Air outlet connector and air draft device with same

Abstract

The air outlet connector comprises a connector body and an oil blocking piece, an air outlet channel is formed in the connector body, a first supporting seat and a second supporting seat are arranged on the inner side wall face of the air outlet channel, rotating seats are arranged on the first supporting seat and the second supporting seat, and the oil blocking piece is arranged on the rotating seats. The oil blocking piece is rotationally connected to the rotating seat, the two ends of the oil blocking piece are supported by the first supporting seat and the second supporting seat respectively, when no oil smoke enters the air outlet channel, the two ends of the oil blocking piece are supported by the first supporting seat and the second supporting seat respectively, and the downward projection of the oil blocking piece covers the air suction opening of the air suction device; according to the air outlet connector, the oil blocking piece is arranged and can rotate, the oil blocking piece can block oil drops dripping towards the air suction opening when the air draft device stops running, when the air draft device runs, the oil blocking piece is turned upwards, the air blocking area is reduced, and the resistance of the oil blocking piece to airflow flowing through the air outlet channel is reduced as much as possible; and the air draft efficiency of the air draft device is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, and in particular to an air outlet joint and an air exhaust device having the same. Background Art

[0002] The range hood is arranged above the kitchen stove and is used to extract and discharge the fumes generated during the cooking process when the user is cooking. The exhaust device includes an air collection component, a connecting pipe and a power component. The air outlet of the air collecting component is connected to the power component through a connecting pipe. The air collecting component is provided with an air inlet and an air outlet, and the downward projection of the air outlet covers part of the air inlet; when the exhaust device is working, the power component is started, and the power component forms a negative pressure in the air collecting component. The external oil smoke is sucked in through the air suction port of the air collecting component and discharged to the connecting pipe through the air outlet. When the exhaust device is turned off, the oil in the power component and the oil in the connecting pipe will flow downward along the connecting pipe. When entering the air outlet of the air collecting component, it will be guided by the air outlet to flow into the smoke collecting chamber of the air collecting box assembly, and then discharged through the oil guide hole at the bottom of the smoke collecting chamber. However, when the air outlet joint guides oil, oil droplets will drip downward through the air outlet, and then drip through the part that is aligned with the air outlet and the air suction port. When the oil droplets fall on the stove or cooker, it affects the user experience. Utility Model Content

[0003] The purpose of the utility model is to provide an air outlet joint and an air exhaust device having the same, which are used to solve the above-mentioned technical problems.

[0004] An air outlet joint, used for an exhaust device, comprises a joint body and an oil baffle, wherein the joint body has an air outlet channel inside, and the inner wall surface of the air outlet channel is provided with a first support seat and a second support seat, and the first support seat and the second support seat are provided with a swivel seat; the oil baffle is rotatably connected to the swivel seat, and its two ends are respectively supported by the first support seat and the second support seat; wherein, when no oil smoke enters the air outlet channel, the two ends of the oil baffle are respectively supported by the first support seat and the second support seat, and the downward projection of the oil baffle covers the air suction port of the exhaust device; when oil smoke flows out through the air outlet channel, the oil smoke exerts a force on the oil baffle from the lower surface of the oil baffle, and the oil baffle rotates around the swivel seat and flips upward.

[0005] According to one embodiment of the utility model, both ends of the oil baffle are provided with avoidance parts, the edges of the avoidance parts are provided with support members extending upward, and a rotating shaft extends from the sides of the support members facing away from each other, and the rotating shaft is rotatably connected in the rotating seat.

[0006] According to one embodiment of the utility model, when oil smoke flows out through the air outlet channel, the oil smoke exerts a force on the oil baffle plate from the lower surface of the oil baffle plate, and the rear edge of the oil baffle plate flips upward and the front edge flips downward.

[0007] According to an embodiment of the present utility model, the length of the part of the oil baffle located in front of its rotation center is less than the distance from the lower surface of the oil baffle to the first support seat / the second support seat.

[0008] According to an embodiment of the present utility model, on the side where the first support seat and the second support seat are close to each other, there is also a limit block, and the limit block is used to limit the rotation angle of the oil baffle.

