Frequency converter compensation performance detection device

Abstract

The invention discloses a frequency converter compensation performance detection device, and belongs to the technical field of frequency converter detection devices. Comprising a rack, a rotating tray is rotatably arranged on the rack, and two mounting positions for placing the frequency converter are arranged on the rotating tray; the lifting frame is movably arranged on the rack, and a detection box and a preheating box are fixedly arranged on the heat conduction block; two groups of air outlet covers are arranged; a plurality of air outlets are formed in the air outlet cover, and a plurality of flow deflecting pieces located in the air outlets respectively are rotationally arranged on the air outlet cover. The frequency converter compensation performance detection device has the beneficial effects that through the detection box and the preheating box, when the frequency converter located in the detection box is detected, the frequency converter in the preheating box is preheated, after the frequency converter in the detection box is detected, the frequency converter in the detection box is taken out, and the frequency converter in the detection box is taken out; the motor is started to drive the rotating tray to rotate, so that the preheated frequency converter rotates to the position of the detection box for detection, and the working efficiency is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of frequency converter detection device, in particular to a frequency converter compensation performance detection device. BACKGROUND

[0002] The compensation performance of the frequency converter refers to the ability of the frequency converter to correct various non-ideal factors (such as resistance voltage drop, load disturbance, dead zone effect, etc.) in the operation of the motor through specific technical means, so as to improve the control accuracy, stability and efficiency of the motor. In the test, the input end and the output end of the frequency converter are connected to the comprehensive detector to detect the frequency converter. However, the performance of the existing frequency converter may be different in different temperature environments, so in order to ensure the accuracy of the detection, it is usually necessary to ensure that the frequency converter is in a predetermined temperature environment for detection. During the test, the transformer works at high intensity, which generates a lot of heat. However, high temperature has a great influence on the test results. In the prior art, the heat at the high-voltage frequency converter adjustment module is usually directly brought out by the fan. However, when the transformer is working at high intensity, the temperature is relatively high, and the heat cannot be taken away in time. At the same time, since the performance of the frequency converter needs to be detected at a specified temperature, it is necessary to adjust the frequency converter to the specified temperature before detection, which affects the work efficiency.

[0003] Therefore, there is a need for a frequency converter compensation performance detection device to solve the above problems. SUMMARY

[0004] The summary part of the present application is used to introduce the concept in a simple form, which will be described in detail in the specific embodiment part. The summary part of the present application is not intended to identify the key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0005] To solve the technical problems mentioned in the background section, some embodiments of the present application provide a variable frequency drive compensation performance detection device, comprising: a rack, a rotating tray is rotatably arranged on the rack, and two mounting positions for placing variable frequency drives are arranged on the rotating tray; a lifting frame movably arranged on the rack, a heat conducting block fixedly arranged on the lifting frame, a detection box and a preheating box are arranged on the heat conducting block, and the detection box and the preheating box respectively face the two mounting positions; two groups of air outlet covers are arranged in the detection box and the preheating box; a temperature control fan is fixedly installed on the lifting frame; a plurality of air outlets are arranged on the air outlet cover, and a plurality of deflector plates are rotatably arranged in the air outlets; a lifting cylinder is fixedly arranged on the rack, the piston rod end of the lifting cylinder is fixedly connected with the lifting frame, the lifting frame is driven to move up and down by the extension and retraction of the piston rod end of the lifting cylinder, and the lifting frame has two limit positions, in the first limit position, the lifting frame is located at the uppermost side, and at this time, the detection box and the preheating box are also located at the uppermost side; in the second limit position, the lifting frame is located at the lowermost side, and at this time, the detection box and the preheating box are respectively covered on the two mounting positions, and form a space for accommodating the variable frequency drive with the rotating tray.

[0006] Further, a flow dividing block is fixedly installed on the lifting frame, the air outlet end of the temperature control fan is connected with the flow dividing block, two channels are arranged in the flow dividing block, the two channels are in communication with the air outlet end of the flow dividing block, two air pipes connected with the two channels respectively are connected with the flow dividing block, one end of one air pipe is connected with the air outlet cover in the detection box, the other air pipe is connected with the air outlet cover in the preheating box, a connecting air duct is arranged in the air outlet cover, the connecting air duct is connected with the air pipe, and an impeller is rotatably arranged in the connecting air duct.

