Cooling device of high-voltage frequency converter

Abstract

The utility model discloses a cooling device for a high-voltage frequency converter, which relates to the technical field of high-voltage frequency converters and comprises a supporting seat and a protection box, a box door is hinged to one side of the protection box, a plurality of heat dissipation grooves are formed in the box door, the protection box is mounted on the upper side of the supporting seat, a ventilation flow channel is formed between the supporting seat and the protection box, and the ventilation flow channel is communicated with the box door. A fine screen plate and a plurality of brushless fans are arranged in the ventilation flow channel in a limiting mode, the brushless fans operate to extract cold air, the cold air enters the pressurization area after being filtered layer by layer through the coarse screen plate and the fine screen plate, and a high-air-pressure environment is formed on one side of the air distribution plate. Cold air uniformly enters an equipment area through the air holes in the air distribution plate under the action of air pressure difference to exchange heat with the high-voltage frequency converter body, the cold air can be fully contacted with the high-voltage frequency converter body, the ventilation cross section is large, heat dissipation dead angles are reduced, the heat dissipation grooves provide smooth discharge channels for air after heat exchange, heat accumulation in the protection box can be avoided, and the service life of the high-voltage frequency converter is prolonged. And the heat dissipation effect is improved.

Description

Technical Field

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

[0002] A high-voltage frequency converter is a type of power electronic device. Its core components mainly include power devices (such as IGBTs, MOSFETs, etc.), reactors, capacitors, etc. During operation, these components generate Joule heat (i.e., resistance loss) when current flows through them. At the same time, the power devices also generate switching losses during the switching process. All of these losses are ultimately converted into heat, causing the equipment temperature to rise.

[0003] Chinese Patent Publication No. CN219499897U discloses a cooling device for a high-voltage, high-power frequency converter, comprising: a base, a mounting bracket fixedly mounted on the top of the base, heat dissipation holes on the outside of the mounting bracket, a mounting plate fixedly mounted inside the mounting bracket, and multiple fans equidistantly embedded in the top of the mounting plate; and a first condensing chamber fixedly mounted on the top of the base and on the outer side of the mounting bracket. This invention uses a water pump inside the first condensing chamber to guide condensate into a first condensing pipe, which effectively lowers the temperature of the surrounding air and cools the fans. The fans effectively blow the cooled air into the interior of the protective shell through ventilation holes, effectively cooling the internal equipment. The heat dissipation holes ensure airflow at the bottom of the mounting bracket, preventing interference with the fan operation and allowing for rapid cooling of the interior of the protective shell.

[0004] The airflow in the above-mentioned technology flows from bottom to top. Due to the small ventilation cross-section, there are many heat dissipation dead corners for high-voltage frequency converters with complex equipment layouts. The contact area between the airflow and the equipment is limited, and the heat dissipation effect is restricted. Therefore, this utility model discloses a high-voltage frequency converter cooling device to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a cooling device for high-voltage frequency converters to solve the technical problems mentioned in the background art. The airflow of the traditional high-voltage frequency converter heat dissipation system flows from bottom to top. Due to the small ventilation cross section, for high-voltage frequency converters with complex equipment layout, there are many heat dissipation dead corners, the contact area between airflow and equipment is limited, and the heat dissipation effect is limited.

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

[0007] A high-voltage frequency converter cooling device includes a support base and a protective box. A door is hinged to one side of the protective box, and multiple heat dissipation slots are provided on the door. The protective box is installed on the upper side of the support base, and a ventilation channel is formed between the support base and the protective box. A fine mesh plate and multiple brushless fans are limited and arranged inside the ventilation channel. A coarse mesh plate is fixedly embedded on the protective box on the side of the fine mesh plate away from the brushless fans. An air distribution plate is installed inside the protective box, wherein the air distribution plate divides the inside of the protective box into a pressurization area and an equipment area, and the ventilation channel and the pressurization area are connected.

[0008] As a further embodiment of this utility model, a wind baffle is provided on one side of the inner wall of the protective box, and a gap is formed between the other side of the inner wall of the protective box and the wind baffle to connect the ventilation channel and the pressurization area.

[0009] As a further embodiment of this utility model, the upper side of the support base is provided with a receiving groove, the receiving groove is adapted to the protective box, and the adjacent side walls of the support base and the protective box are fixed with screws.

[0010] As a further embodiment of this utility model, a first lower clamping plate is fixedly connected to the inner bottom wall of the receiving groove, and a first upper clamping plate is fixed to the lower side of the wind baffle plate corresponding to the first lower clamping plate. Multiple first receiving positions are provided on the adjacent sides of the first lower clamping plate and the first upper clamping plate, and a brushless fan is limited between adjacent first receiving positions.

