Frequency converter performance detection device

Abstract

The invention discloses a frequency converter performance detection device, and relates to the technical field of frequency converters, the frequency converter performance detection device comprises a detection box, a heat-conducting fin is arranged in the detection box, and the heat-conducting fin is of a four-side square structure and forms a sealed cold and hot channel on the edge of an inner cavity of the detection box; the multiple damping shock absorbers are arranged at the bottom of the detection box; the vibration generator is arranged at the lower part of the detection box and is used for providing a vibration source for the detection box; the output end of the humidifier is communicated with the inner cavity of the detection box; and the output end of the cold-hot generator communicates with the cold-hot channel. The vibration generator, the humidifier and the cold and heat generator are arranged, the detection box is matched, multifunctional simulation of vibration, high-humidity, high-temperature and low-temperature environments in the peripheral environment is achieved, stability detection of the frequency converter under the extreme environment is achieved, and the cold and heat channel in a circulating circulation state is formed in the inner edge of the detection box; cold and hot air covers the detection box for multi-surface circulation, so that the distribution uniformity of the cold and hot air is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of frequency converters, and in particular to a frequency converter performance detection device. Background Art

[0002] The principle of the frequency converter is to apply the principles of frequency conversion technology and microelectronics technology. It controls the power control equipment of the AC motor by changing the working power frequency of the motor. The power supply used is divided into AC power supply and DC power supply. Generally, DC power supply is obtained by transforming the AC power supply through a transformer, rectifying and filtering.

[0003] After the inverter is produced, it is necessary to conduct a self-test on the inverter performance. The existing self-test mainly includes functional tests on the stability of the inverter voltage, current, frequency, power, harmonics, etc., and the inverter is used in various fields, and the use environment of the inverter is also diverse. For example, whether it will affect the inverter itself and its functional stability when used in a high temperature, low temperature or high humidity environment. When the inverter is transported or used on a vehicle, there will be low-frequency or high-frequency vibrations when encountering speed bumps, potholes, etc. during driving. Whether the vibration will affect the functional stability of the inverter also needs to be considered. External environmental factors also seriously affect the use of the inverter; Among the existing published patent documents, the announcement number is CN216485274U, a quality inspection device for electronic product research and development, including an inspection box, a humidification mechanism and a cooling mechanism are fixedly installed inside the inspection box, a spring is fixedly installed on the inner wall of the bottom of the inspection box, a fixed plate is fixedly installed on the end of the spring away from the inspection box, a support plate and two sets of fixed frames are fixedly installed on the surface of the fixed plate, the electronic product body is installed on the surface of the support plate, and an electric slide is fixedly installed inside the two sets of fixed frames, a pressure plate is fixedly installed on one side of the sliding block of the electric slide, and a rubber pad is fixedly installed on the bottom of the pressure plate. Although a cooling mechanism is set to realize low-temperature detection, it only has the limitation of temperature testing in low-temperature testing, and the cold source is set on one side of the local area, which has the disadvantages of too low local temperature and uneven temperature in the test box, affecting the quality of the experiment.

[0004] Therefore, it is necessary to invent a frequency converter performance detection device to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a frequency converter performance detection device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a frequency converter performance detection device, comprising: The detection box is provided with a heat conducting sheet inside, and the heat conducting sheet is in a quadrilateral structure to form a sealed hot and cold channel at the edge of the inner cavity of the detection box; A damping shock absorber is provided, and is arranged in a plurality and mounted on the bottom of the test box; A vibration generator is arranged at the bottom of the detection box and is used to provide a vibration source for the detection box. The output frequency and output strength of the vibration generator are adjustable. A humidifier, an output end of which is communicated with the inner cavity of the detection box; The cold and hot generator has an output end including cooling and heating, and the output end is connected to the cold and hot channels.

[0007] Optionally, it also includes a base, a storage plate is provided on the upper part of the base, the damping shock absorber is connected between the base and the storage plate, the vibration generator is installed inside the base, and the detection box is fixedly installed on the storage plate.

