Combined high-voltage frequency converter

Abstract

The utility model discloses a combined high-voltage frequency converter, which comprises a fan, a ventilation pipe, frequency conversion boxes and limiting pieces, a plurality of frequency conversion boxes are arranged in sequence, adjacent frequency conversion boxes are connected into an integral structure through the limiting pieces, and the frequency conversion box at the head end is connected with the fan through the ventilation pipe; wherein each frequency conversion box comprises an air inlet bin, a maintenance bin and a negative pressure bin, the negative pressure bin and the air inlet bin are installed on the end face of the upper side and the end face of the lower side of the maintenance bin respectively, each frequency conversion box is an independent standardized unit and comprises the maintenance bin and the negative pressure bin communicated with the maintenance bin, and the independent standardized units are sequentially connected to form a whole. The adjacent negative pressure bins are communicated in the mode that the first connecting pipes are inserted into the second connecting pipes, and when the draught fan operates, cold air sequentially passes through the air inlet grooves, the air inlet bins, the overhaul bins and the negative pressure bins of all the frequency conversion boxes to take away heat, so that the multiple frequency conversion boxes can work cooperatively and do not affect one another.

Description

Technical Field

[0001] This utility model relates to the field of high voltage frequency converter technology, and in particular to a combined high voltage frequency converter. Background Technology

[0002] A high-voltage frequency converter is a power regulation device used to control high-power motors. It can convert AC power with fixed frequency and voltage into AC power with adjustable frequency and voltage, thereby achieving precise control and speed regulation of the motor. High-voltage frequency converters play an important role in industrial automation and energy conservation. With the continuous advancement of technology, its application scope and market demand will continue to expand.

[0003] Chinese Patent Publication No. CN221961711U discloses a combined high-voltage frequency converter, including a main assembly base, with auxiliary assembly bases on both sides of the main assembly base. The top surfaces of both the main and auxiliary assembly bases have movable grooves, and the inner cavities of the movable grooves are rotatably connected to lead screws. Movable seats are threaded onto the outer sides of the lead screws, and mounting seats are fixedly connected to the tops of the movable seats. A frequency converter box is mounted on the top of each mounting seat. In this invention, multiple auxiliary assembly bases are installed on the sides of the main assembly base through the cooperation of slots and blocks, and frequency converter boxes are installed on the mounting seats on the main and auxiliary assembly bases. This allows for the combination of multiple frequency converter boxes, and the cooperation between the lead screws and movable seats enables individual mounting seats and frequency converter boxes to be pulled out of the combined frequency converter, thereby facilitating convenient maintenance of the device and improving the practicality of the combined high-voltage frequency converter.

[0004] The above-mentioned technology enables the combined application of multiple high-voltage frequency converters and can cool down multiple high-voltage frequency converters. However, the number of high-voltage frequency converters needs to be customized and cannot be temporarily adjusted according to different power and application scenario requirements. Customization is costly, time-consuming, and has great application limitations, making it unsuitable for widespread application. Therefore, this utility model discloses a combined high-voltage frequency converter to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a combined high-voltage frequency converter to solve the technical problems mentioned in the background art, where the number of high-voltage frequency converters in traditional combined high-voltage frequency converters needs to be customized, and cannot be temporarily adjusted according to different power and application scenario requirements. Furthermore, customization is costly, time-consuming, and has great application limitations, making it unsuitable for widespread application.

[0006] To achieve the above objectives, the present invention provides the following solution to the aforementioned technical problems:

[0007] A combined high-voltage frequency converter includes a fan, a ventilation duct, a frequency converter box, and a limiting component. Multiple frequency converter boxes are arranged in sequence, and adjacent frequency converter boxes are connected to each other as an integral structure by limiting components. The first frequency converter box is connected to a fan through a ventilation duct.

[0008] The frequency converter box includes an air inlet chamber, a maintenance chamber, and a negative pressure chamber. The negative pressure chamber and the air inlet chamber are respectively installed on the upper and lower end faces of the maintenance chamber. A first connecting pipe is fixedly embedded on one outer wall of the negative pressure chamber, and a second connecting pipe is fixedly embedded on the other inner wall of the negative pressure chamber. The outer diameter of the first connecting pipe is adapted to the inner diameter of the second connecting pipe. The length of the first connecting pipe is greater than the length of the second connecting pipe, and a valve plate is hinged to the upper side of the end of the second connecting pipe away from the inner wall of the negative pressure chamber.

