A fault detection device for an inverter

Abstract

The application relates to the technical field of inverter detection, and discloses a fault detection device for an inverter, which comprises a shielding cabinet, a detection device main body, an inverter main body and a base fixedly installed at the bottom of the shielding cabinet, a cabinet door is hinged to the front side of the shielding cabinet, the inside back side of the shielding cabinet is provided with an adjusting assembly, the inside two sides of the shielding cabinet are provided with air guiding assemblies, the inside front side of the shielding cabinet is fixedly connected with a horizontal plate in the middle, the adjusting assembly comprises a horizontal unit and a vertical unit, the horizontal unit comprises two slide rails arranged above and below, the slide rails are fixedly connected with the inside back side of the shielding cabinet, the front side of the slide rail is slidably connected with two sliding seats, the problem that the detection range and detection effect of the inverter fault detection device are limited due to the electromagnetic shielding box of the prior art when the insulation resistance test is performed in an environment free of electromagnetic interference is solved.

Description

Technical Field

[0001] This invention relates to the field of inverter testing technology, specifically to a fault detection device for inverters. Background Technology

[0002] An inverter is a converter that transforms DC power (batteries, storage batteries) into AC power (typically 220V, 50Hz sine wave) with fixed frequency and voltage or variable frequency and voltage. When an inverter leaves the factory, a fault detection device is used to perform functional tests on the inverter to check whether the inverter can be used normally.

[0003] An inverter fault detection device, such as one disclosed in announcement number CN214585726U, includes an inverter fault detection device body. The front of the inverter fault detection device body has a connection port, and both sides of the body are fixed with stabilizing mechanisms. A display screen is connected to the front of the inverter fault detection device body, and an operation button is also located on the front of the body. Through the stabilizing mechanisms, a compression spring can vertically compress and push a moving plate, at which time the rubber pad at the bottom of the moving plate can abut against the outside of the device's placement position, thereby ensuring the device's stable placement. Through the placement mechanism, the device... The positioning block on top of the mounting pad can be inserted into the main body of the inverter fault detection device, and the elastic force provided by the installation spring ensures that the mounting pad is installed firmly, thus facilitating the fixation of the mounting pad. However, when the inverter fault detection device performs insulation resistance testing, it needs to be carried out in an environment free from electromagnetic interference to reduce the possibility of inaccurate results due to environmental factors. In the existing technology, an electromagnetic shielding box can be used to reduce the influence of electromagnetic interference. However, in the shielding box, the detection range and detection effect of the inverter fault detection device will be limited. Moreover, if the inverter itself shifts position during the testing process, it may also affect the accuracy of the detection results.

[0004] Therefore, a fault detection device for inverters is proposed to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a fault detection device for inverters, in order to solve the problem that the electromagnetic shielding box of the prior art limits the detection range and detection effect of the inverter fault detection device, which is required to conduct insulation resistance testing in an environment free from electromagnetic interference.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fault detection device for an inverter, comprising a shielded cabinet, a detection device body, an inverter body, and a base fixedly installed at the bottom of the shielded cabinet, wherein a cabinet door is hinged to one side of the front of the shielded cabinet;

[0007] Also includes:

[0008] An adjustment component is provided on one side of the back of the shielding cabinet, air guide components are provided on both sides of the inside of the shielding cabinet, and a horizontal plate is fixedly connected to the middle of one side of the front of the shielding cabinet.

[0009] The adjustment assembly includes a horizontal unit and a vertical unit. The horizontal unit includes two slide rails, one upper and one lower. The slide rails are fixedly connected to one side of the back of the shielding cabinet. Two sliding seats are slidably connected to one side of the front of the slide rails. The same vertical rod is fixedly connected between the upper and lower sliding seats. Mounting plates are fixedly connected to the outer sides of the two vertical rods.

[0010] A clamping rod is slidably installed inside the lower sliding seat, and a slot is opened inside the lower slide rail. A baffle and a pull rod are fixedly connected to the end of the clamping rod away from the slide rail, and a spring is fixedly connected between the baffle and the lower sliding seat.

