Spliced filter screen and frequency converter

Abstract

The utility model is applicable to the technical field of air purification, and provides a splicing type filter screen and a frequency converter, the splicing type filter screen comprises a bottom shell part and a surface cover part, the bottom shell part is provided with a mounting groove for accommodating a filter element, the filter element is arranged in the mounting groove, the surface cover part covers an opening part of the mounting groove, the bottom shell part comprises a plurality of bottom shell splicing parts, and the bottom shell splicing parts are arranged on the surface cover part. A first splicing structure is arranged between every two adjacent bottom shell splicing parts, the surface cover part comprises a plurality of surface cover splicing parts, and a second splicing structure is arranged between every two adjacent surface cover splicing parts. The frequency converter comprises any one of the spliced filter screens. The proper bottom shell splicing part can be selected according to the size of the ventilation opening, and the bottom shell splicing part is spliced through the first splicing structure. The proper surface cover splicing parts can be selected according to the size of the ventilation opening, the surface cover splicing parts are spliced through the second splicing structures, and finally the filter screen overall structure matched with the size of the ventilation opening is formed.

Description

Technical Field

[0001] The utility model belongs to the technical field of air purification, and in particular relates to a spliced ​​filter screen and a frequency converter. Background Art

[0002] To ensure effective heat dissipation during operation, cabinet-type equipment such as inverters are typically equipped with ventilation openings. To prevent external dust and other impurities from entering the equipment through the ventilation openings and potentially affecting its normal operation, filters are typically installed in these openings. Due to the varying sizes of equipment, the dimensions of ventilation openings vary from device to device. However, currently available filters are mostly fixed in size, resulting in poor applicability. Utility Model Content

[0003] The purpose of the utility model is to provide a spliced ​​filter screen and a frequency converter, aiming to solve the technical problem of poor applicability of most filters in the prior art during installation.

[0004] The present utility model is implemented as follows: in a first aspect, a spliced ​​filter screen is provided, the spliced ​​filter screen comprising a bottom shell portion and a surface cover portion, the bottom shell portion having a mounting groove for accommodating a filter element, the surface cover portion covering the mouth of the mounting groove, the bottom shell portion comprising at least two bottom shell splicing portions, and two adjacent bottom shell splicing portions are detachably connected via a first splicing structure, the surface cover portion comprising at least two surface cover splicing portions, and two adjacent surface cover splicing portions are detachably connected via a second splicing structure, and the bottom shell portion and the surface cover portion are detachably connected via a third splicing structure.

[0005] In an optional embodiment, the bottom shell portion includes two first splicing portions, the first splicing structure includes a first buckle portion and a first slot portion that adapt to each other, and both of the first splicing portions are provided with the first buckle portion and the first slot portion.

[0006] In an optional embodiment, the bottom shell splicing part includes at least one second splicing part and two first splicing parts, and the second splicing parts are located between the two first splicing parts; the first splicing structure includes a first snap-fit ​​part and a first slot part that are adapted to each other, and the second splicing part and the first splicing part are both provided with the first snap-fit ​​part and / or the first slot part.

[0007] In an optional embodiment, the first buckle portion is a flat buckle, and the first slot portion is a flat slot.

[0008] In an optional embodiment, the face cover splicing portion includes at least one third splicing portion and two fourth splicing portions, the third splicing portion is located between the two fourth splicing portions, the second splicing structure includes a second snap-fit ​​portion and a second slot portion that fit together, and the third splicing portion and the fourth splicing portion are both provided with the second snap-fit ​​portion and / or the second slot portion.

[0009] In an optional embodiment, the second buckle portion is a circular buckle, and the second slot portion is a circular slot.

[0010] In an optional embodiment, the bottom shell portion is provided with a plurality of ventilation holes, and the surface cover portion is provided with a plurality of louver air vents.

[0011] In an optional embodiment, the third splicing structure includes a third snap-fit ​​portion and a third slot portion that are compatible with each other, the third snap-fit ​​portion is arranged at the top edge portion of the mounting groove, and the third slot portion is arranged at the edge portion of the surface cover portion; when the surface cover portion is covered on the mouth of the mounting groove, it is clamped and fixed to the bottom shell portion through the third splicing structure.