[0008] Optionally, the vibration generator includes a driving mechanism and a cam, the driving mechanism includes a bracket, a lifting mechanism, a middle gear, a small gear, a large gear, a pulley group and a second motor, the lifting mechanism and the second motor are both fixedly mounted on the bracket, the cam is rotatably mounted on the output end of the lifting mechanism, the middle gear is coaxially connected to the cam, the small gear and the large gear are respectively arranged on the upper and lower parts of the middle gear, the small gear and the large gear are both rotatably mounted on the bracket, the small gear and the large gear are transmission connected by a pulley group, the output end of the second motor is coaxially connected to the small gear or the large gear, and the small gear and the large gear can be meshed with the middle gear.

[0009] Optionally, a plurality of induced draft fans are dispersedly installed inside the cold and hot channels to form a unidirectional annular circulation air duct, and a plurality of through holes are provided on the other three sides of the heat conductive plate except the side adjacent to the cold and hot generators, and the number distribution of the plurality of through holes from the output end to the input end of the cold and hot source of the cold and hot channels gradually changes from sparse to dense.

[0010] Optionally, the cold and hot generator includes a semiconductor refrigeration plate, a heat sink and a heat dissipation fan. The semiconductor refrigeration plate includes a cold surface and a hot surface. The cold surface and the hot surface of the semiconductor refrigeration plate are both equipped with heat sinks. Heat dissipation fans are installed on the outside of the heat sinks. The side wall of the detection box is provided with a mounting groove body connected to the cold and hot channels, and the semiconductor refrigeration plate is rotatably installed in the mounting groove body.

[0011] Optionally, it also includes a driven gear, a driving gear and a first motor, wherein the driven gear is coaxially connected to the rotation axis of the semiconductor refrigeration plate, the driving gear is independently rotatably installed and meshingly connected to the driven gear, and the first motor is independently fixedly installed and the output end is coaxially connected to the driving gear.

[0012] Optionally, a detection wiring is provided inside the detection box, and a temperature sensor and a humidity sensor are installed inside the detection box.

[0013] Optionally, a clamping mechanism is installed inside the detection box, and the clamping mechanism includes a side clamping plate and an upper clamping plate. The side clamping plates are provided in two and are arranged in parallel. The side clamping plates can move in the horizontal direction, and the upper clamping plate can move in the vertical direction.

[0014] Optionally, the clamping mechanism also includes a first spur gear, a first rack, a second rack, a first bevel gear, a second bevel gear, a second spur gear, a third rack and a third motor, the axis of the first spur gear being vertically arranged, the first rack and the second rack being horizontally arranged and arranged on opposite sides of the first spur gear and meshingly connected with the first spur gear, the opposite ends of the first rack and the second rack being fixedly connected to two side clamping plates respectively, the first bevel gear is coaxially connected to the first spur gear, the axis of the second bevel gear is horizontally arranged and meshingly connected with the first bevel gear, the second spur gear is coaxially connected to the second bevel gear, the third rack is vertically arranged and meshingly connected with the second spur gear, the top end of the third rack is fixedly connected to the upper clamping plate, the output end of the third motor is coaxially connected to the first bevel gear, the third motor is independently fixed, and the first spur gear, the first bevel gear, the second bevel gear and the second spur gear are independently rotatably installed.

[0015] Optionally, it also includes a polished rod and a sliding sleeve, the inner sides of the two side clamps are fixedly connected with two horizontally arranged polished rods, the bottom of the upper clamp is fixedly connected with two vertically arranged polished rods, the outer sides of the polished rods are fitted with sliding sleeves, and the sliding sleeves are independently fixedly installed.

[0016] Technical effects and advantages of the present invention: 1. The present invention realizes multifunctional simulation of vibration, high humidity, high temperature and low temperature environments in the peripheral environment by setting a vibration generator, a humidifier and a hot and cold generator, and adapting a detection box, so as to realize the stability detection of the inverter in extreme environments.

