and then discharged. The oil liquid formed by the oil smoke in the air outlet joint flows back along the inner wall surface of the air outlet, and then flows back to the air outlet of the range hood and then flows back into the air collecting chamber of the range hood. However, the direction of the oil liquid flowing back from the air outlet of the existing range hood is uncontrollable when flowing to the air collecting chamber of the range hood, which makes it inconvenient to collect the oil liquid in the air outlet joint. Utility Model Content
[0004] The utility model provides an air outlet oil guide structure and a range hood having the same, so as to solve the problem that the flow direction of the oil refluxed at the air outlet of the existing range hood is uncontrollable when flowing to the air collecting chamber of the range hood.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an air outlet oil guide structure for a range hood, comprising:
[0006] The range hood body comprises an air collecting box, wherein the air collecting box is provided with an air outlet;
[0007] An air outlet joint, comprising an air inlet and an air outlet, wherein the air inlet is connected to the air outlet, the air outlet is connected to a smoke exhaust pipe, the air outlet joint has an oil guide surface, the height of the oil guide surface is lower than the heights of the air inlet and the air outlet, and an oil drain hole is provided at the lowest point of the oil guide surface;
[0008] An oil drain pipe, whose oil inlet end is connected to the oil drain hole and whose oil outlet end is connected to the air collecting box, is used to introduce the oil on the oil guide surface into the air collecting box.
[0009] According to one embodiment of the utility model, a connecting hole is provided on the side wall surface of the air collecting box, and an oil drain joint extends outward from the connecting hole and protrudes from the side wall of the air collecting box. The oil discharged from the oil drain pipe enters the air collecting box through the oil drain joint and flows along the inner wall of the air collecting box.
[0010] According to one embodiment of the utility model, the air outlet joint includes an air inlet chamber and an air exhaust chamber, the air inlet chamber is connected to the air exhaust chamber, the air inlet chamber has the air inlet, the air exhaust chamber has the air exhaust port, the bottom surface height of the air exhaust chamber is lower than the height of the air inlet, and forms the oil guide surface of the air outlet joint.
[0011] According to one embodiment of the utility model, the plane where the air inlet is located is perpendicular to the plane where the air outlet is located, and the plane where the air exhaust cavity is connected to the air outlet end of the air inlet cavity is parallel to the plane where the air outlet is located.
[0012] According to one embodiment of the utility model, the top surface of the air inlet cavity is formed by extending the top surface of the exhaust cavity, and the side surface of the air inlet cavity away from the exhaust cavity is arc-shaped, and the arc-shaped side surface is tangent to the top surface of the exhaust cavity at the connection between the two.
[0013] According to one embodiment of the utility model, a guide plate is provided in the air inlet cavity, and the guide plate is arc-shaped, with one end facing the air inlet and the other end facing the air outlet of the air inlet cavity.
[0014] According to an embodiment of the present utility model, the curvature of the curved side surface is adapted to the curvature of the guide plate.
[0015] According to an embodiment of the utility model, a purification module is provided in the exhaust cavity, and the oil drain hole is located upstream of the purification module in the exhaust cavity.
[0016] The utility model also discloses a range hood, which adopts the oil guide structure for the air outlet as described in any of the above items, and also includes a maintenance cover plate, which is arranged around the air collecting box, and the oil outlet end of the oil drain pipe passes through the side plate of the maintenance cover plate to connect to the air collecting box.
[0017] According to one embodiment of the utility model, two side panels opposite to each other on the left and right sides of the maintenance cover are provided with easily removable panels, and the easily removable panels are discontinuously connected to the side panels of the maintenance cover. By removing the easily removable panel on one of the side panels, the exhaust cavity can be extended out of the side panel on the corresponding side of the maintenance cover.
[0018] Compared with the prior art, the oil guide structure of the air outlet of the utility model and the range hood having the same have at least the following advantages:
[0019] The utility model discloses an oil guide structure for an air outlet, through the arrangement of a range hood main body, an air outlet joint and an oil drain pipe, an oil guide surface is arranged on the air outlet joint, and the height of the oil guide surface is lower than the heights of the air inlet and the exhaust port, the oil smoke enters the air outlet of the air collecting box of the range hood main body and is discharged, when the oil smoke condenses with oil in the air outlet joint, the oil guide surface guides the oil, and the oil flows on the oil guide surface under the action of its own gravity, so that the oil flows from the oil drain hole into the oil drain pipe, and the oil flows toward the air collecting box along the oil drain pipe, so that the oil in the air outlet joint can directly flow back to the air collecting box, avoiding the oil from flowing back through the air inlet, and thus being able to better control the reflux direction of the oil, so as to better collect the oil in the air outlet joint.