[0012] In an optional embodiment, the bottom shell portion includes two bottom shell splicing portions with a width of 250 mm, and the surface cover portion includes two surface cover splicing portions with a width of 250 mm; or, the bottom shell portion includes two bottom shell splicing portions with a width of 250 mm and one bottom shell splicing portion with a width of 100 mm, and the surface cover portion includes two surface cover splicing portions with a width of 250 mm and one surface cover splicing portion with a width of 100 mm; or, the bottom shell portion includes two bottom shell splicing portions with a width of 250 mm and two bottom shell splicing portions with a width of 150 mm, and the surface cover portion includes two surface cover splicing portions with a width of 250 mm and two surface cover splicing portions with a width of 150 mm.

[0013] In a second aspect, an inverter is provided, comprising a housing and the spliced ​​filter described in any one of the above items, wherein the spliced ​​filter is arranged at a vent of the housing.

[0014] The technical effect of the present invention compared to the prior art is that multiple bottom shell splicing parts can be detachably connected to form a bottom shell portion via a first splicing structure, and multiple surface cover splicing parts can be detachably connected to form a surface cover portion via a second splicing structure. Furthermore, the bottom shell portion has a mounting groove for accommodating a filter element. The bottom shell portion and the surface cover portion are independently provided, allowing the filter element to be placed in the mounting groove of the bottom shell portion. The surface cover portion is positioned over the opening of the mounting groove to press the filter element into the mounting groove. Furthermore, the bottom shell portion and the surface cover portion are detachably connected via a third splicing structure to form the entire filter screen. Compared with the filter structure in the prior art, before installing the filter, a bottom shell splicing part of an appropriate size and a suitable number of bottom shell splicing parts can be selected according to the size of the vent, and the bottom shell splicing parts can be disassembled and spliced ​​together through the first splicing structure, and a surface cover splicing part of an appropriate size and a suitable number of surface cover splicing parts can be selected according to the size of the vent, and the surface cover splicing parts can be disassembled and spliced ​​together through the second splicing structure, finally forming an overall filter structure that is adapted to the size of the vent on the equipment shell, thereby avoiding the phenomenon of mismatch with the vent size during the filter installation process, thereby making the overall installation flexibility of the filter better, improving the applicability of the filter installation, and also making the installation of the filter more convenient and quick; in addition, during production, only standard-sized bottom shell splicing parts and surface cover splicing parts need to be produced, that is, they can adapt to vents of different widths, simplifying the production process and reducing production costs.

[0015] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a structural diagram of a spliced ​​filter screen provided by an embodiment of the present invention;

[0018] Figure 2 This is a schematic structural diagram of a bottom shell portion used in one embodiment of the present utility model;

[0019] Figure 3 This is a schematic structural diagram of a face cover portion used in one embodiment of the present utility model;

[0020] Figure 4 This is a structural diagram of a spliced ​​filter screen provided by another embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the explosion structure of the spliced ​​filter provided by another embodiment of the utility model Figure 1 ;

[0022] Figure 6 This is a schematic diagram of the explosion structure of the spliced ​​filter provided by another embodiment of the utility model Figure 2 ;

[0023] Figure 7 This is a structural diagram of the bottom shell portion in a spliced ​​state adopted in another embodiment of the present invention;

[0024] Figure 8 This is a schematic structural diagram of another embodiment of the present invention in which the bottom shell portion is disassembled;

[0025] Figure 9 yes Figure 8 Schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 10 This is a structural diagram of the spliced ​​state of the cover portion used in another embodiment of the present invention;

[0027] Figure 11 This is a structural diagram of another embodiment of the present invention in which the cover portion is disassembled;

[0028] Figure 12 yes Figure 11 Schematic diagram of the enlarged structure at B in the middle;

[0029] Figure 13 This is a structural diagram of a spliced ​​filter screen provided by another embodiment of the present invention;

[0030] Figure 14 This is a structural diagram of a bottom shell portion used in yet another embodiment of the present utility model;

[0031] Figure 15 It is a structural schematic diagram of the face cover portion adopted in yet another embodiment of the present utility model.

