Filter screen, filter and electrical equipment

Abstract

The utility model discloses a filter screen, a filter and electrical equipment, and relates to the technical field of rail transit electrical equipment.The filter screen comprises a filter screen body, a first clamping plate and a second clamping plate; the first clamping plate is arranged on the air inlet side of the filter screen body; the second clamping plate is arranged on the air outlet side of the filter screen body, and the filter screen body is clamped by the first clamping plate and the second clamping plate; a dirt collecting structure is arranged at the bottom of the first clamping plate or the second clamping plate, faces the air outlet side of the filter screen body and is configured to collect foreign matters filtered by the filter. According to the technical scheme provided by the utility model, the filter screen compatible with the foreign matter collecting function is provided, so that the structural design is simplified.

Description

TECHNICAL FIELD

[0001] The utility model relates to rail transit electrical equipment technical field, especially a filter screen, filter and electrical equipment. BACKGROUND

[0002] In the high-voltage electrical equipment of rail transit vehicle, forced air cooling is an effective heat dissipation means, and air filtering design needs to be considered at the air inlet and air outlet to avoid dust and other large particles and foreign matters such as willow catkins and hair from entering the equipment interior, so that the air duct is blocked and heat dissipation is affected.

[0003] In the related art, large-particle foreign matters filtered by the air filter can be settled, and a separate dirt collection structure needs to be additionally provided to collect the foreign matters, so that the structure is complex. UTILITY MODEL CONTENT

[0004] The utility model discloses a filter screen, filter and electrical equipment, and aims to provide a filter screen compatible with foreign matter collection function to simplify the structural design.

[0005] To achieve the above object, the utility model provides a filter screen, which comprises:

[0006] A filter screen body;

[0007] A first clamping plate is arranged at the air inlet side of the filter screen body;

[0008] A second clamping plate is arranged at the air outlet side of the filter screen body, and the first clamping plate and the second clamping plate clamp the filter screen body; the bottom of the first clamping plate or the second clamping plate is provided with a dirt collection structure, the dirt collection structure is arranged towards the air outlet side of the filter screen body, and the dirt collection structure is configured to collect foreign matters filtered by the filter.

[0009] In an embodiment, the dirt collection structure is arranged at the bottom of the first clamping plate, and the filter screen body and the second clamping plate are both located above the dirt collection structure.

[0010] In an embodiment, the dirt collection structure comprises:

[0011] An extension plate, one side edge of the extension plate is connected to the bottom of the first clamping plate, and the other side edge of the extension plate extends away from the first clamping plate;

[0012] A first bent plate, one side edge of the first bent plate is connected to the side edge of the extension plate away from the first clamping plate, and the other side edge of the first bent plate extends towards the air outlet side of the filter screen body;

[0013] The second bent plate has one side connected to the side of the first bent plate away from the extension plate, and the second bent plate is disposed opposite to the extension plate; the extension plate, the first bent plate and the second bent plate together form a sludge collection trough.

[0014] In one embodiment, the first bent plate is provided with a cleaning hole that communicates with the sludge collection tank.

[0015] In one embodiment, the filter screen further includes a first connector, which passes through the first clamping plate and the second clamping plate to lock the first clamping plate and the second clamping plate.

[0016] In one embodiment, the first clamping plate and / or the second clamping plate are aluminum plates or aluminum alloy plates.

[0017] In one embodiment, the first clamping plate has a folded edge on one side near the second clamping plate, and the filter body is accommodated within the limiting space formed by the folded edge.

[0018] To achieve the above objectives, this utility model also proposes a filter, comprising:

[0019] frame;

[0020] FSA filter element, wherein the FSA filter element is disposed in the frame;

[0021] The aforementioned filter screen is located on the air inlet side of the FSA filter element, and the dirt collection structure of the filter screen is configured to collect foreign objects filtered by the FSA filter element.

[0022] In one embodiment, the frame is provided with a guide plate and a drain port communicating with the FSA filter element. The guide plate is located below the drain port and is configured to guide foreign matter flowing out of the drain port to the dirt collection structure.