[0017] 2. The inner edge of the detection box of the present invention is provided with hot and cold channels in a circulating state, and the hot and cold air covers multiple surfaces of the detection box, thereby improving the uniformity of the distribution of the hot and cold air and avoiding local overheating or overcooling that affects the quality of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the vertical structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the main cross-sectional structure of the present invention.

[0020] Figure 3 It is a schematic diagram of the front and cross-sectional structure of the detection box of the present invention.

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the cold and hot generator of the present invention.

[0022] Figure 5 For the present invention Figure 3 Schematic diagram of the local enlarged structure at point A in the middle.

[0023] Figure 6 It is a schematic diagram of the cross-sectional structure of the base of the present invention.

[0024] Figure 7 It is a schematic diagram of the main structure of the vibration generator of the present invention.

[0025] Figure 8 This is a schematic diagram of the disassembled structure of the vibration generator of the present invention.

[0026] Fig. 9 It is a schematic diagram of the main structure of the damping shock absorber of the present invention.

[0027] Fig.10 It is a schematic diagram of the vertical structure of the clamping mechanism of the present invention.

[0028] Fig.11 It is a schematic diagram of a partial vertical structure of the clamping mechanism of the present invention.

[0029] In the figure: base 1, detection box 2, damping shock absorber 3, vibration generator 4, humidifier 5, hot and cold generator 6, heat conducting sheet 7, hot and cold channel 8, clamping mechanism 9, detection wiring 10, box door 11, storage plate 12, flexible sealing cover 13, fixing rod 14, induced draft fan 15, temperature sensor 16, humidity sensor 17, semiconductor cooling sheet 18, heat sink 19, heat dissipation fan 20, driven gear 21, driving gear 22, first motor 23, guide plate 24, through hole 25, drive Mechanism 26, cam 27, bracket 28, lifting mechanism 29, middle gear 30, small gear 31, large gear 32, pulley set 33, second motor 34, damping telescopic rod 35, rubber pad 36, spring 37, tray 38, limit plate 39, side clamping plate 40, upper clamping plate 41, first spur gear 42, first rack 43, second rack 44, first bevel gear 45, second bevel gear 46, second spur gear 47, third rack 48, third motor 49, light rod 50, sliding sleeve 51. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] The present invention provides Figure 1-11 The inverter performance detection device shown includes a base 1 and a detection box 2. The detection box 2 is placed on the upper part of the base 1, and the inverter is placed in the detection box 2 for detection. This device is mainly used for the vibration resistance, environmental high and low temperature and environmental humidity impact test of the inverter.

[0035] like Figure 1 As shown: a door 11 is provided on the front side of the detection box 2 for the inverter to enter and exit.

[0036] like Figure 3As shown: a heat conducting sheet 7 is arranged inside the box body of the test box 2. The heat conducting sheet 7 is in a four-sided square structure. Gaps are left between the outer sides of the four sides and the upper, lower, left and right sides of the box body of the test box 2 to form a hot and cold channel 8. The heat conducting sheet 7 is fixed to the box body of the test box 2 by a plurality of fixing rods 14. The front and rear ends of the heat conducting sheet 7 are sealed and fixed to the box body of the test box 2, so that the hot and cold channel 8 forms an annular closed-loop channel. The inner cavity of the square-structured heat conducting sheet 7 is a test cavity, and the inner bottom wall of the test cavity is a flat surface for placing the inverter. The box body of the test box 2 A cold and hot generator 6 is installed on the inner side, and the output end of the cold and hot generator 6 is connected to the cold and hot channel 8 to provide a cold source and a heat source. A plurality of induced draft fans 15 are installed in the cold and hot channel 8 to form a unidirectional annular circulation air duct. The circulating air passes through the cold source or heat source of the cold and hot generator 6 to form cold air or hot air, and conducts heat to the test chamber through the heat conducting sheet 7 to realize the cold and hot test of the inverter. The cold and hot channel 8 with an annular structure provides cold or heat, which improves the consistency of the temperature of each area in the test chamber and avoids local overheating or overcooling from affecting the experiment. The detection box 2 is provided with a detection wiring 10 inside. The detection wiring 10 is located in the test cavity and is electrically connected to the frequency converter. The detection wiring 10 is externally connected to the frequency converter function detection equipment to detect the frequency converter function status. The function detection equipment includes but is not limited to detecting the frequency converter voltage, current, frequency, power, harmonics, etc.; A clamping mechanism 9 is installed in the test chamber to clamp and fix the frequency converter; A temperature sensor 16 and a humidity sensor 17 are installed in the test chamber to monitor the temperature and humidity in the test chamber.