[0009] According to an embodiment of the present utility model, after the leading edge of the oil baffle abuts against the limit block, the included angle between the oil baffle and the horizontal direction is 75° to 80°.

[0010] According to an embodiment of the present utility model, a oil guiding part extends backward from the rear side edge of the oil baffle. The width of the oil guiding part gradually becomes smaller in the left - right direction and is smaller than the width of the corresponding position of the air outlet channel. The rear edge of the oil guiding part is turned up to form an oil blocking part.

[0011] According to an embodiment of the present utility model, a first annular wall extends upward from the outlet end of the air outlet channel of the joint body. A second annular wall surrounding the first annular wall and a third annular wall surrounding the second annular wall extend upward from the upper surface of the joint body. A first oil guiding groove is formed between the first annular wall and the second annular wall. A second oil guiding groove is formed between the second annular wall and the third annular wall. The second oil guiding groove is communicated with the first oil guiding groove. The first oil guiding groove is communicated with the wall surface of the air outlet channel. When both ends of the oil baffle are supported by the first support seat and the second support seat respectively, the part of the oil guiding part close to the oil blocking part and the oil blocking part are supported on the first annular wall.

[0012] According to an embodiment of the present utility model, the first oil guiding groove has an oil outlet, and diversion grooves extend downward along the inner side wall surface of the air outlet channel on both sides of the oil outlet. The wall surface of the air outlet channel between the outlets of the first oil guiding groove forms an oil guiding surface, and the downward projection of the oil guiding surface is located behind the suction port of the air extraction device.

[0013] An air extraction device using the above - mentioned air outlet joint includes a power component, a wind collecting component and a connecting pipe. The wind collecting component is provided with a suction port and an air outlet. The joint body is connected to the air outlet. The downward projection of the oil baffle covers the suction port. The power component has an air inlet and an air outlet. The air inlet end of the connecting pipe is connected to the joint body, and the air outlet end of the connecting pipe is connected to the air inlet of the power component.

[0014] Compared with the prior art, the air outlet joint of the present utility model has the following advantages:

[0015] The air outlet joint of the utility model is designed with an oil baffle plate that can rotate in the air outlet channel. The oil baffle plate can not only block the oil drops dripping toward the air suction port when the exhaust device stops operating, but also when the exhaust device is operating and there is airflow blowing from bottom to top in the air outlet channel, the oil baffle plate flips upward to reduce the windshield area, minimize the resistance of the oil baffle plate to the airflow flowing through the air outlet channel, and ensure the exhaust efficiency of the exhaust device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the air outlet connector of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the air outlet connector of the utility model;

[0018] Figure 3 for Figure 2 A partial enlarged view of the dotted circle portion;

[0019] Figure 4 A schematic cross-sectional view of a portion of the structure of the air outlet connector of the utility model;

[0020] Figure 5 A schematic diagram of the structure cross section of the air outlet joint of the utility model after the oil baffle plate is rotated;

[0021] Figure 6 It is a structural schematic diagram of an air exhaust device having an air outlet connector of the utility model;

[0022] Figure 7 It is a schematic structural diagram of an exhaust device having an air outlet connector of the utility model from another perspective.

[0023] In the figure: 1. Joint body; 11. First support seat; 111. Rotating seat; 112. Limiting block; 12. Second support seat; 13. First annular wall; 14. Second annular wall; 15. Third annular wall; 16. First oil guide groove; 17. Second oil guide groove; 18. Guide groove; 2. Oil baffle plate; 21. Avoidance part; 22. Support member; 23. Oil guide part; 24. Oil baffle part; 3. Rotating shaft; 4. Power assembly; 5. Wind collecting assembly; 51. Air inlet; 6. Connecting pipe.