[0023] In one embodiment, one side of the guide plate is connected to the frame, and the other side of the guide plate is inclined toward the dirt collection structure.

[0024] In one embodiment, the sludge collection structure includes:

[0025] An extension plate, one side of which is connected to the bottom of the first clamping plate, and the other side of which extends away from the first clamping plate;

[0026] The first bending plate has one side connected to the side of the extension plate away from the first clamping plate, and the other side of the first bending plate extends toward the air outlet side of the filter body.

[0027] The second bent plate has one side connected to the side of the first bent plate away from the extension plate, and the second bent plate is disposed opposite to the extension plate; the extension plate, the first bent plate and the second bent plate together form a sludge collection trough;

[0028] The guide plate is supported on the side of the second bent plate away from the first bent plate.

[0029] In one embodiment, the bottom of the frame is provided with a mounting flange, which abuts against the second bending plate.

[0030] In one embodiment, the first bent plate is provided with a cleaning hole communicating with the sludge collection tank. The first bent plate is inclined downward in a direction away from the extension plate and close to the extension plate, and the cleaning hole is located close to the extension plate.

[0031] In one embodiment, the FSA filter element includes:

[0032] Bottom connecting plate, connected to the frame;

[0033] A top connecting plate is connected to the frame and located above the bottom connecting plate, with the top connecting plate and the bottom connecting plate being disposed opposite to each other;

[0034] A filter element tube is connected between the bottom connecting plate and the top connecting plate. The filter element tube has at least two rows, and the at least two rows of filter element tubes are distributed at intervals from the direction close to the filter screen to the direction away from the filter screen, and the adjacent two rows of filter element tubes are staggered.

[0035] In one embodiment, the bottom connecting plate has a baffle on the side away from the filter screen, the baffle being configured to block foreign objects settling from the filter tube.

[0036] In one embodiment, the periphery of the first clamping plate is provided with a first connecting plate, the periphery of the frame is provided with a second connecting plate, and the filter further includes a second connecting member, which passes through the first connecting plate and the second connecting plate.

[0037] To achieve the above objectives, this utility model also proposes an electrical device, characterized in that it comprises:

[0038] The equipment body is provided with an air duct, an air inlet and an air outlet connected to the air duct, and a fan is provided inside the air duct;

[0039] The aforementioned filter is located at the air inlet.

[0040] The technical solution of this utility model involves directly forming a dirt-collecting structure on the first or second clamping plate of the filter screen. When the filter screen is applied to a filter, the dirt-collecting structure on the screen collects large particles such as dust and water vapor filtered by the filter. This makes the filter screen compatible with the function of collecting foreign matter, eliminating the need for a separate dirt-collecting structure. Therefore, this solution provides a filter screen that is compatible with foreign matter collection, simplifying the structural design. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0042] Figure 1 An exploded view of an embodiment of the filter provided by this utility model;

[0043] Figure 2 A side view of an embodiment of the filter provided by this utility model;

[0044] Figure 3 A front view of an embodiment of the filter provided by this utility model;

[0045] Figure 4 A perspective view of an embodiment of the filter provided by this utility model;

[0046] Figure 5 An exploded view of an embodiment of the filter provided by this utility model;

[0047] Figure 6 An exploded view of another embodiment of the filter provided by this utility model;

[0048] Figure 7 A side view of an embodiment of the filter provided by this utility model;

[0049] Figure 8 A cross-sectional view of an embodiment of the filter provided by this utility model;

[0050] Figure 9 A schematic diagram of the structure of an FSA filter element in one embodiment of the filter provided by this utility model;

[0051] Figure 10 A top view of an FSA filter element in one embodiment of the filter provided by this utility model;

[0052] Figure 11A side view of an FSA filter element in one embodiment of the filter provided by this utility model;

[0053] Figure 12 A bottom view of the FSA filter element in one embodiment of the filter provided by this utility model.

[0054] Explanation of icon numbers:

[0055]

[0056]

[0057] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0058] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0059] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0060] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0061] In high-voltage electrical equipment of rail transit vehicles, forced air cooling is an effective heat dissipation method. Air filtration design needs to be considered at the air inlet and outlet to prevent large particles such as dust, as well as foreign objects such as willow catkins, hair, and water vapor from entering the equipment, thereby blocking the air duct and affecting heat dissipation.