[0032] Description of reference numerals:

[0033] 1. Bottom shell part; 11. Bottom shell splicing part; 111. First splicing part; 112. Second splicing part; 12. Mounting groove; 2. Surface cover part; 21. Surface cover splicing part; 211. Third splicing part; 212. Fourth splicing part; 3. Filter element; 4. First splicing structure; 41. First buckle part; 42. First slot part; 5. Second splicing structure; 51. Second buckle part; 52. Second slot part; 6. Third splicing structure. DETAILED DESCRIPTION

[0034] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0035] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0037] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0039] Please refer to Figures 1 to 15As shown, in an embodiment of the present invention, a spliced ​​filter screen is provided, which includes a bottom shell portion 1 and a surface cover portion 2. The bottom shell portion 1 has a mounting groove 12 for accommodating a filter element 3, and the surface cover portion 2 is covered on the mouth of the mounting groove 12. The bottom shell portion 1 includes at least two bottom shell splicing portions 11, and the two adjacent bottom shell splicing portions 11 are detachably connected through a first splicing structure 4. The surface cover portion 2 includes at least two surface cover splicing portions 21, and the two adjacent surface cover splicing portions 21 are detachably connected through a second splicing structure 5, and the bottom shell portion 1 and the surface cover portion 2 are detachably connected through a third splicing structure 6.

[0040] Specifically, bottom shell portion 1 is a component having a certain area and can be rectangular or otherwise shaped to match the vent. Mounting recess 12 is a receiving structure having a certain depth and can be shaped to match the shape of the filter element 3 to be installed. A ventilation structure for gas flow is provided on the bottom surface of mounting recess 12. The ventilation structure can be, for example, vent holes. If vent holes are used, the vent holes can be evenly distributed across the bottom surface of mounting recess 12.

[0041] The cover portion 2 also refers to a component with a certain area. The shape of the cover portion 2 can be rectangular or other shapes that match the bottom shell portion 1. A ventilation structure is also provided on the cover portion 2. The ventilation structure can be a ventilation hole, etc. When the ventilation structure adopts a ventilation hole, the ventilation holes can be evenly distributed on the cover portion 2.

[0042] The filter element 3 is a component that removes impurities, odors, and harmful substances from the gas. The filter element 3 allows air to pass through and purifies or separates the gas as it passes through. The filter element 3 can be made of materials such as synthetic fiber, activated carbon, glass fiber, and ceramic. The size of the filter element 3 is compatible with the mounting groove 12 of the bottom shell 1.

[0043] The bottom shell splicing portion 11 is formed by dividing the bottom shell portion 1. The bottom shell splicing portion 11 can be rectangular, triangular, or any other shape. The first splicing structure 4 is a structure that connects and fixes two or more objects to each other. The first splicing structure 4 can connect two adjacent bottom shell splicing portions 11 by plugging, snapping, or fastener connection.

[0044] The cover joint 21 is formed by dividing the cover 2. The cover joint 21 can be rectangular, triangular, or any other shape. The second joint structure 5 is also a structure that connects and fixes two or more objects to each other. The second joint structure 5 can connect two adjacent cover joints 21 by plugging, snapping, or fastener connection, making the assembly of the cover 2 more convenient and secure.

[0045] The third splicing structure 6 refers to a structure that connects and fixes two or more objects to each other. The third splicing structure 6 can realize the connection between the bottom shell part 1 and the cover part 2 by plugging, snapping or fastener connection.

[0046] The spliced ​​filter screen provided by the embodiment of the present invention can connect multiple bottom shell splicing parts 11 to each other through a first splicing structure 4 to form a bottom shell part 1 of different width sizes, and connect multiple surface cover splicing parts 21 to each other through a second splicing structure 5 to form a surface cover part 2 of different width sizes, wherein the size of the bottom shell part 1 is compatible with the size of the surface cover part 2. In addition, the bottom shell part 1 is provided with a mounting groove 12 for accommodating the filter element 3. By independently arranging the bottom shell part 1 and the surface cover part 2, the filter element 3 can be placed in the mounting groove 12 on the bottom shell part 1, and the filter element 3 can be limited in the mounting groove 12 by the surface cover part 2 covering the mouth of the mounting groove 12, and the bottom shell part 1 and the surface cover part 2 are connected and fixed by the third splicing structure 6 to form an integral structure. Compared with the filter structure in the prior art, before installing the filter, the bottom shell splicing part 11 of appropriate size and the appropriate number of bottom shell splicing parts 11 can be selected according to the size of the vent, and the bottom shell splicing parts 11 are spliced ​​together through the first splicing structure 4, and the surface cover splicing part 21 of appropriate size and the appropriate number of surface cover splicing parts 21 can be selected according to the size of the vent, and the surface cover splicing parts 21 are spliced ​​together through the second splicing structure 5, and finally a filter overall structure that is adapted to the size of the vent on the equipment shell is formed, thereby avoiding the phenomenon of mismatch with the vent size during the filter installation process, thereby making the overall installation flexibility of the filter better, improving the applicability of the filter installation, and making the installation of the filter more convenient and quick.