[0011] The longitudinal unit includes a rack fixedly installed at the bottom of the upper slide rail and a rotating shaft rotatably installed at the top of the mounting plate. One end of the rotating shaft is fixedly connected to a gear, and the other end of the rotating shaft is fixedly connected to a rotating rod.

[0012] Preferably, the main body of the detection device is fixedly installed on one side of the front of the mounting plate, the slots are evenly spaced, the clamping rod is engaged with the slot, the clamping rod is fixedly connected to the pull rod through the baffle, the spring is sleeved on the outside of the clamping rod, and the bottom of the horizontal plate is fixedly connected to the limit frame.

[0013] By adopting the above technical solution, the operator pulls the two levers to disengage the clamping rod from the slot, and then pushes the lever horizontally to facilitate the horizontal adjustment of the main body of the testing device. When the operator pulls the main body of the testing device to move it up and down, the cleaning brush on the inside of the telescopic bar will rotate and clean the display screen position of the main body of the testing device.

[0014] Preferably, the pull rod is slidably connected to the limiting frame, a magnetic strip is fixedly connected to the front side of the limiting frame, and the end of the pull rod away from the baffle is magnetically connected to the magnetic strip.

[0015] By adopting the above technical solution, the magnetic strip is used to attract and fix the end of the pull rod, thereby assisting in limiting the position of the pull rod.

[0016] Preferably, there are two racks symmetrically arranged, two vertical plates are symmetrically fixedly installed on the top of the mounting plate, there are two rotating shafts, and the rotating shafts on both sides are rotatably connected to the vertical plates on both sides respectively, and the gear is located on the side of the vertical plate away from the rotating shaft.

[0017] By adopting the above technical solution, the mounting plate drives the rotating shaft and gear to move. The gear meshes with the rack, so that the gear will also rotate during the movement, and the gear will drive the rotating shaft and rotating rod to rotate.

[0018] Preferably, the gear meshes with the rack, a telescopic bar is slidably installed inside the rotating rod, a cleaning brush is fixedly connected to the side of the telescopic bar near the main body of the detection device, and a tightening bolt is threadedly connected to the lower part of the front side of the rotating rod, the tightening bolt abutting against the telescopic bar.

[0019] By adopting the above technical solution, the telescopic bar can slide inside the rotating rod, and after adjustment, the telescopic bar can be limited and fixed by tightening the clamping bolt.

[0020] Preferably, a locking bolt is threaded onto one side of the front of the mounting plate. Two locking bolts are symmetrically arranged, and the locking bolts pass through the mounting plate and abut against the vertical rod.

[0021] By adopting the above technical solution, operators can tighten the locking bolts to facilitate the fixing of the position of the mounting plate and the main body of the detection device.

[0022] Preferably, the air guiding assembly includes a drive motor fixedly installed in the middle of the bottom surface of the shielding cabinet, and there are no fewer than two drive motors. The output end of the drive motor is fixedly connected to a fan blade. Air inlet covers are symmetrically fixedly installed on both sides of the inner wall of the shielding cabinet, and a vertical pipe is fixedly connected to the top of the air inlet cover.

[0023] By adopting the above technical solution, when the temperature inside the shielding cabinet is too high, the operator starts three drive motors to work, and the drive motors drive the fan blades to rotate and blow air.

[0024] Preferably, the vertical pipe is connected to the air inlet hood, and air blowers are evenly fixedly installed on the side of the vertical pipe near the main body of the detection device. The air blowers are arranged at equal intervals, and there are no less than three air blowers. A guide plate is symmetrically fixedly connected to the inner top surface of the shielding cabinet, and a filter window is fixedly installed on the top of the shielding cabinet. A top plate is fixedly connected to the top of the filter window.

[0025] By adopting the above technical solution, part of the air blows vertically upwards onto the main body of the detection device, while the other part of the air enters the air inlet hood, then passes through the vertical pipe and is discharged from the air blower hood. The guide plate plays a guiding role, and the air is finally blown outwards from the filter window.