[0024] The realization of the functions and advantages of the utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will disclose multiple embodiments of the present utility model in diagrams. For the sake of clear illustration, many practical details will be described together in the following narrative. However, it should be understood that these practical details are not used to limit the present utility model. That is to say, in some embodiments of the present utility model, these practical details are not necessary. In addition, for the purpose of simplifying the diagrams, some conventional structures and components will be shown in a simple schematic manner in the diagrams.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the attached drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0027] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes, and do not particularly refer to the order or sequence, nor are they used to limit the present utility model. They are merely 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 quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0028] In order to further understand the content, features and effects of the present utility model, the following embodiments are exemplified and described in detail in conjunction with the attached drawings as follows:

[0029] The present utility model discloses an air outlet joint and an air extraction device having the same. The air extraction device is, for example, a range hood. Please refer to Figure 6 and Figure 7, the exhaust device includes a power component 4, an air collecting component 5 and a connecting pipe 6. The air collecting component 5 is provided with an air suction port 51 and an air outlet. The joint body 1 is connected to the air outlet. The power component 4 has an air inlet and an air outlet. The air inlet end of the connecting pipe 6 is connected to the joint body 1, and the air outlet end of the connecting pipe 6 is connected to the air inlet of the power component 4. The air collecting component 5 has an air collecting cavity, and the air suction port 51 and the air outlet are communicated with the air collecting cavity. When the exhaust device works, the power component 4 operates, and the air flow enters the air collecting cavity of the air collecting component 5 from the air suction port 51, then is discharged through the air outlet, and flows along the joint body 1 and the connecting pipe 6. Finally, it enters the power component 4 through the air outlet end of the connecting pipe 6 and is then discharged by the power component 4. During the process of the exhaust device sucking oil fume, when the oil fume flows along the joint body 1 and the connecting pipe, the mixture of oil and water in the oil fume will adhere to the inner wall of the joint body 1 and the inner wall surface of the connecting pipe, and then flow downward. The power component 4 has a turbine cavity. When the power component 4 works, the mixture of oil and water in the oil fume will be thrown to the inner wall of the turbine cavity. When the power component 4 stops operating, the mixture of oil and water will be discharged into the connecting pipe along the outlet of the turbine cavity and then flow downward along the connecting pipe.

[0030] Please refer to Figure 1 and Figure 2 , the air outlet joint disclosed in the present application includes a joint body 1 and an oil baffle 2. The joint body 1 has an air outlet channel inside. The inner side wall surface of the air outlet channel is provided with a first support seat 11 and a second support seat 12. The first support seat 11 and the second support seat 12 are both provided with a rotating seat 111. The oil baffle 2 is rotatably connected to the rotating seat 111, and its two ends are respectively supported by the first support seat 11 and the second support seat 12. For the air outlet joint of the present utility model, when it is applied to the exhaust device, when the exhaust device stops operating and there is no oil fume entering the air outlet channel, the two ends of the oil baffle 2 are respectively supported by the first support seat 11 and the second support seat 12, and the part of the downward projection of the air outlet channel that is aligned with the air suction port 41 of the exhaust device is covered by the oil baffle 2. When the oil liquid in the connecting pipe drips downward through the air outlet channel, at the part that is aligned with the oil baffle 2, the oil droplets are blocked by the oil baffle 2 and cannot drip through the air suction port 41, which can prevent the oil droplets in the connecting pipe from dripping onto the stove or cooking utensils through the air suction port 41; when the exhaust device works, the power component 4 operates, and the air flow enters the air collecting cavity of the air collecting component 5 from the air suction port 51 and is then discharged through the air outlet. The oil fume discharged through the air outlet enters the air outlet channel of the joint body 1 and then flows upward. When the oil fume flows upward, the oil fume exerts a force on the lower surface of the oil baffle 2, and the oil baffle 2 rotates around the rotating seat 111 and flips upward, so that the air flow can smoothly be discharged through the air outlet channel into the connecting pipe 6, then flows along the connecting pipe 6 and enters the turbine cavity of the power component 4, and finally is discharged from the turbine cavity.

[0031] In the air outlet joint of the utility model, the oil baffle 2 in the air outlet channel is provided with a downward projection to cover the air inlet 51 of the exhaust device, so when oil droplets drip downward in the air outlet channel, the oil droplets are received by the oil baffle 2, preventing the oil droplets from dripping from the air inlet 51 to the outside of the exhaust device. In addition, the oil baffle 2 is rotatably installed in the air outlet channel, so that when the oil smoke flows out through the air outlet channel, the oil smoke exerts a force on the oil baffle 2 from the lower surface of the oil baffle 2, and the oil baffle 2 rotates around the rotating seat 111 and flips upward, reducing the obstruction of the oil smoke.

