Heat dissipation air-water cooling system of high-voltage frequency converter

Abstract

The utility model provides a heat dissipation air-water cooling system of a high-voltage frequency converter. The heat dissipation air-water cooling system comprises a frequency converter chamber, the high-voltage frequency converter, an air-water cooling unit and a circulating unit, a partition plate is arranged at the top of the high-voltage frequency converter in the frequency converter chamber and divides the interior of the frequency converter chamber into an upper-layer hot air area and a lower-layer cold air area; the air-water cooling unit comprises a hot air pipe and an air-water cooler, one end of the hot air pipe is communicated with the side wall of the hot air area, and the other end of the hot air pipe is communicated with a hot air inlet of the air-water cooler; the circulating unit comprises a cold air pipe and an axial flow fan, one end of the cold air pipe is communicated with a cold air outlet of the air-water cooler, the other end of the cold air pipe is communicated with the side wall of the cold air area, and the axial flow fan is communicated with the cold air pipe. According to the high-voltage frequency converter, the effect of cooling heat dissipated during operation of the high-voltage frequency converter is achieved, and the cleanliness of the operation environment of the high-voltage frequency converter is improved.

Description

Technical Field

[0001] This application relates to the field of high-voltage frequency converter heat dissipation technology, and in particular to a high-voltage frequency converter heat dissipation air-water cooling system. Background Technology

[0002] High-voltage frequency converters use a large number of high-power power electronic components, filter support capacitors, and electronic devices, which generate a lot of heat. Excessively high ambient temperature not only affects the reliability of equipment operation, but also affects the service life of the equipment and increases operation and maintenance costs. Therefore, controlling the operating ambient temperature of the frequency converter is very important.

[0003] The original high-voltage frequency converter used an evaporative cooling system for cooling, where hot air was exhausted outdoors through ducts while the evaporative cooling system cooled the indoor air. This method was not very effective at dissipating heat; in summer, the frequency converter room still maintained temperatures above 35°C, which could damage internal components over time. Secondly, the evaporative cooling system would bring dust into the room, causing dust to easily clog the frequency converter cabinet filters, leading to overheating of the frequency converter power units, damage to insulated-gate bipolar transistors (IGBTs), and equipment shutdowns, seriously affecting the normal operation of the generator set. Utility Model Content

[0004] This application provides a high-voltage frequency converter heat dissipation air-water cooling system to solve the problems mentioned in the background art.

[0005] This application provides a high-voltage frequency converter heat dissipation air-water cooling system, including a frequency converter chamber, a high-voltage frequency converter, an air-water cooling unit, and a circulation unit;

[0006] The high-voltage frequency converter is located inside the frequency converter room. A partition is installed on top of the high-voltage frequency converter in the frequency converter room, which divides the frequency converter room into an upper hot air zone and a lower cold air zone.

[0007] The air-water cooling unit includes a hot air duct and an air-water cooler. One end of the hot air duct is connected to the side wall of the hot air zone, and the other end of the hot air duct is connected to the hot air inlet of the air-water cooler.

[0008] The circulation unit includes a cold air duct and an axial flow fan. One end of the cold air duct is connected to the cold air outlet of the air-water cooler, and the other end of the cold air duct is connected to the side wall of the cold air zone. The axial flow fan is connected to the cold air duct.

[0009] Optionally, a fan may be installed inside the hot air duct.

[0010] Optionally, a filter screen is installed between the cold air duct and the cold air outlet of the air-water cooler.

[0011] Optionally, an activated carbon layer is installed inside the cold air duct between the filter and the outlet of the cold air duct.

[0012] Optionally, the end of the cold air duct that connects to the side wall of the cold air zone is also connected to a first cold air branch duct, a second cold air branch duct, and a main cold air duct.

[0013] Optionally, the first cold air branch pipe and the second cold air branch pipe are arranged along the inner periphery of the side wall of the inverter room, and pressurized nozzles are installed on both the first cold air branch pipe and the second cold air branch pipe.

[0014] Optionally, the air-water cooler is connected to a cooling water inlet pipe and a cooling water outlet pipe. The cooling water inlet pipe is equipped with an inlet valve and a thermometer, and the cooling water outlet pipe is equipped with an outlet valve.