[0062] In related technologies, large particles such as dust and water vapor filtered by air filters will settle, requiring a separate dirt collection structure to collect the foreign matter, resulting in a complex structure.

[0063] Based on the above problems, this utility model proposes a filter 10, which aims to provide a filter 10 that is compatible with foreign object collection function, so as to simplify the structural design.

[0064] Please see Figures 1 to 4 In one embodiment of the present invention, the filter 10 includes a filter body 11, a first clamping plate 12, and a second clamping plate 13; the first clamping plate 12 is disposed on the air inlet side of the filter body 11; the second clamping plate 13 is disposed on the air outlet side of the filter body 11, and the first clamping plate 12 and the second clamping plate 13 clamp the filter body 11; a dirt collection structure 121 is provided at the bottom of the first clamping plate 12 or the second clamping plate 13, the dirt collection structure 121 is disposed facing the air outlet side of the filter body 11, and the dirt collection structure 121 is configured to collect foreign objects filtered by the filter 100.

[0065] The technical solution of this utility model involves directly forming a dirt-collecting structure 121 on the first clamping plate 12 or the second clamping plate 13 of the filter screen 10. When the filter screen 10 is applied to the filter 100, the dirt-collecting structure 121 on the filter screen 10 is used to collect large particles such as dust and water vapor filtered by the filter 100, making the filter screen 10 compatible with the function of collecting foreign objects, eliminating the need to add a separate dirt-collecting structure 121 for collecting foreign objects. Therefore, this solution provides a filter screen 10 that is compatible with the function of collecting foreign objects, which simplifies the structural design. In addition, the filter screen 10 itself has a filtration function and can effectively filter foreign objects such as willow catkins and hair in the air.

[0066] In practical applications, a dirt collection structure 121 can be formed at the bottom of the first clamping plate 12 or at the bottom of the second clamping plate 13, as long as the dirt collection structure 121 can collect large particles of foreign matter filtered by the filter 100.

[0067] Furthermore, the sludge collection structure 121 can collect foreign objects in the form of a sludge collection tank 12a or in the form of a sludge collection box.

[0068] It should be noted that, since the filter body 11 is usually made of relatively soft wire mesh, a first clamping plate 12 and a second clamping plate 13 are used to clamp the filter body 11 to prevent deformation during use. Furthermore, the first clamping plate 12 has spaced-apart first openings that communicate with the filter holes on the filter body 11, and the second clamping plate 13 has spaced-apart second openings that also communicate with the filter holes on the filter body 11. This allows outside air to smoothly enter the filter body 11 through the first openings on the first clamping plate 12, undergoing primary filtration through the filter holes on the filter body 11. This effectively filters out foreign matter such as willow catkins and hair from the air. The filtered air then flows through the second openings on the second clamping plate 13 to the FSA filter element 30 of the filter 100 for secondary filtration.

[0069] In some embodiments, the filter body 11 can be cut from stainless steel wire mesh of different mesh counts.

[0070] In practical applications, the first clamping plate 12 and the second clamping plate 13 can be connected by bolts, clips, adhesives, or other methods to ensure the clamping strength of the first clamping plate 12 and the second clamping plate 13 on the filter body 11. Furthermore, the first clamping plate 12 and the second clamping plate 13 can be made of materials such as aluminum alloy, aluminum, titanium, or magnesium alloy.

[0071] Please see Figures 1 to 4 In one embodiment of the present invention, the dirt collection structure 121 is located at the bottom of the first clamping plate 12, and the filter body 11 and the second clamping plate 13 are both located above the dirt collection structure 121.

[0072] With this configuration, a dirt collection structure 121 is formed at the bottom of the first clamping plate 12, so that the filter body 11 and the second clamping plate 13 are located above the dirt collection structure 121. This allows the dirt collection structure 121 to collect not only large particles of foreign matter such as dust and water vapor filtered by the FSA filter element 30 on the filter 100, but also large particles of foreign matter such as dust and water vapor filtered by the filter body 11.