[0026] Preferably, a connecting plate is symmetrically fixedly installed on the top of the horizontal plate, a lead screw is threadedly connected to the inside of the connecting plate, a positioning plate is rotatably connected to one end of the lead screw, the bottom of the positioning plate is in contact with the horizontal plate, and protective plates are symmetrically fixedly connected to both sides of the positioning plate.

[0027] By adopting the above technical solution, the inverter body is placed on top of the horizontal plate, and then the lead screws on both sides are rotated synchronously. The lead screws drive the positioning plates to move until the positioning plates on both sides clamp the inverter body, and the protective plate fits and limits the front and rear sides of the inverter body.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. By setting up the adjustment components, when the operator adjusts the position of the main body of the detection device, pulling the two levers separates the levers from the magnetic strip. The levers then move the baffle and the clamping rod, stretching the spring on the baffle, causing the clamping rod to disengage from the slot. Pushing the lever horizontally then moves the lever, causing the sliding seat and the vertical rod to move. The vertical rod then moves the mounting plate and the main body of the detection device. After adjustment, releasing the lever causes the spring force to move the baffle and the clamping rod, and the clamping rod re-engages into the corresponding slot, thus completing the horizontal adjustment. By loosening the two locking bolts, the operator can pull the main body of the detection device to move it up and down. The main body of the detection device causes the mounting plate to slide on the vertical rod, and the mounting plate moves the rotating shaft and... The gear moves and meshes with the rack, causing the gear to rotate during the movement. The gear drives the rotating shaft and rotating rod to rotate, which in turn drives the telescopic strip to rotate. The cleaning brush inside the telescopic strip rotates and cleans the display screen of the main body of the detection device. After adjustment, first tighten the locking bolts to fix the position of the mounting plate and the main body of the detection device. Then loosen the abutment bolts, pull the telescopic strip into the rotating rod, and then tighten the abutment bolts again so that the telescopic strip will not block the display screen of the main body of the detection device. This improves the detection range of the main body of the detection device and facilitates the cleaning of the display screen. It solves the problem that the electromagnetic shielding box of the existing technology limits the detection range and detection effect of the inverter fault detection device.

[0030] 2. By setting up an air guide assembly, when the temperature inside the shielded cabinet is too high, the operator starts three drive motors. The bottom of the shielded cabinet is equipped with an air inlet. The drive motor drives the fan blades to rotate and blow air. Part of the air blows vertically upwards onto the main body of the detection device, and another part of the air enters the air inlet hood, then passes through the vertical pipe and is discharged from the air blower hood. The guide plate plays a guiding role. Finally, the air blows outwards from the filter window, so that the air blows on the main body of the detection device in multiple directions, reducing the heat generation of the main body of the detection device and lowering the temperature inside the shielded cabinet.

[0031] 3. The operator places the inverter body on top of the horizontal plate, and then rotates the lead screws on both sides simultaneously. The lead screws drive the positioning plate to move, and the bottom surface of the positioning plate fits against the horizontal plate, so that the positioning plate will not rotate. The positioning plates on both sides move closer to each other until the positioning plates on both sides clamp the inverter body. The movement of the positioning plate will also drive the protective plate to move, so that the protective plate fits and limits the front and rear sides of the inverter body, thereby improving the positioning stability of the inverter body. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the internal structure of the shielding cabinet of the present invention;

[0033] Figure 2 This is a schematic diagram of the first three-dimensional overall structure of the present invention;

[0034] Figure 3 This is a schematic diagram of the second three-dimensional overall structure of the present invention;

[0035] Figure 4 This is a schematic diagram of the horizontal plate structure of the present invention;

[0036] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle;

[0037] Figure 6 For the present invention Figure 4 Enlarged structural diagram at point B;

[0038] Figure 7 This is a schematic cross-sectional view of the shielding cabinet of the present invention;

[0039] Figure 8 This is a schematic cross-sectional view of the slide rail structure of the present invention;

[0040] Figure 9 For the present invention Figure 8 Enlarged structural diagram at point C;

[0041] Figure 10 This is a schematic diagram of the rack structure of the present invention;

[0042] Figure 11 This is a schematic diagram of the vertical tube structure of the present invention;

[0043] Figure 12 For the present invention Figure 11 Enlarged structural diagram at point D;

[0044] Figure 13 This is a schematic diagram of the inverter body clamping of the present invention.