[0011] As a further embodiment of this utility model, a second lower clamping plate is fixedly connected to the inner bottom wall of the receiving groove, and a second upper clamping plate is fixed to the lower side of the wind baffle plate corresponding to the second lower clamping plate. A second receiving position is opened on the adjacent side of the second lower clamping plate and the second upper clamping plate, and a fine mesh plate is provided between the two second receiving positions.

[0012] As a further embodiment of this utility model, the air distribution plate is densely covered with air holes, the air distribution plate is fixed between the wind baffle and the inner wall of the protective box, and multiple support legs are fixed on the side of the air distribution plate facing the equipment area, with the high-voltage frequency converter body fixed between the multiple support legs by screws.

[0013] As a further embodiment of this utility model, the protective box has a ventilation slot on one side of the receiving groove, and the ventilation slot is positioned opposite the coarse mesh plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model discloses a cooling device for a high-voltage frequency converter. A brushless fan draws in cool air, which is then filtered through coarse and fine mesh plates before entering the pressurization zone. A high-pressure environment is formed on one side of the air distribution plate. Under the action of the air pressure difference, the cool air enters the equipment area evenly through the air holes on the air distribution plate to exchange heat with the high-voltage frequency converter body. The cool air can fully contact the high-voltage frequency converter body, and the large ventilation cross section reduces heat dissipation dead corners. The heat dissipation slots provide a smooth exhaust channel for the air after heat exchange, which can prevent heat from accumulating in the protective box and improve the heat dissipation effect.

[0016] This utility model discloses a cooling device for a high-voltage frequency converter. When the brushless fan malfunctions or the fine mesh plate needs cleaning, the screws between the support base and the protective box can be removed, allowing the protective box to be directly pulled out of the receiving slot. This exposes the fine mesh plate and the brushless fan, simplifying the disassembly and assembly process of the high-voltage frequency converter and greatly improving maintenance efficiency. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 This is a front view of a high-voltage frequency converter cooling device according to the present invention;

[0019] Figure 2 This is a side sectional view of a high-voltage frequency converter cooling device according to the present invention;

[0020] Figure 3 This is a front cross-sectional view of a high-voltage frequency converter cooling device according to the present invention. Figure 1 ;

[0021] Figure 4 This is a front cross-sectional view of a high-voltage frequency converter cooling device according to the present invention. Figure 2 ;

[0022] Figure 5 This is a side sectional view of the support base in a high-voltage frequency converter cooling device according to the present invention.

[0023] The components represented by each number in the attached diagram are listed below: 1. Support base; 11. Receiving groove; 12. First lower clamping plate; 13. Second lower clamping plate; 2. Protective box; 21. Box door; 211. Heat dissipation groove; 22. Wind baffle; 221. First upper clamping plate; 222. Second upper clamping plate; 23. Ventilation groove; 3. Fine mesh plate; 4. Brushless fan; 5. Coarse mesh plate; 6. Air distribution plate; 61. Air hole; 62. Support leg; 63. High voltage frequency converter body; 7. Ventilation channel; 8. Pressurization area; 9. Equipment area. Detailed Implementation

[0024] The present invention will be further described below with reference to the embodiments.

[0025] Please see Figure 1-5 This utility model provides a cooling device for a high-voltage frequency converter, including a support base 1 and a protective box 2. The protective box 2 is installed on the upper side of the support base 1. A ventilation channel 7 is formed between the support base 1 and the protective box 2. A fine mesh plate 3 and a plurality of brushless fans 4 are limited and arranged in the ventilation channel 7. A receiving groove 11 is provided on the upper side of the support base 1. The receiving groove 11 is adapted to the protective box 2, and the adjacent side walls of the support base 1 and the protective box 2 are fixed with screws.

[0026] Specifically, the shape and size of the receiving groove 11 are adapted to the protective box 2, ensuring that the protective box 2 can be accurately embedded in the receiving groove 11, reducing installation gaps, and improving the integrity and sealing of the device. On the other hand, the protective box 2 has multiple screw holes on its side wall, and the support base 1 has countersunk grooves on its side corresponding to the screw holes. The screws can be screwed into the screw holes through the countersunk grooves to realize the assembly of the support base 1 and the protective box 2. Preferably, a circulating water cooling pipe is installed in the middle of the receiving groove 11 and connected to an external water cooling system, which can further reduce the temperature of the cold air and improve the air cooling effect.

[0027] Furthermore, a first lower clamping plate 12 is fixedly connected to the inner bottom wall of the receiving groove 11, and a first upper clamping plate 221 is fixed to the lower side of the wind baffle 22 corresponding to the first lower clamping plate 12. Multiple first receiving positions are opened on the adjacent sides of the first lower clamping plate 12 and the first upper clamping plate 221, and a brushless fan 4 is limited between adjacent first receiving positions.

