Air outlet cover for range hood and range hood

Abstract

The air outlet cover comprises a cover body, the cover body is provided with a first peripheral wall which extends vertically and forms an air outlet channel, and an air inlet formed in the lower end of the first peripheral wall is used for being communicated with a fan outlet in the extractor hood; the upper part of the connecting ring is connected with a smoke outlet pipe, and the lower part of the connecting ring is provided with a second peripheral wall extending downwards; the valve plate is arranged in the cover body and used for opening or closing the air outlet channel; the second peripheral wall of the connecting ring is arranged on the inner periphery of the upper end of the first peripheral wall in the circumferential direction, and the second peripheral wall and the first peripheral wall are arranged at intervals to form an annular gap. The lower portion of the connecting ring is further provided with a blocking wall extending outwards from the outer circumferential face of the second circumferential wall, the blocking wall is supported on the edge of the upper end of the first circumferential wall, and the blocking wall and the first circumferential wall are attached to each other. The utility model can reduce the risk of oil leakage.

Description

Technical Field

[0001] This utility model belongs to the field of kitchen appliance technology, specifically relating to an exhaust hood for a range hood and a range hood. Background Technology

[0002] The air outlet of a conventional range hood is usually connected to the exhaust pipe through an exhaust hood to expel the fumes. The oil separated from the fumes flows back into the range hood through the exhaust hood and is collected in the oil cup at the bottom of the range hood.

[0003] Existing exhaust hoods, such as the Chinese invention patent application number 201710383129.9 entitled "A Self-Sealing Exhaust Hood for Preventing Backdraft and Odor Transfer" (authorization announcement number CN107975840B) and the Chinese invention patent application number 201710383275.1 entitled "A Exhaust Hood for Preventing Backdraft and Odor Transfer" (authorization announcement number CN107975841B), disclose structures including a hood body, a connecting ring, and a valve plate. The connecting ring includes an installation part and a flue pipe connection part located above the installation part. The lower end of the installation part extends into the inside of the cover and is fixed to the cover. The flue pipe connection part is used to install the flue pipe. The valve plate is installed inside the cover. When the valve plate is closed, it covers the air outlet of the range hood. When the range hood is working, the valve plate opens the air outlet to let out air. When the range hood is not working, the blade closes by its own weight, and the valve plate rests on the cover to form a seal, thereby preventing the backflow of oil fumes in the common flue outside the air outlet.

[0004] The existing air vent covers have the following problems:

[0005] 1. The outer circumferential surface of the existing connecting ring is attached to the inner circumferential surface of the air outlet shroud. Oil stains will crawl upward from the mating surface of the two through capillary action, resulting in oil leakage.

[0006] Second, to ensure the ultra-thin appearance of the range hood and to meet the space requirements for easy operation by service technicians, the outer diameter of the exhaust hood should not be too large. However, to improve the air performance of the range hood, the inner diameter of the exhaust hood needs to be increased. Therefore, the challenge is how to increase the inner diameter of the exhaust hood while ensuring the normal operation of the oil circuit within the exhaust hood and improving air performance, given the limited outer diameter. Summary of the Invention

[0007] The first technical problem to be solved by this utility model is to provide an exhaust hood for a range hood that avoids oil leakage caused by oil stains climbing upwards along the mating surface between the outer circumferential surface of the connecting ring and the inner circumferential surface of the exhaust hood due to capillary action.

[0008] The second technical problem to be solved by this utility model is to provide an exhaust hood for a range hood, so as to increase the inner diameter of the exhaust hood when the outer diameter of the exhaust hood is limited, thereby improving air performance while ensuring the normal operation of the oil circuit inside the exhaust hood.

[0009] The third technical problem to be solved by this utility model is to provide a range hood with the above-mentioned exhaust hood.

[0010] The technical solution adopted by this utility model to solve the first technical problem mentioned above is: an exhaust hood for a range hood, comprising:

[0011] The cover has a vertically extending first peripheral wall that forms an air outlet channel, and the air inlet formed at the lower end of the first peripheral wall is used to connect with the fan outlet inside the range hood.

[0012] A connecting ring, the upper part of which is used to connect with the smoke outlet pipe, and the lower part of which has a second peripheral wall extending downward;

[0013] A valve plate, located inside the cover, is used to open or close the air outlet channel;

[0014] Its features are:

[0015] The second circumferential wall of the connecting ring is disposed circumferentially on the upper inner perimeter of the first circumferential wall, and the two are arranged at intervals to form an annular gap.