[0047] In addition, by splicing multiple bottom shell splicing parts 11 together through the first splicing structure 4 to form the bottom shell part 1, and splicing multiple surface cover splicing parts 21 together through the second splicing structure 5 to form the surface cover part 2, when producing the filter net, it is only necessary to modularly design the bottom shell splicing parts 11 and the surface cover splicing parts 21, and select the corresponding number of bottom shell splicing parts 11 and surface cover splicing parts 21 according to the size of the ventilation interface during installation to complete the matching of the filter net and the vent, so that the filter net can be flexibly matched with vents of different widths, thereby avoiding the situation of producing filter nets of corresponding sizes for vents of different sizes, improving the standardization and batch production of filter net parts, and effectively reducing the material cost of filter net production.

[0048] In an alternative embodiment, see Figure 5 and Figure 6The bottom shell splicing part 11 and the surface cover splicing part 21 can both be made of plastic or other materials, and the bottom shell splicing part 11 and the surface cover splicing part 21 can both be made by injection molding. Compared with the sheet metal welding processing method, the overall weight of the filter can be reduced, and the overall production and production cost of the filter can also be reduced. The splicing structure made of plastic material can be various interference fit buckle parts and slot parts. When splicing and disassembling the bottom shell splicing parts 11 and the surface cover splicing parts 21, the structure is simpler, and the splicing and disassembly are simpler and easier to operate.

[0049] In one embodiment, see Figure 2 The bottom shell portion 1 includes two first splicing parts 111, and the first splicing structure 4 includes a first snap-fit ​​part 41 and a first slot part 42 that fit together. The two first splicing parts 111 are both provided with a first snap-fit ​​part 41 and a first slot part 42. Specifically, the first splicing part 111 refers to a bottom shell splicing part 11 of preset specifications. When the bottom shell splicing part 11 is assembled, the two first splicing parts 111 are directly assembled into the bottom shell portion 1 through the first assembly structure. The first snap-fit ​​part 41 refers to a component with a certain length. The first snap-fit ​​part 41 can be columnar, block-shaped or strip-shaped. The first slot part 42 refers to a groove structure with a certain accommodating space. In addition, a snap-fit ​​structure that cooperates with the first slot part 42 can be provided on the first snap-fit ​​part 41, so that the first snap-fit ​​part 41 can be snap-fitted and fixed after being inserted into the first slot part 42. The two first splicing parts 111 are both provided with the first snap-fit ​​part 41 and the first slot part 42, which means that the first snap-fit ​​part 41 and the first slot part 42 are both provided on the same first splicing part 111. Specifically, the first snap-fit ​​part 41 and the first slot part 42 can be staggered on the same first splicing part 111. In this way, two identical first splicing parts 111 can be adapted and assembled with each other. During production, only one specification of the first splicing part 111 needs to be produced, which makes the production of the filter structure more convenient and saves production costs.

[0050] In one embodiment, see Figures 5 to 9The bottom shell splicing portion 11 includes at least one second splicing portion 112 and two first splicing portions 111, with each second splicing portion 112 located between the two first splicing portions 111. The first splicing structure 4 includes a first snap-fit ​​portion 41 and a first slot portion 42 that adapt to each other. Both the second splicing portion 112 and the first splicing portion 111 are provided with a first snap-fit ​​portion 41 and / or a first slot portion 42. Specifically, the first splicing portion 111 and the second splicing portion 112 refer to two different structures of the bottom shell splicing portion 11, wherein the first splicing portion 111 is the basic splicing portion and the second splicing portion 112 is the widened splicing portion. Therefore, when splicing bottom shells of different sizes, it is only necessary to add second splicing portions of different widths and quantities between the two first splicing portions. During assembly, the second splicing parts 112 can be connected to the first splicing parts 111 through the first splicing structure 4, so that the size of the bottom shell part 1 is adapted to the vent and the assembly of the bottom shell part 1 is more convenient.

