A protective screen assembly and frequency converter

Abstract

The utility model provides a kind of protective screen assembly and frequency converter, protective screen assembly includes: protective screen, the protective screen includes at least two filter units, at least two the filter unit is mutually spliced and forms the protective screen structure of whole, and gap is between adjacent two the filter unit, the filter unit can move, so that the size of the gap can be adjusted according to the temperature inside protective screen.According to the utility model, the gap can be adaptively adjusted according to the internal temperature, the heat dissipation can be enhanced or reduced, so as to improve the heat dissipation performance of the components while ensuring the protection and dustproof effect, improve the electrical safety performance, effectively solve the problem that the protective screen of the frequency converter in the prior art cannot meet the heat dissipation demand while realizing the protection function.

Description

Technical Field

[0001] This utility model relates to the field of frequency converter technology, specifically to a protective net assembly and a frequency converter. Background Technology

[0002] The production and development of frequency converters is continuously expanding and improving overall. Modern frequency converters operate in highly variable environments, and their protective measures are constantly being updated. Existing frequency converters use an integrated protective mesh structure, which makes maintenance and disassembly difficult. Furthermore, frequency converters with this integrated protective mesh structure have poor heat dissipation capabilities. For example, if there are internal temperature variations within the frequency converter, existing frequency converters cannot adaptively adjust their heat dissipation to accommodate these changes, thus failing to simultaneously fulfill both protective functions and heat dissipation requirements.

[0003] Because existing inverter protective nets have technical problems such as failing to meet heat dissipation requirements while achieving protective functions, this utility model researches and designs a protective net component and an inverter. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the defect that the protective net of the frequency converter in the prior art cannot meet the heat dissipation requirements while realizing the protective function, thereby providing a protective net component and a frequency converter.

[0005] To address the above problems, this utility model provides a protective net assembly, comprising:

[0006] A protective net, comprising at least two filter units, wherein the at least two filter units are spliced ​​together to form an integral protective net structure, and there is a gap between adjacent filter units. The filter units are movable, such that the size of the gap can be adjusted according to the temperature inside the protective net.

[0007] In some implementations...

[0008] When the temperature rises, the filter unit can move to increase the size of the gap between two adjacent filter units, that is, increase the flow cross-sectional area of ​​the gap; when the temperature falls, the filter unit can move to decrease the size of the gap between two adjacent filter units, that is, decrease the flow cross-sectional area of ​​the gap.

[0009] In some implementations...

[0010] The filter unit is a sheet-like structure with filter holes. The filter unit is provided with connection holes. The protective net also includes a ring buckle structure. The ring buckle structure connects the connection holes of adjacent filter units to connect adjacent filter units into one unit. When the ring buckle structure is inserted into the connection hole, the ring buckle structure and the connection hole form a gap fit so that the gap between the two adjacent filter units can be adjusted by the relative movement between the two adjacent filter units.

[0011] In some implementations...

[0012] The ring structure is a circular structure with a circular cross-section at any position and a diameter of d. The connecting hole is a circular hole with a diameter of D, and d < D. Alternatively, two adjacent filter units can be bent at the ring structure to form a fold, and multiple filter units can be folded sequentially to form an integral stack.

[0013] In some implementations...

[0014] It also includes a motion mechanism that can drive at least one of the filter units to move in order to increase or decrease the gap between two adjacent filter units.

[0015] In some implementations...

[0016] The motion mechanism includes a moving component and a guide rail. The moving component is disposed on the guide rail so that it can reciprocate along the guide rail. The moving component can move to the filter unit where the gap needs to be adjusted. The moving component can also be connected to the filter unit opposite to it and drive the filter unit to move by the movement of the moving component, so as to increase or decrease the gap between two adjacent filter units.

[0017] In some implementations...

[0018] The moving component is a magnetically attracted moving block, which can also generate magnetic force when energized to magnetically attract the filter unit opposite it, and drive the filter unit to move by the movement of the moving component; the motion mechanism also includes a motor, the guide rail is a screw structure with external threads, the magnetically attracted moving block has a hollow cavity and the inner peripheral wall of the hollow cavity is internally threaded, the moving component is sleeved on the external thread of the guide rail, so that the internal thread of the moving component and the external thread of the guide rail form a threaded engagement, the motor is set at one end of the guide rail to drive the guide rail to rotate, and the rotation of the guide rail can drive the moving component to move linearly along the direction of the guide rail.

[0019] In some implementations...