[0016] The lower part of the connecting ring also has a baffle extending outward from the outer periphery of the second peripheral wall, the baffle being supported on the upper edge of the first peripheral wall and the two being in contact.

[0017] During use, the oil can flow downwards along the second circumferential wall of the connecting ring. Since the baffle on the second circumferential wall is supported on the first circumferential wall, an annular gap is formed between the second circumferential wall and the first circumferential wall. The existence of this annular gap can prevent the oil from climbing upwards between the second circumferential wall and the first circumferential wall through capillary action, thus preventing oil leakage.

[0018] Preferably, the distance between the second peripheral wall and the first peripheral wall is ≥5mm. This distance can further prevent capillary action.

[0019] Preferably, the connecting ring further has a side peripheral wall extending upward from the outer periphery of the baffle, the outer peripheral surface of the side peripheral wall being aligned with the outer peripheral surface of the upper end of the first peripheral wall, so that tape can be wrapped around the outer periphery of both.

[0020] To ensure the proper position of the second peripheral wall of the connecting ring, preferably, at least two outwardly extending ribs are provided at circumferential intervals on the outer peripheral surface of the second peripheral wall of the connecting ring. Each rib is located below the baffle wall, and the outer end of each rib contacts the first peripheral wall. The design of the ribs ensures that the second peripheral wall and the outer ring wall are always in a spaced-out arrangement.

[0021] Preferably, the upper part of the connecting ring has a third peripheral wall extending upward from the upper edge of the second peripheral wall, a second bottom wall extending inward from the inner circumference of the third peripheral wall, and a fourth wall extending upward from the inner side of the second bottom wall. The fourth wall is in a circumferentially extending arc shape, and there are at least two fourth walls arranged at circumferential intervals. The fourth wall, the third peripheral wall, and the second bottom wall together form an upward-facing mounting groove for the lower end of the smoke outlet pipe to be inserted into. In use, oil passing between two adjacent fourth walls of the mounting groove can flow downward along the second peripheral wall into the air outlet channel.

[0022] To better collect oil and facilitate its downward flow, the cover preferably also has a vertically extending inner annular wall. This inner annular wall is circumferentially located within the upper part of the first circumferential wall, and its lower edge connects to the first circumferential wall via a first bottom wall to form an upward-opening annular oil collection groove. This groove allows the second circumferential wall of the connecting ring to be inserted into the annular oil collection groove through the opening. The bottom of the annular oil collection groove has an oil outlet hole that connects to an air outlet channel. In use, the oil flows along the second circumferential wall into the annular oil collection groove and then passes through the oil outlet hole.

[0023] Preferably, the second peripheral wall of the connecting ring is relatively close to the inner ring wall of the annular oil collecting groove and relatively far from the first peripheral wall, so that the distance between the second peripheral wall and the first peripheral wall is greater than the distance between the second peripheral wall and the inner ring wall. This allows for a reasonable arrangement of the second peripheral wall within the limited space of the annular oil collecting groove, ensuring oil collection while preventing oil leakage.

[0024] Furthermore, the lower end of the second peripheral wall of the connecting ring is spaced apart from the first bottom wall of the annular oil collecting groove. This ensures that the baffle on the connecting ring can be stably supported on the first peripheral wall and guarantees the flow of oil in the annular oil collecting groove.

[0025] Furthermore, the first bottom wall of the annular oil collecting groove is provided with the aforementioned oil outlet hole that penetrates the wall thickness.

[0026] Furthermore, the enclosure is also provided with an annular oil collecting groove arranged circumferentially along the first peripheral wall. The oil collecting groove is located below the annular oil collecting groove, and the top opening of the oil collecting groove is opposite to the oil outlet. Thus, the oil collecting groove can collect the oil flowing down from the oil outlet.

[0027] Preferably, the outer wall of the oil receiving groove is the first peripheral wall, and the inner wall of the oil receiving groove is provided with a notch to allow oil in the oil receiving groove to pass through;

[0028] The valve plate is configured to rotate about a pivot that extends radially along the first peripheral wall. When the valve plate closes the air outlet channel, the edge of the valve plate is supported on the inner wall of the oil receiving groove. The annular oil collecting groove is located outside the rotation path of the edge of the valve plate.

