Air exhaust filtering assembly and air curtain type rainproof air exhaust filtering window

Abstract

This utility model provides an exhaust filter assembly and an air curtain-type rainproof exhaust filter window. The assembly includes: multiple sets of "JY"-shaped blades distributed perpendicular to the exhaust airflow direction; each "JY"-shaped blade assembly includes Y-shaped louvers and J-shaped louvers distributed along the exhaust airflow direction; the Y-shaped louvers are inverted Y-shaped, forming an air inlet channel between two adjacent Y-shaped louvers perpendicular to the exhaust airflow direction; the J-shaped louvers are J-shaped and positioned at the air outlet of the air inlet channel formed between the two Y-shaped louvers; an air outlet channel is formed between two adjacent J-shaped louvers perpendicular to the exhaust airflow direction, with the air outlet of the air outlet channel lower than the air outlet of the air inlet channel, guiding the airflow on the exhaust surface to form an air curtain in the same direction as raindrops. The airflow enters through the air inlet channel, accelerates through the narrow opening between the Y-shaped louvers, and impacts the J-shaped louvers at the air inlet channel outlet, intercepting and guiding water droplets out.

Description

Technical Field

[0001] This utility model belongs to the field of cabinet heat dissipation technology, specifically relating to an exhaust filter component and an air curtain-type rainproof exhaust filter window. Background Technology

[0002] Existing ventilation windows do not have a rainproof design and usually need to be paired with rainproof ventilation components. The connection part of the rainproof ventilation louvers is generally sealed and fixed to the ventilation window with threaded fasteners to prevent rainwater from directly entering the cabin.

[0003] However, since the equipment is located outdoors or at high altitudes, wind direction is unpredictable and wind speed varies greatly. When it rains heavily or when rain is accompanied by strong winds, rainwater can still enter through the exhaust vents and splash or drift onto the live parts in the cabin or remain on the surface of metal parts, causing corrosion. This can increase leakage of cabin parts or corrode metal parts and solder joints, leading to equipment shutdown, damage, and increased energy consumption. At the same time, poor ventilation can also reduce heat dissipation, which can harm the electronic equipment inside the cabin. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an exhaust filter assembly and an air curtain-type rainproof exhaust filter window, which can ensure heat dissipation while preventing rain leakage.

[0005] To achieve the above objectives / to solve the above technical problems, this utility model adopts the following technical solution:

[0006] In a first aspect, this utility model provides an exhaust air filtration assembly, comprising:

[0007] Multiple sets of "JY"-shaped blades are distributed along the direction perpendicular to the exhaust airflow.

[0008] The “JY” type blade assembly includes Y-shaped louvers and J-shaped louvers distributed along the exhaust airflow direction;

[0009] The Y-shaped louvers are inverted Y-shaped, and an air inlet channel is formed between two adjacent Y-shaped louvers that are perpendicular to the direction of the exhaust airflow.

[0010] The J-shaped louvers are J-shaped and are positioned at the air outlet of the air inlet channel formed between two Y-shaped louvers. An air outlet channel is formed between two adjacent J-shaped louvers perpendicular to the direction of the exhaust airflow. The air outlet of the air outlet channel is lower than the air outlet of the air inlet channel, guiding the airflow on the exhaust surface to form an air curtain in the same direction as the raindrops.

[0011] The above setup achieves the following effect: the airflow enters through the air inlet channel, is accelerated through the narrow opening between the Y-shaped louvers, and strikes the J-shaped louvers at the air inlet channel outlet. It forms a downward air curtain in the combined flow channel and flows out of the air outlet of the air outlet channel, which is the rain-facing surface of the exhaust filter component, to intercept and guide water droplets out.

[0012] Furthermore, the Y-shaped louver includes a main blade arranged perpendicular to the exhaust airflow direction and two branch blades that are inclined relative to the main blade and connected to the lower end of the main blade.

[0013] The branch blades include a branch blade one that is far from the J-shaped louver and a branch blade two that is close to the J-shaped louver.

[0014] The above setup achieves the following effects: through the combination of the main blade and two branch blades, the first branch blade enables the exhaust airflow to make its first turn into the air inlet channel, thus accelerating the airflow; the main blade acts as a high wall to guide the accelerated airflow and prevent small external water droplets from entering the equipment side; the second branch blade can guide the airflow and direct the incoming small water droplets downwards.