[0045] In the diagram: 1. Shielding cabinet; 2. Base; 3. Cabinet door; 4. Adjustment assembly; 41. Slide rail; 42. Sliding seat; 43. Vertical rod; 44. Mounting plate; 45. Clamping rod; 46. Slot; 47. Baffle plate; 48. Spring; 49. Pull rod; 410. Limit frame; 411. Magnetic strip; 412. Rack; 413. Vertical plate; 414. Rotating shaft; 415. Gear; 416. Rotating rod; 417. Extension 418. Shrink bar; 419. Cleaning brush; 420. Tightening bolt; 421. Locking bolt; 5. Air guide assembly; 51. Drive motor; 52. Fan blades; 53. Air inlet hood; 54. Vertical pipe; 55. Air blower hood; 56. Flow deflector; 57. Filter window; 58. Top plate; 6. Detection device body; 7. Inverter body; 8. Horizontal plate; 9. Connecting plate; 10. Lead screw; 11. Positioning plate; 12. Protective plate. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Please see Figures 1-3 The present invention provides a technical solution: a fault detection device for an inverter, comprising a shielded cabinet 1, a detection device body 6, an inverter body 7, and a base 2 fixedly installed at the bottom of the shielded cabinet 1, wherein a cabinet door 3 is hinged to one side of the front of the shielded cabinet 1.

[0048] An adjustment component 4 is provided on one side of the back of the shielding cabinet 1, and a horizontal plate 8 is fixedly connected to the middle of one side of the front of the shielding cabinet 1.

[0049] The adjustment assembly 4 includes a horizontal unit and a vertical unit. The horizontal unit includes two upper and lower slide rails 41. The slide rails 41 are fixedly connected to one side of the back of the shielding cabinet 1. Two sliding seats 42 are slidably connected to one side of the front of the slide rails 41. The same vertical rod 43 is fixedly connected between the upper and lower sliding seats 42. Mounting plates 44 are fixedly connected to the outside of the two vertical rods 43.

[0050] A retaining rod 45 is slidably installed inside the lower sliding seat 42. A slot 46 is opened inside the lower slide rail 41. A baffle 47 and a pull rod 49 are fixedly connected to the end of the retaining rod 45 away from the slide rail 41. A spring 48 is fixedly connected between the baffle 47 and the lower sliding seat 42.

[0051] The main body 6 of the detection device is fixedly installed on one side of the front of the mounting plate 44. The slots 46 are evenly spaced. The clamping rod 45 is engaged with the slot 46. The clamping rod 45 is fixedly connected to the pull rod 49 through the baffle 47. The spring 48 is sleeved on the outside of the clamping rod 45. The bottom of the horizontal plate 8 is fixedly connected to the limit frame 410.

[0052] The pull rod 49 is slidably connected to the limiting frame 410. A magnetic strip 411 is fixedly connected to the front side of the limiting frame 410. The end of the pull rod 49 away from the baffle 47 is magnetically connected to the magnetic strip 411.

[0053] The longitudinal unit includes a rack 412 fixedly installed at the bottom of the upper slide rail 41 and a rotating shaft 414 rotatably installed at the top of the mounting plate 44. One end of the rotating shaft 414 is fixedly connected to a gear 415, and the other end of the rotating shaft 414 is fixedly connected to a rotating rod 416.

[0054] Two racks 412 are symmetrically arranged, two vertical plates 413 are symmetrically fixedly installed on the top of the mounting plate 44, two rotating shafts 414 are arranged, and the two rotating shafts 414 on both sides are rotatably connected to the two vertical plates 413 respectively. The gear 415 is located on the side of the vertical plate 413 away from the rotating shaft 414.