[0032] In the air outlet joint of the utility model, the oil baffle plate 2 is designed to be rotatable in the air outlet channel. The oil baffle plate 2 can not only block the oil drops dripping toward the air suction port 51 when the exhaust device stops running, but also when the exhaust device is running and there is airflow blowing from bottom to top in the air outlet channel, the oil baffle plate 2 flips upward to reduce the windshield area, thereby reducing the resistance of the oil baffle plate 2 to the airflow passing through the air outlet channel as much as possible, thereby ensuring the exhaust efficiency of the exhaust device.

[0033] In the air outlet connector of the utility model, please refer to Figure 1 and Figure 2 , the two ends of the oil baffle 2 are provided with avoidance parts 21, and the edge of the avoidance part 21 is extended upward with a support member 22, and the side of the support member 22 that is away from each other extends with a rotating shaft 3, and the rotating shaft 3 is rotatably connected in the rotating seat 111. When oil smoke flows through the air outlet channel, the oil smoke exerts an upward force on the oil baffle 2, and the oil baffle 2 rotates and causes the rotating shaft 3 to rotate in the rotating seat 111, so that the part of the air outlet channel blocked by the oil baffle 2 is opened, which can reduce the resistance of the oil baffle 2 to the airflow flowing through the air outlet channel.

[0034] In other embodiments, the rotating shaft 3 is rotatably connected to the support member 22, the support members 22 at both ends of the oil baffle 2 have through holes, and the two ends of the rotating shaft 3 pass through the two through holes respectively to be rotatably connected to the rotating seat 111. When oil smoke flows through the air outlet channel, the oil smoke exerts an upward force on the oil baffle 2, and the oil baffle 2 rotates around the rotating shaft 3, so that the part of the air outlet channel blocked by the oil baffle 2 is opened, which can reduce the resistance of the oil baffle 2 to the airflow flowing through the air outlet channel.

[0035] In the air outlet connector of the utility model, please refer to Figure 4 and Figure 5, when cooking fumes flow out through the air outlet channel, the cooking fumes exert a force on the lower surface of the oil baffle 2, causing the trailing edge of the oil baffle 2 to flip upward and the leading edge to flip downward. It should be explained that the edge of the oil baffle 2 closer to the rotating shaft 3 is called the leading edge, and the edge farther from the rotating shaft 3 is called the trailing edge. The part of the oil baffle 2 from the trailing edge to the rotating shaft 3 is the rear part, and the other part is the front part. When the air flow passes through the air outlet channel, the air flow blows the oil baffle 2 upward. The windward area of the rear part of the oil baffle 2 is larger than that of the front part. Under the action of the air flow, the rear part is forced to flip. When the rear part flips, the trailing edge of the oil baffle 2 flips upward, and the corresponding leading edge of the oil baffle flips downward.

[0036] In the air outlet joint of the present utility model, please refer to Figure 5 , the length of the part of the oil baffle 2 located in front of its rotation center is less than the distance from the lower surface of the oil baffle 2 to the first support seat 11 / the second support seat 12. Specifically explained, the length of the part of the oil baffle 2 located in front of its rotation center can be understood as the distance from the rotating shaft 3 to the leading edge of the oil baffle 2. The length of the part of the oil baffle 2 located in front of its rotation center is less than the distance from the lower surface of the oil baffle 2 to the first support seat 11 / the second support seat 12 to ensure that during the rotation of the oil baffle 2, its leading edge will not touch the bottom surface of the first support seat 11 / the second support seat 12 and be blocked.