[0015] Furthermore, the branch blade extends downwards with a baffle plate.

[0016] The above setup achieves the following effects: the baffle plate can reduce the inlet area of ​​the air inlet surface, compress the flow channel to accelerate the airflow, and form an air curtain in the combined flow channel to intercept and guide water droplets out.

[0017] Furthermore, the bottom of the exhaust filter assembly is provided with a drain outlet on the side near the J-shaped louvers.

[0018] The above setup achieves the following effect: all the raindrops that are intercepted and discharged are blown away from the exhaust surface by the high-speed airflow, and the remaining smaller raindrops gather on the exhaust surface, forming larger water droplets. Under the action of gravity, they enter the exhaust outlet of the next louver and are sucked away from the exhaust surface; the last louver has a drain outlet at the bottom, through which the water droplets are discharged.

[0019] Furthermore, the angle between the main blade and the branch blade located on the air inlet surface is 135°~145°;

[0020] The angle between the main blade and the branch blade II located on the air outlet surface is 130°~140°.

[0021] Furthermore, the length of the first baffle is 15~20mm.

[0022] The above settings achieve the following effects: To achieve a better air curtain effect, the air inlet angle of the Y-shaped louvers is 135°~145°, and the air inlet guide length is 15~20mm; the angle of the Y-shaped louvers at the three narrow openings is 130°~140°.

[0023] Furthermore, the J-shaped louver includes a second guide vane arranged perpendicular to the exhaust airflow direction, a first guide vane connected to the upper end of the second guide vane, and a third guide vane connected to the lower end of the second guide vane.

[0024] Both the first and third guide vanes are inclined inwards towards the component.

[0025] The above setup achieves the following effect: rainwater is largely blocked when passing through the J-shaped louvers on the air outlet surface; and together with the air curtain flowing out from the second branch blade on the air inlet surface, it forms a low-pressure, low-speed airflow region, which facilitates the collection of water droplets entering this region, which are then discharged to the external surface by inertia. This effectively blocks and filters out any remaining water droplets in the airflow. Simultaneously, the high-speed air curtain of the second branch blade on the air inlet surface alters the airflow direction, preventing the water-laden airflow from directly spraying onto the air inlet surface and preventing excessively humid airflow from flowing back into the equipment compartment.

[0026] Furthermore, the length of the first guide vane is 18~22mm;

[0027] The included angle between the first guide vane and the second guide vane is 130°~140°;

[0028] The length of the second guide vane is 15~18mm;

[0029] The length of the third guide vane is 4~5mm;

[0030] The angle between the second and third guide vanes is 130°~145°.

[0031] The above settings achieve the following effects: To complement the narrow opening of the Y-shaped louver, a better low-pressure, low-speed zone and flow channel are formed. The upper blade of the J-shaped louver has a flow-guiding length of 18~22mm and a flow-guiding angle of 130°~140°. The vertical baffle on the exhaust surface has a length of 15~18mm, and the baffle at the confluence point has a length of 4~5mm and an angle of 130°~145°.

[0032] Secondly, this utility model provides a wind curtain-type rainproof exhaust filter window, including an installation frame and a combination louver rotatably connected to the installation frame.

[0033] The combined louvers include the exhaust filter assembly as described in the first aspect.

[0034] The above setup achieves the following effect: This design uses bolt holes on the flange side of the main frame and fasteners such as bolts and nuts to lock and install the equipment cabinet, energy storage cabinet, charging column cabinet and high-altitude wind turbine nacelle shell of this product.

[0035] Furthermore, the end of the combined louver is rotatably connected to the mounting frame via a spring pivot pin, and the other end of the combined louver is provided with a steering knuckle lock for locking the combined louver and the mounting frame together.

[0036] The above setup achieves the following effects: the mounting frame and the combined louvers are connected by spring-loaded pivot pins, facilitating opening and closing during use and maintenance; the combined louvers are locked with a pivot lock after closing to prevent accidental opening of the components.