[0029] To further solve the second technical problem mentioned above, preferably, the outer diameter D of the outer wall of the oil receiving groove is 198~200mm, the interval t1 between the outer wall and the inner wall of the oil receiving groove is 6~8mm, the interval t2 between the first peripheral wall and the inner ring wall is 6~8mm, and the vertical distance h between the inner wall of the oil receiving groove and the first bottom wall of the annular oil collecting groove in the vertical direction is denoted as h, satisfying:

[0030] h=((D / 2- t1+j) 2 -(D / 2- t2) 2 ) 1 / 2

[0031] Where j is 3~5mm.

[0032] This invention maximizes the inner diameter of the air outlet shroud by increasing the h value, thus improving air performance and ensuring the normal operation of the oil circuit.

[0033] In this invention, increasing the h value causes the upward-flowing airflow to directly hit the oil outlet of the annular oil collecting groove, resulting in whistling noise and other problems. Therefore, preferably, vertically extending guide plates are provided at the positions of each oil outlet within the oil collecting groove. The back of the guide plates faces the outer wall of the oil collecting groove, and the two are spaced apart to form a space. The top of the space faces the oil outlet to allow the oil flowing out of the outlet to pass through. The front of the guide plates faces the notch on the inner wall of the oil collecting groove. The guide plate design isolates the airflow and oil path, preventing direct impact of the airflow on the oil outlet, and the airflow is smoothed over the front of the guide plate, improving airflow performance. Furthermore, the oil path is located between the back of the guide plate and the outer wall of the oil collecting groove, which, while avoiding whistling noise, demonstrates the ingenuity of the oil path design and reduces the impact of airflow on oil flow.

[0034] Furthermore, the center of the back of the guide plate is connected to the outer wall of the oil receiving groove via a vertically extending rib, the upper end of which is opposite to the oil outlet. The design of the rib and the guide plate improves the structural strength of the cover.

[0035] The technical solution adopted by this utility model to solve the third technical problem mentioned above is: a range hood, characterized in that it also has an exhaust hood as described above.

[0036] Compared with the prior art, the advantages of this utility model are as follows: When in use, the oil can flow downward along the second peripheral wall of the connecting ring, and since the baffle on the second peripheral wall is supported on the first peripheral wall, the second peripheral wall and the first peripheral wall are arranged at intervals to form an annular gap. The existence of this annular gap can prevent the oil from climbing upward from between the second peripheral wall and the first peripheral wall through capillary action and causing oil leakage. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of an air hood with a smoke outlet pipe installed according to an embodiment of the present invention (the valve plate opens the air outlet channel).

[0038] Figure 2 for Figure 1 A cross-sectional view of an air hood with a smoke exhaust pipe installed in the middle;

[0039] Figure 3 for Figure 1 Another cross-sectional view of the exhaust hood with the smoke exhaust pipe installed in the middle;

[0040] Figure 4 for Figure 1 Another cross-sectional view of the exhaust hood with the exhaust pipe installed in the middle;

[0041] Figure 5 for Figure 1 An exploded 3D view of an air hood with a smoke exhaust pipe installed in the center;

[0042] Figure 6 This is a cross-sectional view of a portion of the air outlet hood in an embodiment of the present invention, omitting the connecting ring (valve plate closes the air outlet channel). Detailed Implementation

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0044] like Figures 1-6 As shown, this utility model provides an exhaust hood for a range hood and a preferred embodiment of the range hood. The exhaust hood includes a hood body 1, a connecting ring 2, and a valve plate 4.

[0045] The hood 1 has a vertically extending first peripheral wall 10 forming an air outlet channel 100. An air inlet 10a formed at the lower end of the first peripheral wall 10 is used to communicate with the fan outlet inside the range hood. The hood 1 also has a vertically extending inner ring wall 111, which is circumferentially located on the inner perimeter of the upper end of the first peripheral wall 10. The lower edge of the inner ring wall 111 is joined to the first peripheral wall 10 through a first bottom wall 113 to form an upward-opening annular oil collection groove 11. The first bottom wall 113 of the annular oil collection groove 11 has at least two oil outlet holes 1130 that penetrate its own wall thickness at intervals along the circumferential direction to connect the annular oil collection groove 11 with the air outlet channel 100.