[0015] Optionally, an inlet pressure gauge is installed on the cooling water inlet pipe, and an outlet pressure gauge is installed on the cooling water outlet pipe.

[0016] The high-voltage frequency converter heat dissipation air-water cooling system provided in this application achieves the effect of cooling the heat dissipated during the operation of the high-voltage frequency converter, and has the following advantages compared with the prior art:

[0017] (1) The internal space of the inverter room is divided into a hot air zone and a cold air zone by a partition, so that the hot air zone has ample space for heat dissipation, reducing the phenomenon of hot air blockage and uneven heat dissipation, greatly improving the heat dissipation efficiency, and thus ensuring that the high-voltage inverter is always at a suitable operating temperature, so that the high-voltage inverter can operate stably for a long period of time. By transporting the hot air in the hot air zone to the air-water cooling unit, the cold water exchanges heat with the hot air from the hot air duct. After the hot air is cooled down, it becomes cold air. The cold air is then transported back to the cold air zone through the cold air duct in the circulation unit, forming a closed cooling system that repeatedly circulates. This system does not introduce dust particles present in the surrounding air, which is conducive to a clean operating environment for the high-voltage inverter.

[0018] (2) The hot air in the hot air zone is transported to the air-water cooling unit for cooling and then transported back to the cold air zone through the circulation unit to form a closed cooling system that repeatedly circulates. This system does not introduce dust particles present in the surrounding air, which helps the high voltage frequency converter to have a clean operating environment.

[0019] (3) One end of the cold air duct connected to the side wall of the cold air zone is also connected to the first cold air branch pipe, the second cold air branch pipe, and the main cold air pipe. Part of the cold air is sprayed out by the pressurized nozzle around the outer periphery of the high-voltage frequency converter through the first and second cold air branch pipes, and the other part of the cold air is output through the main cold air pipe. This arrangement allows the cold air entering the cold air zone to be quickly distributed in the cold air zone, thereby reducing the temperature fluctuation around the high-voltage frequency converter and making the operating environment more stable. At the same time, the pressurized nozzle sprays cold air, increasing the speed of cold air spraying and accelerating the rapid mixing of cold air with the air in the cold air zone, thereby ensuring the temperature stability in the cold air zone.

[0020] (4) The technical solution of this application has a simple structure and stable performance, and can operate for a long period of time, which improves the reliability of the high voltage frequency converter and ensures the safe operation of the unit. It is also easier to clean and maintain, with a lower maintenance frequency, and is easy to promote and use. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the structure of a high-voltage frequency converter heat dissipation air-water cooling system provided in an embodiment of this application;

[0023] Figure 2 A schematic diagram of the structure of a high-voltage frequency converter heat dissipation air-water cooling system provided in another embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the structure of a first cold air branch pipe, a second cold air branch pipe, and a main cold air pipe provided in an embodiment of this application.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1: Variable frequency drive room; 2: High voltage variable frequency drive; 110: Partition; 120: Hot air zone; 130: Cold air zone; 140: Fan; 210: Hot air duct; 220: Air-water cooler; 230: Water inlet pipe; 231: Water inlet valve; 240: Water outlet pipe; 241: Water outlet valve; 250: Thermometer; 310: Cold air duct; 311: First cold air branch pipe; 312: Second cold air branch pipe; 313: Main cold air pipe; 320: Axial flow fan; 330: Pressurized nozzle; 410: Filter screen; 420: Activated carbon layer. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0028] like Figure 1 As shown, this application provides a high-voltage frequency converter heat dissipation air-water cooling system, including a frequency converter chamber 1, a high-voltage frequency converter 2, an air-water cooling unit and a circulation unit;

[0029] The high-voltage frequency converter 2 is located inside the frequency converter room 1. Inside the frequency converter room 1, a partition 110 is installed on top of the high-voltage frequency converter 2. The partition 110 divides the inside of the frequency converter room 1 into an upper hot air zone 120 and a lower cold air zone 130.