[0020] The motion mechanism includes an upper motion mechanism and a lower motion mechanism. The upper motion mechanism is opposite to the upper part of the protective net so that the upper part of the filter unit can be driven to move through the moving parts on the upper motion mechanism. The lower motion mechanism is opposite to the lower part of the protective net so that the lower end of the filter unit can be driven to move through the moving parts on the lower motion mechanism.

[0021] In some implementations...

[0022] The motion mechanism is also equipped with a temperature sensor, which can detect the temperature inside the protective net.

[0023] In some implementations...

[0024] It also includes a magnetic structure and a fixing sheet metal. The magnetic structure is disposed on the protective net and can magnetically connect the protective net to the fixing sheet metal.

[0025] In some implementations...

[0026] The magnetic attraction structure includes an upper magnetic attraction block and a lower magnetic attraction block. The upper magnetic attraction block is disposed at the upper end of the protective net, and the lower magnetic attraction block is disposed at the lower end of the protective net. The fixing sheet metal includes an upper fixing sheet metal and a lower fixing sheet metal. The upper end of the protective net can be fixed to the upper fixing sheet metal by the upper magnetic attraction block, and the lower end of the protective net can be fixed to the lower fixing sheet metal by the lower magnetic attraction block.

[0027] This utility model also provides a frequency converter, which includes the aforementioned protective net assembly and a frequency converter housing. The frequency converter housing has a ventilation opening, and the protective net assembly is disposed at the ventilation opening.

[0028] In some implementations...

[0029] The inverter housing includes an inverter top cover and an inverter bottom plate. When the protective net assembly includes an upper fixed sheet metal and a lower fixed sheet metal, the upper fixed sheet metal is fixed to the inverter top cover, and the lower fixed sheet metal is fixed to the inverter bottom plate.

[0030] The inverter includes an upper cover reinforcing rib and an assembly reinforcing rib. Both the upper cover reinforcing rib and the assembly reinforcing rib are installed on the inverter's upper cover. The upper fixed sheet metal is fixed to the inverter's upper cover through the assembly reinforcing rib.

[0031] In some implementations...

[0032] The inverter housing also includes two opposing side plates. When the protective net assembly also includes an upper motion mechanism and a lower motion mechanism, one end of the upper motion mechanism is fixed to one side plate of the inverter housing, and the other end of the upper motion mechanism is fixed to the other side plate of the inverter housing; one end of the lower motion mechanism is fixed to one side plate of the inverter housing, and the other end of the lower motion mechanism is fixed to the other side plate of the inverter housing.

[0033] The protective mesh assembly and frequency converter provided by this utility model have the following beneficial effects:

[0034] 1. This utility model comprises a protective mesh including at least two filter units, which are spliced ​​together to form an integral protective mesh structure. There is a gap between adjacent filter units, and the filter units are movable, allowing the size of the gap to be adjusted according to the internal temperature of the protective mesh. This enables the gap to be widened when the temperature rises to enhance airflow and internal heat dissipation, and narrowed when the temperature decreases to reduce airflow, thus improving both protective and filtration performance. It can achieve both protective (filtration) functions and auxiliary heat dissipation, and the gap can be adaptively adjusted according to the internal temperature to enhance or reduce heat dissipation. This ensures both protection and dust prevention while improving the heat dissipation performance of components and enhancing electrical safety performance, effectively solving the problem in existing inverter protective meshes that cannot simultaneously achieve protective functions and meet heat dissipation requirements.

[0035] 2. This utility model also provides connection holes on the filter unit and connects the connection holes of adjacent filter units through a ring-lock structure. The ring-lock structure and the connection hole are in a clearance fit, which allows the gap between the two adjacent filter units to be adjusted by the relative movement of the ring-lock structure. This effectively achieves the effect of adjusting the gap between the two adjacent filter units according to the temperature inside the protective mesh. Furthermore, through the ring-lock structure and the clearance fit with the connection hole, this utility model allows two adjacent filter units to be bent at the ring-lock structure to form a fold. Multiple filter units can be folded sequentially to form an overall stack, thereby improving the internal space utilization of the frequency converter, allowing for folding and storage, and saving space.

[0036] 3. This utility model further includes a motion mechanism in the protective net assembly. The motion mechanism drives at least one filter unit to move, thereby effectively adjusting the gap between two adjacent filter units. More preferably, the motion mechanism includes a moving component and a guide rail. The moving component drives the filter unit to move, and the moving component moves along the guide rail, thereby effectively adjusting the gap between adjacent filter units. More preferably, the moving component is a magnetic moving block, which generates magnetic force by energizing to magnetically attract the filter unit. The motion mechanism also includes a motor. The guide rail and the magnetic moving block are threaded together. The motor drives one end of the guide rail to rotate, so that the magnetic moving block forms a linear motion on the guide rail. When the magnetic moving block moves to be opposite the filter unit to be moved, the magnetic moving block is energized to generate magnetic attraction, thereby magnetically attracting the filter unit and moving it along the guide rail together with the magnetic moving block, thereby effectively achieving the purpose and effect of adjusting the gap between adjacent filter units.