[0046] Meanwhile, the cover 1 is also provided with an annular oil receiving groove 12 arranged circumferentially along the first peripheral wall 10. The oil receiving groove 12 is located below the annular oil collecting groove 11, and the top opening of the oil receiving groove 12 is opposite to the oil outlet hole 1130, which is used to collect the oil flowing down from the oil outlet hole 1130. In this embodiment, the outer wall forming the oil receiving groove 12 is the first peripheral wall 10, and the inner wall 122 forming the oil receiving groove 12 is provided with at least two notches 1220 spaced circumferentially to allow the oil in the oil receiving groove 12 to pass through and enter the air outlet channel 100. Meanwhile, vertically extending guide plates 13 are provided in the oil receiving tank 12 at the positions corresponding to each oil outlet 1130. The back of the guide plates 13 faces the outer wall of the oil receiving tank 12 and the two are spaced apart to form a space. The top of the space is opposite to the oil outlet 1130 to allow the oil flowing out of the oil outlet 1130 to pass through. The front of the guide plates 13 faces the notch 1220 on the inner wall 122 of the oil receiving tank 12. The back center of the guide plates 13 is connected to the outer wall of the oil receiving tank 12 by a vertically extending rib 131, and the upper end of the rib 131 is opposite to the oil outlet 1130.

[0047] In this embodiment, the outer diameter D of the first peripheral wall 10 is 198~200mm (D can be any value between 198~200mm, such as 198, 199, 200mm, etc.), the interval t1 between the outer wall and the inner wall 122 of the oil receiving groove 12 is 6~8mm (t1 can be any value between 6~8mm, such as 6, 7, 8mm, etc.), the interval t2 between the first peripheral wall 10 and the inner ring wall 111 is 6~8mm (t2 can be any value between 6~8mm, such as 6, 7, 8mm, etc., t2 can be the same as t1 or different), and the vertical distance h between the inner wall 122 of the oil receiving groove 12 and the first bottom wall 113 of the annular oil collecting groove 11 in the vertical direction is recorded as: h=((D / 2- t1+j) 2 -(D / 2-t2) 2 ) 1 / 2 Where j is 3~5mm. Taking the inner ring wall 111 with an inner diameter of 180mm as an example, the corresponding h is 18~28mm.

[0048] The valve plate 4 is disposed inside the cover 1 in a manner that allows it to rotate about a pivot 41 extending radially along the first circumferential wall 10. It is used to open or close the air outlet passage 100. When the valve plate 4 closes the air outlet passage 100, the edge of the valve plate 4 is supported on the inner wall 122 of the oil collecting groove 12. The annular oil collecting groove 11 is located outside the rotation path of the edge of the valve plate 4. The valve plate, the pivot, and the way they are coupled in this embodiment are all prior art and will not be described in detail here.

[0049] The connecting ring 2 is vertically arranged, and its lower part has a downwardly extending second peripheral wall 21, a baffle wall 22 extending outward from the outer peripheral surface of the second peripheral wall 21, and a side peripheral wall 23 extending upward from the outer peripheral edge of the baffle wall 22. The second peripheral wall 21 is inserted into the annular oil collecting groove 11 through an opening, and the lower end of the second peripheral wall 21 of the connecting ring 2 is spaced apart from the first bottom wall 113 of the annular oil collecting groove 11. The baffle wall 22 is supported on the upper edge of the first peripheral wall 10, and the two are in close contact. The outer peripheral surface of the side peripheral wall 23 is aligned with the upper outer peripheral surface of the first peripheral wall 10, so that sealing tape can be wrapped around the outer periphery of both. The second peripheral wall 21 and the upper end of the first peripheral wall 10 are spaced apart to form an annular gap, and the spacing distance is ≥5mm. The second peripheral wall 21 and the inner annular wall 111 of the annular oil collecting groove 11 are also spaced apart to form an annular gap. In this embodiment, the second peripheral wall 21 of the connecting ring 2 is relatively close to the inner annular wall 111 of the annular oil collecting groove 11 and relatively far away from the first peripheral wall 10, so that the interval between the second peripheral wall 21 and the first peripheral wall 10 is greater than the interval between the second peripheral wall 21 and the inner annular wall 111. In order to further define the position of the second peripheral wall 21, at least two outwardly extending ribs 211 are provided circumferentially at intervals on the outer peripheral surface of the second peripheral wall 21. Each rib 211 is located below the baffle wall 22, and the outer end of each rib 211 contacts the first peripheral wall 10 of the annular oil collecting groove 11.