[0030] The air-water cooling unit includes a hot air duct 210 and an air-water cooler 220. One end of the hot air duct 210 is connected to the side wall of the hot air zone 120, and the other end of the hot air duct 210 is connected to the hot air inlet of the air-water cooler 220.

[0031] The circulation unit includes a cold air duct 310 and an axial flow fan 320. One end of the cold air duct 310 is connected to the cold air outlet of the air-water cooler 220, and the other end of the cold air duct 310 is connected to the side wall of the cold air zone 130. The axial flow fan 320 is connected to the cold air duct 310.

[0032] Specifically, the high-voltage frequency converter 2 is located inside the frequency converter chamber 1. During operation, the high-voltage frequency converter 2 generates a large amount of heat, which is discharged through the top heat dissipation vent. The interior of the frequency converter chamber 1 is divided into an upper hot air zone 120 and a lower cold air zone 130 by a partition 110. The hot air in the hot air zone 120 is transported to the air-water cooling unit, and cold water is introduced into the air-water cooler 220. The cold water exchanges heat with the hot air from the hot air duct 210. Water has a high specific heat capacity and a fast heat transfer speed, which can quickly absorb and carry away the heat generated by the high-voltage frequency converter 2, effectively reducing the temperature. After the hot air is cooled down, it becomes cold air. The cold air is then transported back to the cold air zone 130 through the cold air duct 310 in the circulation unit. The cold air is transported back to the cold air zone 130 by turning on the axial flow fan 320, which accelerates the circulation of the cold air. This setup improves the heat exchange efficiency and achieves the goal of reducing the ambient temperature around the high-voltage frequency converter 2.

[0033] The partition 110 separates the internal space of the inverter chamber 1, preventing the heat from mixing between the hot air zone 120 and the cold air zone 130. This allows the hot air zone 120 ample space for heat dissipation, reducing hot air blockage and uneven heat dissipation, and greatly improving heat dissipation efficiency. It also enhances the efficient cooling of the hot air output from the high-voltage inverter 2 by the air-water cooling unit, thereby ensuring that the high-voltage inverter 2 is always at a suitable operating temperature, enabling it to operate stably for a long period.

[0034] Meanwhile, the hot air in the hot air zone 120 is transported to the air-water cooling unit for cooling and then returned to the cold air zone 130 through the circulation unit, forming a closed cooling system that repeatedly circulates and does not introduce dust particles present in the surrounding air, which is conducive to a clean operating environment for the high voltage frequency converter 2.

[0035] This application achieves the goal of cooling the heat dissipated during the operation of the high-voltage frequency converter through the above-mentioned scheme. By dividing the internal space of the frequency converter room into a hot air zone and a cold air zone with a partition, the hot air zone has ample space for heat dissipation, reducing hot air blockage and uneven heat dissipation, greatly improving heat dissipation efficiency, and thus ensuring that the high-voltage frequency converter is always at a suitable operating temperature, enabling long-term, stable operation. By transporting the hot air in the hot air zone to the air-water cooling unit, cold water exchanges heat with the hot air from the hot air duct. The hot air is cooled down to become cold air, which is then returned to the cold air zone through the cold air duct in the circulation unit, forming a closed-loop cooling system that repeatedly circulates. This system does not introduce dust particles from the surrounding air, contributing to a clean operating environment for the high-voltage frequency converter.

[0036] like Figure 2 As shown, optionally, a fan 140 is installed inside the hot air duct 210.

[0037] Specifically, the hot air in the hot air zone 120 is transported to the air-water cooling unit through the hot air duct 210 by the fan 140 for cooling. A negative pressure environment is formed in the hot air zone 120, which prevents the entry of external dust particles, reduces the need for frequent replacement and maintenance of the power unit in the high-voltage frequency converter 2 due to excessive dust accumulation, plays a dust prevention role, and extends the service life of the frequency converter.

[0038] like Figure 2 As shown, optionally, a filter screen 410 is provided between the cold air duct 310 and the cold air outlet of the air-water cooler 220.

[0039] Specifically, the cold air obtained after heat exchange is filtered by filter screen 410 before returning to the inverter chamber 1, so as to prevent trace particles from being carried into the inverter chamber 1 during the heat exchange process, thus ensuring that the high-voltage inverter 2 is always in a clean operating environment.