[0073] In some embodiments, the sewage collection structure 121 and the first clamping plate 12 are integrally formed, which can simplify the manufacturing process and ensure the reliability of the connection between the sewage collection structure 121 and the first clamping plate 12.

[0074] Please see Figure 2In one embodiment of this utility model, the dirt collection structure 121 includes an extension plate 1211, a first bent plate 1212, and a second bent plate 1213; one side of the extension plate 1211 is connected to the bottom of the first clamping plate 12, and the other side of the extension plate 1211 extends away from the first clamping plate 12; one side of the first bent plate 1212 is connected to the side of the extension plate 1211 away from the first clamping plate 12, and the other side of the first bent plate 1212 extends toward the air outlet side of the filter body 11; one side of the second bent plate 1213 is connected to the side of the first bent plate 1212 away from the extension plate 1211, and the second bent plate 1213 is disposed opposite to the extension plate 1211; the extension plate 1211, the first bent plate 1212, and the second bent plate 1213 enclose to form a dirt collection trough 12a.

[0075] This configuration, using an extension plate 1211, a first bent plate 1212, and a second bent plate 1213 to form a sludge collection trough 12a, allows the sludge collection trough 12a to collect large particles and water vapor filtered by the filter 100. This also allows the sludge collection structure 121 to better receive the large particles and water vapor flowing down from the filter 100. Furthermore, the design of the second bent plate 1213 also provides displacement constraint with the frame 20 of the filter 100, reducing the risk of the sludge collection structure 121 shaking during equipment operation.

[0076] In some embodiments, the extension plate 1211, the first bending plate 1212, and the second bending plate 1213 can be integrally formed. Specifically, a whole plate can be extended from the bottom of the first clamping plate 12 to be bent twice, thereby forming the extension plate 1211, the first extension plate 1211, and the second extension plate 1211. The manufacturing process is relatively simple.

[0077] Please see Figure 4 In one embodiment of the present invention, the first bent plate 1212 is provided with a dirt removal hole 12b that communicates with the dirt collection tank 12a.

[0078] With this design, the sludge removal hole 12b can discharge the foreign objects collected in the sludge collection tank 12a, which can clean the sludge collection tank 12a in a timely manner and prevent foreign objects from accumulating in the sludge collection tank 12a and causing odors, mold, etc.

[0079] In practical applications, one or at least two cleaning holes 12b can be provided. At least two cleaning holes 12b are distributed at intervals at the bottom of the sludge collection tank 12a, which can quickly discharge foreign objects in the sludge collection tank 12a.

[0080] Please see Figures 1 to 3In one embodiment of the present invention, the filter screen 10 further includes a first connector 14, which passes through the first clamping plate 12 and the second clamping plate 13 and is used to lock the first clamping plate 12 and the second clamping plate 13.

[0081] With this configuration, the first connector 14 passes through the first clamping plate 12 and the second clamping plate 13 to lock the first clamping plate 12 and the second clamping plate 13 together. This connection does not involve welding or heat input, thus preventing the filter screen 10 from deforming severely due to heat. This results in good control of the overall deformation of the filter screen 10. Moreover, compared with welding, the connection method using the first connector 14 is more cost-effective.

[0082] For example, the first connector 14 can be a rivet. The number and spacing of the rivets can be reasonably set according to the different length and width dimensions of the filter screen 10 to ensure the connection strength between the first clamping plate 12 and the second clamping plate 13.

[0083] Please see Figures 1 to 4 In one embodiment of this utility model, the first clamping plate 12 and / or the second clamping plate 13 are aluminum plates or aluminum alloy plates.

[0084] With this configuration, using aluminum plates or aluminum alloy plates as the first clamping plate 12 and the second clamping plate 13, the weight of the first clamping plate 12 and the second clamping plate 13 can be reduced, making the overall weight of the filter screen 10 lighter, thus achieving the lightweight effect of the filter screen 10. Compared with using stainless steel as the first clamping plate 12 and the second clamping plate 13, the overall weight of the filter screen 10 can be reduced by 50%.