[0037] like Figure 5 As shown: guide plates 24 are provided at the four outer corners of the hot and cold channels 8, and the guide plates 24 are installed on the box body of the detection box 2. The guide plates 24 are in an arc-shaped structure to reduce the collision resistance of the flowing air. A number of through holes 25 are provided on the other three sides of the heat conductive sheet 7 except the side adjacent to the hot and cold generator 6. The air in the hot and cold channels 8 enters the test cavity through the through holes 25. The hot and cold channels 8 are formed by the air passing through the hot and cold generator 6 to form cold air or hot air as the output end, and arrive at the hot and cold generator 6 as the input end after circling the hot and cold channels 8. The number distribution of the through holes 25 from the output end to the input end of the hot and cold channels 8 gradually changes from sparse to dense. Since the heat dissipation energy of the cold air or hot air is consumed during the flow process, the reasonable distribution of the number of through holes 25 further improves the uniformity of the temperature distribution in the test cavity.

[0038] like Figure 3 and 4As shown: the cold and hot generator 6 includes a semiconductor refrigeration sheet 18, a heat sink 19 and a heat dissipation fan 20. The semiconductor refrigeration sheet 18 includes a cold surface and a hot surface. The cold surface and the hot surface of the semiconductor refrigeration sheet 18 are both installed with heat sinks 19. The outer side of the heat sink 19 is installed with a heat dissipation fan 20. The box body of the detection box 2 is provided with a mounting groove body protruding outward, and the mounting groove body is connected with the cold and hot channels 8. The semiconductor refrigeration sheet 18 is rotatably installed in the mounting groove body. The semiconductor refrigeration sheet 18 and its rotating shaft are coaxially connected with a driven gear 21. The driven gear 21 is meshed and connected with a driving gear 22. The driven gear 21 and the driving gear 22 are both rotatably installed in the box body of the detection box 2. A first motor 23 is fixedly installed on the box body of the detection box 2. The output end of the first motor 23 is coaxially connected with the driving gear 22. A heat dissipation window is provided on the side of the mounting groove body away from the cold and hot channels 8 for dissipating the semiconductor refrigeration sheet 18. Heat, and when the cold surface or hot surface of the semiconductor refrigeration plate 18 corresponds to the level of the cold and hot channels 8 for cooling or heating, the semiconductor refrigeration plate 18 will seal the installation slot and the cold and hot channels 8 to ensure that the air at the cold end and the hot end do not intersect during heating or cooling. The specific semiconductor refrigeration plate 18 is rotatably installed, and the driving gear 22 is driven by the first motor 23 to drive the driven gear 21 to rotate, thereby driving the semiconductor refrigeration plate 18 to rotate, and adjusting the cold end or hot end of the semiconductor refrigeration plate 18 to be located in the cold and hot channels 8 to achieve cooling or heating in the cold and hot channels 8. It should be noted that during the cooling or heating process, the heat dissipation fan 20 located in the cold and hot channels 8 stops working, and the other heat dissipation fan 20 works to dissipate heat to achieve cooling or heating of the semiconductor refrigeration plate 18. The cold and hot generator 6 adopts the semiconductor refrigeration plate 18 and realizes cooling and heating through the rotation adjustment of the semiconductor refrigeration plate 18, thereby reducing the manufacturing cost of the equipment.

[0039] like Figure 2 As shown: a plurality of damping shock absorbers 3 are installed on the top edge of the base 1, and a vibration generator 4 is installed inside the base 1.