[0009] As a further embodiment of this utility model, the fan is located directly above the first-end frequency converter box, and a ventilation pipe is sleeved between the input end of the fan and the adjacent first connecting pipe.

[0010] As a further embodiment of this utility model, an upper port is provided on the upper end face of the maintenance chamber, and a negative pressure pipe adapted to the upper port is fixedly embedded on the lower side of the negative pressure chamber, and the upper end face of the maintenance chamber and the lower side of the negative pressure chamber are fixed with screws.

[0011] As a further embodiment of this utility model, a lower port is provided on the lower end face of the maintenance chamber, and an air inlet pipe adapted to the lower port is fixedly embedded on the upper side of the air inlet chamber, and the lower end face of the maintenance chamber is fixed with screws at the part that contacts the upper side of the air inlet chamber.

[0012] As a further embodiment of this utility model, an air distribution plate is fixedly embedded between the upper and lower inner walls of the maintenance compartment. The two air distribution plates are arranged parallel to each other, and each air distribution plate is densely covered with air holes. A door is hinged to one side of the maintenance compartment, and a high-voltage frequency converter body is installed on the inner wall of the maintenance compartment between the two air distribution plates.

[0013] As a further embodiment of this utility model, a plurality of air inlet slots are provided on one side of the air inlet chamber, and universal wheels are installed at the four corners of the bottom of the air inlet chamber, and wheel brakes are installed on the universal wheels.

[0014] As a further embodiment of this utility model, two hook plates are fixed on one side of the outer wall of the maintenance compartment, and a through groove corresponding to the two hook plates is opened on the other side of the maintenance compartment. The limiting member overlaps between the two hook plates, and a limiting part is provided on the lower side of both ends of the limiting member.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model discloses a combined high-voltage frequency converter, in which each frequency converter box is an independent standardized unit, including a maintenance compartment and a negative pressure compartment connected to the maintenance compartment. These independent standardized units are connected in sequence to form a whole. Adjacent negative pressure compartments are connected by inserting a second connecting pipe into a first connecting pipe. When the fan is running, cold air passes through the air inlet slot, air inlet compartment, maintenance compartment and negative pressure compartment of each frequency converter box in sequence to remove heat, so that multiple frequency converter boxes can work together without affecting each other. There is no need to set up a separate heat dissipation system on each high-voltage frequency converter, which reduces manufacturing and operating costs.

[0017] This utility model discloses a modular high-voltage frequency converter. When connecting standardized units, the hook plate of each frequency converter box is interlocked with the through slot of the adjacent frequency converter box. The limiting member overlaps between the hook plates to prevent the hook plates from coming off in the opposite direction. This makes it convenient and quick to combine multiple frequency converter boxes. The modular design also improves the expandability and flexibility of the equipment. Users can increase or decrease the number of frequency converter boxes at any time according to actual needs to meet different power and application scenario requirements. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 This is an external view of a combined high-voltage frequency converter according to the present invention;

[0020] Figure 2 This is a structural exploded view of the frequency converter box in a combined high-voltage frequency converter according to this utility model;

[0021] Figure 3 This is an internal structural diagram of the maintenance compartment in a combined high-voltage frequency converter according to this utility model;

[0022] Figure 4 This is a diagram showing the internal structure of the negative pressure chamber in a combined high-voltage frequency converter according to this utility model.

[0023] Figure 5 This is a schematic diagram showing the cooperation between the hook plate and the limiting component in a combined high-voltage frequency converter according to this utility model.

[0024] The components represented by each number in the attached diagram are listed below: 1. Fan; 2. Ventilation duct; 3. Variable frequency box; 31. Air inlet chamber; 311. Air inlet duct; 312. Air inlet slot; 313. Casters; 32. Maintenance compartment; 321. Upper port; 322. Air distribution plate; 323. Box door; 325. Hook plate; 326. Through slot; 327. Lower port; 328. Air vent; 329. High-voltage variable frequency drive body; 33. Negative pressure chamber; 331. First connecting pipe; 332. Second connecting pipe; 333. Valve plate; 334. Negative pressure pipe; 4. Limiting component; 41. Limiting part. Detailed Implementation

[0025] The present invention will be further described below with reference to the embodiments.