[0085] Of course, in other embodiments, the first clamping plate 12 and the second clamping plate 13 can also be made of lightweight materials such as titanium and magnesium alloys.

[0086] Please see Figure 1 In one embodiment of the present invention, the first clamping plate 12 is provided with a folded edge 122 on one side edge near the second clamping plate 13, and the filter body 11 is accommodated in the limiting space formed by the folded edge 122.

[0087] With this configuration, the filter body 11 can be installed within the limiting space formed by the folded edge 122. The folded edge 122 limits the filter body 11 around its perimeter, preventing the edges of the filter body 11 from becoming loose and affecting its performance.

[0088] Please see Figures 5 to 12The present invention also proposes a filter 100, which includes a frame 20, an FSA filter element 30 and a filter screen 10. The specific structure of the filter screen 10 is as described in the above embodiments. Since the filter 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0089] The FSA filter element 30 is located on the frame 20; the filter screen 10 is located on the air inlet side of the FSA filter element 30, and the dirt collection structure 121 of the filter screen 10 is configured to collect foreign objects filtered by the FSA filter element 30.

[0090] Understandably, filter 100 can be installed at the air inlet of the equipment. The equipment can be equipped with a centrifugal or axial fan, achieving forced air cooling through the duct layout. Under the influence of the airflow, external foreign matter first undergoes primary filtration through filter screen 10, and then secondary filtration through FSA filter element 30. This achieves both primary filtration by filter screen 10 and secondary filtration by centrifugal sedimentation, improving the air filtration effect. Foreign matter in the air can be separated and settled at FSA filter element 30. Large particles such as dust and water vapor that settle can be collected by the dirt collection structure 121 on filter screen 10, making filter screen 10 compatible with foreign matter collection without the need for a separate dirt collection structure 121. The separated air can then continue to flow into the equipment.

[0091] Please see Figure 8 In one embodiment of the present invention, the frame 20 is provided with a guide plate 21 and a drain port 24 communicating with the FSA filter element 30. The guide plate 21 is located below the drain port 24 and is configured to guide foreign matter flowing out of the drain port 24 to the collection structure 121.

[0092] With this configuration, when air passes through the FSA filter element 30, large particles such as dust and water vapor are separated. The foreign objects and water vapor settle and flow from the drain outlet 24 to the guide plate 21. Then, guided by the guide plate 21, they smoothly enter the dirt collection structure 121 for foreign object collection.

[0093] In some embodiments, the deflector plate 21 can be welded to the frame 20 to ensure the installation reliability of the deflector plate 21.

[0094] Please see Figure 8 In one embodiment of the present invention, one side of the guide plate 21 is connected to the frame 20, and the other side of the guide plate 21 is inclined toward the dirt collection structure 121.

[0095] With this configuration, when foreign objects settle and flow from the drain outlet 24 to the guide plate 21, they can more easily enter the collection structure 121 for collection under the action of gravity through the inclined guide plate 21, thus improving the foreign object collection effect.

[0096] Please see Figure 8 In one embodiment of this utility model, the dirt collection structure 121 includes an extension plate 1211, a first bent plate 1212, and a second bent plate 1213; one side of the extension plate 1211 is connected to the bottom of the first clamping plate 12, and the other side of the extension plate 1211 extends away from the first clamping plate 12; one side of the first bent plate 1212 is connected to the side of the extension plate 1211 away from the first clamping plate 12, and the other side of the first bent plate 1212 extends toward the air outlet side of the filter body 11; one side of the second bent plate 1213 is connected to the side of the first bent plate 1212 away from the extension plate 1211, and the second bent plate 1213 is disposed opposite to the extension plate 1211; the extension plate 1211, the first bent plate 1212, and the second bent plate 1213 enclose to form a dirt collection trough 12a; the guide plate 21 is supported on the side of the second bent plate 1213 away from the first bent plate 1212.