[0040] like Figure 6 As shown: a storage plate 12 is installed on the top of several damping shock absorbers 3, and the vibration generator 4 includes a driving mechanism 26 and a cam 27. The cam 27 rotates and intermittently hits the storage plate 12 to achieve vibration of the storage plate 12 and the structure on the storage plate 12.

[0041] like Figure 7 and 8As shown in the figure, the cam 27 is a cam structure formed by a circular wheel with an arc-shaped protrusion on the edge. When rotating, the arc-shaped protrusion of the cam 27 intermittently hits the storage plate 12. The driving mechanism 26 includes a bracket 28, a lifting mechanism 29, a middle gear 30, a small gear 31, a large gear 32, a pulley group 33 and a second motor 34. The lifting mechanism 29 and the second motor 34 are both fixedly mounted on the bracket 28. The lifting mechanism 29 includes but is not limited to using an electric slide rail, and the electric slide rail guide is vertically arranged. The cam 27 is rotatably mounted on the sliding part of the electric slide rail. The middle gear 30 is coaxially connected to the cam 27. The small gear 31 and the large gear 32 are respectively arranged in the middle gear 30 and the cam 27. The upper and lower parts of the gear 30, the small gear 31 and the large gear 32 are rotatably mounted on the bracket 28, the pulley set 33 includes a pulley and a transmission belt, the pulleys are set to two and are of the same size, rotatably mounted on the bracket 28 and are coaxially connected to the small gear 31 and the large gear 32 respectively, the two pulleys are connected by transmission belt transmission, the output end of the second motor 34 is coaxially connected to a pulley, wherein the middle gear 30 can be meshed with the small gear 31 or meshed with the large gear 32 under the drive of the lifting mechanism 29, and the diameter of the small gear 31 is smaller than the diameter of the middle gear 30, and the diameter of the middle gear 30 is smaller than the diameter of the large gear 32; Specifically, the second motor 34 drives the pulley set 33 to rotate, and the pulley set 33 drives the small gear 31 and the large gear 32 to rotate. When the middle gear 30 is meshed with the small gear 31, the speed of the middle gear 30 is less than that of the small gear 31, that is, the cam 27 is driven to rotate at a low speed, and the cam 27 is located at a high position, and a heavy hit is achieved when it collides with the storage plate 12, simulating the vibration of the vehicle when encountering speed bumps and a small number of deep pits during driving. The lifting mechanism 29 drives the middle gear 30 to descend and mesh with the large gear 32, and the cam 27 descends and increases speed driven by the large gear 32, and hits the storage plate 12 at high speed, simulating the vibration during driving on bumpy and potholes. The simulation of different states fits the actual application and improves the test quality. The vibration generator 4 adopts a mechanical structure to reduce the production cost, and the conversion of high and low frequencies is mechanically adjusted. The second motor 34 does not need to adopt variable-speed motors such as frequency converters, which further reduces the production cost.

[0042] like Fig. 9 As shown: the damping shock absorber 3 includes a damping telescopic rod 35 and a spring 37. The damping telescopic rod 35 includes an outer tube and an inner rod. A tray 38 is fixedly installed on the top end of the outer tube. The spring 37 is sleeved on the outside of the inner rod and fixedly installed on the tray 38. A limit plate 39 is fixedly installed on the outer end of the inner rod. The top end of the spring 37 is fixed to the limit plate 39. The damping telescopic rod 35 and the spring 37 are adapted to achieve shock absorption during vehicle driving, and the structural design shortens the use length of the spring 37 and reduces costs. The outer end of the inner rod is fixedly connected to a rubber pad 36 for fixing to the storage plate 12 to achieve flexible connection of the damping shock absorber 3 and reduce friction loss during rigid connection.

[0043] like Figure 1 As shown: the base 1 and the storage plate 12 are sealed by a flexible sealing cover 13, the damping shock absorber 3 and the inner cavity of the base 1 are sealed, and the detection box 2 is fixedly installed on the upper part of the storage plate 12; like Figure 1 and 3 As shown: a humidifier 5 is installed on the storage plate 12, and the output end of the humidifier 5 passes through the detection box 2 and is connected to the test cavity. The humidifier 5 adopts a humidifier with adjustable output to increase the humidity in the test cavity, simulate a high humidity environment, and realize the humidity test of the inverter.