[0037] Furthermore, the combined louver also includes a louver frame and mounting plates disposed on both sides of the louver frame.

[0038] The mounting plate is used for fixed connection to the side end of the exhaust filter assembly.

[0039] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0040] 1. This utility model can effectively prevent rainwater and rainwater splashes from penetrating the interior of the louvers, causing water droplets to enter the air inlet surface of the louvers;

[0041] 2. This utility model can effectively change the direction of the exhaust airflow, increasing the water droplet collection and discharge capacity of the exhaust surface. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the rainproof exhaust filter window of this utility model;

[0043] Figure 2 This is a schematic diagram of the "JY" type blade assembly of this utility model;

[0044] Figure 3 This is a schematic diagram of the wind speed flow channel of the "JY" type blade assembly of this utility model;

[0045] Figure 4 This is a three-dimensional structural diagram of the exhaust filter assembly of this utility model;

[0046] Figure 5 This is an airflow organization diagram of the exhaust filter assembly of this utility model;

[0047] Figure 6 This is a schematic diagram of the specific structure of the Y-shaped louver of this utility model;

[0048] Figure 7 This is a schematic diagram of the specific structure of the J-shaped louver of this utility model;

[0049] Figure 8 This is a cross-sectional view of the rainproof exhaust filter window of this utility model in its closed state;

[0050] Figure 9 This is a cross-sectional view of the rainproof exhaust filter window of this utility model in the open state;

[0051] Figure 10 This is a schematic diagram of the installation of the rainproof exhaust filter window of this utility model.

[0052] In the diagram: 1. Mounting frame; 2. Combined louvers; 21. Louver frame; 22. Mounting plate; 23. J-shaped louver blades; 231. Deflector blade one; 232. Deflector blade two; 233. Deflector blade three; 24. Y-shaped louver blades; 241. Main blade; 242. Branch blade one; 243. Branch blade two; 244. Baffle plate one; 25. Steering knuckle lock; 26. Spring pin; 27. Racetrack-shaped connecting hole; 28. Drain outlet.

[0053] 01. Air curtain; 02. Low-pressure, low-speed zone; 03. Narrow opening one; 04. Narrow opening two; 05. Narrow opening three. Detailed Implementation

[0054] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0055] In the description of this embodiment, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this embodiment.

[0056] Compared with existing rainproof louvers, this design mainly considers three design points:

[0057] 1. Modify the flow channel to achieve physical inertial interception and guidance;

[0058] 2. The compressed flow channel accelerates the airflow and forms an air curtain in the combined flow channel to intercept and guide water droplets out.

[0059] 3. Change the direction of the outlet airflow to move the intercepted water droplets further away from the exhaust surface. Example 1

[0060] like Figure 2As shown, this embodiment provides an exhaust air filtration assembly, including:

[0061] Multiple sets of "JY"-shaped blades are distributed along the direction perpendicular to the exhaust airflow.

[0062] The “JY” type blade assembly includes Y-shaped louvers 24 and J-shaped louvers 23 distributed along the exhaust airflow direction;

[0063] The Y-shaped louver 24 is inverted Y-shaped, and an air inlet channel is formed between two adjacent Y-shaped louvers 24 perpendicular to the exhaust airflow direction;

[0064] The J-shaped louver 23 is J-shaped and is located at the air outlet of the air inlet channel formed between two Y-shaped louvers 24; an air outlet channel is formed between two adjacent J-shaped louvers 23 perpendicular to the direction of exhaust airflow, and the air outlet of the air outlet channel is lower than the air outlet of the air inlet channel, guiding the airflow on the air outlet surface to form an air curtain in the same direction as the raindrops.

