Frequency converter anti-interference device

Abstract

The utility model discloses a frequency converter anti-interference device, and relates to the technical field of frequency converters. The device comprises a box body, a box door is hinged to one side of the box body through hinges, a bottom plate is fixedly connected to the interior of the box body, sliding rails are symmetrically and fixedly connected to one side of the interior of the box body and the top of the bottom plate, electromagnetic shielding plates are slidably arranged in the sliding rails, limiting assemblies are installed on one sides of the sliding rails, and a plurality of ventilation holes are formed in the bottom plate in a penetrating mode. The frequency converter is provided with the electromagnetic shielding plate, the electromagnetic shielding cover and the anti-interference shielding box, and various interference sources such as electromagnetic interference and signal interference in the surrounding environment can be effectively shielded through the electromagnetic shielding plate, the electromagnetic shielding cover and the anti-interference shielding box, so that the influence of external interference on the frequency converter is reduced or eliminated; the frequency converter can be ensured to work stably in a complex environment, misoperation or shutdown caused by interference is avoided, and therefore the stability and reliability of the whole system are improved.

Description

Technical Field

[0001] The present application relates to the technical field of frequency converters, and in particular to an anti-interference device for a frequency converter. Background Art

[0002] A frequency converter is a power control device that controls an AC motor by changing the frequency of the motor's operating power supply. It uses frequency conversion technology and microelectronics technology to achieve functions such as energy saving and speed regulation, and has multiple protection functions.

[0003] An inverter described in an existing Chinese patent publication (authorization publication number: CN220273508U) includes an inverter body, a heat dissipation mechanism connected to the lower end of the inverter body, and heat dissipation holes at the bottom of the inverter body. The heat dissipation mechanism includes a housing, a cooling fan disposed at the upper portion of the housing, and a heat dissipation channel disposed within the housing. The cooling fan is secured to the heat dissipation channel by screws, with the upper end of the cooling fan abutting the heat dissipation holes and the lower end of the cooling fan extending into the heat dissipation channel. Multiple alternating, downwardly inclined baffles are connected to the side walls of the heat dissipation channel, with the lower end of the upper baffle located above the lower baffle. This inverter achieves both heat dissipation and dust prevention.

[0004] In the above patent, while achieving heat dissipation, it can also prevent dust from entering. In daily use, the inverter is a key component of the power transmission system, and its stable operation is crucial to the system. However, there are often multiple interference sources in the on-site environment of the inverter, such as electromagnetic interference, signal interference, etc. These interference sources can cause the inverter to operate unstably or even malfunction frequently. For this reason, the present application provides an inverter anti-interference device. Utility Model Content

[0005] The purpose of this application is to solve the problem that there are often multiple interference sources in the on-site environment of the inverter, such as electromagnetic interference, signal interference, etc. These interference sources will cause the inverter to operate unstable or even frequently fail. This application provides an inverter anti-interference device.

[0006] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:

[0007] The inverter anti-interference device includes a box body, a box door is hinged on a hinge on one side of the box body, a base plate is fixedly connected to the inside of the box body, a slide rail is symmetrically fixedly connected to one side of the inside of the box body and the top of the base plate, an electromagnetic shielding plate is slidably arranged inside the slide rail, a limiting component is installed on one side of the slide rail, a plurality of ventilation holes are opened through the base plate, heat dissipation grooves are opened on both sides of the box body, a dustproof net is installed in the heat dissipation groove, and a snap-on component is installed on both sides of the box body.

[0008] By adopting the above technical solution, the electromagnetic shielding plate can effectively shield various interference sources such as electromagnetic interference and signal interference in the surrounding environment, so as to reduce or eliminate the impact of external interference on the inverter. Secondly, if the electromagnetic shielding plate needs to be replaced and repaired, the limit assembly can be manually operated to quickly pull the electromagnetic shielding plate out from the inside of the slide rail for replacement and repair. After the new electromagnetic shielding plate is inserted into the inside of the slide rail, the limit assembly can continue to be used to limit and fix the electromagnetic shielding plate inside the slide rail to prevent the electromagnetic shielding plate from loosening and falling off. In addition, the dustproof net set on the heat dissipation groove can effectively prevent external dust from entering the interior of the box. When the dustproof net is clogged with dust, the clamping components on both sides can be pulled to release the limit fixation of the dustproof net, so that the dustproof net can be replaced and cleaned, which greatly improves the practicality and convenience of the device.