[0055] Gear 415 meshes with rack 412. Telescopic bar 417 is slidably installed inside rotating rod 416. Cleaning brush 418 is fixedly connected to the side of telescopic bar 417 near the main body 6 of the detection device. A locking bolt 419 is threadedly connected to the lower part of the front side of rotating rod 416. The locking bolt 419 abuts against telescopic bar 417.

[0056] The front side of the mounting plate 44 is threaded with a locking bolt 420. There are two locking bolts 420 symmetrically arranged. The locking bolts 420 pass through the mounting plate 44 and abut against the vertical rod 43.

[0057] Example 1: As Figures 4-10 As shown, when the operator adjusts the position of the main body 6 of the detection device, by pulling the two pull rods 49, the pull rods 49 separate from the magnetic strip 411, and the pull rods 49 drive the baffle 47 and the clamping rod 45 to move. The baffle 47 stretches the spring 48, causing the clamping rod 45 to disengage from the slot 46. Then, the operator pushes the pull rods 49 horizontally, which drives the sliding seat 42 and the vertical rod 43 to move. The vertical rod 43 drives the mounting plate 44 and the main body 6 of the detection device to move.

[0058] After adjustment, the pull rod 49 is released, and the elastic force of the spring 48 drives the baffle 47 and the clamping rod 45 to move. The clamping rod 45 is then locked into the corresponding slot 46, thus completing the horizontal adjustment. By loosening the two locking bolts 420, the operator pulls the detection device body 6 to move it up and down. The detection device body 6 drives the mounting plate 44 to slide on the vertical rod 43.

[0059] Mounting plate 44 drives rotating shaft 414 and gear 415 to move. Gear 415 meshes with rack 412, so that gear 415 will also rotate during the movement. Gear 415 drives rotating shaft 414 and rotating rod 416 to rotate. Rotating rod 416 drives telescopic bar 417 to rotate. The cleaning brush 418 on the inner side of telescopic bar 417 rotates to clean the display screen position of the main body 6 of the detection device.

[0060] After adjustment, first tighten the locking bolt 420 to fix the position of the mounting plate 44 and the main body 6 of the detection device. Then loosen the clamping bolt 419, pull the telescopic bar 417 into the rotating rod 416, and then tighten the clamping bolt 419 so that the telescopic bar 417 will not block the display screen of the main body 6 of the detection device. This improves the detection of the main body 6 of the detection device and facilitates the cleaning of the display screen of the main body 6 of the detection device. It solves the problem that the electromagnetic shielding box of the existing technology will limit the detection range and detection effect of the inverter fault detection device.

[0061] The shielding cabinet 1 has air guide components 5 on both sides inside. The air guide components 5 include a drive motor 51 fixedly installed in the middle of the bottom surface of the shielding cabinet 1. There are no fewer than two drive motors 51. The output end of the drive motor 51 is fixedly connected to a fan blade 52. The inner walls of the shielding cabinet 1 are symmetrically fixedly installed with air inlet covers 53. The top of the air inlet cover 53 is fixedly connected to a vertical pipe 54.

[0062] The vertical pipe 54 is connected to the air inlet hood 53. A blower hood 55 is evenly fixedly installed on the side of the vertical pipe 54 near the main body 6 of the detection device. The blower hoods 55 are set at equal intervals and there are no less than three blower hoods 55. A guide plate 56 is symmetrically fixedly connected to the inner top surface of the shielding cabinet 1. A filter window 57 is fixedly installed on the top of the shielding cabinet 1. A top plate 58 is fixedly connected to the top of the filter window 57.

[0063] A connecting plate 9 is symmetrically fixedly installed on the top of the horizontal plate 8. A screw 10 is threadedly connected inside the connecting plate 9. A positioning plate 11 is rotatably connected to one end of the screw 10. The bottom of the positioning plate 11 is in contact with the horizontal plate 8. Protective plates 12 are symmetrically fixedly connected to both sides of the positioning plate 11.