[0050] The upper part of the connecting ring 2 is used to connect with the smoke outlet pipe 3. Specifically, the upper part of the connecting ring 2 has a third peripheral wall 24 extending upward from the upper edge of the second peripheral wall 21, a second bottom wall 25 extending inward from the inner peripheral surface of the third peripheral wall 24, and a fourth wall 26 extending upward from the inner side of the second bottom wall 25. The fourth wall 26 is an arc extending circumferentially, and there are at least two fourth walls 26 arranged at intervals along the circumferential direction. The fourth walls 26, the third peripheral wall 24, and the second bottom wall 25 together form an upward-facing mounting groove 20 for the lower end of the smoke outlet pipe 3 to be inserted into.

[0051] The range hood in this embodiment includes the existing range hood body and the above-mentioned exhaust hood. The hood 1 is located on the exhaust port at the top of the range hood body so that the air inlet 10a of the hood 1 is connected to the exhaust port. The specific connection structure is the same as the prior art and will not be described in detail here.

[0052] In the working state of the fume extraction system, the airflow blows out from the exhaust hood towards exhaust pipe 3, and the oil stains are distributed according to... Figure 2 The oil flows downwards in the direction indicated by the middle arrow: Under its own gravity, the oil in the side wall of the exhaust pipe 2 flows downwards. First, it flows down along the second circumferential wall 21 between the adjacent fourth wall 26 of the mounting groove 20 to the annular oil collection groove 11. Then, it flows downwards through the oil outlet 1130. After that, it flows downwards along the ribs 131 of the guide plate 13 and collects in the oil receiving groove 12. Then, it passes through the notch 1220 on the inner wall 122 of the oil receiving groove 12 and finally flows downwards into the range hood until it reaches the oil cup.

[0053] In the specification and claims of this utility model, terms indicating direction, such as "upper," "lower," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0054] The term "vertical" is also used in the specification and claims of this utility model, meaning basically along the up and down direction, and is not limited to just the vertical direction, but can also be slightly deviated from the vertical direction.

[0055] The term "radial" is also used in the specification and claims of this utility model, meaning basically along the inside and outside direction, and is not limited to the radial direction that passes through the center of the circle, but can also be slightly deviated from the radial direction.

Claims

1. An exhaust hood for a range hood, comprising: The cover (1) has a vertically extending first peripheral wall (10) forming an air outlet channel (100), and the air inlet (10a) formed at the lower end of the first peripheral wall (10) is used to communicate with the fan outlet inside the range hood; The connecting ring (2) has an upper part for connecting to the smoke outlet pipe (3) and a lower part having a downwardly extending second circumferential wall (21); A valve plate (4) is provided inside the cover (1) for opening or closing the air outlet channel (100); Its features are: The second peripheral wall (21) of the connecting ring (2) is disposed circumferentially on the upper inner perimeter of the first peripheral wall (10), and the two are arranged at intervals to form an annular gap; The lower part of the connecting ring (2) also has a baffle (22) extending outward from the outer periphery of the second peripheral wall (21), the baffle (22) being supported on the upper edge of the first peripheral wall (10), and the two being in contact.

2. The air outlet hood according to claim 1, characterized in that: The distance between the second peripheral wall (21) and the first peripheral wall (10) is ≥5mm.

3. The air outlet hood according to claim 1, characterized in that: The connecting ring (2) also has a side peripheral wall (23) extending upward from the outer periphery of the baffle (22), the outer peripheral surface of the side peripheral wall (23) being aligned with the outer peripheral surface of the upper end of the first peripheral wall (10) so that the tape can be wrapped around the outer periphery of both.

4. The air outlet hood according to claim 1, characterized in that: At least two outwardly extending ribs (211) are provided on the outer peripheral surface of the second peripheral wall (21) of the connecting ring (2) at circumferential intervals. Each rib (211) is located below the baffle (22), and the outer end of each rib (211) is in contact with the first peripheral wall (10).