[0097] This configuration, using the extension plate 1211, the first bending plate 1212, and the second bending plate 1213 to form a sludge collection tank 12a, allows the sludge collection tank 12a to collect large particles of foreign matter such as dust and water vapor filtered by the filter 100. This also allows the sludge collection structure 121 to better receive the large particles of foreign matter such as dust and water vapor flowing down from the filter 100. Furthermore, by supporting the guide plate 21 on the second bending plate 1213, the guide plate 21 can be supported by the second bending plate 1213. This allows foreign matter on the guide plate 21 to flow smoothly into the sludge collection tank 12a, and also improves the installation reliability of the guide plate 21.

[0098] Please see Figure 8 In one embodiment of the present invention, the bottom of the frame 20 is provided with a mounting flange 22, which abuts against the second bending plate 1213.

[0099] With this configuration, the mounting flange 22 of the frame 20 abuts against the second bending plate 1213, which can constrain the displacement of the sewage collection structure 121 and limit its movement, thereby reducing the risk of the sewage collection structure 121 shaking during equipment operation.

[0100] In some embodiments, a plate at the bottom of the frame 20 can be flipped downwards to form an mounting flange 22, which is a relatively simple manufacturing process.

[0101] Please see Figure 8In one embodiment of the present invention, the first bent plate 1212 is provided with a cleaning hole 12b communicating with the sludge collection tank 12a. The first bent plate 1212 is inclined downward along the direction away from the extension plate 1211 and close to the extension plate 1211, and the cleaning hole 12b is located close to the extension plate 1211.

[0102] With this configuration, by placing the cleaning hole 12b close to the extension plate 1211, the cleaning hole 12b is positioned at a low horizontal level. After foreign objects enter the collection tank 12a, they can automatically flow to the cleaning hole 12b under the action of gravity through the inclined first bending plate 1212, and be discharged outward from the cleaning hole 12b. This allows for timely cleaning of the collection tank 12a and prevents foreign objects from accumulating in the collection tank 12a and causing odors, mold, and other problems.

[0103] Please see Figures 9 to 12 In one embodiment of the present invention, the FSA filter element 30 includes a bottom connecting plate 31, a top connecting plate 32, and a filter element tube 33; the bottom connecting plate 31 is connected to the frame 20; the top connecting plate 32 is connected to the frame 20 and is located above the bottom connecting plate 31, with the top connecting plate 32 and the bottom connecting plate 31 being disposed opposite to each other; the filter element tube 33 is connected between the bottom connecting plate 31 and the top connecting plate 32, and the filter element tube 33 is provided in at least two rows, with at least two rows of filter element tubes 33 distributed at intervals from the direction close to the filter screen 10 to the direction away from the filter screen 10, and adjacent rows of filter element tubes 33 are staggered.

[0104] With this configuration, under the influence of the flow field, air flows through the filter screen 10 and enters the FSA filter element 30 from the air inlet side. The air first passes through the row of filter tubes 33 closest to the air inlet side. Passing through this layer of filter tubes 33 can reduce the airflow resistance and guide the air to the rear row of filter tubes 33. After the air collides with the rear row of filter tubes 33, foreign objects in the air will accumulate on the inner wall of the rear row of filter tubes 33 and settle under the action of gravity. The separated gas continues to flow along the inner wall of the rear row of filter tubes 33 to generate vortices and enters the equipment after flowing through the filter tubes 33.

[0105] In some embodiments, the filter tube 33 may include three rows, wherein the row of filter tubes 33 closest to the air inlet side is a guide tube 331, the guide tube 331 is a smooth circular convex structure, and the filter tubes 33 in the next two rows are filter tubes 332. Under the influence of the flow field, air flows through the filter screen 10 and enters the FSA filter element 30 from the air inlet side. The air first passes through the guide tube 331, which reduces the airflow resistance and guides the air to the rear filter tubes 332. The air first collides with the first row of filter tubes 332, and some foreign objects in the air will accumulate on the inner wall of the first row of filter tubes 332 and settle under gravity. The remaining foreign objects continue to flow into the second row of filter tubes 332 with the airflow. The air then collides with the second row of filter tubes 332, and the remaining foreign objects in the air will accumulate on the inner wall of the second row of filter tubes 332 and settle under gravity. After being separated by the two rows of filter tubes 332, most of the foreign objects can be effectively filtered. Understandably, the frame 20 is provided with a drain outlet 24 at the positions corresponding to the first row of filter pipes 332 and the second row of filter pipes 332. Foreign objects and water vapor settle and flow from the drain outlet 24 to the guide plate 21, and then smoothly enter the dirt collection structure 121 under the guidance of the guide plate 21, so as to collect foreign objects through the dirt collection structure 121.