[0009] Furthermore, the limit assembly includes a fixed block fixedly connected to one side of the slide rail, a through hole is provided on the top of the fixed block, a limit block is slidably connected inside the through hole, a C-shaped block is slidably connected inside the fixed block, a guide rod is fixedly connected to the top of the C-shaped block, a guide groove is provided through the limit block, the shape and size of the guide groove are consistent with the guide rod, the slide rail and the electromagnetic shielding plate are both provided with a limit groove, the shape and size of the limit groove are consistent with one end of the C-shaped block.

[0010] By adopting the above technical solution, the limit block is pressed to disengage from the through hole, thereby pulling the C-shaped block to extract the fixed block, so that one end of the C-shaped block is pulled out from the limit groove in the slide rail and the electromagnetic shielding plate. The electromagnetic shielding plate can be quickly pulled out from the inside of the slide rail for replacement and maintenance, making the maintenance operation time-saving and labor-saving.

[0011] Furthermore, a spring 1 is sleeved on the guide rod, one end of the spring 1 is fixedly connected to the top of the C-shaped block, and the other end of the spring 1 is fixedly connected to the bottom of the limit block.

[0012] By adopting the above technical solution, the limiting block can be always pushed to be located in the through hole by spring 1.

[0013] Furthermore, sliding grooves are provided on both sides of the interior of the fixed block, and sliding blocks are symmetrically fixedly connected to both sides of the C-shaped block, and the sliding blocks are slidably connected in the sliding grooves.

[0014] By adopting the above technical solution, the C-shaped block is pulled outward and moves toward the outside of the fixed block according to the guidance of the slider and the sliding groove.

[0015] Furthermore, an electromagnetic shielding cover is fixedly connected to the interior of the box, and an anti-interference shielding box is fixedly connected to the bottom of the bottom plate.

[0016] By adopting the above technical solution, the electromagnetic shielding cover and anti-interference shielding box can effectively shield various interference sources such as electromagnetic interference and signal interference in the surrounding environment, thereby reducing or eliminating the impact of external interference on the inverter.

[0017] Furthermore, a plurality of cooling fans are fixedly connected inside the box.

[0018] By adopting the above technical solution, the heat dissipation fan is turned on to discharge the heat to the outside through the ventilation holes and the heat dissipation slots.

[0019] Furthermore, the snap-on assembly includes two grooves symmetrically opened on both sides of the box body, the interior of the two grooves are slidably connected to an adjustment plate, the interior of the two grooves are fixedly connected to a spring 2, one end of the spring 2 is fixedly connected to one side of the adjustment plate, and the other side of the adjustment plate is fixedly connected to a card block, the card block passes through both sides of the heat dissipation slot, and both sides of the dustproof net are provided with a card slot, and the shape and size of the card slot are consistent with one end of the card block.

[0020] By adopting the above technical solution, when the adjustment plate moves, it will drive the card block to be pulled out from the card slot. At this time, the card slot will lose the card limit of the card block, and the dustproof net can be quickly pulled out for cleaning.

[0021] Furthermore, guide grooves are provided on both upper and lower sides of the groove, and guide blocks are fixedly connected to both upper and lower ends of the adjustment plate, and the guide blocks are slidably connected in the guide grooves.

[0022] By adopting the above technical solution, the moving direction of the adjustment plate can be guided by the guide groove and the guide block.

[0023] In summary, this application has at least one of the following beneficial effects:

[0024] 1. This application is provided with an electromagnetic shielding plate, an electromagnetic shielding cover and an anti-interference shielding box. The electromagnetic shielding plate, the electromagnetic shielding cover and the anti-interference shielding box can effectively shield various interference sources such as electromagnetic interference and signal interference in the surrounding environment, thereby reducing or eliminating the impact of external interference on the inverter, ensuring that the inverter can work stably in a complex environment, avoiding malfunction or shutdown due to interference, and thus improving the stability and reliability of the entire system.

[0025] 2. This application provides a limiting assembly. If the electromagnetic shielding plate needs to be replaced or repaired, the limiting block can be pressed to disengage the through hole, thereby pulling the C-shaped block out of the fixed block, so that one end of the C-shaped block is pulled out from the limiting groove in the slide rail and the electromagnetic shielding plate. The electromagnetic shielding plate can then be quickly pulled out from the inside of the slide rail for replacement and repair, making the repair operation time-saving and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the device body in this application.

[0027] Figure 2 It is a schematic diagram of the internal structure of the device body in this application.

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of the limiting component in this application.

[0029] Figure 4 It is a schematic diagram of the three-dimensional structure of the clamping assembly in this application.