[0051] In addition, the first snap-fit ​​portion 41 refers to a component having a certain length, and the first snap-fit ​​portion 41 can be in the shape of a column, a block, or a strip, etc. The first slot portion 42 refers to a groove structure having a certain accommodation space. A snap-fit ​​structure that cooperates with the first slot portion 42 can be provided on the first snap-fit ​​portion 41, so that the first snap-fit ​​portion 41 can be snap-fitted and fixed after being inserted into the first slot portion 42. At the same time, the second splicing portion 112 and the first splicing portion 111 are both provided with the first snap-fit ​​portion 41 and / or the first slot portion 42, which can include the following situations: Situation 1, the first snap-fit ​​portion 41 is provided on the first splicing portion 111, and the first slot portion 42 is provided on the second splicing portion 112. Situation 2, the first slot portion 42 is provided on the first splicing portion 111, and the first snap-fit ​​portion 41 is provided on the second splicing portion 112. In case three, the first snap-fit ​​portion 41 and the first slot portion 42 are provided on both the first splicing portion 111 and the second splicing portion 112, wherein the first snap-fit ​​portion 41 and the first slot portion 42 can be alternately arranged, as long as the second splicing portion 112 can be adapted and connected to the two first splicing portions 111.

[0052] Based on the above-mentioned features of the first splicing portion 111 and the second splicing portion 112, please refer to Figure 13 and Figure 14There are multiple second splicing parts 112, and two adjacent second splicing parts 112 are connected by the first splicing structure 4. Similarly, the first splicing structure 4 includes a first snap-fit ​​part 41 and a first slot part 42 that adapt to each other. The first snap-fit ​​part 41 and / or the first slot part 42 can be provided on each of the two second splicing parts 112. Specifically, multiple second splicing parts 112 can be arranged side by side in sequence. By providing multiple second splicing parts 112 between the two first splicing parts 111, the number of second splicing parts 112 can be selected according to the size of the vent when the filter is installed, so that the overall size of the bottom shell part 1 is adapted to the vent, making the installation of the filter more flexible and adaptable.

[0053] In an alternative embodiment, see Figure 9 The first latch portion 41 includes a block body and an insertion protrusion. One end of the block body is connected to the bottom shell splicing portion 11 provided with the first latch portion 41. The insertion protrusion is provided on the other end of the block body. There is a height difference between the insertion protrusion and the block body, and at least a portion of the insertion protrusion is higher than the block body. Both ends of the first slot portion 42 are open. When the first latch portion 41 and the first slot portion 42 are mutually engaged, the block body and the insertion protrusion can be inserted from one end of the first slot portion 42 and the insertion protrusion can be extended from the other end of the first slot portion 42. Due to the height difference between the insertion protrusion and the block body, when the insertion protrusion extends from the other end of the first slot portion 42, the insertion protrusion will abut against the side of the first slot portion 42, preventing the insertion block from falling out of the first slot portion 42.

[0054] In an alternative embodiment, see Figure 9 The first snap portion 41 and the bottom shell splicing portion 11 provided with the first snap portion 41 are integrally formed, and the first snap portion 41 and the bottom shell splicing portion 11 can be injection molded. The first slot portion 42 and the bottom shell splicing portion 11 provided with the first slot portion 42 are integrally formed, and the first slot portion 42 and the bottom shell splicing portion 11 are injection molded, making the connection between the first slot portion 42 and the bottom shell splicing portion 11 more secure, thereby making the splicing between the two bottom shell splicing portions 11 more secure.

[0055] In one embodiment, see Figure 9 The first snap fastener 41 is a flat snap fastener, and the first slot 42 is a flat slot. Specifically, a flat snap fastener refers to a component with a smaller width dimension of the cross section, and a flat slot refers to a slot structure with a smaller height dimension of the cross section. By making the first snap fastener 41 a flat snap fastener and the first slot 42 a flat slot, the thickness of the bottom shell 1 is prevented from being increased by the provision of the first snap fastener 41 and the first slot 42. Even after the provision of the first snap fastener 41 and / or the first slot 42 on the bottom shell splicing portion 11, the thickness can still be maintained relatively thin, making the structure of the bottom shell 1 simpler and lighter.