[0020] The utility model provides a range hood that prevents oil from flowing back through the air inlet when the user is using the range hood, by providing the oil guide structure at the air outlet and the maintenance cover, thereby better controlling the direction of oil flow back so as to better collect the oil in the air outlet joint. At the same time, by providing the maintenance cover, it is not only convenient for the user to quickly disassemble the maintenance cover and then quickly install the air outlet joint, which is convenient for installation or maintenance of the air outlet joint, but also convenient for removing the oil drain pipe so as to facilitate the user to clean or replace the oil drain pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the specific implementation of the utility model, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.
[0022] Figure 1 The utility model is an exploded view of the structure of an air outlet oil guide structure and a range hood having the same.
[0023] Figure 2 It is a structural schematic diagram of an air outlet oil guiding structure in an air outlet oil guiding structure of the utility model.
[0024] Figure 3 The utility model is a schematic structural diagram of an air outlet oil guide structure and a range hood having the same.
[0025] Reference numerals:
[0026] Hood body 1, air collecting box 11, air outlet 111, oil drain joint 112, air outlet joint 2, air inlet chamber 21, air inlet 211, guide plate 212, air exhaust chamber 22, air exhaust port 221, oil guide surface 222, oil drain hole 2221, oil drain pipe 3, purification module 4, maintenance cover 5, easily removable plate 51. DETAILED DESCRIPTION
[0027] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.
[0028] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0029] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0030] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:
[0031] See also Figures 1 to 3 The utility model provides an air outlet oil guide structure for a range hood. The air outlet oil guide structure 111 comprises a range hood body 1, an air outlet joint 2 and an oil drain pipe 3.
[0032] The range hood body 1 includes an air collecting box 11, which is provided with an air outlet 111. In this embodiment, when the user uses the range hood, after the oil smoke enters the air collecting box 11 of the range hood body 1, the oil smoke can be discharged from the air outlet 111 of the air collecting box 11.
[0033] The air outlet joint 2 includes an air inlet 211 and an air outlet 221, wherein the air inlet 211 is connected to the air outlet 111, and the air outlet 221 is connected to the smoke exhaust pipe, and the air outlet joint 2 has an oil guide surface 222, wherein the height of the oil guide surface 222 is lower than the heights of the air inlet 211 and the air outlet 221, and an oil discharge hole 2221 is provided at the lowest point of the oil guide surface 222. During use by the user, the oil smoke enters the air inlet 211 from the air outlet 111 of the air collecting box 11, and through the setting of the oil guide surface 222, since the height of the oil guide surface 222 is lower than the heights of the air inlet 211 and the air outlet 221, the oil liquid condensed by the oil smoke in the air outlet joint 2 flows on the oil guide surface 222, and then the oil liquid is guided by the oil guide surface 222, so that the oil liquid flows to the oil discharge hole 2221 and then flows out.
[0034] The oil inlet end of the oil drain pipe 3 is connected to the oil drain hole 2221, and the oil outlet end thereof is connected to the air collecting box 11, so as to introduce the oil on the oil guide surface 222 into the air collecting box 11. Through the setting of the oil drain pipe 3, after the oil flows out from the oil drain hole 2221, the oil flows into the oil drain pipe 3, and the oil is guided to the air collecting box 11 through the oil drain pipe 3, so that the oil in the air outlet joint 2 can directly flow back to the air collecting box 11, and the oil does not flow back through the air inlet 211, thereby controlling the reflux direction of the oil, so as to better collect the oil.
[0035] The utility model sets an oil guiding surface 222 on the air outlet joint 2, and the height of the oil guiding surface 222 is lower than the heights of the air inlet 211 and the air outlet 221. When the user uses the range hood, after the oil smoke enters the air collecting box 11 of the range hood body 1, the oil smoke is discharged from the air outlet 111 of the air collecting box 11. When the oil smoke condenses with oil in the air outlet joint 2, the oil guiding surface 222 guides the oil, and the oil flows on the oil guiding surface 222 due to its own gravity, so that the oil flows from the oil discharge hole 2221 into the oil discharge pipe 3, and the oil flows along the oil discharge pipe 3 to the air collecting box 11, so that the oil in the air outlet joint 2 can directly flow back to the air collecting box 11, avoiding the oil from flowing back through the air inlet 211, and thus can better control the reflux direction of the oil, so as to better collect the oil in the air outlet joint 2.