[0030] Description of reference numerals:

[0031] 1. Box body; 2. Box door; 3. Bottom plate; 4. Slide rail; 5. Electromagnetic shielding plate; 6. Electromagnetic shielding cover; 7. Limiting assembly; 8. Anti-interference shielding box; 9. Ventilation hole; 10. Cooling fan; 11. Dust screen; 12. Clamping assembly; 71. Fixed block; 72. Limiting block; 73. C-shaped block; 74. Guide rod; 75. Spring 1; 76. Guide groove; 77. Slider; 78. Limiting groove; 111. Clamping slot; 121. Groove; 122. Adjusting plate; 123. Spring 2; 124. Clamping block; 125. Guide groove; 126. Guide block. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] The embodiments of the present application disclose an anti-interference device for a frequency converter.

[0034] Reference Figure 1 and Figure 2 The inverter anti-interference device includes a box body 1, a box door 2 is hinged on one side of the box body 1, a bottom plate 3 is fixedly connected to the inside of the box body 1, a slide rail 4 is symmetrically fixedly connected to the top of the bottom plate 3 on one side of the inside of the box body 1, an electromagnetic shielding plate 5 is slidingly arranged inside the slide rail 4, a limit assembly 7 is installed on one side of the slide rail 4, a plurality of ventilation holes 9 are opened through the bottom plate 3, heat dissipation grooves are opened on both sides of the box body 1, a dustproof net 11 is installed in the heat dissipation groove, a snap-on assembly 12 is installed on both sides of the box body 1, an electromagnetic shielding cover 6 is fixedly connected to the inside of the box body 1, an anti-interference shielding box 8 is fixedly connected to the bottom of the bottom plate 3, and a plurality of cooling fans 10 are fixedly connected to the inside of the box body 1.

[0035] During use, first install the various electrical components in the inverter inside the box 1, and then install the electromagnetic shielding plate 5 inside the slide rail 4. The electromagnetic shielding plate 5, electromagnetic shielding cover 6 and anti-interference shielding box 8 can effectively shield various interference sources such as electromagnetic interference and signal interference in the surrounding environment, so as to reduce or eliminate the influence of external interference on the inverter, and ensure that the inverter can work stably in a complex environment, avoid malfunction or shutdown caused by interference, thereby improving the stability and reliability of the entire system. Secondly, if the electromagnetic shielding plate 5 needs to be replaced and repaired, the limit assembly 7 can be manually operated to pull the limit assembly 7 out and separate it from the slide rail 4 and the electromagnetic shielding plate 5, so as to release the limit fixation of the electromagnetic shielding plate 5. At this time, the electromagnetic shielding plate 5 can be replaced. It can be quickly pulled out from the inside of the slide rail 4 for replacement and maintenance. After the new electromagnetic shielding plate 5 is inserted into the inside of the slide rail 4, the limiting component 7 can continue to be used to limit and fix the electromagnetic shielding plate 5 inside the slide rail 4 to prevent the electromagnetic shielding plate 5 from loosening and falling off. In addition, during the use of the inverter, the operation of the electrical components will generate a lot of heat. At this time, the cooling fan 10 can be turned on to discharge the heat to the outside through the ventilation holes 9 and the heat dissipation groove. The dustproof net 11 set on the heat dissipation groove can effectively prevent external dust from entering the interior of the box 1. When the dustproof net 11 is clogged by a lot of dust, the clamping components 12 on both sides can be pulled to release the limit fixation of the dustproof net 11, so that the dustproof net 11 can be replaced and cleaned, which greatly improves the practicality and convenience of the device.

[0036] Reference Figure 2 and Figure 3 The limit assembly 7 includes a fixed block 71 fixedly connected to one side of the slide rail 4. A through hole is provided on the top of the fixed block 71, and a limit block 72 is slidably connected inside the through hole. A C-shaped block 73 is slidably connected inside the fixed block 71. The top of the C-shaped block 73 is fixedly connected to a guide rod 74. A guide groove 76 is formed through the limit block 72. The shape and size of the guide groove 76 are consistent with the guide rod 74. The slide rail 4 and the electromagnetic shielding plate 5 are both formed with a limit groove 78. The shape and size of the limit groove 78 are consistent with one end of the C-shaped block 73. A spring 75 is sleeved on the guide rod 74. One end of the spring 75 is fixedly connected to the top of the C-shaped block 73, and the other end of the spring 75 is fixedly connected to the bottom of the limit block 72. Slide grooves are provided on both sides of the interior of the fixed block 71. Slide blocks 77 are symmetrically fixedly connected on both sides of the C-shaped block 73, and the slide blocks 77 are slidably connected in the slide grooves.