[0026] Please see Figure 1-5 This utility model provides a combined high-voltage frequency converter, including a fan 1, a ventilation pipe 2, a frequency converter box 3, and a limiting component 4. The frequency converter box 3 includes an air inlet chamber 31, a maintenance chamber 32, and a negative pressure chamber 33. An air distribution plate 322 is fixedly embedded between the upper and lower inner walls of the maintenance chamber 32. The two air distribution plates 322 are arranged parallel to each other, and each air distribution plate 322 is densely covered with air holes 328. A door 323 is hinged to one side of the maintenance chamber 32. A high-voltage frequency converter body 329 is installed on the inner wall of the maintenance chamber 32 and located between the two air distribution plates 322.

[0027] Specifically, the air distribution plate 322 is densely covered with air holes 328. The function of the air holes 328 is to evenly distribute the cold air entering the maintenance chamber 32 throughout the chamber. The cold air can flow evenly over the surface of the high-voltage frequency converter body 329, thereby improving the heat dissipation efficiency. The design of the door 323 allows maintenance personnel to easily enter the maintenance chamber 32 to maintain and repair the high-voltage frequency converter body 329, improving the maintainability of the equipment. Closing the door 323 can prevent the high-voltage frequency converter body 329 from being contaminated by dust.

[0028] Furthermore, multiple frequency converter boxes 3 are arranged in sequence, and adjacent frequency converter boxes 3 are connected into an integral structure by limiting members 4. Two hook plates 325 are fixed on one outer wall of the maintenance compartment 32, and a through groove 326 corresponding to the two hook plates 325 is opened on the other side of the maintenance compartment 32. The limiting member 4 overlaps between the two hook plates 325, and limiting parts 41 are provided on the lower sides of both ends of the limiting member 4.

[0029] Specifically, the shape and size of the through groove 326 are adapted to the hook plate 325 to accommodate the hook plate 325 of the adjacent frequency converter box 3. The hook plate 325 has an "L" shaped structure design. After it passes through the through groove 326, a gap with the same thickness as the limiting member 4 is formed between the side wall of the hook plate 325 and the inner wall of the maintenance compartment 32. The limiting member 4 is embedded into the gap from top to bottom to prevent the hook plate 325 from moving in the opposite direction. The limiting part 41 can prevent the limiting member 4 from moving back and forth, and avoid the loosening path of the limiting member 4 and the hook plate 325 from being misaligned, so as to ensure that the adjacent frequency converter box 3 can be fully fixed as one. When the limiting member 4 is lifted upward, the hook plate 325 can be dislodged from the through groove 326 of the adjacent frequency converter box 3, and the adjacent frequency converter box 3 can be separated.

[0030] Furthermore, a negative pressure chamber 33 and an air inlet chamber 31 are respectively installed on the upper and lower end faces of the maintenance chamber 32. An upper port 321 is opened on the upper end face of the maintenance chamber 32. A negative pressure pipe 334 adapted to the upper port 321 is fixedly embedded on the lower side of the negative pressure chamber 33. The upper end face of the maintenance chamber 32 and the lower side of the negative pressure chamber 33 are fixed with screws at the contact points.

[0031] Specifically, during operation, the upper port 321 provides a channel for hot air to exit from the maintenance chamber 32, ensuring that the hot air can smoothly enter the negative pressure chamber 33. During assembly, the negative pressure pipe 334 is inserted into the lower port 327 to ensure that the maintenance chamber 32 and the negative pressure chamber 33 are aligned. Perforations are provided at the four corners of the bottom of the maintenance chamber 32, and screw holes are provided at the four corners of the upper side of the negative pressure chamber 33. By passing screws through the perforations and engaging with the screw threads, the connection between the negative pressure chamber 33 and the maintenance chamber 32 can be ensured to be stable.

[0032] Furthermore, the first-end frequency converter box 3 is connected to a fan 1 through a ventilation pipe 2. The fan 1 is located directly above the first-end frequency converter box 3, and a ventilation pipe 2 is sleeved between the input end of the fan 1 and the adjacent first connecting pipe 331.

[0033] Specifically, the ventilation duct 2 connects the input end of the fan 1 to the negative pressure chamber 33 of the first-end frequency converter box 3, ensuring that the airflow can smoothly enter the fan 1 from the negative pressure chamber 33, and a negative pressure environment can be formed in the negative pressure chamber 33.