[0037] In the air outlet joint of the present utility model, please refer to Figure 3 and Figure 5 , a limiting block 112 is further provided on the side where the first support seat 11 and the second support seat 12 are close to each other. The limiting block 112 is used to limit the rotation angle of the oil baffle 2. Under the action of the air flow passing through the air outlet channel, the rotating shaft 3 of the oil baffle 2 rotates around the rotating seat 111. If the flipping angle of the oil baffle 2 is too large, when the exhaust device stops operating, the rear part of the oil baffle 2 may flip to the front side of the rotating shaft 3. In this way, the downward projection of the oil baffle 2 will fall in front of the air suction port 51, and the oil droplets dripping from the air outlet channel power assembly 4 and the connecting pipe 6 to the air outlet 51 cannot be blocked by the oil baffle 2, and the oil droplets will drip outside the exhaust device through the air suction port 51. A limiting block 112 is further provided on the side where the first support seat 11 and the second support seat 12 are close to each other. When the air flow causes the oil baffle 2 to rotate, the leading edge of the oil baffle 2 flips downward and is limited by the limiting block 112 when the leading edge contacts the limiting block 112. The oil baffle 2 cannot continue to flip, so when the exhaust device stops operating, the oil baffle 2 will reset under the action of gravity.

[0038] In the air outlet joint of the present utility model, after the front edge of the oil baffle 2 abuts against the limit block 112, the angle between the oil baffle 2 and the horizontal direction is 75° to 80°. When the air extraction device operates, the oil baffle 2 flips 75° to 80°, which can not only open the air outlet channel blocked by the oil baffle 2, but also ensure that the oil baffle 2 is easily reset when the air outlet device stops operating.

[0039] Please refer to Figure 1 and Figure 2 In the air outlet joint of the present utility model, a oil guiding part 23 extends backward from the rear side edge of the oil baffle 2. The width of the oil guiding part 23 gradually decreases in the left-right direction and is smaller than the width of the corresponding position of the air outlet channel. The rear edge of the oil guiding part 23 is turned up to form an oil blocking part 24. If the width of the oil baffle 2 in the front-rear direction is too large, it will block the entry of oil fume in the air collecting cavity into the air outlet channel, resulting in too large air resistance in the air outlet channel and affecting the effect of the air extraction device in sucking oil fume. Therefore, the width of the part of the oil baffle 2 blocking the air suction port 51 only needs to be adapted to the air suction port 51. However, after the oil droplets dripping onto the oil baffle 21 accumulate to a certain amount, they will drip downward from the edge of the oil baffle 2. To prevent the oil droplets from splashing out from the air suction port 41, the edge of the oil baffle 2 extends backward to form an oil guiding part 23. The oil guiding part 23 guides the oil droplets on the oil baffle 2 to one side of the air suction port 51, and makes the width of the oil guiding part 23 in the left-right direction smaller than the width of the corresponding position of the air outlet channel, so as to reduce the air resistance formed by the oil guiding part 23 in the air outlet channel while guiding the oil. The rear edge of the oil guiding part 23 is turned up to form an oil blocking part 24. When the oil droplets drip onto the oil guiding part 23, they flow away from both sides of the oil blocking part 24.

[0040] Please refer to Figure 1 and Figure 2, in the air outlet joint of the present utility model, at the outlet end of the air outlet passage of the joint body 1, a first annular wall 13 extends upward. On the upper surface of the joint body 1, a second annular wall 14 arranged around the first annular wall 13 and a third annular wall 15 arranged around the second annular wall 14 extend upward. A first oil guiding groove 16 is formed between the first annular wall 13 and the second annular wall 14, and a second oil guiding groove 17 is formed between the second annular wall 14 and the third annular wall 15. The second oil guiding groove 17 communicates with the first oil guiding groove 16, and the first oil guiding groove 16 communicates with the wall surface of the air outlet passage. When both ends of the oil blocking piece 2 are respectively supported by the first support seat 11 and the second support seat 12, the part of the oil guiding portion 23 close to the oil blocking portion 24 and the oil blocking portion 24 are supported on the first annular wall 13. When the air outlet joint of the present utility model is applied to an exhaust device, the connecting pipe 6 is connected between the second annular wall 14 and the third annular wall 15. The oil liquid generated in the connecting pipe 6 when the oil fume passes through the connecting pipe 6 can flow along the inner wall of the connecting pipe 6 and drip into the second oil guiding groove 17. The second oil guiding groove 17 communicates with the first oil guiding groove 16, and the oil liquid in the second oil guiding groove 16 enters the first oil guiding groove 16, and then is guided by the first oil guiding groove 16 to the wall surface of the air outlet passage, and is discharged downward along the wall surface of the air outlet passage into the air collecting cavity of the air collecting assembly 5; after the oil liquid in the power assembly 4 and the connecting pipe 6 is received by the oil blocking piece 2, it is guided by the oil guiding portion 23 and flows out along both sides of the oil blocking portion 24. The oil blocking portion 24 is supported on the first annular wall 13, and the oil liquid flowing out of the oil blocking wall 24 can be introduced into the first oil guiding groove 16, and then is guided by the first oil guiding groove 16 to the wall surface of the air outlet passage.