[0044] like Fig.10 and 11 As shown: the clamping mechanism 9 includes a side clamping plate 40 and an upper clamping plate 41. Two side clamping plates 40 are provided, which are parallel to the left and right side walls of the detection box 2. The upper clamping plate 41 is parallel to the upper wall of the detection box 2 and is adapted to the bottom surface of the heat conducting sheet 7. The inverter is clamped on the left and right and up and down. The four-sided clamping improves the stability of the inverter placement, and the clamping mechanism 9 is used to fix the inverter, which is convenient and quick to operate. The clamping mechanism 9 also includes a first spur gear 42, a first rack gear 43, a second rack gear 44, a first bevel gear 45, a second bevel gear 46, a second spur gear 47, a third rack gear 48 and a third motor 49. The axis of the first spur gear 42 is vertically arranged, the first rack gear 43 and the second rack gear 44 are horizontally arranged and arranged on the opposite side of the first spur gear 42 and meshed with the first spur gear 42. The opposite ends of the first rack gear 43 and the second rack gear 44 are fixedly connected to the two side clamping plates 40 respectively, the first bevel gear 45 is coaxially connected to the first spur gear 42, the axis of the second bevel gear 46 is horizontally arranged and meshed with the first bevel gear 45, the second spur gear 47 is coaxially connected to the second bevel gear 46, the third rack gear 48 is vertically arranged and meshed with the second spur gear 47, and the top of the third rack gear 48 is fixedly connected to the second bevel gear 47. The upper clamping plate 41 is fixedly connected, the output end of the third motor 49 is coaxially connected to the first bevel gear 45, the third motor 49 is independently fixed, the first spur gear 42, the first bevel gear 45, the second bevel gear 46 and the second spur gear 47 are independently rotatably installed, the side clamping plate 40 and the upper clamping plate 41 are arranged inside the test cavity, the third motor 49 drives the first bevel gear 45 to rotate, and the first spur gear 42 rotates accordingly, the rotation of the first spur gear 42 drives the first rack 43 and the second rack 44 to move in the opposite direction, the first bevel gear 45 drives the second bevel gear 46 meshing therewith to rotate, and drives the second spur gear 47 to rotate, the second spur gear 47 drives the third rack 48 meshing therewith to move up and down, thereby realizing the movement of the two side clamping plates 40 and the upper clamping plate 41, and realizing the clamping and unclamping of the frequency converter; Two horizontally arranged light rods 50 are fixedly connected to the inner sides of the two side clamps 40, and two vertically arranged light rods 50 are fixedly connected to the bottom of the upper clamp 41. The outer sides of the light rods 50 are fitted with sliding sleeves 51. The sliding sleeves 51 are independently fixedly installed to limit the sliding of the light rods 50, thereby realizing stable meshing movement of the rack and improving the stability of the installation of the two side clamps 40 and the upper clamp 41.

[0045] The detection box 2 is also equipped with a main control system for manipulating and controlling the opening and closing and movement of each mechanism.