[0007] Further, the impeller is coaxially fixedly arranged with a rotating shaft, a driven shaft is rotatably installed on the air outlet cover, the rotating shaft and the driven shaft are in transmission connection, a cam is fixedly arranged on the driven shaft, a sliding bar is slidably arranged on the air outlet cover, the cam abuts against the sliding bar, the sliding bar is fixedly connected with a rack, an axle end rotatably matched with the lifting frame is fixedly arranged on the deflector plate, a gear fixedly connected with the lifting frame is fixedly connected with the axle end, the gear is in mesh with the rack, and a spring is arranged between the sliding bar and the lifting frame.

[0008] Further, a heat conducting block is fixedly arranged in the detection box, the heat conducting block is attached to one side of the variable frequency drive, an expansion piston is fixedly arranged on the heat conducting block, an expansion gas is arranged in the expansion piston, an adjusting partition plate fixedly connected with one end of the piston rod of the expansion piston is arranged in the flow dividing block, and two ventilation openings are arranged on the adjusting partition plate.

[0009] Further, a telescopic end synchronously rotating with the driven shaft is sleeved on one of the driven shafts, a connecting rod fixedly connected with one end of the piston rod of the expansion piston is arranged, a sleeve ring fixedly arranged on one end of the connecting rod is sleeved on the telescopic end and rotatably matched with the telescopic end.

[0010] Further, the lifting frame is fixedly provided with an impeller air pump, an air inlet end of the impeller air pump is connected with a cold air pipe, an air outlet end of the impeller air pump is connected with an air pipe connected to the detection box, an input shaft end of the impeller air pump is provided with a matching end hole, and the telescopic end is inserted into the matching end hole and matched with the matching end hole.

[0011] Further, the lifting frame is fixedly provided with a fire extinguishing agent storage tank, a plurality of fire extinguishing spray pipes are arranged in the detection box, the plurality of fire extinguishing spray pipes are located below the air outlet, a plurality of spray openings are uniformly arranged on the fire extinguishing spray pipes, the fire extinguishing spray pipes are connected with the fire extinguishing agent storage tank through a control valve, and a smoke sensor is arranged in the detection box and electrically connected with the control valve.

[0012] The application has the beneficial effects that: The frequency converter in the detection box is preheated by the preheating box when the frequency converter in the detection box is detected, and the frequency converter in the detection box is taken out after the detection is completed, so that the preheated frequency converter is rotated to the detection box position for detection by starting the motor to drive the rotating disc to rotate, thereby ensuring the work efficiency.

[0013] The sliding bar is slidably connected to the air outlet cover, the rack is fixedly connected to the sliding bar, the shaft end is fixedly connected to the deflector, the shaft end is arranged on the air outlet cover, the gear is fixedly connected to the shaft end, and the gear is engaged with the rack. The rack is driven to move by the reciprocating movement of the sliding bar, and then the gear shaft end is driven to move, so that the deflector is deflected, and then the airflow fully contacts the frequency converter, so that the temperature of the frequency converter is uniform.

[0014] When the smoke sensor detects that smoke is generated in the detection box, the control valve is controlled to communicate the fire extinguishing spray pipe and the fire extinguishing agent storage tank, so that the fire extinguishing foam is sprayed from the spray opening of the fire extinguishing spray pipe for fire extinguishing treatment. At the same time, the fire extinguishing spray pipe is arranged below the air outlet, so that when the control valve sprays, the air outlet blows the foam by airflow deflection, ensures the coverage range of the foam, and improves the fire extinguishing effect. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, objects and advantages of this application become more apparent. The illustrative embodiment drawings of this application and the description thereof are used to explain this application, and do not constitute an improper limitation on this application.

[0016] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic, and the elements and elements are not necessarily drawn according to the proportion.