[0065] Implementation principle: The airflow enters through the air inlet channel, is accelerated through the narrow opening between the Y-shaped louvers 24, and hits the J-shaped louvers 23 at the air inlet channel outlet. It forms a downward air curtain in the combined flow channel and flows out of the air outlet of the air outlet channel, which is the rain-facing surface of the exhaust filter component, to intercept and guide water droplets out. Example 2

[0066] Based on design principles similar to those in Example 1, such as Figure 2 As shown, this embodiment provides an exhaust filter assembly. The main structure of the assembly adopts a "JY" type blade combination structure. The airflow needs to go through three turns from the air inlet to the air outlet of the exhaust device. The "JY" type blade combination adds a baffle (baffle 244) on the air inlet, which is similar to the compressed air flow channel. When the continuous exhaust wind speed is constant, the narrowing of the airflow channel will accelerate the airflow speed. After the secondary acceleration and guidance of the Y-shaped louver combination channel, a high-speed air curtain is formed, which guides the airflow on the air outlet to the same direction as the raindrops. This can more effectively block the entry of external air carrying water droplets and discharge the water droplets carried in the external airflow through inertia. When the rainwater passes through the J-shaped louver 23 on the air outlet, it will be largely blocked. It forms a low-pressure and low-speed airflow area with the air curtain flowing out of the branch blade 243 on the air inlet, which is conducive to the collection of water droplets entering this area and finally flowing to the external surface for discharge through inertia. This effectively blocks and filters out water droplets that are not removed from the airflow. At the same time, the high-speed air curtain of the second branch blade 243 on the air inlet surface changes the direction of the airflow, allowing the airflow carrying water droplets to avoid being directly sprayed onto the air inlet surface, and preventing the excessively humid airflow from flowing back into the equipment compartment.

[0067] like Figure 2 As shown, the components and their connections are as follows:

[0068] Baffle 244 is set on the air inlet surface of the upper Y-shaped louver in the channel; the main blade 241 is the second baffle, set on the next Y-shaped louver 24 in the channel; the Y-shaped louver 24 is used to form an airflow channel with the J-shaped louver 23.

[0069] like Figure 3 and Figure 5 As shown, the working principle is as follows:

[0070] 1. By using a compression channel to accelerate the flow rate and by using a tortuous channel to build an air curtain at the air outlet, the entry of water droplets and air carrying small water droplets at the air outlet can be blocked.

[0071] 2. By utilizing the high-speed airflow of the air curtain, the low-pressure, low-speed zone formed in the Y-shaped and J-shaped louvers on the air outlet surface imparts inertial force to small-mass raindrops, causing water droplets and small water droplets carried by the air on the air outlet surface to collect. The inertial force and the air curtain are used to remove the small-mass raindrops through the tortuous channel of the J-shaped louvers.

[0072] Specifically, such as Figure 2 and Figure 6 As shown, the Y-shaped louver 24 includes a main blade 241 arranged perpendicular to the exhaust airflow direction and two branch blades inclinedly connected to the lower end of the main blade 241 relative to the main blade 241; the branch blades include a first branch blade 242 away from the J-shaped louver 23 and a second branch blade 243 close to the J-shaped louver 23. Through the combination of the main blade 241 and the two branch blades, the first branch blade 242 achieves the first bend of the exhaust airflow into the air inlet channel, thereby accelerating the airflow; the main blade 241 can act as a high wall to guide the accelerated airflow and prevent small external water droplets from entering the equipment side, while the second branch blade 243 can guide the airflow and direct the incoming small water droplets downwards.

[0073] Furthermore, the branch blade 242 extends downwards with a baffle 244, forming narrow openings 03, 04, and 05 on the air inlet surface. The baffle 244 reduces the inlet area of ​​the air inlet surface, compresses the flow channel to accelerate the airflow, and forms an air curtain 01 in the combined flow channel to intercept and guide water droplets out.

[0074] Specifically, such as Figure 4 As shown, the bottom of the exhaust filter assembly has a drain outlet 28 near the J-shaped louver 23. All the raindrops that are intercepted and discharged are blown away from the exhaust surface by the high-speed airflow. The remaining smaller raindrops gather on the exhaust surface, forming larger water droplets. Under the action of gravity, they enter the exhaust outlet of the next louver and are sucked away from the exhaust surface. The last louver has a drain outlet at the bottom, through which the water droplets are discharged.

[0075] like Figure 6As shown, the angle between the main blade 241 and the first branch blade 242 is 135°~145°; the angle between the main blade 241 and the second branch blade 243 is 130°~140°; and the length of the first baffle 244 is 15~20mm. In other words, to achieve a better air curtain effect, the air inlet angle of the Y-shaped louvers is 135°~145°, and the air inlet guide length is 15~20mm; the angle of the Y-shaped louvers at the three narrow openings is 130°~140°.