[0046] The present invention also provides a detection method of the device: Connect the detection wiring 10 to the inverter to test its functional stability; Humidity detection: set the ambient humidity value, turn on the humidifier 5 to humidify the inside of the test box 2, the humidity sensor 17 monitors the ambient humidity inside the test box 2 in real time and transmits the data to the main control system, the main control system controls the output of the humidifier 5 to maintain the set humidity value, and observes the functional stability of the inverter; Low temperature detection: set the low temperature detection value, the cold end of the cold and hot generator 6 is located in the cold and hot channel 8, the semiconductor refrigeration plate 18 is started, the induced draft fan 15 is started, the heat dissipation fan 20 at the hot end of the semiconductor refrigeration plate 18 is started, the temperature sensor 16 monitors the temperature in the detection box 2 and transmits the data to the main control system, the main control system controls the speed of the heat dissipation fan 20 and the induced draft fan 15 to achieve a constant temperature in the detection box 2, and observe the functional stability of the inverter; High temperature detection: set the high temperature detection value, the first motor 23 starts to rotate the cold and hot generator 6 so that the hot end of the semiconductor refrigeration plate 18 is located in the cold and hot channel 8, the semiconductor refrigeration plate 18 is started, the induced draft fan 15 is started, the heat dissipation fan 20 of the cold end of the semiconductor refrigeration plate 18 is started, the temperature sensor 16 monitors the temperature in the detection box 2 and transmits the data to the main control system, the main control system controls the speed of the heat dissipation fan 20 and the induced draft fan 15 to achieve the constant temperature in the detection box 2, and observe the functional stability of the inverter; Low-frequency shock detection: The vibration generator 4 is started, the lifting mechanism 29 drives the cam 27 to rise and the middle gear 30 is meshed with the small gear 31, and the second motor 34 is started to drive the cam 27 to rotate at a low speed to observe the functional stability of the inverter; High-frequency light vibration detection: The vibration generator 4 starts the lifting mechanism 29 to drive the cam 27 to descend and the middle gear 30 is meshed with the large gear 32. The second motor 34 starts to drive the cam 27 to rotate at high speed to observe the functional stability of the inverter.

[0047] It should be noted that humidity detection, temperature detection and vibration detection can be carried out simultaneously, but low-temperature detection and high-temperature detection cannot be detected simultaneously, and low-frequency shock detection and high-frequency light shock detection cannot be detected simultaneously.

[0048] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A frequency converter performance detection device, characterized in that: include: The detection box (2) is provided with a heat conducting sheet (7) inside, and the heat conducting sheet (7) is in a square structure to form a sealed hot and cold channel (8) at the edge of the inner cavity of the detection box (2); A plurality of damping shock absorbers (3) are installed at the bottom of the detection box (2); A vibration generator (4) is disposed at the bottom of the detection box (2) and is used to provide a vibration source for the detection box (2); the output frequency and output strength of the vibration generator (4) are adjustable; A humidifier (5), the output end of which is in communication with the inner cavity of the detection box (2); The cold and hot generator (6) has an output end that includes cooling and heating, and the output end is in communication with the cold and hot channel (8).

2. A frequency converter performance detection device according to claim 1, characterized in that: It also comprises a base (1), a storage plate (12) being provided on the upper part of the base (1), the damping shock absorber (3) being connected between the base (1) and the storage plate (12), the vibration generator (4) being installed inside the base (1), and the detection box (2) being fixedly installed on the storage plate (12).

3. A frequency converter performance detection device according to claim 2, characterized in that: The vibration generator (4) comprises a driving mechanism (26) and a cam (27), wherein the driving mechanism (26) comprises a bracket (28), a lifting mechanism (29), a middle gear (30), a small gear (31), a large gear (32), a pulley group (33) and a second motor (34), wherein the lifting mechanism (29) and the second motor (34) are both fixedly mounted on the bracket (28), the cam (27) is rotatably mounted on the output end of the lifting mechanism (29), and the middle gear (30) and the cam (27) are connected to each other. 7) are coaxially connected, the pinion (31) and the large gear (32) are respectively arranged on the upper part and the lower part of the middle gear (30), the pinion (31) and the large gear (32) are both rotatably mounted on the bracket (28), the pinion (31) and the large gear (32) are transmission-connected via a pulley set (33), the output end of the second motor (34) is coaxially connected to the pinion (31) or the large gear (32), and the pinion (31) and the large gear (32) can both be meshed and connected with the middle gear (30).

4. The frequency converter performance detection device according to claim 1, characterized in that: A plurality of induced draft fans (15) are dispersedly installed inside the hot and cold channels (8) to form a unidirectional annular circulation air duct. The heat conducting plate (7) is provided with a plurality of through holes (25) on the other three sides except the side adjacent to the hot and cold generator (6). The number distribution of the plurality of through holes (25) from the output end to the input end of the hot and cold source of the hot and cold channels (8) gradually changes from sparse to dense.