[0064] Example 2: Figures 11-12 As shown, when the temperature inside the shielding cabinet 1 is too high, the operator starts the three drive motors 51. The bottom surface of the shielding cabinet 1 is equipped with an air inlet. The drive motors 51 drive the fan blades 52 to rotate and blow air. Part of the air blows vertically upwards onto the main body 6 of the detection device, while the other part of the air enters the air inlet hood 53 and then passes through the vertical pipe 54 and is discharged from the blower hood 55. The guide plate 56 guides the air, and the air finally blows outwards from the filter window 57, thereby making the air blow onto the main body 6 of the detection device in multiple directions, reducing the heat generation of the main body 6 of the detection device and lowering the temperature inside the shielding cabinet 1.

[0065] Example 3: Figure 13 As shown, the operator places the inverter body 7 on top of the horizontal plate 8, and then rotates the lead screws 10 on both sides simultaneously. The lead screws 10 drive the positioning plate 11 to move. The bottom surface of the positioning plate 11 is in contact with the horizontal plate 8, so that the positioning plate 11 will not rotate. The positioning plates 11 on both sides move closer to each other until the positioning plates 11 on both sides clamp the inverter body 7. The movement of the positioning plate 11 will also drive the protective plate 12 to move, so that the protective plate 12 fits and limits the front and rear sides of the inverter body 7, thereby improving the positioning stability of the inverter body 7.

[0066] Working principle: When using this device, firstly, as... Figures 1-13 As shown, the operator places the inverter body 7 on top of the horizontal plate 8, and then simultaneously rotates the lead screws 10 on both sides. The positioning plates 11 on both sides clamp the inverter body 7, and the detection device body 6 is connected to the inverter body 7 for testing. When adjusting the position of the detection device body 6, by pulling the two pull rods 49, the clamping rod 45 disengages from the slot 46, and then the pull rods 49 are pushed horizontally. After adjustment, the pull rods 49 are released, and the clamping rod 45 is locked back into the corresponding slot 46, thus completing the horizontal adjustment. By loosening the two locking bolts 420, the operator pulls the detection device body 6 to move it up and down. The detection device body 6 drives the mounting plate 44 to slide on the vertical rod 43, and during the movement, the rotating rod 416 drives the telescopic bar 417 to rotate. The cleaning brush 418 on the inner side of the telescopic bar 417 will also clean the detection device. The display screen of the main body 6 is rotated for cleaning. The locking bolt 420 is tightened to fix the position of the mounting plate 44 and the main body 6 of the detection device. Then, the clamping bolt 419 is loosened, and the telescopic bar 417 is pulled into the rotating rod 416. The clamping bolt 419 is then tightened again so that the telescopic bar 417 will not block the display screen of the main body 6 of the detection device, thereby improving the detection range of the main body 6 of the detection device and facilitating the cleaning of the display screen of the main body 6 of the detection device. When the temperature inside the shielding cabinet 1 is too high, the operator starts the three drive motors 51 to work. The drive motors 51 drive the fan blades 52 to rotate and blow air. Part of the air blows vertically upward to the main body 6 of the detection device, and the other part of the air enters the air inlet hood 53 and is discharged through the vertical pipe 54 and the air blower hood 55, reducing the heat generation of the main body 6 of the detection device and lowering the temperature inside the shielding cabinet 1.

[0067] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0068] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fault detection device for an inverter, comprising a shielded cabinet (1), a detection device body (6), an inverter body (7) and a base (2) fixedly installed at the bottom of the shielded cabinet (1), wherein a cabinet door (3) is hinged to one side of the front of the shielded cabinet (1). Its features are, Also includes: An adjustment component (4) is provided on one side of the back of the shielding cabinet (1), and air guide components (5) are provided on both sides of the inside of the shielding cabinet (1). A horizontal plate (8) is fixedly connected to the middle of one side of the front of the shielding cabinet (1). The adjustment component (4) includes a horizontal unit and a vertical unit. The horizontal unit includes two upper and lower slide rails (41). The slide rails (41) are fixedly connected to one side of the back of the shielding cabinet (1). Two sliding seats (42) are slidably connected to one side of the front of the slide rails (41). The same vertical rod (43) is fixedly connected between the upper and lower sliding seats (42). The mounting plate (44) is fixedly connected to the outside of the two vertical rods (43). A clamping rod (45) is slidably installed inside the lower sliding seat (42), and a slot (46) is opened inside the lower slide rail (41). A baffle (47) and a pull rod (49) are fixedly connected to one end of the clamping rod (45) away from the slide rail (41). A spring (48) is fixedly connected between the baffle (47) and the lower sliding seat (42). The longitudinal unit includes a rack (412) fixedly installed at the bottom of the upper slide rail (41) and a rotating shaft (414) rotatably installed at the top of the mounting plate (44). One end of the rotating shaft (414) is fixedly connected to a gear (415), and the other end of the rotating shaft (414) is fixedly connected to a rotating rod (416).