5. The air outlet hood according to claim 1, characterized in that: The upper part of the connecting ring (2) has a third peripheral wall (24) extending upward from the upper edge of the second peripheral wall (21), a second bottom wall (25) extending inward from the inner peripheral surface of the third peripheral wall (24), and a fourth wall (26) extending upward from the inner side of the second bottom wall (25). The fourth wall (26) is in the shape of a circumferentially extending arc, and there are at least two fourth walls (26) arranged at intervals along the circumferential direction. The fourth wall (26), the third peripheral wall (24), and the second bottom wall (25) together form an upward-facing mounting groove (20) for the lower end of the smoke outlet pipe (3) to be inserted therein.

6. The air outlet hood according to any one of claims 1 to 5, characterized in that: The cover (1) also has a vertically extending inner ring wall (111), which is circumferentially located on the inner periphery of the upper end of the first peripheral wall (10). The lower edge of the inner ring wall (111) is joined to the first peripheral wall (10) through the first bottom wall (113) to form an upward-facing annular oil collection groove (11), so that the second peripheral wall (21) of the connecting ring (2) can be inserted into the annular oil collection groove (11) through the opening. The bottom of the annular oil collection groove (11) is provided with an oil outlet hole (1130) that connects to the air outlet channel (100).

7. The air outlet hood according to claim 6, characterized in that: The second peripheral wall (21) of the connecting ring (2) is relatively close to the inner ring wall (111) of the annular oil collecting groove (11) and relatively far away from the first peripheral wall (10), so that the interval between the second peripheral wall (21) and the first peripheral wall (10) is greater than the interval between the second peripheral wall (21) and the inner ring wall (111).

8. The air outlet hood according to claim 6, characterized in that: The lower end of the second peripheral wall (21) of the connecting ring (2) is spaced apart from the first bottom wall (113) of the annular oil collecting groove (11).

9. The air outlet hood according to claim 6, characterized in that: The first bottom wall (113) of the annular oil collecting groove (11) is provided with the aforementioned oil outlet hole (1130) that penetrates the wall thickness.

10. The air outlet hood according to claim 9, characterized in that: The cover (1) is also provided with an annular oil receiving groove (12) arranged circumferentially along the first peripheral wall (10). The oil receiving groove (12) is located below the annular oil collecting groove (11), and the top opening of the oil receiving groove (12) is opposite to the oil outlet (1130).

11. The air outlet hood according to claim 10, characterized in that: The outer wall of the oil receiving groove (12) is the first peripheral wall (10), and the inner wall (122) of the oil receiving groove (12) is provided with a notch (1220) to allow the oil in the oil receiving groove (12) to pass through; The valve plate (4) is arranged in such a way that it can rotate about a pivot (41) extending radially along the first peripheral wall (10). When the valve plate (4) closes the air outlet channel (100), the edge of the valve plate (4) is supported on the inner wall (122) of the oil receiving groove (12). The annular oil collecting groove (11) is located outside the rotation path of the edge of the valve plate (4).

12. The air outlet hood according to claim 11, characterized in that: The outer diameter D of the outer wall of the oil receiving groove (12) is 198~200mm, the interval t1 between the outer wall and the inner wall (122) of the oil receiving groove (12) is 6~8mm, the interval t2 between the first peripheral wall (10) and the inner ring wall (111) is 6~8mm, and the vertical distance h between the inner wall (122) of the oil receiving groove (12) and the first bottom wall (113) of the annular oil collecting groove (11) in the vertical direction is recorded as: h=((D / 2- t1+j) 2 -(D / 2- t2) 2 ) 1 / 2 Where j is 3~5mm.

13. The air outlet hood according to claim 11, characterized in that: The oil receiving groove (12) is provided with vertically extending guide plates (13) at the positions corresponding to each oil outlet (1130). The back of the guide plates (13) faces the outer wall of the oil receiving groove (12) and the two are spaced apart to form a space. The top of the space is opposite to the oil outlet (1130) so that the oil flowing out of the oil outlet (1130) can pass through. The front of the guide plates (13) faces the notch (1220) on the inner wall (122) of the oil receiving groove (12).

14. The air outlet hood according to claim 13, characterized in that: The back center of the guide plate (13) is connected to the outer wall of the oil receiving groove (12) by a vertically extending rib (131), and the upper end of the rib (131) is opposite to the oil outlet (1130).

15. A range hood, characterized in that... It also has an air outlet shroud as described in any one of claims 1 to 14.

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