[0028] Specifically, the main function of the brushless fan 4 is to draw in outside cold air, which passes through the coarse mesh plate 5 and the fine mesh plate 3 in sequence. After being filtered, the cold air enters the pressurization zone 8 and, under the action of air pressure difference, enters the equipment area 9 evenly through the air holes 61 on the air distribution plate 6 to exchange heat with the high-voltage frequency converter body 63, thereby achieving efficient heat dissipation. On the other hand, the first receiving position is a recessed structure, and the middle area of ​​the front and rear sides of the recessed structure is provided with through slots. The two recessed structures together form a space that matches the outer contour of the brushless fan 4, so that the brushless fan 4 is fully limited. At the same time, the air intake channel of the brushless fan 4 is exposed in the through slot, allowing the airflow to pass smoothly. After the support base 1 and the protective box 2 are separated, the brushless fan 4 can be directly taken out for maintenance or replacement, simplifying the disassembly and assembly process of the brushless fan 4 and greatly improving maintenance efficiency.

[0029] Furthermore, a second lower clamping plate 13 is fixedly connected to the inner bottom wall of the receiving groove 11, and a second upper clamping plate 222 is fixed to the lower side of the wind baffle 22 corresponding to the second lower clamping plate 13. A second receiving position is opened on the adjacent side of the second lower clamping plate 13 and the second upper clamping plate 222, and a fine mesh plate 3 is provided between the two second receiving positions.

[0030] Specifically, the main function of the fine mesh plate 3 is to filter fine dust and impurities in the air. When the brushless fan 4 is running, the cold air passes through the coarse mesh plate 5 for initial filtration, and then through the fine mesh plate 3 for secondary filtration. The mesh size of the fine mesh plate 3 is much smaller than that of the coarse mesh plate 5, which can further purify the air and ensure that the air entering the pressurization area 8 is cleaner, reducing dust pollution to the high-voltage inverter body 63. On the other hand, the second receiving position is a recessed structure, and the middle area of ​​the front and rear sides of the recessed structure is provided with through grooves. The two recessed structures together form a space that matches the outer contour of the fine mesh plate 3, so that the fine mesh plate 3 is fully limited. At the same time, the middle part of the fine mesh plate 3 is exposed in the through groove, allowing the airflow to pass smoothly. After the support base 1 and the protective box 2 are separated, the fine mesh plate 3 can be directly removed for cleaning, simplifying the disassembly and assembly process of the fine mesh plate 3 and greatly improving the cleaning efficiency.

[0031] Furthermore, a coarse mesh plate 5 is fixedly embedded on the protective box 2 on the side of the fine mesh plate 3 away from the brushless fan 4, and a ventilation slot 23 is opened on the side of the protective box 2 located in the receiving slot 11, and the ventilation slot 23 is positioned opposite the coarse mesh plate 5.

[0032] Specifically, the ventilation slot 23 provides a channel for cold air to enter the interior of the protective box 2. The cold air entering the protective box 2 will first pass through the coarse mesh plate 5 for preliminary filtration. The coarse mesh plate 5 can block larger dust particles and impurities, and also plays a role in protecting the internal structure of the protective box 2.

[0033] Furthermore, an air distribution plate 6 is installed inside the protective box 2. The air distribution plate 6 is densely covered with air holes 61. The air distribution plate 6 is fixed between the wind baffle 22 and the inner wall of the protective box 2. Multiple support legs 62 are fixed on the side of the air distribution plate 6 facing the equipment area 9. A high-voltage frequency converter body 63 is screwed between the multiple support legs 62.

[0034] Specifically, the vent 61 is designed in a circular, strip, or rectangular shape. The function of the vent 61 is to evenly distribute the cold air that has passed through the pressurization zone 8 into the equipment zone 9. It is worth noting that the design of the size of the vent 61 gradually increasing from the bottom of the air distribution plate 6 upwards, or the design of the density of the vent 61 gradually decreasing from the bottom of the air distribution plate 6 upwards, both are conducive to the even distribution of cold air into the equipment zone 9. The support leg 62 not only supports the high-voltage frequency converter body 63, but also provides space for the flow of cold air, so that the cold air can smoothly enter the equipment zone 9, ensuring that all parts of the high-voltage frequency converter body 63 can fully contact the cold air, reducing heat dissipation dead zones and improving heat dissipation efficiency.

[0035] Furthermore, the air distribution plate 6 divides the interior of the protective box 2 into a pressurization area 8 and an equipment area 9, and the ventilation channel 7 and the pressurization area 8 are connected. A baffle plate 22 is provided on one side of the inner wall of the protective box 2, and a gap is formed between the other side of the inner wall of the protective box 2 and the baffle plate 22 to connect the ventilation channel 7 and the pressurization area 8.