[0040] like Figure 2 As shown, optionally, an activated carbon layer 420 is provided inside the cold air duct 310 between the filter screen 410 and the outlet of the cold air duct 310.

[0041] Specifically, after the cold air is filtered by the filter screen 410, it undergoes secondary filtration and water absorption treatment through the activated carbon layer 420. When the hot air and cold water exchange heat in the air-water cooler 220, they may carry trace amounts of water. The activated carbon layer 420 further adsorbs the tiny particles and water in the cold air, ensuring the cleanliness of the cold air, improving the cleanliness of the operating environment of the high-voltage frequency converter 2, and thus improving the operational stability of the high-voltage frequency converter 2.

[0042] like Figure 3As shown, optionally, the end of the cold air duct 310 that connects to the side wall of the cold air zone 130 is also connected to the first cold air branch duct 311, the second cold air branch duct 312 and the main cold air duct 313 respectively.

[0043] Optionally, the first cold air branch pipe 311 and the second cold air branch pipe 312 are arranged along the inner periphery of the side wall of the inverter room 1, and each of the first cold air branch pipe 311 and the second cold air branch pipe 312 is equipped with a pressurized nozzle 330.

[0044] Specifically, the cross-section of the end of the cold air duct 310 entering the cold air zone 130 is divided into three parts, which are respectively connected to the first cold air branch duct 311, the second cold air branch duct 312, and the main cold air duct 313. A portion of the cold air is sprayed out by the pressurized nozzle 330 around the outer periphery of the high-voltage frequency converter 2 through the first cold air branch duct 311 and the second cold air branch duct 312, while another portion of the cold air is output through the main cold air duct 313. This arrangement allows the cold air entering the cold air zone 130 to be quickly distributed within the cold air zone 130, thereby reducing the temperature fluctuations around the high-voltage frequency converter 2 and making the operating environment more stable. At the same time, the pressurized nozzle 330 sprays cold air, increasing the speed of the cold air spray and accelerating the rapid mixing of the cold air with the air in the cold air zone 130, thus ensuring the temperature stability within the cold air zone 130.

[0045] like Figure 2 As shown, optionally, the air-water cooler 220 is connected to a cooling water inlet pipe 230 and a cooling water outlet pipe 240. The cooling water inlet pipe 230 is equipped with an inlet valve 231 and a thermometer 250, and the cooling water outlet pipe 240 is equipped with an outlet valve 241.

[0046] Specifically, the cooling water inlet pipe 230 is used to input cold water into the air-water cooler 220, where it exchanges heat with the hot air. After heat exchange, the cold water is heated and discharged through the cooling water outlet pipe 240. Thermometer 250 is used to detect the temperature inside the cooling water inlet pipe 230, ensuring that the temperature of the input cold water is below 33°C. By adjusting the opening of the inlet valve 231 and the outlet valve 241, the flow rate and pressure of the cold water can be controlled.

[0047] Optionally, an inlet pressure gauge 232 is installed on the cooling water inlet pipe 230, and an outlet pressure gauge 242 is installed on the cooling water outlet pipe 240.

[0048] Specifically, by adjusting the opening of the inlet valve 231 and the outlet valve 241, the readings of the inlet pressure gauge 232 and the outlet pressure gauge 242 are ensured to be 0.2-0.45 MPa, and the difference between the readings of the inlet pressure gauge 232 and the outlet pressure gauge 242 is not less than 0.10 MPa, so as to ensure the stable operation of the air-water cooling unit.

[0049] The technical solution of this application will be illustrated in detail below with specific embodiments.

[0050] In this embodiment, the operation flow of the high-voltage frequency converter heat dissipation air-water cooling system is as follows:

[0051] The large amount of heat generated during the operation of the high-voltage frequency converter 2 is discharged through the top heat dissipation vent. The interior of the frequency converter chamber 1 is divided into an upper hot air zone 120 and a lower cold air zone 130 by a partition 110. The fan 140 is turned on to transport the hot air in the hot air zone 120 to the air-water cooling unit. The water inlet valve 231 is opened to introduce cold water into the air-water cooler 220 through the cooling water inlet pipe 230. The cold water exchanges heat with the hot air from the hot air duct 210, and the hot air is cooled down to obtain cold air.