5. The frequency converter performance detection device according to claim 1, characterized in that: The cold and hot generator (6) comprises a semiconductor refrigeration sheet (18), a heat sink (19) and a heat dissipation fan (20); the semiconductor refrigeration sheet (18) comprises a cold surface and a hot surface; the cold surface and the hot surface of the semiconductor refrigeration sheet (18) are both mounted with heat sinks (19); the outer sides of the heat sinks (19) are both mounted with heat dissipation fans (20); the side wall of the detection box (2) is provided with a mounting slot body connected to the cold and hot channels (8); the semiconductor refrigeration sheet (18) is rotatably mounted in the mounting slot body.

6. A frequency converter performance detection device according to claim 5, characterized in that: It also includes a driven gear (21), a driving gear (22) and a first motor (23), wherein the driven gear (21) is coaxially connected to the rotation axis of the semiconductor cooling plate (18), the driving gear (22) is independently rotatably mounted and meshingly connected to the driven gear (21), and the first motor (23) is independently fixedly mounted and its output end is coaxially connected to the driving gear (22).

7. The frequency converter performance detection device according to claim 1, characterized in that: A detection connection (10) is provided inside the detection box (2), and a temperature sensor (16) and a humidity sensor (17) are installed inside the detection box (2).

8. The frequency converter performance detection device according to claim 1, characterized in that: A clamping mechanism (9) is installed inside the detection box (2), and the clamping mechanism (9) comprises a side clamping plate (40) and an upper clamping plate (41). The side clamping plates (40) are provided in two and are arranged in parallel. The side clamping plates (40) can move in a horizontal direction, and the upper clamping plate (41) can move in a vertical direction.

9. The frequency converter performance detection device according to claim 8, characterized in that: The clamping mechanism (9) further comprises a first spur gear (42), a first rack gear (43), a second rack gear (44), a first bevel gear (45), a second bevel gear (46), a second spur gear (47), a third rack gear (48) and a third motor (49); the axis of the first spur gear (42) is vertically arranged; the first rack gear (43) and the second rack gear (44) are horizontally arranged and arranged on opposite sides of the first spur gear (42) and meshingly connected with the first spur gear (42); the opposite ends of the first rack gear (43) and the second rack gear (44) are respectively fixedly connected to the two side clamping plates (40); the first bevel gear (45) and the first spur gear (42) are respectively fixedly connected to the two side clamping plates (40); the first bevel gear (45) and the first spur gear (42) are meshingly connected to the two side clamping plates (40); the first bevel gear (45) and the first spur gear (42) are meshingly connected to the two side clamping plates (40); the first bevel gear (45) and the second rack gear (4 ... rack gear (44) are meshingly connected to the two side clamping plates (40); the first bevel gear (46) and the second rack gear (44) are meshingly connected to the two side clamping plates (40); the first bevel gear (45) and the first rack gear (44) are meshingly connected to the two side clamping plates (40); the first bevel gear (45) and (42) are coaxially connected, the axis of the second bevel gear (46) is horizontally arranged and meshed with the first bevel gear (45), the second spur gear (47) is coaxially connected with the second bevel gear (46), the third rack (48) is vertically arranged and meshed with the second spur gear (47), the top end of the third rack (48) is fixedly connected to the upper clamping plate (41), the output end of the third motor (49) is coaxially connected with the first bevel gear (45), the third motor (49) is independently fixed, and the first spur gear (42), the first bevel gear (45), the second bevel gear (46) and the second spur gear (47) are respectively and independently rotatably mounted.

10. The frequency converter performance detection device according to claim 9, characterized in that: It also comprises a polished rod (50) and a sliding sleeve (51), wherein the inner sides of the two side clamps (40) are fixedly connected to two horizontally arranged polished rods (50), the bottom of the upper clamp (41) is fixedly connected to two vertically arranged polished rods (50), and the outer sides of the polished rods (50) are fitted with sliding sleeves (51), and the sliding sleeves (51) are independently fixedly installed.

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