[0076] Specifically, such as Figure 7 As shown, the J-shaped louver 23 includes a second guide vane 232 arranged perpendicular to the exhaust airflow direction, a first guide vane 231 connected to the upper end of the second guide vane 232, and a third guide vane 233 connected to the lower end of the guide vane 232; both the first guide vane 231 and the third guide vane 233 are inclined inwards towards the component. When rainwater passes through the J-shaped louver 23 on the air outlet surface, it will be largely blocked; and together with the air curtain flowing out from the second branch vane 243 on the air inlet surface, it forms a low-pressure, low-speed airflow area, which is conducive to the collection of water droplets entering this area, and the water droplets will eventually flow to the external surface and be discharged through inertia. This effectively blocks and filters out water droplets that are not removed from the airflow. At the same time, the high-speed air curtain of the second branch vane 243 on the air inlet surface changes the direction of the airflow, allowing the airflow carrying water droplets to avoid being directly sprayed onto the air inlet surface, and preventing excessively humid airflow from flowing back into the equipment compartment.

[0077] Specifically, such as Figure 7 As shown, the length of guide vane 1 231 is 18~22mm; the angle between guide vane 1 231 and guide vane 232 is 130°~140°; the length of guide vane 232 is 15~18mm; the length of guide vane 3 233 is 4~5mm; and the angle between guide vane 232 and guide vane 3 233 is 130°~145°. In other words, to facilitate the formation of a better low-pressure, low-velocity zone and flow channel at the narrow opening of the Y-shaped louver 24, the upper long strip of the J-shaped louver 23 has a flow-guiding length of 18~22mm and a flow-guiding angle of 130°~140°. The vertical baffle on the exhaust surface has a length of 15~18mm, and the baffle at the confluence point has a length of 4~5mm and an angle of 130°~145°.

[0078] like Figure 3 As shown, the working process is as follows:

[0079] The airflow enters from the direction of the black arrow, accelerates through narrow opening 1 (03), narrow opening 2 (04), and narrow opening 3 (05), and forms an air curtain 01 at the outlet surface from narrow opening 3 (05). Simultaneously, a low-pressure, low-velocity zone 02 is formed in the flow channel space between narrow opening 3 (05) and the J-shaped louver 23. Large raindrops are first intercepted by the guide vane 232 on the exhaust surface; some raindrops may rush in and be intercepted by the inclined guide vane 1 (231), and are discharged under the action of the air curtain and the inertia of the water droplets; some air containing small water droplets, as well as small water droplets mixed with air due to rain splashing, are carried by the air curtain into the flow channel space between narrow opening 3 (05) and the J-shaped louver 23, forming a low-pressure, low-velocity zone 02. This allows the small raindrops to collect and form larger water droplets, which are then discharged through the guide vane 1 on the exhaust surface under the action of inertia and the air curtain 01.

[0080] Subsequently, all the intercepted and discharged raindrops are blown away from the exhaust surface by the high-speed airflow. The remaining smaller raindrops gather on the exhaust surface, forming larger water droplets. Under the action of gravity, they enter the exhaust outlet of the next louver assembly and are sucked away from the exhaust surface. The last louver assembly has a drain outlet 28 at the bottom, which is connected to the outside through a racetrack-shaped connecting hole 27. The water droplets in this part are discharged to the outside through the drain outlet 28.

[0081] from Figure 5 The corresponding effect can be seen in the airflow organization diagram.

[0082] The part circled in red indicates that the airflow exiting the final narrow opening is an accelerated air curtain 01, sprayed downwards at an angle;

[0083] The second red circle marks the low-pressure, low-velocity zone 02 formed in the Y-shaped and J-shaped louvered channels at the top of the air curtain. Example 3

[0084] like Figure 1 and Figure 10 As shown, this embodiment provides an air curtain type rainproof exhaust filter window, including a mounting frame 1 and a combination louver 2 rotatably connected to the mounting frame 1;

[0085] The combined louver 2 includes the exhaust filter assembly as described in Example 2. In this design, the equipment cabinet, energy storage cabinet, charging column cabinet, and high-altitude wind turbine nacelle housing are secured and installed using bolts and nuts and other fasteners through the threaded holes on the flange edge of the main frame.