[0106] Please see Figure 8 , Figure 11 In one embodiment of the present invention, a baffle 311 is provided on the side of the bottom connecting plate 31 away from the filter screen 10. The baffle 311 is configured to block water vapor that settles from the filter tube 33.

[0107] With this configuration, after the settled water vapor flows to the bottom connecting plate 31, some of the water vapor will flow to the air outlet side of the FSA filter element 30. The design of the baffle 311 can block foreign objects to prevent the settled water vapor from entering the air outlet side of the FSA filter element 30, thereby preventing water vapor from entering the interior of the equipment from the air outlet side of the FSA filter element 30.

[0108] In some embodiments, the bottom connecting plate 31 may be extended on the side away from the filter screen 10, and the extended portion may be bent upward to form a retaining edge 311.

[0109] Please see Figure 5 , Figure 6 In one embodiment of the present invention, a first connecting plate 123 is provided around the periphery of the first clamping plate 12, a second connecting plate 23 is provided around the periphery of the frame 20, and the filter 100 further includes a second connecting member 40, which passes through the first connecting plate 123 and the second connecting plate 23.

[0110] With this configuration, the second connector 40 is inserted through the first connecting plate 123 of the first clamping plate 12 and the second connecting plate 23 of the frame 20 to connect the filter screen 10 to the frame 20. This does not involve welding or heat input, thus preventing the filter screen 10 from deforming severely due to heat and ensuring good control over the overall deformation of the filter screen 10.

[0111] For example, the second connector 40 can also be a rivet. The number and spacing of the rivets can be reasonably set according to the different length and width dimensions of the filter screen 10 to ensure the connection strength between the filter screen 10 and the frame 20.

[0112] This utility model also proposes an electrical device, which includes a device body and a filter 100. The specific structure of the filter 100 is as described in the above embodiments. Since this electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0113] The equipment body is equipped with an air duct, an air inlet and an air outlet connected to the air duct, and a fan is installed inside the air duct; the filter 100 is located at the air inlet.

[0114] In some embodiments, the electrical equipment can be a converter, and the equipment body includes a converter housing. The converter housing is provided with an air duct, an air inlet and an air outlet communicating with the air duct. A fan is provided in the air duct, which can be a centrifugal fan or an axial fan. Forced air cooling is achieved through the air duct layout. Under the action of the flow field, external foreign objects are first filtered by the filter screen 10, and then filtered by the FSA filter element 30. This achieves primary filtration by the filter screen 10 and secondary filtration by centrifugal sedimentation, which can improve the filtration effect of the air. Foreign objects in the air can be separated and settled at the FSA filter element 30. The settled dust and other large particles and water vapor can be collected by the dirt collection structure 121 on the filter screen 10, so that the filter screen 10 is compatible with the function of foreign object collection, without the need to add a separate dirt collection structure 121 for foreign object collection. The separated air can continue to flow into the interior of the converter housing.

[0115] In practical applications, converters can be used in equipment such as vehicles, airplanes, and ships.

[0116] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A filter screen, characterized in that, include: Filter body; The first clamping plate is located on the air inlet side of the filter body; The second clamping plate is located on the air outlet side of the filter body, and the first clamping plate and the second clamping plate clamp the filter body; the bottom of the first clamping plate or the second clamping plate is provided with a dirt collection structure, which is arranged facing the air outlet side of the filter body, and the dirt collection structure is configured to collect foreign objects filtered by the filter.

2. The filter screen as described in claim 1, characterized in that, The dirt collection structure is located at the bottom of the first clamping plate, and the filter body and the second clamping plate are both located above the dirt collection structure.