[0041] In the air outlet joint of the present utility model, the second oil guiding groove 17 communicates with the first oil guiding groove 16, so the waste oil collected by the second oil guiding groove 17 can flow into the first oil guiding groove 16. The first oil guiding groove 16 communicates with the wall surface of the air outlet passage, so the waste oil collected by the first oil guiding groove 16 can flow out from the wall surface of the air outlet passage. The part of the oil guiding portion 23 close to the oil blocking portion 24 and the oil blocking portion 24 are supported on the first annular wall 13, so the waste oil collected by the oil blocking piece 2 can flow into the first oil guiding groove 16 and then be discharged.

[0042] In the air outlet joint of the present utility model, please refer to Figure 1 and Figure 2, the first oil guide groove 16 has an oil outlet, and guide grooves 18 extend downward along the inner wall of the air outlet channel on both sides of the oil outlet; after the oil in the second oil guide groove 17 enters the first oil guide groove 16, it flows along the first oil guide groove 16 and converges at the oil outlet of the first oil guide groove 16, and flows into the guide groove 18 through the oil outlet of the first oil guide groove 16. The guide groove 18 can guide the oil to one side of the air collecting chamber. In practical applications, an oil guide hole is provided on the bottom plate of the air collecting component 5. After the guide groove 18 guides the oil to the bottom plate of the air collecting component 5, the oil guide hole discharges the oil. In practical applications, the projection of the guide groove 18 to the bottom of the air collecting chamber is located at the rear side of the air suction port 51, and the oil guide hole is located at the rear side of the air suction port 51. The guide groove 18 guides the oil to the rear side of the air outlet 51, and then the oil guide hole discharges the oil.

[0043] In the air outlet joint of the utility model, the wall surface between the outlet of the air outlet channel and the outlet of the first oil guide groove 16 forms an oil guide surface, and the downward projection of the oil guide surface is located at the rear side of the air suction port 51 of the air extraction device. The guide groove 18 is located on both sides of the outlet of the first oil guide groove 16. In actual application, the projection of the guide groove 18 to the bottom of the air collecting cavity is located at the rear side of the air suction port 51, so the downward projection of the oil guide surface is located at the rear side of the air suction port, so that when the oil flows down along the wall surface of the air outlet channel, it will all flow to the rear side of the air outlet.

[0044] See also Figure 6 and Figure 7 The utility model also proposes an exhaust device, which adopts the above-mentioned air outlet joint, including a power component 4, an air collection component 5 and a connecting pipe 6. The air collection component 5 is provided with an air suction port 51 and an air outlet. The joint body 1 is connected to the air outlet. The downward projection of the oil baffle 2 covers the air suction port 51. The power component 4 has an air inlet and an air outlet. The air inlet end of the connecting pipe 6 is connected to the joint body 1, and the air outlet end of the connecting pipe 6 is connected to the air inlet of the power component 4. In the exhaust device of the utility model, an oil baffle 2 is provided in the air outlet joint. The oil baffle 2 is designed to be rotatable in the air outlet channel. The oil baffle 2 can not only block the oil droplets dripping to the air suction port 51 when the exhaust device stops running, but also when the exhaust device is running, when there is airflow blowing from bottom to top in the air outlet channel, the oil baffle 2 flips upward to reduce the windshield area, and minimize the resistance of the oil baffle 2 to the airflow when it flows through the air outlet channel, so as to ensure the exhaust efficiency of the exhaust device.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air outlet joint for an air extraction device, characterized in that, include: A joint body (1) has an air outlet channel inside, the inner wall surface of the air outlet channel is provided with a first support seat (11) and a second support seat (12), and the first support seat (11) and the second support seat (12) are both provided with a rotating seat (111); An oil baffle (2) is rotatably connected to the rotating seat (111), and its two ends are respectively supported by the first supporting seat (11) and the second supporting seat (12); When no oil smoke enters the air outlet channel, the two ends of the oil baffle (2) are respectively supported by the first support seat (11) and the second support seat (12), and the downward projection of the oil baffle (2) covers the air intake port of the exhaust device; when oil smoke flows out through the air outlet channel, the oil smoke exerts a force on the oil baffle (2) from the lower surface of the oil baffle (2), and the oil baffle (2) rotates around the rotating seat (111) and flips upward.