[0017] In the drawings: Figure 1 is a whole schematic diagram according to an embodiment of the application; Figure 2 yes Figure 1 The installation diagram of the detection box and the preheating box in the embodiment is shown below; Figure 3 yes Figure 1 The installation diagram of the air outlet cover in the embodiment is shown below; Figure 4 yes Figure 1 An enlarged view of the installation of the temperature-controlled fan in the embodiment; Figure 5 yes Figure 1 A cross-sectional view of the air outlet hood in the embodiment; Figure 6 yes Figure 1 The installation diagram of the impeller in the embodiment is shown below; Figure 7 yes Figure 1 A schematic diagram of the installation of the expansion piston in the embodiment; Figure 8 yes Figure 1 A schematic diagram of the structure of the adjustable partition in the embodiment; Figure 9 yes Figure 1 The installation diagram of the telescopic end in the embodiment is shown below; Figure 10 yes Figure 1 The schematic diagram of the impeller air pump in the embodiment is shown.

[0018] 10. Frame; 11. Rotating tray; 12. Detection box; 13. Preheating box; 14. Lifting cylinder; 15. Limiting seat; 16. Temperature control fan; 17. Air duct; 171. First air duct; 172. Second air duct; 18. Sliding strip; 19. Rack; 20. Spring; 21. Guide rod; 22. Air outlet; 23. Connecting air duct; 24. Impeller; 25. Gear; 26. Rotating shaft; 27. Driven shaft; 28. Cam; 29. ​​Heat-conducting block; 30. Expansion piston; 31. Adjusting baffle; 32. Vent; 33. Impeller air pump; 34. Cooling pipe; 35. Telescopic end; 36. Mating end hole; 37. Air outlet hood; 38. Diverter block; 39. Lifting frame; 40. Deflector; 41. Fire extinguishing nozzle; 42. Fire extinguishing agent storage tank; 43. Smoke sensor; 44. Control valve; 45. Connecting rod. Detailed Implementation

[0019] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0020] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0021] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0022] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0023] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] Reference Figures 1-10A frequency converter compensation performance testing device includes: a frame 10, a rotating tray 11, a lifting frame 39, a heat-conducting block 29, a testing box 12, a preheating box 13, an air outlet 37, and a temperature-controlled fan 16. The rotating tray 11 is rotatably mounted on the frame 10. A drive component, which can be a motor, is installed inside the frame 10 to rotate the rotating tray 11. The output shaft of the motor is fixedly connected to the rotating tray 11, driving it to rotate. The rotating tray 11 has two mounting positions for placing the frequency converter. The rotating tray 11 is positioned at each mounting position, and the frequency converter is positioned by a limit bracket 15. A wiring terminal is provided at each mounting position for connecting the frequency converter. A comprehensive detector is installed on the frame 10. After the frequency converter is placed at the mounting position, it is limited by the limit bracket 15 and then electrically connected to the comprehensive detector via the wiring terminal. The comprehensive detector, which can be a frequency converter volt-ampere characteristic comprehensive detector, performs the test. A lifting frame 39 is movably mounted on the frame 10, and a lifting cylinder 14 is fixedly mounted on the frame 10. The piston rod end of the lifting cylinder 14 is fixedly connected to the lifting frame 39, and the lifting frame 39 moves up and down by extending and retracting the piston rod end of the lifting cylinder 14. A detection box 12 and a preheating box 13 are fixedly connected to the lifting frame 39, and the detection box 12 and the preheating box 13 are respectively facing two installation positions. When the lifting frame 39 is at its lowest position, the detection box 12 and the preheating box 13 cover the frequency converters at the two installation positions, with one frequency converter located inside the detection box 12 and the other inside the preheating box 13. A temperature-controlled fan 16 is fixedly mounted on the lifting frame 39, and the outlet of the temperature-controlled fan 16 can blow air at a predetermined temperature. The temperature-controlled fan 16 can refer to the heating fans in existing products. A flow divider block 38 is fixedly connected to the lifting frame 39, and the outlet of the temperature-controlled fan 16 is connected to the flow divider block 38. The diverter block 38 connects to two air ducts 17, which are respectively connected to the detection box 12 and the preheating box 13. The air duct 17 connected to the detection box 12 is the first air duct 171, and the air duct 17 connected to the preheating box 13 is the second air duct 172. Both the detection box 12 and the preheating box 13 are equipped with air outlet hoods 37, which have multiple air outlets 22. The two air ducts 17 are respectively connected to the two air outlet hoods 37. The airflow from the outlet of the temperature control fan 16 enters the air outlet hood 37 through the diverter block 38 and the air ducts 17, and then blows air through the air outlets 22 to adjust the temperature of the frequency converters in the detection box 12 and the preheating box 13, ensuring that the frequency converters are at the detection temperature, while simultaneously preheating the frequency converters in the preheating box 13.