[0037] 4. This utility model further incorporates a magnetic attraction structure and fixed sheet metal, allowing the upper or lower end of the protective net to be magnetically attached to the upper and lower fixed sheet metal, thus completing the installation between the protective net and the inverter housing. This installation method eliminates the need for existing threaded installation methods, enabling rapid installation and disassembly of the protective net and improving its efficiency. Attached Figure Description

[0038] Figure 1 This is a front view structural diagram of the inverter protection mesh assembly of this utility model;

[0039] Figure 2 This is an exploded structural diagram of the inverter protection mesh assembly of this utility model;

[0040] Figure 3 This is a schematic diagram of the upper structure of the protective netting of this utility model;

[0041] in: Figure 3 (A) is a front view of the upper structure of the protective netting;

[0042] Figure 3 (B) is a left view of the upper structure of the protective netting;

[0043] Figure 4 This is a schematic diagram of the lower layer structure of the protective net of this utility model;

[0044] in: Figure 4 (A) is a front view of the lower structure of the protective netting;

[0045] Figure 4 (B) is a left view of the lower structure of the protective netting;

[0046] Figure 4(C) is a bottom view of the lower structure of the protective netting;

[0047] Figure 5 These are three views of a single protective net of this utility model;

[0048] in: Figure 5 (A) is a front view of a single protective net;

[0049] Figure 5 (B) is a left view of a single protective net;

[0050] Figure 5 (C) is a bottom view of a single protective net;

[0051] Figure 6 This is a schematic diagram of the motion mechanism of the protective net assembly of this utility model.

[0052] The reference numerals in the attached figures are as follows:

[0053] 1. Inverter housing; 2. Protective mesh; 3. Ring-lock structure; 4. Magnetic structure; 41. Upper magnetic block; 42. Lower magnetic block; 5. Filter unit; 6. Connection hole; 7. Gap; 8. Ventilation port; 9. Inverter base plate; 10. Inverter top cover; 11. Upper end cover reinforcing rib; 12. Assembly reinforcing rib; 13. Power supply mounting plate; 14. Upper fixed sheet metal; 15. Lower fixed sheet metal; 16. Motion mechanism; 17. Upper motion mechanism; 18. Lower motion mechanism; 19. Temperature sensor; 20. Moving parts; 21. Motor; 22. Guide rail. Detailed Implementation

[0054] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0055] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0056] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0057] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0058] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0059] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0060] likeFigures 1-6 As shown, this utility model provides a protective net assembly, which includes:

[0061] The protective net 2 includes at least two filter units 5, which are spliced ​​together to form an integral protective net structure. There is a gap 7 between two adjacent filter units 5. The filter units 5 are movable, so that the size of the gap 7 can be adjusted according to the temperature inside the protective net 2.

[0062] This invention comprises a protective mesh 2 including at least two filter units 5, which are spliced ​​together to form an integral protective mesh structure. There is a gap between adjacent filter units 5, and the filter units 5 are movable. The size of the gap can be adjusted according to the internal temperature of the protective mesh 2. This allows the gap to be widened when the temperature rises to enhance airflow and internal heat dissipation, and narrowed when the temperature decreases to reduce airflow, thus improving both protective and filtration performance. It can achieve both protective (filtration) functions and auxiliary heat dissipation, and the gap can be adaptively adjusted according to the internal temperature to enhance or reduce heat dissipation. This ensures both protection and dust prevention while improving the heat dissipation performance of components and enhancing electrical safety performance. It effectively solves the problem in existing inverter protective meshes that cannot meet heat dissipation requirements while providing protection.

[0063] In some implementations...

[0064] When the temperature rises, the filter unit 5 can move to increase the size of the gap 7 between two adjacent filter units 5, that is, the flow cross-sectional area of ​​the gap 7 increases; when the temperature decreases, the filter unit 5 can move to decrease the size of the gap 7 between two adjacent filter units 5, that is, the flow cross-sectional area of ​​the gap 7 decreases.