[0036] Based on the above examples, please refer to Figure 1 and Figure 2In other embodiments, a connecting hole is provided on the side wall of the air collecting box 11, and an oil drain joint 112 protruding from the side wall of the air collecting box 11 extends outward from the connecting hole, and the oil discharged from the oil drain pipe 3 enters the air collecting box 11 through the oil drain joint 112 and flows along the inner wall of the air collecting box 11. Through the setting of the connecting hole and the oil drain joint 112, when the user uses the range hood, the oil flows along the oil drain pipe 3 to the oil drain joint 112, and then flows through the connecting hole to the inner wall of the air collecting box 11, so that the oil in the air outlet joint 2 can directly flow back to the air collecting box 11, avoiding the oil from flowing back through the air inlet 211. At the same time, the user can also easily disassemble the oil drain pipe 3 from the oil drain joint 112, so that the user can clean or replace the oil drain pipe 3.
[0037] Based on the above examples, please refer to Figure 1 and Figure 2 In other embodiments, the air outlet joint 2 includes an air inlet chamber 21 and an air outlet chamber 22, the air inlet chamber 21 is connected to the air outlet chamber 22, the air inlet chamber 21 has the air inlet 211, the air outlet chamber 22 has the air outlet 221, the bottom surface of the air outlet chamber 22 is lower than the air inlet 211, and forms the oil guide surface 222 of the air outlet joint 2. By making the bottom surface of the air outlet chamber 22 lower than the air inlet 211 and the height of the air outlet 221, and forming the oil guide surface 222 of the air outlet joint 2, when the user uses oil smoke, the oil smoke enters the air outlet chamber 22 through the air outlet 221 of the air inlet chamber 21, and the oil liquid formed by the condensation of the oil smoke in the air outlet chamber 22 flows in the oil guide surface 222, thereby preventing the oil liquid from flowing back through the air outlet 221 of the air outlet chamber 22.
[0038] Based on the above examples, please refer to Figure 1 and Figure 2 In other embodiments, the plane where the air inlet 211 is located is perpendicular to the plane where the air outlet 221 is located, and the plane where the air outlet end of the exhaust cavity 22 and the air inlet cavity 21 are connected is parallel to the plane where the air outlet 221 is located. By making the plane where the air inlet 211 of the air inlet chamber 21 is located perpendicular to the plane where the air outlet 221 of the exhaust chamber 22 is located, and the plane connecting the exhaust chamber 22 and the air outlet end of the air inlet chamber 21 is parallel to the plane where the air outlet 221 is located, when the user is using the range hood, the oil smoke passes through the air outlet 111 of the range hood and enters the air inlet chamber 21 through the air inlet 211 of the air inlet chamber 21, and the oil smoke then enters the exhaust chamber 22 from the air outlet end of the air inlet chamber 21 and is discharged. In the process of the oil smoke passing through the air inlet chamber 21 and the exhaust chamber 22, the upward air outlet is converted into the left or right air outlet, so that the direction of the oil smoke flow is changed, and the oil smoke does not flow vertically upward, thereby avoiding bending of the exhaust pipe connected to the air outlet joint 2, which is convenient for installation and use by users on low floors.
[0039] Based on the above examples, please refer to Figure 1 and Figure 2 In other embodiments, the top surface of the air inlet chamber 21 is formed by extending the top surface of the exhaust chamber 22, and the side surface of the air inlet chamber 21 away from the exhaust chamber 22 is arc-shaped, and the arc-shaped side surface is tangent to the top surface of the exhaust chamber 22 at the connection between the two. In this embodiment, the side surface of the air inlet chamber 21 away from the right side of the exhaust chamber 22 is arc-shaped (that is, the side surface of the air inlet chamber 21 close to the left side of the exhaust chamber 22 is arc-shaped), and the arc-shaped side surface is tangent to the top surface of the exhaust chamber 22 at the connection between the two. With the arc-shaped air inlet chamber 21, when there is too much oil smoke, after the oil smoke enters the range hood, the oil smoke passes through the air outlet 111 of the range hood and enters the arc surface of the air inlet chamber 21 through the air inlet 211 of the air inlet chamber 21, and the arc surface guides the oil smoke, so that the oil smoke passes through the air inlet chamber 21 more smoothly and enters the exhaust chamber 22. At the same time, because the plane where the air inlet 211 is located is perpendicular to the plane where the air outlet 221 is located, and the plane connecting the air outlet end of the exhaust chamber 22 and the air inlet chamber 21 is parallel to the plane where the air outlet 221 is located, when the oil smoke passes through the air inlet chamber 21 and the exhaust chamber 22, the upward air outlet is converted into the left or right air outlet, thereby smoothly changing the direction of the oil smoke flow. By setting the side of the air inlet chamber 21 away from the exhaust chamber 22 to an arc shape, the oil smoke is prevented from gathering in the air inlet chamber 21.