[0037] When the locking cam 73 is in the unlocked position, the locking cam 73 is in the unlocked position, and the locking cam 73 is in the unlocked position, so that the locking cam 73 is unlocked and the locking cam 73 is unlocked. The C-shaped block 73 is pulled out of the fixed block 71, and one end of the C-shaped block 73 is pulled out from the limiting groove 78 in the slide rail 4 and the electromagnetic shielding plate 5. At this time, after the electromagnetic shielding plate 5 loses the limitation of the C-shaped block 73, the electromagnetic shielding plate 5 can be quickly pulled out from the inside of the slide rail 4 for replacement and maintenance, making the maintenance operation time-saving and labor-saving. Secondly, when the electromagnetic shielding plate 5 is replaced, it can be reinserted into the inside of the slide rail 4, and then the C-shaped block 73 is taken out and inserted into the limiting groove 78 to limit and fix the electromagnetic shielding plate 5 inside the slide rail 4 to prevent the electromagnetic shielding plate 5 from loosening and falling off.

[0038] Reference Figure 2 and Figure 3 The clamping assembly 12 includes two grooves 121 symmetrically opened on both sides of the box body 1, and the interior of the two grooves 121 is slidably connected to an adjusting plate 122, and the interior of the two grooves 121 is fixedly connected to a spring 2 123, one end of the spring 2 123 is fixedly connected to one side of the adjusting plate 122, and the other side of the adjusting plate 122 is fixedly connected to a card block 124, and the card block 124 passes through both sides of the heat dissipation groove. Card slots 111 are opened on both sides of the dustproof net 11, and the shape and size of the card slot 111 are consistent with one end of the card block 124. Guide grooves 125 are opened on the upper and lower sides of the groove 121, and the upper and lower ends of the adjusting plate 122 are fixedly connected to guide blocks 126, which are slidably connected in the guide grooves 125.

[0039] When in use, first pull the adjustment plates 122 on both sides to move in the groove 121. The moving direction of the adjustment plate 122 can be guided by the guide groove 125 and the guide block 126. When the adjustment plate 122 moves, it will squeeze the spring 2 123 on one side to contract and drive the block 124 to be pulled out of the slot 111. At this time, the slot 111 will lose the card limit of the card block 124, and the dustproof net 11 can be quickly pulled out for cleaning. Then, the cleaned dustproof net 11 is put back into the heat dissipation slot. At this time, loosen the adjustment plates 122 on both sides, and according to the rebound of the spring 2 123, the adjustment plate 122 will be pushed to drive the card block 124 to be reinserted into the slot 111, so as to card and limit the position of the slot 111, so that the dustproof net 11 can be stabilized in the heat dissipation slot.

[0040] The implementation principle of the inverter anti-interference device of this embodiment is as follows: first, the various electrical components in the inverter are installed inside the box 1, and then the electromagnetic shielding plate 5 is installed inside the slide rail 4. The electromagnetic shielding plate 5, the electromagnetic shielding cover 6 and the anti-interference shielding box 8 can effectively shield various interference sources such as electromagnetic interference and signal interference in the surrounding environment, thereby reducing or eliminating the impact of external interference on the inverter, ensuring that the inverter can operate stably in complex environments, avoiding malfunctions or shutdowns caused by interference, and thus improving the stability and reliability of the entire system.

[0041] When the electromagnetic shielding plate 5 needs to be replaced and repaired, the limit block 72 can be manually pressed to move the limit block 72 downward along the through hole. When the limit block 72 moves, the guide rod 74 will enter the guide groove 76. The guide rod 74 can guide the movement direction of the limit block 72. At this time, the bottom of the limit block 72 will squeeze the spring 1 75 to shrink. When the limit block 72 is completely out of the through hole, the C-shaped block 73 can be pulled outward and moved to the outside of the fixed block 71 according to the guidance of the slider 77 and the slide groove. At this time, since the limit between the limit block 72 and the through hole has been The C-shaped block 73 is directly pulled out of the fixed block 71, and one end of the C-shaped block 73 is pulled out from the limiting groove 78 in the slide rail 4 and the electromagnetic shielding plate 5. At this time, after the electromagnetic shielding plate 5 loses the limit of the C-shaped block 73, the electromagnetic shielding plate 5 can be quickly pulled out from the inside of the slide rail 4 for replacement and maintenance, making the maintenance operation time-saving and labor-saving. Secondly, when the electromagnetic shielding plate 5 is replaced, it can be reinserted into the inside of the slide rail 4, and then the C-shaped block 73 is taken out and inserted into the limiting groove 78 to limit and fix the electromagnetic shielding plate 5 inside the slide rail 4 to prevent the electromagnetic shielding plate 5 from loosening and falling off.