[0034] Furthermore, a lower port 327 is provided on the lower end face of the maintenance chamber 32, and an air inlet pipe 311 adapted to the lower port 327 is fixedly embedded on the upper side of the air inlet chamber 31, and the lower end face of the maintenance chamber 32 is fixed with screws at the part that contacts the upper side of the air inlet chamber 31.

[0035] Specifically, during operation, the air inlet pipe 311 guides the cold air in the air inlet chamber 31 to the lower port 327 of the maintenance chamber 32, ensuring that the airflow can smoothly enter the maintenance chamber 32. During assembly, the air inlet pipe 311 is inserted into the lower port 327 to ensure that the maintenance chamber 32 is aligned with the air inlet chamber 31. Through holes are provided at the four corners of the bottom of the maintenance chamber 32, and screw holes are provided at the four corners of the upper side of the air inlet chamber 31. The screws are passed through the through holes and threaded into the screw holes to ensure a stable connection between the air inlet chamber 31 and the maintenance chamber 32.

[0036] Furthermore, a first connecting pipe 331 is fixedly embedded on one side of the outer wall of the negative pressure chamber 33, and a second connecting pipe 332 is fixedly embedded on the other side of the inner wall of the negative pressure chamber 33, wherein the outer diameter of the first connecting pipe 331 is adapted to the inner diameter of the second connecting pipe 332.

[0037] Specifically, the matching design of the first connecting pipe 331 and the second connecting pipe 332 ensures that the airflow can flow seamlessly from the negative pressure chamber 33 of one frequency converter 3 to the negative pressure chamber 33 of the next frequency converter 3, forming a continuous airflow channel. Each negative pressure chamber 33 of the frequency converter 3 is equipped with the same specifications of the first connecting pipe 331 and the second connecting pipe 332, so that the frequency converter 3 can be combined as standardized modules.

[0038] Furthermore, the length of the first connecting pipe 331 is greater than the length of the second connecting pipe 332, and a valve plate 333 is hinged to the upper side of the end of the second connecting pipe 332 away from the inner wall of the negative pressure chamber 33.

[0039] Specifically, when the first connecting pipe 331 is inserted into the second connecting pipe 332, the first connecting pipe 331 will push the valve plate 333 to open automatically, allowing airflow to pass smoothly. However, the valve plate 333 of the last inverter box 3 cannot be opened, thus ensuring that outside air cannot pass smoothly through the valve plate 333. This ensures that sufficient negative pressure can be formed in the negative pressure chamber 33 to ensure the heat dissipation capacity of each inverter box 3. It is worth noting that multiple magnets are fixedly embedded inside the part where the valve plate 333 contacts the end face of the second connecting pipe 332. Through the magnetic attraction between the magnets and the second connecting pipe 332, it can be ensured that the valve plate 333 will not open due to the negative pressure during operation.

[0040] Furthermore, a plurality of air inlet slots 312 are provided on one side of the air inlet chamber 31, and universal wheels 313 are installed at the four corners of the bottom of the air inlet chamber 31, and wheel brakes are installed on the universal wheels 313.

[0041] Specifically, the air inlet slot 312 allows outside cold air to smoothly enter the air inlet chamber 31. The air inlet slot 312 is designed in a circular, strip, or rectangular shape. Multiple air inlet slots 312 arranged in parallel can ensure that cold air enters the air inlet chamber 31 evenly, avoid local airflow obstruction, and thus improve the efficiency of the entire heat dissipation system.

[0042] Specifically, the installation of the casters 313 allows the frequency converter 3 to move easily between different positions, facilitating the installation, commissioning, and maintenance of the equipment. Especially when multiple frequency converters 3 need to be combined or disassembled, the casters 313 can greatly save manpower and time. After the frequency converter 3 is installed in place, the casters 313 can be fixed by stepping on the wheel brakes to prevent the frequency converter 3 from moving due to external forces or vibrations during operation, thus ensuring the stable operation of the equipment.