[0040] Based on the above examples, please refer to Figure 1 and Figure 2 In other embodiments, a guide plate 212 is provided in the air inlet cavity 21. The guide plate 212 is arc-shaped, with one end facing the air inlet 211 and the other end facing the air outlet of the air inlet cavity 21. In this embodiment, the guide plate 212 may be a guide blade, and a plurality of guide blades may be provided at intervals; for example, the guide blades are provided as two, and the two guide blades are provided at intervals; specifically, the lower end of the arc-shaped guide plate 212 faces the air inlet 211, and the upper end of the arc-shaped guide plate 212 faces the air outlet of the air inlet cavity 21. Through the setting of the guide plate 212, when the user is using the range hood, after the oil smoke enters the range hood, the oil smoke passes through the air outlet 111 of the range hood and enters the air inlet chamber 21 through the air inlet 211 of the air inlet chamber 21. The guide plate 212 guides the oil smoke, and the oil smoke then enters the exhaust chamber 22 from the air outlet end of the air inlet chamber 21, thereby smoothly guiding the oil smoke through the air inlet chamber 21 into the exhaust chamber 22, changing the direction of the oil smoke flow, and the oil smoke does not flow vertically upwards. At the same time, it can effectively reduce the resistance of the arc-shaped air inlet chamber 21 to the oil smoke, improve the efficiency of the oil smoke passing through the air inlet chamber 21, and achieve an increase in the discharge speed of the oil smoke when there is too much oil smoke.
[0041] Based on the above examples, please refer to Figure 1 and Figure 2 In other embodiments, the curvature of the curved side surface matches the curvature of the guide plate 212. In this embodiment, the curvature of the curved side surface of the air inlet chamber 21 is the same as the curvature of the guide plate 212, so that the oil smoke is guided by the curved surface of the air inlet chamber 21 and the guide plate 212, reducing the resistance of the curved air inlet chamber 21 to the oil smoke, and the oil smoke can enter the exhaust chamber 22 more smoothly.
[0042] Based on the above examples, please refer to Figure 1 and Figure 2 In other embodiments, a purification module 4 is provided in the exhaust cavity 22, and the oil discharge hole 2221 is located upstream of the purification module 4 in the exhaust cavity 22. Through the arrangement of the purification module 4, when the user uses the range hood, the oil smoke discharged from the range hood is purified through the purification module 4, thereby achieving air purification and preventing the discharged oil smoke from polluting the environment.
[0043] The utility model also provides a range hood, see Figure 1 and Figure 3 , including a maintenance cover 5 and the oil guide structure of the air outlet 111 described in any one of the above items. The maintenance cover 5 is arranged around the air collecting box 11, and the oil outlet end of the oil drain pipe 3 passes through the side plate of the maintenance cover 5 to connect to the air collecting box 11. By setting the oil guide structure of the air outlet 111, when the user uses the range hood, the oil can be prevented from flowing back through the air inlet 211, and the reflux direction of the oil can be better controlled, so as to better collect the oil in the air outlet joint 2. At the same time, by setting the maintenance cover 5, when the user needs to clean or replace the air outlet joint 2, it is not only convenient for the user to quickly disassemble the maintenance cover 5 and then quickly install the air outlet joint 2, so as to facilitate the cleaning or maintenance of the air outlet joint 2, but also convenient to remove the oil drain pipe 3, so as to facilitate the user to clean or replace the oil drain pipe 3.