[0025] In the above embodiment, two frequency converters are placed in two installation positions respectively, and are limited by the limiting bracket 15 and connected to the circuit. The lifting cylinder 14 extends, causing the lifting frame 39 to move downward, so that the detection box 12 and the preheating box 13 cover the two frequency converters respectively. At this time, the temperature control fan 16 is started. The airflow at the predetermined temperature generated by the temperature control fan 16 enters the detection box 12 and the preheating box 13 through the diverter block 38 and the air duct 17. Then, the temperature of the frequency converter is adjusted through the air outlet 22 on the air outlet hood 37. At this time, the frequency converter in the detection box 12 is powered on for testing, and the frequency converter in the preheating box 13 is preheated to improve working efficiency.

[0026] When the inverter located in the test box 12 is being tested, the inverter in the preheating box 13 is preheated. After the inverter in the test box 12 has finished testing, the inverter in the test box 12 is taken out, and then the starting motor drives the rotating material tray 11 to rotate, so that the preheated inverter rotates to the position of the test box 12 for testing, ensuring work efficiency.

[0027] In one embodiment, a plurality of deflector vanes 40, each located within an air outlet 22, are rotatably disposed on the air outlet shroud 37, and the vanes 40 deflect synchronously. A sliding strip 18 is slidably connected to the air outlet shroud 37, and a rack 19 is fixedly connected to the sliding strip 18. A shaft end is fixedly connected to the deflector vane 40, and the shaft end is disposed on the air outlet shroud 37. A gear 25 is fixedly connected to the shaft end, and the gear 25 meshes with the rack 19. The reciprocating motion of the sliding strip 18 drives the rack 19 to move, which in turn drives the shaft end of the gear 25, causing the deflector vane 40 to deflect. This ensures that the airflow fully contacts the frequency converter, resulting in uniform temperature distribution within the frequency converter.

[0028] In the above embodiment, a spring 20 is connected between the sliding bar 18 and the lifting frame 39, with both ends of the spring 20 fixedly connected to the sliding bar 18 and the lifting frame 39, respectively. A connecting air duct 23 is fixedly installed inside the air outlet hood 37, and the connecting air duct 23 is connected to the air pipe 17. An impeller 24 is rotatably installed inside the connecting air duct 23. When airflow enters the air outlet hood 37, it drives the impeller 24 to rotate. A rotating shaft 26 is coaxially fixedly installed on the impeller 24, and a driven shaft 27 is rotatably installed on the air outlet hood 37. The rotating shaft 26 and the driven shaft 27 are connected by a transmission. Specifically, a synchronous belt is provided between the driven shaft 27 and the rotating shaft 26, so that the driven shaft 27 and the rotating shaft 26 rotate synchronously. A cam 28 is fixedly installed on the driven shaft 27, and the cam 28 abuts against the sliding bar 18. When the driven shaft 27 rotates, it drives the cam 28 to rotate, which in turn causes the sliding bar 18 to reciprocate under the action of the spring 20.

[0029] In one embodiment, a heat-conducting block 29 is fixedly disposed inside the detection box 12, and the heat-conducting block 29 is attached to one side of the frequency converter. An expansion piston 30 is fixedly disposed on the heat-conducting block 29, and an expansion gas is disposed inside the expansion piston 30. An adjusting baffle 31 is fixedly connected to one end of the piston rod of the expansion piston 30. The adjusting baffle 31 is inserted into the diverter block 38, and two ventilation ports 32 are opened on the adjusting baffle 31. Specifically, the expansion piston 30 includes a cylindrical piston cylinder and a piston rod that is slidably disposed inside the piston cylinder. When the temperature of the expansion gas inside the piston cylinder rises, it expands, thereby causing one end of the piston rod to extend out.