2. The air outlet joint according to claim 1, wherein, The two ends of the oil baffle plate (2) are provided with avoidance portions (21), the edges of the avoidance portions (21) are provided with support members (22) extending upward, a rotating shaft (3) is extended from the mutually opposite sides of the support members (22), and the rotating shaft (3) is rotatably connected in the rotating seat (111).

3. The air outlet joint according to claim 1, wherein When oil smoke flows out through the air outlet channel, the oil smoke exerts a force on the oil baffle (2) from the lower surface of the oil baffle (2), causing the rear edge of the oil baffle (2) to flip upwards and the front edge to flip downwards.

4. The air outlet joint according to claim 3, wherein, The length of the portion of the oil baffle (2) located in front of its rotation center is smaller than the distance from the lower surface of the oil baffle (2) to the first support seat (11) / the second support seat (12).

5. The air outlet joint according to claim 3, characterized in that A limit block (112) is also provided on the side where the first support seat (11) and the second support seat (12) are close to each other, and the limit block (112) is used to limit the rotation angle of the oil baffle (2).

6. The air outlet joint according to claim 5, characterized in that, After the front edge of the oil deflector (2) abuts against the limit block (112), the angle between the oil deflector (2) and the horizontal direction is 75° to 80°.

7. The air outlet joint according to claim 1, characterized in that, An oil guide portion (23) is extended backward from the rear edge of the oil baffle plate (2), the width of the oil guide portion (23) in the left-right direction gradually decreases and is smaller than the width of the corresponding position of the air outlet channel, and an oil baffle portion (24) is folded upward at the rear edge of the oil guide portion (23).

8. The air outlet joint according to claim 7, characterized in that, The outlet end of the air outlet channel of the joint body (1) extends upward with a first annular wall (13). The upper surface of the joint body (1) extends upward with a second annular wall (14) arranged around the first annular wall (13) and a third annular wall (15) arranged around the second annular wall (14). A first oil guide groove (16) is formed between the first annular wall (13) and the second annular wall (14), and a second oil guide groove (17) is formed between the second annular wall (14) and the third annular wall (15). The second oil guide groove (17) communicates with the first oil guide groove (16), and the first oil guide groove (16) communicates with the wall surface of the air outlet channel. When both ends of the oil baffle (2) are supported by the first support seat (11) and the second support seat (12) respectively, the part of the oil guide portion (23) close to the oil blocking portion (24) and the oil blocking portion (24) are supported on the first annular wall (13).

9. The air outlet joint according to claim 8, characterized in that, The first oil guide groove (16) has an oil outlet. On both sides of the oil outlet, diversion grooves (18) extend downward along the inner side wall surface of the air outlet channel; the wall surface of the air outlet channel between the outlets of the first oil guide groove (16) forms an oil guide surface, and the downward projection of the oil guide surface is located behind the air suction port of the air extraction device.

10. An air extraction device, adopting the air outlet joint described in any one of claims 1 to 9, characterized in that, It includes a power assembly (4), an air collection assembly (5) and a connecting pipe (6). The air collection assembly (5) is provided with an air suction port (51) and an air outlet. The joint body (1) is connected to the air outlet. The downward projection of the oil baffle (2) covers the air suction port (51). The power assembly (4) has an air inlet and an air outlet. The air inlet end of the connecting pipe (6) is connected to the joint body (1), and the air outlet end of the connecting pipe (6) is connected to the air inlet of the power assembly (4).

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