[0065] This invention relates to the preferred motion relationship between the filter unit 5 and temperature changes. When the temperature rises, the gap between two adjacent filter units 5 is increased through movement, thereby increasing the flow cross-sectional area of ​​the gap and increasing the airflow within the inverter. This improves the heat dissipation performance of components and enhances electrical safety when the temperature rises. Conversely, when the temperature drops, the gap between adjacent filter units 5 is reduced through movement, thereby decreasing the airflow area and airflow. This reduces the heat dissipation performance of components and improves the protection and filtration performance inside the inverter. This achieves both protection and dust prevention while improving the heat dissipation performance of components and enhancing electrical safety, effectively solving the problem that existing inverter protective nets cannot meet heat dissipation requirements while providing protection.

[0066] See Figure 1 The protective mesh 2 is installed on one side of the inverter housing 1, while other components are installed on the unused side and heat is dissipated through the ventilation opening 8. Airflow inside the inverter passes through the protective mesh 2, transferring some of the heat to it. Excess heat is transferred to the inverter housing 1 through the filter unit 5 (preferably a fine mesh) and connection holes 6 on the protective mesh 2, allowing for heat exchange between the inverter housing 1 and the outside air, thus achieving a certain degree of auxiliary heat dissipation.

[0067] In some implementations...

[0068] The filter unit 5 is a sheet-like structure with filter holes. The filter unit 5 is provided with connection holes 6. The protective net also includes a ring buckle structure 3. The ring buckle structure 3 connects the connection holes 6 of adjacent filter units 5 to connect adjacent filter units 5 into one unit. When the ring buckle structure 3 passes into the connection hole 6, the ring buckle structure 3 and the connection hole 6 form a gap fit so that the gap 7 between the two adjacent filter units 5 can be adjusted by the relative movement between the two adjacent filter units 5.

[0069] This utility model also provides a connection hole 6 on the filter unit 5, and connects the connection hole 6 of the adjacent filter unit through the ring buckle structure 3. The ring buckle structure 3 and the connection hole 6 are in clearance fit, which can adjust the gap between the two adjacent filter units 5 by cooperating with the relative movement between the ring buckle structure 3 and the two adjacent filter units 5, effectively achieving the effect of adjusting the gap between the two adjacent filter units 5 according to the temperature inside the protective net.

[0070] In some implementations...

[0071] The ring structure 3 is a circular structure with a circular cross-section at any position and a diameter of d. The connecting hole 6 is a circular hole with a diameter of D, and d < D. Alternatively, two adjacent filter units 5 can be bent at the ring structure 3 to form a fold, and multiple filter units 5 can be folded sequentially to form an integral stack.

[0072] This invention uses a circular buckle structure and a circular hole 6 to create a gap fit between the two, ensuring the connection while also allowing adjustment of the gap between adjacent filter units 5. Through the buckle structure 3 and the gap fit with the connecting hole 6, this invention allows two adjacent filter units 5 to bend at the buckle structure to form a fold, and multiple filter units 5 can be folded sequentially to form a stack, thereby improving the internal space utilization of the inverter, allowing for folding and storage, and saving space.

[0073] See Figure 3The filter units of this utility model are connected by connecting holes 6 and connecting metal rings. There are gaps between individual filter units, which can be folded around the ring to store the entire protective net on one side. The magnetic attraction structure 4 can pull each other to ensure that the folded filter units will not be scattered.

[0074] See Figure 4 The adjacent filter units 5 connected by the ring-shaped structure 3 have gaps, which can be adjusted to fine-tune the installation length of the protective net when it is installed on the inverter housing 1. Furthermore, the through holes in the lower structure of the protective net can be bolted to the lower fixed sheet metal 15 to ensure the stability of the protective net.

[0075] See Figure 5 The filter unit 5 (preferably a fine mesh) on the protective net 2 can be cut and removed, allowing for the installation of circuit breakers, wires, and other components to avoid obstructing the inverter during installation. The fine mesh also prevents dust accumulation, keeping the inside of the inverter clean.

[0076] In some implementations...

[0077] It also includes a motion mechanism 16, which can drive at least one of the filter units 5 to move, thereby increasing or decreasing the gap between two adjacent filter units 5. This invention also utilizes the aforementioned motion mechanism to drive at least one filter unit to move, effectively adjusting the gap between two adjacent filter units.

[0078] In some implementations...

[0079] The motion mechanism 16 includes a moving component 20 and a guide rail 22. The moving component 20 is disposed on the guide rail 22 so that it can reciprocate along the guide rail 22. The moving component 20 can move to the filter unit 5 where the gap needs to be adjusted. The moving component 20 can also be connected to the filter unit 5 opposite to it and drive the filter unit 5 to move through the movement of the moving component 20, so as to increase or decrease the gap between two adjacent filter units 5.