[0042] In addition, during the use of the inverter, the operation of the electrical components will generate a lot of heat. At this time, the cooling fan 10 can be turned on to discharge the heat to the outside through the ventilation holes 9 and the heat dissipation slots. The dustproof net 11 provided on the heat dissipation slot can effectively prevent external dust from entering the interior of the box body 1. When the dustproof net 11 is clogged with a lot of dust, the adjustment plates 122 on both sides can be pulled to move in the groove 121. The guide groove 125 and the guide block 126 can guide the moving direction of the adjustment plate 122. When the adjustment plate 122 moves, it will squeeze the spring two on one side. 123 contracts and drives the card block 124 to be pulled out from the card slot 111. At this time, the card slot 111 will lose the card limit of the card block 124, and the dustproof net 11 can be quickly pulled out for cleaning. Then the cleaned dustproof net 11 is put back into the heat dissipation slot. At this time, the adjustment plates 122 on both sides are loosened. According to the rebound of spring 2 123, the adjustment plates 122 will be pushed to drive the card block 124 to be reinserted into the card slot 111, so as to card and limit the position of the card slot 111, so that the dustproof net 11 can be stably in the heat dissipation slot, which greatly improves the practicality and convenience of the device.

Claims

1. A frequency converter anti-interference device, comprising a housing (1), characterized in that: A door (2) is hingedly connected to one side of the box body (1), a bottom plate (3) is fixedly connected to the inside of the box body (1), a slide rail (4) is symmetrically fixedly connected to one side of the inside of the box body (1) and the top of the bottom plate (3), an electromagnetic shielding plate (5) is slidably provided inside the slide rail (4), a limiting component (7) is installed on one side of the slide rail (4), a plurality of ventilation holes (9) are opened through the bottom plate (3), heat dissipation grooves are opened on both sides of the box body (1), a dustproof net (11) is installed in the heat dissipation groove, and a snap-on component (12) is installed on both sides of the box body (1).

2. The frequency converter anti-interference device according to claim 1, characterized in that: The limiting assembly (7) includes a fixed block (71) fixedly connected to one side of the slide rail (4), a through hole is provided on the top of the fixed block (71), a limiting block (72) is slidably connected inside the through hole, a C-shaped block (73) is slidably connected inside the fixed block (71), a guide rod (74) is fixedly connected to the top of the C-shaped block (73), a guide groove (76) is provided through the limiting block (72), and the shape and size of the guide groove (76) are consistent with those of the guide rod (74), and the limiting groove (78) is provided through the slide rail (4) and the electromagnetic shielding plate (5), and the shape and size of the limiting groove (78) are consistent with those of one end of the C-shaped block (73).

3. The frequency converter anti-interference device according to claim 2, characterized in that: A spring 1 (75) is sleeved on the guide rod (74), one end of the spring 1 (75) is fixedly connected to the top of the C-shaped block (73), and the other end of the spring 1 (75) is fixedly connected to the bottom of the limit block (72).

4. The frequency converter anti-interference device according to claim 2, characterized in that: Slide grooves are provided on both sides of the interior of the fixed block (71), and sliders (77) are symmetrically fixedly connected to both sides of the C-shaped block (73), and the sliders (77) are slidably connected in the slide grooves.

5. The frequency converter anti-interference device according to claim 1, characterized in that: An electromagnetic shielding cover (6) is fixedly connected to the interior of the box body (1), and an anti-interference shielding box (8) is fixedly connected to the bottom of the bottom plate (3).

6. The frequency converter anti-interference device according to claim 1, characterized in that: A plurality of cooling fans (10) are fixedly connected inside the box (1).

7. The frequency converter anti-interference device according to claim 1, characterized in that: The snap-fit assembly (12) includes two grooves (121) symmetrically provided on both sides of the box body (1), the insides of the two grooves (121) are both slidably connected to an adjustment plate (122), the insides of the two grooves (121) are both fixedly connected to a second spring (123), one end of the second spring (123) is fixedly connected to one side of the adjustment plate (122), the other side of the adjustment plate (122) is fixedly connected to a clamping block (124), the clamping block (124) passes through both sides of the heat dissipation slot, and both sides of the dustproof net (11) are provided with a clamping slot (111), the shape and size of the clamping slot (111) are consistent with one end of the clamping block (124).

8. The frequency converter anti-interference device according to claim 7, characterized in that: Guide grooves (125) are provided on both upper and lower sides of the groove (121), and guide blocks (126) are fixedly connected to both upper and lower ends of the adjustment plate (122), and the guide blocks (126) are slidably connected in the guide grooves (125).

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