[0052] The cold air is filtered and adsorbed by the filter screen 410 and activated carbon layer 420 to ensure its cleanliness. By turning on the axial flow fan 320, a portion of the clean cold air is sprayed out from the pressurized nozzle 330 around the outer periphery of the high-voltage frequency converter 2 through the first cold air branch pipe 311 and the second cold air branch pipe 312. The other portion of the cold air is output through the main cold air pipe 313. This configuration allows the cold air entering the cold air zone 130 to be quickly distributed within the cold air zone 130, reducing temperature fluctuations around the high-voltage frequency converter 2 and making the operating environment more stable. It also forms a closed-loop cooling system that repeatedly circulates, accelerating the circulation of cold air and ensuring that the operating environment temperature around the high-voltage frequency converter 2 remains at a suitable level.

[0053] By adjusting the opening of the inlet valve 231 and the outlet valve 241, the readings of the inlet pressure gauge 232 and the outlet pressure gauge 242 are ensured to be 0.2-0.45 MPa, and the difference between the readings of the inlet pressure gauge 232 and the outlet pressure gauge 242 is not less than 0.10 MPa, so as to ensure the stable operation of the air-water cooling unit.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A high-voltage frequency converter heat dissipation air-water cooling system, characterized in that, Includes inverter room (1), high voltage inverter (2), air-water cooling unit and circulation unit; The high-voltage frequency converter (2) is located inside the frequency converter room (1). A partition (110) is provided on top of the high-voltage frequency converter (2) inside the frequency converter room (1). The partition (110) divides the inside of the frequency converter room (1) into an upper hot air zone (120) and a lower cold air zone (130). The air-water cooling unit includes a hot air duct (210) and an air-water cooler (220). One end of the hot air duct (210) is connected to the side wall of the hot air zone (120), and the other end of the hot air duct (210) is connected to the hot air inlet of the air-water cooler (220). The circulation unit includes a cold air duct (310) and an axial flow fan (320). One end of the cold air duct (310) is connected to the cold air outlet of the air-water cooler (220), and the other end of the cold air duct (310) is connected to the side wall of the cold air zone (130). The axial flow fan (320) is connected to the cold air duct (310).

2. The high-voltage frequency converter heat dissipation air-water cooling system according to claim 1, characterized in that, A fan (140) is installed inside the hot air duct (210).

3. The high-voltage frequency converter heat dissipation air-water cooling system according to claim 1, characterized in that, A filter screen (410) is provided between the cold air duct (310) and the cold air outlet of the air-water cooler (220).

4. The high-voltage frequency converter heat dissipation air-water cooling system according to claim 3, characterized in that, An activated carbon layer (420) is provided inside the cold air duct (310) between the filter screen (410) and the outlet of the cold air duct (310).

5. The high-voltage frequency converter heat dissipation air-water cooling system according to claim 1, characterized in that, The end of the cold air duct (310) that connects to the side wall of the cold air zone (130) is also connected to the first cold air branch duct (311), the second cold air branch duct (312), and the main cold air duct (313).

6. The high-voltage frequency converter heat dissipation air-water cooling system according to claim 5, characterized in that, The first cold air branch pipe (311) and the second cold air branch pipe (312) are arranged along the inner periphery of the side wall of the inverter room (1), and each of the first cold air branch pipe (311) and the second cold air branch pipe (312) is equipped with a pressurized nozzle (330).

7. The high-voltage frequency converter heat dissipation air-water cooling system according to any one of claims 1-6, characterized in that, The air-water cooler (220) is connected to a cooling water inlet pipe (230) and a cooling water outlet pipe (240). The cooling water inlet pipe (230) is equipped with an inlet valve (231) and a thermometer (250), and the cooling water outlet pipe (240) is equipped with an outlet valve (241).

8. The high-voltage frequency converter heat dissipation air-water cooling system according to claim 7, characterized in that, The cooling water inlet pipe (230) is equipped with an inlet pressure gauge (232), and the cooling water outlet pipe (240) is equipped with an outlet pressure gauge (242).

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