[0080] This is the preferred structural form of the motion mechanism of this utility model. The motion component 20 of the motion mechanism drives the filter unit 5 to move. The motion component 20 moves along the guide rail 22, thereby effectively adjusting the gap between adjacent filter units 5.

[0081] In some implementations...

[0082] The moving component 20 is a magnetic moving block, which can also generate magnetic force when energized to magnetically attract the filter unit 5 opposite it, and drive the filter unit 5 to move by the movement of the moving component 20; the motion mechanism 16 also includes a motor 21, the guide rail 22 is a screw structure with external threads, the magnetic moving block has a hollow cavity and the inner peripheral wall of the hollow cavity is internally threaded, the moving component 20 is sleeved on the external thread of the guide rail 22, so that the internal thread of the moving component 20 and the external thread of the guide rail 22 form a threaded engagement, the motor 21 is set at one end of the guide rail 22 to drive the guide rail 22 to rotate, and the rotation of the guide rail 22 can drive the moving component 20 to move linearly along the direction of the guide rail 22.

[0083] This is a further preferred structural form of the moving component 20 of this utility model. The moving component 20 is preferably a magnetic moving block, which can generate magnetic force by being energized to magnetically attract the filter unit 5. The moving mechanism 16 also includes a motor 21. The guide rail 22 and the magnetic moving block are threadedly connected. The motor 21 drives one end of the guide rail 22 to rotate, so that the magnetic moving block forms a linear motion on the guide rail 22. When the magnetic moving block moves to be opposite the filter unit 5 that needs to be moved, the magnetic moving block is energized to generate magnetic attraction force, thereby magnetically attracting the filter unit 5 and moving it along the guide rail 22 together with the magnetic moving block, thereby effectively achieving the purpose and effect of adjusting the gap between adjacent filter units 5.

[0084] The protective net 2 of this utility model is preferably equipped with a magnetic structure 4, which can be adsorbed onto the upper fixed sheet metal 14 and the lower fixed sheet metal 15, ensuring convenient installation and enabling quick assembly and disassembly. The upper motion mechanism 17 and the lower motion mechanism 18 can be used to precisely adjust the gap of the protective net; the temperature sensor 19 automatically adjusts the protective net by monitoring the temperature inside the frequency converter in real time. When the temperature is too high, the motor 21 inside the fixed block with motor starts, driving the guide rail 22 to rotate, which in turn drives the moving part 20 (preferably the magnetic moving block) to move; when the magnetic moving block moves to a certain filter unit 5, it is energized and adsorbed, and the motor 21 is started again. After the target filter unit 5 is moved to a specific position, the magnetic moving block is de-energized and the adsorption is canceled, and the gap adjustment of the adjacent target filter units 5 is completed.

[0085] In some implementations...

[0086] The motion mechanism 16 includes an upper motion mechanism 17 and a lower motion mechanism 18. The upper motion mechanism 17 is opposite to the upper part of the protective net 2, so that the upper part of the filter unit 5 can be driven to move through the moving part 20 on the upper motion mechanism 17. The lower motion mechanism 18 is opposite to the lower part of the protective net 2, so that the lower end of the filter unit 5 can be driven to move through the moving part 20 on the lower motion mechanism 18.

[0087] This is a further preferred structural form of the motion mechanism of this utility model. The motion mechanism 16 preferably includes an upper motion mechanism 17 and a lower motion mechanism 18, which can be connected to the upper part of the filter unit 5 to drive the upper part, and connected to the lower part of the filter unit 5 to drive the lower part, thereby ensuring that the overall structure of the filter unit 5 is driven and that it can move as a whole, so as to achieve the effect of adjusting the gap between adjacent filter units 5 according to the temperature.

[0088] In some implementations...

[0089] The motion mechanism 16 is also equipped with a temperature sensor 19, which can detect the temperature inside the protective net 2.

[0090] This invention utilizes a temperature sensor mounted on the motion mechanism to effectively monitor the temperature inside the protective mesh. This allows for adjustment of the gap between adjacent filter units based on the temperature levels and changes within the mesh, thereby ensuring both protection and dustproofing while also improving the heat dissipation performance of the components and enhancing electrical safety.

[0091] In some implementations...

[0092] It also includes a magnetic structure 4 and a fixed sheet metal. The magnetic structure 4 is disposed on the protective net 2, and the protective net 2 can be magnetically connected to the fixed sheet metal through the magnetic structure 4.