[0030] In the above embodiment, the diversion block 38 has two channels connected to the air outlet of the diversion block 38. The first duct 171 and the second duct 172 are respectively connected to the two channels. An adjusting baffle 31 is slidably disposed within the diversion block 38. The adjusting baffle 31 is inserted into the diversion block 38 and has two ventilation openings 32. The adjusting baffle 31 has two extreme states and an intermediate state between the two extreme states. When the adjusting baffle 31 is in the first extreme state, the adjusting baffle 31 blocks the channel connected to the first duct 171. At this time, the channel connected to the second duct 172 coincides with one ventilation opening 32, and the overlapping area is the largest. When the adjusting baffle 31 is in the second extreme state, the adjusting baffle 31 blocks the channel connected to the second duct 172. At this time, the channel connected to the first duct 171 coincides with one ventilation opening 32, and the overlapping area is the largest. The adjusting baffle 31 is fixedly connected to the piston rod end of the expansion piston 30. When the piston rod end of the expansion piston 30 extends to its maximum length, the adjusting baffle 31 is in the second limit state. When the overlap surface between the channel connected to the first air duct 171 and a vent 32 becomes larger, the overlap surface between the channel connected to the second air duct 172 and a vent 32 becomes smaller.

[0031] When the inverter in the detection box 12 generates heat and the temperature is higher than the detection temperature, the heat is transferred to the heat-conducting block 29, which in turn causes the gas in the expansion piston 30 to expand, which in turn causes the piston rod to extend and drive the adjusting baffle 31 to move towards the second limit state. This increases the airflow through the first air duct 171, dissipates the excess heat, and restores the temperature to the detection temperature.

[0032] In one embodiment, a synchronously rotating telescopic end 35 is fitted onto the driven shaft 27 inside the detection box 12. A connecting rod 45 is fixedly connected to one end of the piston rod of the expansion piston 30. A collar is fixedly provided at one end of the connecting rod 45, and the collar is fitted onto the telescopic end 35 and rotatably engages with it. An impeller air pump 33 is fixedly mounted on the lifting frame 39. A cooling air pipe 34 is connected to the air inlet of the impeller air pump 33, and the air outlet of the impeller air pump 33 is connected to the air duct 17 connected to the detection box 12. A mating end hole 36 is provided at the input shaft end of the impeller air pump 33, and the telescopic end 35 is inserted into the mating end hole 36 and engages with it. The lifting frame 39 can refer to a vortex air pump in existing products. One end of the cooling air pipe 34 is connected to a cooling vortex cooler to introduce lower temperature gas.

[0033] When the temperature is too high, the baffle 31 is adjusted to its second limit state. At this time, the telescopic end 35 is inserted into the mating end hole 36 under the action of the connecting rod 45. The telescopic end 35 and the mating end hole 36 have a non-circular cross-section, which drives the impeller air pump 33 to draw the cold air from the cold air pipe 34 to the first air pipe 171, causing the frequency converter in the detection box 12 to return to the detection temperature. This prevents cold air from directly entering the detection box 12, as excessive temperature difference could damage the frequency converter. At the same time, the rotation of the impeller 24 fully mixes the cold air with the airflow output from the splitter block 38, avoiding uneven airflow temperature.