[0056] In one embodiment, see Figure 5 、 Figure 6 as well as Figures 10 to 12 The cover splicing portion 21 includes at least one third splicing portion 211 and two fourth splicing portions 212. The third splicing portion 211 is located between the two fourth splicing portions 212. The second splicing structure 5 includes a second snap-fit ​​portion 51 and a second slot portion 52 that adapt to each other. The third splicing portion 211 and the fourth splicing portion 212 are both provided with a second snap-fit ​​portion 51 and / or a second slot portion 52. Specifically, the third splicing portion 211 and the fourth splicing portion 212 are two different structures of the cover splicing portion 21, wherein the fourth splicing portion 212 is a basic splicing portion and the third splicing portion 211 is a widened splicing portion. In this way, when splicing cover portions of different sizes, it is only necessary to add third splicing portions of different widths and quantities between the two fourth splicing portions 212. The second snap-fit ​​portion 51 refers to a component with a certain length. The second snap-fit ​​portion 51 can be columnar, block-shaped or strip-shaped. The second latching portion 52 is a groove structure with a certain accommodating space, such as a groove or a hole structure. Furthermore, the second snap-fit ​​portion 51 may be provided with a snap-fit ​​structure, such as a bump, that cooperates with the second latching portion 52, so that the second latching portion 51 can be inserted into the second latching portion 52 to achieve a snap-fit ​​connection between the two. The third splicing portion 211 and the fourth splicing portion 212 are both provided with the second latching portion 51 and / or the second latching portion 52, which may include the following:

[0057] In the first case, a second snap-fit ​​portion 51 is provided on the third splicing portion 211, and a second slot portion 52 is provided on the fourth splicing portion 212. In the second case, a second slot portion 52 is provided on the third splicing portion 211, and a second snap-fit ​​portion 51 is provided on the fourth splicing portion 212. In the third case, both the second snap-fit ​​portion 51 and the second slot portion 52 can be provided on the third splicing portion 211 and the fourth splicing portion 212. The second snap-fit ​​portion 51 and the second slot portion 52 on the third splicing portion 211 and the fourth splicing portion 212 can be staggered, as long as the third splicing portion 211 and the two fourth splicing portions 212 can be adapted to connect with each other.

[0058] In addition, by configuring the cover splicing portion 21 to be composed of at least one third splicing portion 211 and two fourth splicing portions 212, the third splicing portion 211 is located between the two fourth splicing portions 212. Both fourth splicing portions 212 are detachably connected to the third splicing portion 211 via the second splicing structure 5, thereby making assembly of the cover portion 2 more convenient while ensuring that the size of the cover portion 2 matches that of the bottom shell portion 1.

[0059] Based on the above-mentioned features of the third splicing portion 211 and the fourth splicing portion 212, please refer to Figure 15The number of the third splicing parts 211 is multiple, and two adjacent third splicing parts 211 are connected by the second splicing structure 5. The second splicing structure 5 includes a second snap-fit ​​part 51 and a second slot part 52 that adapt to each other, and the second snap-fit ​​part 51 and / or the second slot part 52 are provided on the two third splicing parts 211. Specifically, the multiple third splicing parts 211 can be arranged side by side in sequence. By providing multiple third splicing parts 211 between the two fourth splicing parts 212, the number of the third splicing parts 211 can be selected according to the size of the vent when the filter is installed, so that the overall size of the cover part 2 is adapted to the size of the mounting groove 12 on the bottom shell part 1, thereby making the installation of the filter more flexible and the applicability of the filter wider.

[0060] In another embodiment, see Figure 3 The surface cover splicing portion 21 includes two fourth splicing portions 212, and the two fourth splicing portions 212 are detachably connected through the second splicing structure 5. The second splicing structure 5 includes a second buckle portion 51 and a second slot portion 52 that adapt to each other. The second buckle portion 51 and the second slot portion 52 can be provided on both fourth splicing portions 212. Specifically. The fourth splicing portion 212 refers to a surface cover splicing portion 21 of a preset specification. The two fourth splicing portions 212 are directly assembled into the surface cover portion 2 through the second splicing structure. The third splicing portion 211 is not provided between the two fourth splicing portions 212, so that the filter can be applied to vents of smaller sizes, and the structure of the surface cover portion 2 can also be simpler.

[0061] In one embodiment, see Figure 12 The second buckle portion 51 is a circular buckle, and the second slot portion 52 is a circular slot. Specifically, a circular buckle refers to a buckle structure with a circular or nearly circular cross-section, and a circular slot refers to a slot structure with a circular or nearly circular cross-section. On the cover portion 2 having a greater overall thickness, the second buckle portion 51 can be configured as a circular buckle and the second slot portion 52 can be configured as a circular slot, thereby ensuring the connection strength of the two cover splicing portions 21 after splicing.