[0036] Specifically, the baffle plate 22 is designed so that after the airflow enters the protective box 2, it can flow along a predetermined path, first passing through the coarse mesh plate 5 and the fine mesh plate 3 for filtration, and then entering the pressurization area 8 through the gap, causing the air pressure on one side of the air distribution plate 6 to rise sharply.

[0037] Furthermore, a door 21 is hinged to one side of the protective box 2, and multiple heat dissipation slots 211 are provided on the door 21;

[0038] Specifically, the main function of the door 21 is to protect the components inside the protective box 2 and prevent dust, impurities and external interference from entering the cooling device. It also provides a convenient maintenance access. The main function of the heat dissipation slot 211 is to provide an exhaust channel for the hot air after heat exchange. It is worth noting that the door 21 is located directly opposite the air distribution plate 6, so that the cold air entering evenly from the air distribution plate 6 can flow in a near-straight line, reducing the flow path of the cold air in the equipment area 9, thereby making full use of the cold energy of the cold air to ensure the heat exchange capacity.

[0039] Working principle:

[0040] When in use, the brushless fan 4 operates, drawing in outside cold air that passes through the coarse mesh plate 5 and the fine mesh plate 3 in sequence. This allows the dust particles carried by the cold air to be filtered and purified layer by layer. The purified cold air enters the pressurization zone 8 through the gap, creating a high-pressure environment on one side of the air distribution plate 6. Under the action of the air pressure difference, the airflow enters the equipment area 9 through the air hole 61 and exchanges heat with the operating high-voltage frequency converter body 63. The air after heat exchange is discharged outward from the heat dissipation slot 211 under the action of the airflow, which can carry away the operating heat of the high-voltage frequency converter body 63 and ensure the safe operation of the high-voltage frequency converter body 63.

Claims

1. A cooling device for a high-voltage frequency converter, comprising a support base (1) and a protective enclosure (2), wherein a door (21) is hinged to one side of the protective enclosure (2), and a plurality of heat dissipation slots (211) are provided on the door (21), characterized in that, A protective box (2) is installed on the upper side of the support base (1). A ventilation channel (7) is formed between the support base (1) and the protective box (2). A fine mesh plate (3) and a plurality of brushless fans (4) are limited in the ventilation channel (7). A coarse mesh plate (5) is fixedly embedded on the protective box (2) on the side of the fine mesh plate (3) away from the brushless fans (4). An air distribution plate (6) is installed in the protective box (2). The air distribution plate (6) divides the protective box (2) into a pressurization area (8) and an equipment area (9). The ventilation channel (7) and the pressurization area (8) are connected.

2. The high-voltage frequency converter cooling device according to claim 1, characterized in that: The inner wall of one side of the protective box (2) is provided with a wind baffle (22), and a gap is formed between the inner wall of the other side of the protective box (2) and the wind baffle (22) to connect the ventilation channel (7) and the pressurization area (8).

3. The high-voltage frequency converter cooling device according to claim 2, characterized in that: The upper side of the support base (1) is provided with a receiving groove (11), which is adapted to the protective box (2), and the adjacent side walls of the support base (1) and the protective box (2) are fixed with screws.

4. The high-voltage frequency converter cooling device according to claim 3, characterized in that: A first lower clamping plate (12) is fixedly connected to the inner bottom wall of the receiving groove (11). A first upper clamping plate (221) is fixed to the lower side of the baffle plate (22) corresponding to the first lower clamping plate (12). Multiple first receiving positions are opened on the adjacent sides of the first lower clamping plate (12) and the first upper clamping plate (221), and a brushless fan (4) is limited between adjacent first receiving positions.

5. A high-voltage frequency converter cooling device according to claim 3, characterized in that: A second lower clamping plate (13) is fixedly connected to the inner bottom wall of the receiving groove (11). A second upper clamping plate (222) is fixed to the lower side of the wind baffle (22) corresponding to the second lower clamping plate (13). A second receiving position is opened on the adjacent side of the second lower clamping plate (13) and the second upper clamping plate (222), and a fine mesh plate (3) is provided between the two second receiving positions.

6. The high-voltage frequency converter cooling device according to claim 1, characterized in that: The air distribution plate (6) is densely covered with air holes (61). The air distribution plate (6) is fixed between the wind baffle (22) and the inner wall of the protective box (2). Multiple support legs (62) are fixed on the side of the air distribution plate (6) facing the equipment area (9). The high voltage frequency converter body (63) is fixed between the multiple support legs (62) with screws.

7. A high-voltage frequency converter cooling device according to claim 1, characterized in that: The protective box (2) has a ventilation slot (23) on one side inside the receiving slot (11), and the ventilation slot (23) is positioned opposite the coarse mesh plate (5).

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