3. The filter screen as described in claim 2, characterized in that, The sewage collection structure includes: An extension plate, one side of which is connected to the bottom of the first clamping plate, and the other side of which extends away from the first clamping plate; The first bending plate has one side connected to the side of the extension plate away from the first clamping plate, and the other side of the first bending plate extends toward the air outlet side of the filter body. The second bent plate has one side connected to the side of the first bent plate away from the extension plate, and the second bent plate is disposed opposite to the extension plate; the extension plate, the first bent plate and the second bent plate together form a sludge collection trough.

4. The filter screen as described in claim 3, characterized in that, The first bent plate is provided with a dirt removal hole that communicates with the dirt collection tank.

5. The filter screen according to any one of claims 1 to 4, characterized in that, The filter screen also includes a first connector, which passes through the first clamping plate and the second clamping plate to lock the first clamping plate and the second clamping plate.

6. The filter screen according to any one of claims 1 to 4, characterized in that, The first clamping plate and / or the second clamping plate are aluminum plates or aluminum alloy plates.

7. The filter screen according to any one of claims 1 to 4, characterized in that, The first clamping plate has a folded edge on one side near the second clamping plate, and the filter body is accommodated within the limiting space formed by the folded edge.

8. A filter, characterized in that, include: frame; FSA filter element, wherein the FSA filter element is disposed in the frame; The filter screen according to any one of claims 1 to 7, wherein the filter screen is disposed on the air inlet side of the FSA filter element, and the dirt collection structure of the filter screen is configured to collect foreign matter filtered by the FSA filter element.

9. The filter as claimed in claim 8, characterized in that, The frame is provided with a guide plate and a drain port that communicates with the FSA filter element. The guide plate is located below the drain port and is configured to guide foreign matter flowing out of the drain port to the dirt collection structure.

10. The filter as claimed in claim 9, characterized in that, One side of the guide plate is connected to the frame, and the other side of the guide plate is inclined toward the sewage collection structure.

11. The filter as claimed in claim 10, characterized in that, The sewage collection structure includes: An extension plate, one side of which is connected to the bottom of the first clamping plate, and the other side of which extends away from the first clamping plate; The first bending plate has one side connected to the side of the extension plate away from the first clamping plate, and the other side of the first bending plate extends toward the air outlet side of the filter body. The second bent plate has one side connected to the side of the first bent plate away from the extension plate, and the second bent plate is disposed opposite to the extension plate; the extension plate, the first bent plate and the second bent plate together form a sludge collection trough; The guide plate is supported on the side of the second bent plate away from the first bent plate.

12. The filter as claimed in claim 11, characterized in that, The bottom of the frame is provided with a mounting flange, which abuts against the second bending plate.

13. The filter as claimed in claim 11, characterized in that, The first bent plate is provided with a cleaning hole that communicates with the sludge collection tank. The first bent plate is inclined downward along the direction away from the extension plate and close to the extension plate, and the cleaning hole is located close to the extension plate.

14. The filter as claimed in claim 8, characterized in that, The FSA filter element includes: Bottom connecting plate, connected to the frame; A top connecting plate is connected to the frame and located above the bottom connecting plate, with the top connecting plate and the bottom connecting plate being disposed opposite to each other; A filter element tube is connected between the bottom connecting plate and the top connecting plate. The filter element tube has at least two rows, and the at least two rows of filter element tubes are distributed at intervals from the direction close to the filter screen to the direction away from the filter screen, and the adjacent two rows of filter element tubes are staggered.

15. The filter as claimed in claim 14, characterized in that, The bottom connecting plate has a baffle on the side away from the filter screen, and the baffle is configured to block foreign objects settling from the filter tube.

16. The filter as claimed in claim 8, characterized in that, The first clamping plate has a first connecting plate around its periphery, the frame has a second connecting plate around its periphery, and the filter also includes a second connecting member, which passes through the first connecting plate and the second connecting plate.

17. An electrical device, characterized in that, include: The equipment body is provided with an air duct, an air inlet and an air outlet connected to the air duct, and a fan is provided inside the air duct; The filter as described in any one of claims 8 to 16, wherein the filter is disposed at the air inlet.

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