[0062] In an alternative embodiment, see Figure 12, the second snap-fit ​​portion 51 includes a column body and an anti-dropout block, the column body is connected to the face cover splicing portion 21 provided with the second snap-fit ​​portion 51 with an end, the anti-dropout block is arranged on the other end of the column body, and the size of the anti-dropout block is greater than the size of the second draw-in slot portion 52. Specifically, the column body refers to a component with a certain length, the anti-dropout block refers to a component with a certain volume, and the second draw-in slot portion 52 is a through-hole structure. When the two face cover splicing portions 21 are spliced, the column body and the anti-dropout block can be inserted from an opening of the second draw-in slot portion 52, and the anti-dropout block can be extended from the other opening of the second draw-in slot portion 52. At the same time, since the size of the anti-dropout block is greater than the size of the second draw-in slot portion 52, the anti-dropout block will abut on the sidewall around the other opening of the second draw-in slot portion 52, preventing the second snap-fit ​​portion 51 from being extracted from the second draw-in slot portion 52.

[0063] It should be noted that the column body and the anti-slip block are usually made of a material with a certain degree of elasticity, such as plastic. Therefore, although the size of the anti-slip block is larger than the size of the second slot portion 52, the anti-slip block can also pass through the second slot portion 52 by its own deformation. At the same time, after the second buckle portion 51 and the second slot portion 52 are plugged and installed, the anti-slip block can also be disengaged from the second slot portion 52 when the force applied to the two cover splicing portions 21 exceeds the deformation limit of the anti-slip block, thereby making the disassembly of the cover portion 2 more convenient and quick.

[0064] In an alternative embodiment, see Figure 12 The second buckle portion 51 and the surface cover splicing portion 21 provided with the second buckle portion 51 are an integrally formed structure. The second buckle portion 51 and the surface cover splicing portion 21 can be integrally injection molded, so that the splicing between the two surface cover splicing portions 21 is more secure.

[0065] In one embodiment, see Figure 5 , a plurality of ventilation holes are provided on the bottom shell portion 1, and a plurality of louver air outlets are provided on the surface cover portion 2. Specifically, the ventilation hole refers to a hole structure through which gas can pass, and the ventilation hole can be circular, rectangular or polygonal, etc. By providing a plurality of ventilation holes on the bottom shell portion 1, the gas can pass through the bottom shell portion 1 and contact the filter element 3, thereby facilitating the purification of the gas. The louver air outlet refers to a hole structure composed of louver parts evenly distributed in a main frame, wherein the main frame refers to a supporting structure surrounded by components with a certain length, and the louver part refers to a plate-like structure with a certain length. By forming the louver part and the main frame into a louver structure, the circulation of the airflow at the surface cover splicing portion 21 can be made more convenient. At the same time, the louver parts can be set at an angle to the plane where the main frame is located, and after the filter is installed, the louver air outlets on the surface cover splicing part 21 are all tilted downward, so that the louver air outlets can divert water falling on the surface cover part 2, avoiding water accumulation on the surface cover part 2 or rainwater entering the interior of the filter through the surface cover splicing part 21, thereby making the overall waterproof effect of the filter better.

[0066] In one embodiment, see Figure 5 The third splicing structure 6 includes a third snap-fitting portion and a third slot portion that fit together. The third snap-fitting portion is arranged at the top edge of the mounting groove 12, and the third slot portion is arranged at the edge of the face cover portion 2. When the face cover portion 2 is covered on the mouth of the mounting groove 12, it is clamped and fixed to the bottom shell portion 1 through the third splicing structure 6. Specifically, the third snap-fitting portion refers to a component with a certain height, and the third snap-fitting portion can be columnar or block-shaped. The third slot portion refers to a groove structure with a certain accommodating space, such as a groove or hole structure. When the face cover portion 2 is installed to the mouth of the mounting groove 12, the third snap-fitting portion can be inserted into the third slot portion, thereby realizing the clamping and fixing of the face cover portion 2, which can make the face cover portion 2 more firmly and reliably installed at the mouth of the mounting groove 12.

[0067] In one embodiment, see Figure 1 The bottom shell portion 1 includes two bottom shell splicing portions 11 with a width of 250 mm, and the cover portion 2 includes two cover splicing portions 21 with a width of 250 mm, so that the filter can adapt to the vent with a width of 500 mm; or, please refer to Figure 4 The bottom shell portion 1 includes two bottom shell splicing portions 11 with a width of 250 mm and one bottom shell splicing portion 11 with a width of 100 mm, and the cover portion 2 includes two cover splicing portions 21 with a width of 250 mm and one cover splicing portion 21 with a width of 100 mm, so that the filter can be adapted to the vent with a width of 600 mm; or, please refer to Figure 13 The bottom shell portion 1 includes two bottom shell splicing portions 11 with a width of 250 mm and two bottom shell splicing portions 11 with a width of 150 mm. The surface cover portion 2 includes two surface cover splicing portions 21 with a width of 250 mm and two surface cover splicing portions 21 with a width of 150 mm, so that the filter can adapt to the vent with a width of 800 mm.