[0034] In one embodiment, a fire extinguishing agent storage tank 42 is fixedly installed on the lifting frame 39, and multiple fire extinguishing nozzles 41 are installed inside the detection box 12. These nozzles 41 are located below the air outlet 22, and each nozzle has evenly distributed nozzle openings. The fire extinguishing nozzles 41 are connected to the fire extinguishing agent storage tank 42 via a control valve 44. A smoke sensor 43 is installed inside the detection box 12 and is electrically connected to the control valve 44. When the smoke sensor 43 detects smoke inside the detection box 12, it controls the control valve 44 to connect the fire extinguishing nozzles 41 and the fire extinguishing agent storage tank 42, causing fire-fighting foam to be sprayed from the nozzle openings of the fire extinguishing nozzles 41 for fire extinguishing. Simultaneously, the fire extinguishing nozzles 41 are located below the air outlet 22, so that when the control valve 44 is activated, the air outlet 22 deflects the foam through airflow, ensuring the foam coverage area and improving the fire extinguishing effect.

[0035] Working principle or usage: In the initial state, the lifting frame 39 is located at the top, and the adjusting partition 31 is in the middle position between the two extreme states.

[0036] 1. Place the two frequency converters in two installation positions respectively, limit them with the limit bracket 15 and connect the wiring. Extend the lifting cylinder 14 to make the lifting frame 39 move downward, so that the detection box 12 and the preheating box 13 cover the two frequency converters respectively. At this time, start the temperature control fan 16. The airflow at the predetermined temperature generated by the temperature control fan 16 enters the detection box 12 and the preheating box 13 through the diverter block 38 and the air duct 17. Then, adjust the temperature of the frequency converter through the air outlet 22 on the air outlet hood 37. At this time, the frequency converter in the detection box 12 is powered on for testing, and the frequency converter in the preheating box 13 is preheated to improve working efficiency.

[0037] 2. When the inverter in the test box 12 generates heat, causing the temperature to exceed the test temperature, the heat is transferred to the heat-conducting block 29, which in turn causes the gas in the expansion piston 30 to expand, causing the piston rod to extend and drive the adjusting baffle 31 to move towards the second limit state. This increases the airflow through the first air duct 171, expelling excess heat and restoring the temperature to the test temperature. When the temperature is too high, the adjusting baffle 31 moves to the second limit state. At this time, the telescopic end 35 is inserted into the mating end hole 36 under the action of the connecting rod 45. The telescopic end 35 and the mating end hole 36 are mated and have a non-circular cross-section, which in turn drives the impeller air pump 33 to draw the cold air from the cold air pipe 34 into the first air duct 171, causing the inverter in the test box 12 to return to the test temperature.

[0038] 3. When the smoke sensor 43 detects smoke, combustion occurs inside the detection box 12, which in turn controls the control valve 44 to connect the fire extinguishing nozzle 41 with the fire extinguishing agent storage tank 42, so that fire foam is sprayed out from the nozzle of the fire extinguishing nozzle 41 to extinguish the fire. Since the fire extinguishing nozzle 41 is located below the air outlet 22, when the control valve 44 sprays out, the air outlet 22 blows the foam by deflecting the airflow, ensuring the coverage of the foam and improving the fire extinguishing effect.

[0039] 4. After the inverter in the test box 12 has been tested, the lifting cylinder 14 retracts, thereby raising the lifting frame 39, so that the test box 12 and the preheating box 13 move upward. Then, the motor drives the rotating material tray 11 to rotate, so that the preheating motor rotates to the position of the test box 12. At the same time, the inverter to be tested is placed in the installation position on the lower side of the preheating box 13 for easy further testing.

[0040] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A device for testing the compensation performance of a frequency converter, characterized in that: include: A frame (10) is provided with a rotating material tray (11) on the frame (10), and two mounting positions for placing frequency converters are provided on the rotating material tray (11); The lifting frame (39) is movably mounted on the frame (10). The heat conduction block (29) is fixedly mounted with a detection box (12) and a preheating box (13). The detection box (12) and the preheating box (13) are respectively facing two installation positions. The air outlet hood (37) is provided in two sets, which are respectively installed in the detection box (12) and the preheating box (13); Temperature control fan (16) is fixedly installed on lifting frame (39); The air outlet cover (37) is provided with multiple air outlets (22), and multiple deflector vanes (40) are rotatably arranged on the air outlet cover (37) and located in the air outlets (22). A lifting cylinder (14) is fixedly installed on the frame (10). The piston rod end of the lifting cylinder (14) is fixedly connected to the lifting frame (39). The lifting frame (39) is driven to move up and down by the extension and retraction of the piston rod end of the lifting cylinder (14). The lifting frame (39) has two extreme positions. At the first extreme position, the lifting frame (39) is located at the top. At this time, the detection box (12) and the preheating box (13) are also located at the top. At the second extreme position, the lifting frame (39) is located at the bottom. At this time, the detection box (12) and the preheating box (13) are respectively covered in two installation positions, forming a space to accommodate the frequency converter with the rotating material tray (11).