[0043] Working principle: In use, first suspend the fan 1 from the top of the control room. After positioning the first frequency converter box 3 below the fan 1, nest the ventilation pipe 2 between the input end of the fan 1 and the first connecting pipe 331. Then, push the second frequency converter box 3 until it is close to the first frequency converter box 3. The first connecting pipe 331 of the second frequency converter box 3 is embedded in the second connecting pipe 332 of the first frequency converter box 3. The first connecting pipe 331 can push the valve plate 333 inside the first frequency converter box 3 to open. At the same time, the hook plate 325 of the second frequency converter box 3 is embedded in the through groove 326 of the first frequency converter box 3. A limiting member 4 is set between the two hook plates 325 to prevent the two frequency converter boxes 3 from separating. This process is repeated. The continuous installation of the subsequent frequency converter box 3 can be completed. When in use, the fan 1 draws air from the negative pressure chamber 33 through the ventilation pipe 2, thereby creating a negative pressure in multiple connected negative pressure chambers 33. Under the action of the air pressure difference inside and outside the frequency converter box 3, the outside cold air enters the air inlet chamber 31 from the air inlet slot 312 of each frequency converter box 3, and then enters the maintenance chamber 32 through the air inlet pipe 311. The cold air passes through the two air distribution plates 322 from bottom to top. In this process, it can remove the operating heat of the high voltage frequency converter body 329, so that the high voltage frequency converter body 329 is fully cooled down. The heat-exchanged air is replenished into the negative pressure chamber 33 through the negative pressure pipe 334, which can realize the heat dissipation coordination of multiple high voltage frequency converter bodies 329.

Claims

1. A combined high-voltage frequency converter, characterized in that, Includes a fan (1), a ventilation duct (2), a frequency converter box (3) and a limiting member (4). Multiple frequency converter boxes (3) are arranged in sequence. Adjacent frequency converter boxes (3) are connected to each other as an integral structure through the limiting member (4). The first frequency converter box (3) is connected to the fan (1) through the ventilation duct (2). The inverter box (3) includes an air inlet chamber (31), a maintenance chamber (32), and a negative pressure chamber (33). The negative pressure chamber (33) and the air inlet chamber (31) are respectively installed on the upper and lower end faces of the maintenance chamber (32). A first connecting pipe (331) is fixedly embedded on one outer wall of the negative pressure chamber (33), and a second connecting pipe (332) is fixedly embedded on the other inner wall of the negative pressure chamber (33). The outer diameter of the first connecting pipe (331) is adapted to the inner diameter of the second connecting pipe (332). The length of the first connecting pipe (331) is greater than the length of the second connecting pipe (332), and a valve plate (333) is hinged to the upper side of the end of the second connecting pipe (332) away from the inner wall of the negative pressure chamber (33).

2. The combined high-voltage frequency converter according to claim 1, characterized in that: The fan (1) is located directly above the first-end frequency converter box (3), and a ventilation pipe (2) is sleeved between the input end of the fan (1) and the adjacent first connecting pipe (331).

3. A combined high-voltage frequency converter according to claim 1, characterized in that: The maintenance chamber (32) has an upper port (321) on its upper end face. The negative pressure chamber (33) has a negative pressure pipe (334) that is compatible with the upper port (321) fixedly embedded on its lower side. The upper end face of the maintenance chamber (32) is fixed with screws at the part that contacts the lower side of the negative pressure chamber (33).

4. A combined high-voltage frequency converter according to claim 1, characterized in that: The maintenance chamber (32) has a lower port (327) on its lower end face. An air inlet pipe (311) that is compatible with the lower port (327) is fixedly embedded on the upper side of the air inlet chamber (31). The lower end face of the maintenance chamber (32) is fixed with screws at the part that contacts the upper side of the air inlet chamber (31).

5. A combined high-voltage frequency converter according to claim 1, characterized in that: An air distribution plate (322) is fixedly embedded between the upper and lower inner walls of the maintenance chamber (32). The two air distribution plates (322) are arranged parallel to each other, and each air distribution plate (322) is densely covered with air holes (328). A door (323) is hinged to one side of the maintenance chamber (32). A high-voltage frequency converter body (329) is installed on the inner wall of the maintenance chamber (32) between the two air distribution plates (322).

6. A combined high-voltage frequency converter according to claim 1, characterized in that: The air intake chamber (31) has multiple air intake slots (312) on one side, and universal wheels (313) are installed at the four corners of the bottom of the air intake chamber (31), and wheel brakes are installed on the universal wheels (313).

7. A combined high-voltage frequency converter according to claim 1, characterized in that: Two hook plates (325) are fixed on one side of the outer wall of the maintenance compartment (32). A through groove (326) corresponding to the two hook plates (325) is opened on the other side of the maintenance compartment (32). The limiting member (4) overlaps between the two hook plates (325). A limiting part (41) is provided on the lower side of both ends of the limiting member (4).

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