[0068] In a second aspect, an inverter is provided, comprising a housing and any of the aforementioned spliced ​​filters. The spliced ​​filters are mounted on the vents of the inverter housing. It is understood that the beneficial effects of the second aspect can be found in the relevant description of the first aspect, and are not further elaborated here.

[0069] The above description is merely a preferred embodiment of the present invention and specifically describes the technical principles of the present invention. These descriptions are intended only to explain the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention, as well as other specific embodiments of the present invention that can be devised by those skilled in the art without inventive effort, shall be included within the scope of protection of the present invention.

Claims

1. A spliced ​​filter screen, characterized in that: It includes a bottom shell portion and a surface cover portion, the bottom shell portion has a mounting groove for accommodating a filter element, the surface cover portion is covered on the mouth of the mounting groove, the bottom shell portion includes at least two bottom shell splicing portions, and two adjacent bottom shell splicing portions are detachably connected via a first splicing structure, the surface cover portion includes at least two surface cover splicing portions, and two adjacent surface cover splicing portions are detachably connected via a second splicing structure, and the bottom shell portion and the surface cover portion are detachably connected via a third splicing structure.

2. The spliced ​​filter screen according to claim 1, characterized in that: The bottom shell portion includes two first splicing portions, the first splicing structure includes a first buckle portion and a first slot portion that adapt to each other, and both of the two first splicing portions are provided with the first buckle portion and the first slot portion.

3. The spliced ​​filter screen according to claim 1, characterized in that: The bottom shell splicing part includes at least one second splicing part and two first splicing parts, and the second splicing parts are located between the two first splicing parts; the first splicing structure includes a first snap-fit ​​part and a first slot part that adapt to each other, and the second splicing part and the first splicing part are both provided with the first snap-fit ​​part and / or the first slot part.

4. The spliced ​​filter screen according to claim 3, characterized in that: The first buckle portion is a flat buckle, and the first slot portion is a flat slot.

5. The spliced ​​filter screen according to claim 1, characterized in that: The surface cover splicing part includes at least one third splicing part and two fourth splicing parts, and the third splicing part is located between the two fourth splicing parts. The second splicing structure includes a second buckle part and a second slot part that adapt to each other. The third splicing part and the fourth splicing part are both provided with the second buckle part and / or the second slot part.

6. The spliced ​​filter screen according to claim 5, characterized in that: The second buckle portion is a circular buckle, and the second slot portion is a circular slot.

7. The spliced ​​filter screen according to any one of claims 1 to 6, characterized in that: The bottom shell portion is provided with a plurality of ventilation holes, and the surface cover portion is provided with a plurality of louver air outlets.

8. The spliced ​​filter screen according to any one of claims 1 to 6, characterized in that: The third splicing structure includes a third snap-fit ​​portion and a third slot portion that are adapted to each other. The third snap-fit ​​portion is arranged at the top edge of the mounting groove, and the third slot portion is arranged at the edge of the surface cover portion. When the surface cover portion covers the mouth of the mounting groove, it is clamped and fixed to the bottom shell portion through the third splicing structure.

9. The spliced ​​filter screen according to claim 1, wherein: The bottom shell portion includes two bottom shell splicing portions with a width of 250 mm, and the surface cover portion includes two surface cover splicing portions with a width of 250 mm; or, the bottom shell portion includes two bottom shell splicing portions with a width of 250 mm and one bottom shell splicing portion with a width of 100 mm, and the surface cover portion includes two surface cover splicing portions with a width of 250 mm and one surface cover splicing portion with a width of 100 mm; or, the bottom shell portion includes two bottom shell splicing portions with a width of 250 mm and two bottom shell splicing portions with a width of 150 mm, and the surface cover portion includes two surface cover splicing portions with a width of 250 mm and two surface cover splicing portions with a width of 150 mm.

10. A frequency converter, characterized in that: It comprises a shell and also comprises a spliced ​​filter screen as claimed in any one of claims 1 to 9, wherein the spliced ​​filter screen is arranged at the ventilation opening of the shell.

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