[0093] This is a preferred structural form of the protective net assembly of this utility model. Furthermore, by setting a magnetic attraction structure 4 and a fixed sheet metal, the upper or lower end of the protective net 2 is installed onto the upper and lower fixed sheet metal by magnetic attraction through the magnetic attraction structure 4, thus completing the installation between the protective net 2 and the inverter housing 1. This installation method eliminates the existing installation methods such as threaded installation, and can realize the quick installation and disassembly of the protective net 2, improving the efficiency of the installation and disassembly of the protective net 2.

[0094] In some implementations...

[0095] The magnetic attraction structure 4 includes an upper magnetic attraction block 41 and a lower magnetic attraction block 42. The upper magnetic attraction block 41 is disposed at the upper end of the protective net 2, and the lower magnetic attraction block 42 is disposed at the lower end of the protective net 2. The fixing sheet metal includes an upper fixing sheet metal 14 and a lower fixing sheet metal 15. The upper end of the protective net 2 can be fixed to the upper fixing sheet metal 14 by the upper magnetic attraction block 41, and the lower end of the protective net 2 can be fixed to the lower fixing sheet metal 15 by the lower magnetic attraction block 42.

[0096] This is a preferred structural form of the magnetic attraction structure 4 of this utility model. The upper magnetic attraction block 41 can connect the upper end of the protective net 2 to the upper fixed sheet metal 14, and the lower magnetic attraction block 42 can connect the lower end of the protective net 2 to the lower fixed sheet metal 15, thereby achieving the effect and purpose of connecting the entire structure of the protective net to the inverter housing 1.

[0097] This utility model also provides a frequency converter, which includes the aforementioned protective net assembly and a frequency converter housing 1. The frequency converter housing 1 has a vent 8, and the protective net assembly is disposed at the vent 8.

[0098] The filter unit of this inverter is movable and its gap can be adaptively adjusted according to the internal temperature to enhance or reduce heat dissipation, ensuring electrical safety while improving protection and dust prevention. This invention employs a parallel sheet metal structure combined with a ring-lock structure 3, fully utilizing the internal space of the inverter to effectively install the protective net 2, saving installation space. The parallel structure allows for adjustment of the length of the protective net 2 as needed, offering strong applicability. The ring-lock structure 3 allows for folding and placement of the sheet metal, improving the utilization rate of the inverter's internal space. A magnetic structure 4 fixes the sheet metal parts in the appropriate positions, facilitating quick and easy assembly and disassembly. The through-hole structure also assists in heat dissipation. The inverter's heat dissipation consists of three layers: main flow channel heat dissipation, auxiliary airflow heat dissipation, and natural heat dissipation. Auxiliary airflow heat dissipation connects the internal flow channels of the inverter, and the through-holes in the protective net connect ventilation channels while preventing dust, greatly improving the inverter's heat dissipation efficiency.

[0099] In some implementations...

[0100] The inverter housing 1 includes an inverter top cover 10 and an inverter bottom plate 9. When the protective net assembly includes an upper fixed sheet metal 14 and a lower fixed sheet metal 15, the upper fixed sheet metal 14 is fixed to the inverter top cover 10, and the lower fixed sheet metal 15 is fixed to the inverter bottom plate 9.

[0101] The inverter includes an upper end cover reinforcing rib 11 and an assembly reinforcing rib 12. Both the upper end cover reinforcing rib 11 and the assembly reinforcing rib 12 are installed on the inverter upper cover 10. The upper fixed sheet metal 14 is fixed to the inverter upper cover 10 through the assembly reinforcing rib 12.

[0102] This is the preferred structural form of the inverter of this utility model. By fixing the upper fixed sheet metal 14 to the inverter upper cover 10 and the lower fixed sheet metal 15 to the inverter base plate 9, the effect of fixing the upper and lower ends of the protective net to the inverter housing 1 can be effectively achieved. The upper cover reinforcing rib 11 is used to reinforce the inverter upper cover 10, and the mounting reinforcing rib 12 is used to connect the upper fixed sheet metal 14 and connect it to the inverter upper cover 10 to achieve the fixed connection of the protective net 2.

[0103] See Figure 2 and Figure 6 The upper cover reinforcing rib 11 and the assembly reinforcing rib 12 are welded to the inverter upper cover 10. The upper fixed sheet metal 14 can be connected to the assembly reinforcing rib 12 by bolts or welding, depending on the strength requirements and the design for flexibility.

[0104] The upper fixed sheet metal 14 can be adjusted left and right on the mounting reinforcing rib 12 to accommodate the installation of other components of the frequency converter. The lower fixed sheet metal 15 is fixed inside the frequency converter housing 1 and is parallel and of the same length as the upper fixed sheet metal 14.