[0086] Specifically, such as Figure 8 and Figure 9As shown, one end of the combined louver 2 is rotatably connected to the mounting frame 1 via a spring pivot pin 26, and the other end of the combined louver 2 is provided with a steering knuckle lock 25 for locking the combined louver 2 and the mounting frame 1 together. The mounting frame 1 and the combined louver 2 are connected by a spring pivot pin 26, which facilitates opening and closing during use and maintenance; the combined louver 2 is locked with the steering knuckle lock 25 after being closed to prevent the components from being accidentally opened.

[0087] The combined louver 2 also includes a louver frame 21 and mounting plates 22 disposed on both sides of the louver frame 21; the mounting plates 22 are used for fixed connection with the side ends of the exhaust filter assembly. The mounting plates 22 are preferably plastic mounting plates 22.

[0088] Compared with existing wind curtain-type rainproof exhaust filter windows, the advantages of this utility model are:

[0089] 1. Effectively prevents rainwater and rain splashes from penetrating the interior of the louvers, thus preventing water droplets from entering the air inlet surface of the louvers;

[0090] 2. It can effectively change the direction of the exhaust airflow, increasing the water droplet collection and discharge capacity of the exhaust surface.

[0091] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0092] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0093] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0094] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0095] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. An exhaust air filtration assembly, characterized by, include: Multiple groups A "JY" type blade assembly distributed along a direction perpendicular to the exhaust airflow; The "JY" type blade assembly includes Y-shaped louvers and J-shaped louvers distributed along the exhaust airflow direction; The Y-shaped louvers are inverted Y-shaped, and an air inlet channel is formed between two adjacent Y-shaped louvers that are perpendicular to the direction of the exhaust airflow. The J-shaped louvers are J-shaped and are positioned at the air outlet of the air inlet channel formed between two Y-shaped louvers. An air outlet channel is formed between two adjacent J-shaped louvers perpendicular to the direction of the exhaust airflow. The air outlet of the air outlet channel is lower than the air outlet of the air inlet channel, guiding the airflow on the exhaust surface to form an air curtain in the same direction as the raindrops.

2. The exhaust air filtration assembly of claim 1, wherein, The Y-shaped louver includes a main blade arranged perpendicular to the exhaust airflow direction and two branch blades that are inclined relative to the main blade and connected to the lower end of the main blade. The branch blades include a branch blade one that is far from the J-shaped louver and a branch blade two that is close to the J-shaped louver.

3. The exhaust air filtration assembly of claim 2, wherein, The branch blade extends downwards with a baffle plate.

4. The exhaust air filtration assembly of claim 1, wherein, The bottom of the exhaust filter assembly has a drain outlet on the side near the J-shaped louvers.

5. The exhaust air filtration assembly of claim 3, wherein, The angle between the main blade and the first branch blade is 135°~145°; The angle between the main blade and the second branch blade is 130°~140°; The length of the first baffle is 15~20mm.

6. The exhaust air filtration assembly of claim 3, wherein, The J-shaped louver includes a second guide vane arranged perpendicular to the exhaust airflow direction, a first guide vane connected to the upper end of the second guide vane, and a third guide vane connected to the lower end of the second guide vane. Both the first and third guide vanes are inclined inwards towards the component.

7. The exhaust air filtration assembly of claim 6, wherein, The length of the first guide vane is 18~22mm; The included angle between the first guide vane and the second guide vane is 130°~140°; The length of the second guide vane is 15~18mm; The length of the third guide vane is 4~5mm; The angle between the second and third guide vanes is 130°~145°.

8. A rain-escape type exhaust air filtering window of the air curtain type, characterized in that, Includes a mounting frame and a combined louver rotatably connected to the mounting frame; The combined louvers include the exhaust filter assembly as described in any one of claims 1-7.

9. The rain-escape type exhaust air filter window according to claim 8, wherein The end of the combined louver is rotatably connected to the mounting frame via a spring pivot pin, and the other end of the combined louver is provided with a steering knuckle lock for locking the combined louver and the mounting frame together.

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