2. The fault detection device for an inverter according to claim 1, characterized in that: The main body (6) of the detection device is fixedly installed on one side of the front of the mounting plate (44). The slots (46) are evenly spaced. The clamping rod (45) is engaged with the slot (46). The clamping rod (45) is fixedly connected to the pull rod (49) through the baffle (47). The spring (48) is sleeved on the outside of the clamping rod (45). The bottom of the horizontal plate (8) is fixedly connected to the limit frame (410).

3. The fault detection device for an inverter according to claim 2, characterized in that: The pull rod (49) is slidably connected to the limiting frame (410), and a magnetic strip (411) is fixedly connected to the front side of the limiting frame (410). The end of the pull rod (49) away from the baffle (47) is magnetically connected to the magnetic strip (411).

4. A fault detection device for an inverter according to claim 3, characterized in that: Two racks (412) are symmetrically arranged. Two vertical plates (413) are symmetrically fixedly installed on the top of the mounting plate (44). Two rotating shafts (414) are arranged. The rotating shafts (414) on both sides are rotatably connected to the vertical plates (413) on both sides respectively. The gear (415) is located on the side of the vertical plate (413) away from the rotating shaft (414).

5. A fault detection device for an inverter according to claim 4, characterized in that: The gear (415) meshes with the rack (412), and a telescopic strip (417) is slidably installed inside the rotating rod (416). A cleaning brush (418) is fixedly connected to the side of the telescopic strip (417) near the main body (6) of the detection device. A tightening bolt (419) is threadedly connected to the lower part of the front side of the rotating rod (416), and the tightening bolt (419) abuts against the telescopic strip (417).

6. A fault detection device for an inverter according to claim 5, characterized in that: The mounting plate (44) has a locking bolt (420) threaded on one side of its front side. There are two locking bolts (420) symmetrically arranged. The locking bolts (420) pass through the mounting plate (44) and abut against the vertical rod (43).

7. A fault detection device for an inverter according to claim 1, characterized in that: The air guide assembly (5) includes a drive motor (51) fixedly installed in the middle of the bottom surface of the shielding cabinet (1). There are no fewer than two drive motors (51). The output end of the drive motor (51) is fixedly connected to a fan blade (52). Air inlet covers (53) are symmetrically fixedly installed on both sides of the inner wall of the shielding cabinet (1). A vertical pipe (54) is fixedly connected to the top of the air inlet cover (53).

8. A fault detection device for an inverter according to claim 7, characterized in that: The vertical pipe (54) is connected to the air inlet hood (53). A blower hood (55) is evenly fixedly installed on the side of the vertical pipe (54) close to the main body (6) of the detection device. The blower hoods (55) are set at equal intervals. There are no less than three blower hoods (55). A guide plate (56) is symmetrically fixedly connected to the inner top surface of the shielding cabinet (1). A filter window (57) is fixedly installed on the top of the shielding cabinet (1). A top plate (58) is fixedly connected to the top of the filter window (57).

9. A fault detection device for an inverter according to claim 1, characterized in that: A connecting plate (9) is symmetrically fixedly installed on the top of the horizontal plate (8). A screw rod (10) is threadedly connected inside the connecting plate (9). A positioning plate (11) is rotatably connected to one end of the screw rod (10). The bottom of the positioning plate (11) is in contact with the horizontal plate (8). Protective plates (12) are symmetrically fixedly connected to both sides of the positioning plate (11).

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