[0105] In some implementations...

[0106] The inverter housing 1 also includes two opposing side plates. When the protective net assembly also includes an upper motion mechanism 17 and a lower motion mechanism 18, one end of the upper motion mechanism 17 is fixed to one side plate of the inverter housing 1, and the other end of the upper motion mechanism 17 is fixed to the other side plate of the inverter housing 1; one end of the lower motion mechanism 18 is fixed to one side plate of the inverter housing 1, and the other end of the lower motion mechanism 18 is fixed to the other side plate of the inverter housing 1.

[0107] This is the preferred structural form of the inverter of this utility model. By fixing the upper motion mechanism 17 and the lower motion mechanism 18 of the protective net assembly to two opposite side plates, the upper and lower motion mechanisms are effectively fixedly connected. This facilitates the movement of the filter unit 5 by the movement of the moving parts 20 on the upper and lower motion mechanisms. This allows for the adaptive adjustment of the gap between adjacent filter units 5 according to temperature changes, ensuring protection and dust prevention while improving the heat dissipation performance of the components and enhancing electrical safety performance.

[0108] This utility model provides a parallel split-type protective mesh inverter assembly, including a single protective mesh 2, a ring-type structure 3 (preferably connecting metal rings), a magnetic structure 4 (preferably a magnet block), a filter unit 5 (preferably including a fine mesh), and connecting holes 6. The individual filter units 5 are connected to the ring-type structure 3 via the connecting holes 6. The magnetic structure 4 is installed at the upper and lower ends of the protective mesh, and the magnetic structure 4, combined with the upper fixing sheet metal 14 and the lower fixing sheet metal 15, can attract and fix the protective mesh 2. The upper fixing sheet metal 14 is connected to the mounting reinforcing rib 12, and is fixed by welding to ensure strength. The upper end cover reinforcing rib 11 and the mounting reinforcing rib 12 are connected together to the inverter upper cover 10, providing sufficient support strength to the inverter upper cover 10 and ensuring the stability of the inverter housing 1.

[0109] This utility model designs a detachable structure to allow the protective net to be installed on the frequency converter. It achieves compatible installation and convenient disassembly. It allows for fine-tuning, foldable storage, and space saving. It separates strong and weak current circuits into two layers, ensuring electrical safety. It also provides auxiliary heat dissipation, improving heat dissipation efficiency.

[0110] This utility model can have the following beneficial effects:

[0111] 1. The size of the gap between the filter units can be adjusted according to the temperature inside the protective mesh, ensuring protection and dust prevention while improving the heat dissipation performance of the components and enhancing electrical safety.

[0112] 2. The spacing of the protective netting is adjustable and foldable, saving space; it greatly reduces the size of the frequency converter and improves space utilization.

[0113] 3. The assembly of the filter unit and the installation of the protective net are achieved through the use of ring-locking structure and magnetic structure, eliminating complex processes and bolts and improving the ease of installation.

[0114] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A protective screen assembly, characterised in that: include: The protective net (2) includes at least two filter units (5), which are spliced ​​together to form an integral protective net structure. There is a gap (7) between two adjacent filter units (5). The filter units (5) are movable so that the size of the gap (7) can be adjusted according to the temperature inside the protective net (2). When the temperature rises, the filter unit (5) can move to increase the size of the gap (7) between two adjacent filter units (5), that is, the flow cross-sectional area of ​​the gap (7) increases; when the temperature drops, the filter unit (5) can move to decrease the size of the gap (7) between two adjacent filter units (5), that is, the flow cross-sectional area of ​​the gap (7) decreases.

2. The protective net assembly according to claim 1, characterized in that: The filter unit (5) is a sheet structure with filter holes. The filter unit (5) is provided with connection holes (6). The protective net also includes a ring buckle structure (3). The ring buckle structure (3) connects the connection holes (6) of adjacent filter units (5) to connect adjacent filter units (5) into one unit. When the ring buckle structure (3) is inserted into the connection hole (6), the ring buckle structure (3) and the connection hole (6) form a gap fit so that the gap (7) between the two adjacent filter units (5) can be adjusted by the relative movement between the two adjacent filter units (5).

3. The protective net assembly according to claim 2, characterized in that: The ring structure (3) is a circular ring structure with a circular cross-section at any position and a diameter of d. The connecting hole (6) is a circular hole with a diameter of D and d < D. Or, two adjacent filter units (5) can be bent at the ring structure (3) to form a fold, and multiple filter units (5) can be folded in sequence to form an overall stack.