2. The inverter compensation performance testing device according to claim 1, characterized in that: A diverter block (38) is fixedly installed on the lifting frame (39). The air outlet of the temperature control fan (16) is connected to the diverter block (38). Two channels are provided in the diverter block (38). The two channels are connected to the air outlet of the diverter block (38). Two air ducts (17) are connected to the diverter block (38) respectively. One end of one air duct (17) is connected to the air outlet hood (37) in the detection box (12). The other air duct (17) is connected to the air outlet hood (37) in the preheating box (13). A connecting air duct (23) is provided in the air outlet hood (37). The connecting air duct (23) is connected to the air duct (17). An impeller (24) is rotatably provided in the connecting air duct (23).

3. The inverter compensation performance testing device according to claim 2, characterized in that: The impeller (24) is coaxially fixed with a rotating shaft (26). A driven shaft (27) is rotatably mounted on the air outlet shroud (37). The rotating shaft (26) and the driven shaft (27) are connected by transmission. A cam (28) is fixedly mounted on the driven shaft (27). A sliding strip (18) is slidably mounted on the air outlet shroud (37). The cam (28) abuts against the sliding strip (18). A rack (19) is fixedly connected to the sliding strip (18). A shaft end that rotates with the lifting frame (39) is fixedly mounted on the deflector (40). A gear (25) is fixedly connected to the shaft end. The gear (25) meshes with the rack (19). A spring (20) is connected between the sliding strip (18) and the lifting frame (39). The two ends of the spring (20) are fixedly connected to the sliding strip (18) and the lifting frame (39) respectively.

4. The inverter compensation performance testing device according to claim 3, characterized in that: A heat-conducting block (29) is fixedly installed inside the detection box (12). The heat-conducting block (29) is attached to one side of the frequency converter. An expansion piston (30) is fixedly installed on the heat-conducting block (29). An expansion gas is installed inside the expansion piston (30). An adjustment partition (31) is fixedly connected to one end of the piston rod of the expansion piston (30). The adjustment partition (31) is inserted into the diverter block (38). Two ventilation holes (32) are opened on the adjustment partition (31).

5. The inverter compensation performance testing device according to claim 4, characterized in that: One of the driven shafts (27) is fitted with a synchronously rotating telescopic end (35). One end of the piston rod of the expansion piston (30) is fixedly connected to a connecting rod (45). One end of the connecting rod (45) is fixedly provided with a collar. The collar is fitted on the telescopic end (35) and rotates in cooperation with the telescopic end (35).

6. The inverter compensation performance testing device according to claim 5, characterized in that: An impeller air pump (33) is fixedly installed on the lifting frame (39). A cooling pipe (34) is connected to the air inlet end of the impeller air pump (33). The air outlet end of the impeller air pump (33) is connected to the air duct (17) connected to the detection box (12). A mating end hole (36) is provided at the input shaft end of the impeller air pump (33). The telescopic end (35) is inserted into the mating end hole (36) and mates with the mating end hole (36).

7. The inverter compensation performance testing device according to claim 1, characterized in that: A fire extinguishing agent storage tank (42) is fixedly installed on the lifting frame (39). Multiple fire extinguishing nozzles (41) are installed inside the detection box (12). The multiple fire extinguishing nozzles (41) are located below the air outlet (22). The fire extinguishing nozzles (41) are evenly provided with nozzles. The fire extinguishing nozzles (41) and the fire extinguishing agent storage tank (42) are connected by a control valve (44). A smoke sensor (43) is installed inside the detection box (12). The smoke sensor (43) is electrically connected to the control valve (44).

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