[0044] Based on the above examples, please refer to Figure 1 and Figure 2 In other embodiments, easily removable plates 51 are provided on the two side panels of the maintenance cover 5 that are arranged opposite to each other on the left and right sides. The easily removable plates 51 are intermittently connected to the side panels of the maintenance cover 5. By removing the easily removable plates 51 on one side panel, the exhaust chamber 22 can be extended out of the side panel on the corresponding side of the maintenance cover 5. Easily removable plates 51 are provided on the two side panels of the maintenance cover 5 that are arranged opposite to each other on the left and right sides, so that when the user installs the air outlet connector 2, the easily removable plates 51 that interfere can be quickly removed, thereby facilitating the disassembly or maintenance of the air outlet connector 2. At the same time, when the user needs to clean or replace the oil drain pipe 3, the easily removable plates 51 that interfere can be removed, thereby facilitating the removal of the oil drain pipe 3 from the air outlet connector 2, so that the user can clean or replace the oil drain pipe 3.
[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.
Claims
1. An air outlet oil guide structure for a range hood, characterized in that: include: A range hood body (1) comprises an air collecting box (11), wherein the air collecting box (11) is provided with an air outlet (111); An air outlet joint (2), comprising an air inlet (211) and an air outlet (221), wherein the air inlet (211) is connected to the air outlet (111), and the air outlet (221) is connected to a smoke exhaust pipe, and the air outlet joint (22) has an oil guide surface (222), the height of the oil guide surface (222) is lower than the heights of the air inlet (211) and the air outlet (221), and an oil discharge hole (2221) is provided at the lowest point of the oil guide surface (222); An oil drain pipe (3) has an oil inlet end connected to the oil drain hole (2221) and an oil outlet end connected to the air collecting box (11), and is used to introduce the oil on the oil guide surface (222) into the air collecting box (11).
2. The air outlet oil guide structure according to claim 1, characterized in that: A connecting hole is provided on the side wall of the air collecting box (11), and an oil drain joint (112) extends outward from the connecting hole and protrudes from the side wall of the air collecting box (11). The oil discharged from the oil drain pipe (3) enters the air collecting box (11) through the oil drain joint (112) and flows along the inner wall of the air collecting box (11).
3. The air outlet oil guide structure according to claim 1, characterized in that: The air outlet joint (2) comprises an air inlet chamber (21) and an air outlet chamber (22); the air inlet chamber (21) is in communication with the air outlet chamber (22); the air inlet chamber (21) has the air inlet port (211); the air outlet chamber (22) has the air outlet port (221); the bottom surface of the air outlet chamber (22) is lower than the bottom surface of the air inlet port (211), and forms an oil guide surface (222) of the air outlet joint (2).
4. The air outlet oil guide structure according to claim 3, characterized in that: The plane where the air inlet (211) is located is perpendicular to the plane where the air outlet (221) is located, and the plane where the air outlet cavity (22) is connected to the air outlet end of the air inlet cavity (21) is parallel to the plane where the air outlet (221) is located.
5. The air outlet oil guide structure according to claim 3, characterized in that: The top surface of the air inlet cavity (21) is formed by extending the top surface of the air exhaust cavity (22), and the side surface of the air inlet cavity (21) away from the air exhaust cavity (22) is arc-shaped, and the arc-shaped side surface is tangent to the top surface of the air exhaust cavity (22) at the connection between the two.
6. The air outlet oil guide structure according to claim 5, characterized in that: A guide plate (212) is provided in the air inlet cavity (21); the guide plate (212) is arc-shaped, with one end facing the air inlet (211) and the other end facing the air outlet end of the air inlet cavity (21).
7. The air outlet oil guide structure according to claim 6, characterized in that: The curvature of the curved side surface matches the curvature of the guide plate (212).
8. The air outlet oil guide structure according to claim 3, characterized in that: A purification module (4) is provided in the exhaust cavity (22), and the oil discharge hole (2221) is located upstream of the purification module (4) in the exhaust cavity (22).
9. A range hood, using the air outlet oil guide structure according to any one of claims 1 to 8, characterized in that: It also comprises a maintenance cover plate (5), wherein the maintenance cover plate (5) is arranged around the air collecting box (11), and the oil outlet end of the oil drain pipe (3) passes through the side plate of the maintenance cover plate (5) and is connected to the air collecting box (11).
10. The range hood according to claim 9, characterized in that: The maintenance cover (5) is provided with easily removable plates (51) on two side plates arranged opposite to each other on the left and right sides. The easily removable plates (51) are intermittently connected to the side plates of the maintenance cover (5). By removing the easily removable plate (51) on one side plate, the exhaust cavity (22) can be extended out of the side plate on the corresponding side of the maintenance cover (5).