4. The protective net assembly according to claim 1, characterized in that: It also includes a motion mechanism (16) that can drive at least one of the filter units (5) to move to increase or decrease the gap between two adjacent filter units (5).

5. The protective net assembly according to claim 4, characterized in that: The motion mechanism (16) includes a moving part (20) and a guide rail (22). The moving part (20) is disposed on the guide rail (22) so that it can reciprocate along the guide rail (22). The moving part (20) can move to the filter unit (5) where the gap needs to be adjusted. The moving part (20) can also be connected to the filter unit (5) opposite to it and drive the filter unit (5) to move through the movement of the moving part (20) to increase or decrease the gap between two adjacent filter units (5).

6. The protective net assembly according to claim 5, characterized in that: The moving part (20) is a magnetic moving block, which can also generate magnetic force when energized to magnetically attract the filter unit (5) opposite it and drive the filter unit (5) to move through the movement of the moving part (20); the moving mechanism (16) also includes a motor (21), the guide rail (22) is a screw structure, the screw structure has an external thread, the magnetic moving block has a hollow cavity and the inner peripheral wall of the hollow cavity is an internal thread, the moving part (20) is sleeved on the external thread of the guide rail (22) so that the internal thread of the moving part (20) and the external thread of the guide rail (22) form a threaded engagement, the motor (21) is set at one end of the guide rail (22) so as to drive the guide rail (22) to rotate, and the rotation of the guide rail (22) can drive the moving part (20) to move linearly along the direction of the guide rail (22).

7. The protective net assembly according to claim 5, characterized in that: The motion mechanism (16) includes an upper motion mechanism (17) and a lower motion mechanism (18). The upper motion mechanism (17) is opposite to the upper part of the protective net (2) so that the upper part of the filter unit (5) can be driven by the moving part (20) on the upper motion mechanism (17). The lower motion mechanism (18) is opposite to the lower part of the protective net (2) so that the lower end of the filter unit (5) can be driven by the moving part (20) on the lower motion mechanism (18).

8. The protective net assembly according to claim 4, characterized in that: A temperature sensor (19) is also provided on the motion mechanism (16), which can detect the temperature inside the protective net (2).

9. The protective net assembly according to claim 1, characterized in that: It also includes a magnetic structure (4) and a fixed sheet metal. The magnetic structure (4) is disposed on the protective net (2) and the protective net (2) can be magnetically connected to the fixed sheet metal through the magnetic structure (4).

10. The protective net assembly according to claim 9, characterized in that: The magnetic structure (4) includes an upper magnetic block (41) and a lower magnetic block (42). The upper magnetic block (41) is disposed at the upper end of the protective net (2), and the lower magnetic block (42) is disposed at the lower end of the protective net (2). The fixing sheet metal includes an upper fixing sheet metal (14) and a lower fixing sheet metal (15). The upper end of the protective net (2) can be fixed to the upper fixing sheet metal (14) by the upper magnetic block (41), and the lower end of the protective net (2) can be fixed to the lower fixing sheet metal (15) by the lower magnetic block (42).

11. A frequency converter, characterized in that: The protective net assembly according to any one of claims 1-10 further includes a frequency converter housing (1) having a vent (8), and the protective net assembly is disposed at the vent (8).

12. The frequency converter according to claim 11, characterized in that: The inverter housing (1) includes an inverter top cover (10) and an inverter bottom plate (9). When the protective net assembly includes an upper fixed sheet metal (14) and a lower fixed sheet metal (15), the upper fixed sheet metal (14) is fixed to the inverter top cover (10), and the lower fixed sheet metal (15) is fixed to the inverter bottom plate (9). The inverter includes an upper cover reinforcing rib (11) and an assembly reinforcing rib (12). The upper cover reinforcing rib (11) and the assembly reinforcing rib (12) are both installed on the inverter upper cover (10). The upper fixed sheet metal (14) is fixed to the inverter upper cover (10) through the assembly reinforcing rib (12).

13. The frequency converter according to claim 11, characterized in that: The inverter housing (1) also includes two opposing side plates. When the protective net assembly also includes an upper motion mechanism (17) and a lower motion mechanism (18), one end of the upper motion mechanism (17) is fixed to one side plate of the inverter housing (1), and the other end of the upper motion mechanism (17) is fixed to the other side plate of the inverter housing (1); one end of the lower motion mechanism (18) is fixed to one side plate of the inverter housing (1), and the other end of the lower motion mechanism (18) is fixed to the other side plate of the inverter housing (1).

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