Intensive wind-water mixed heat dissipation type high-voltage frequency converter

Abstract

The invention relates to an intensive air-water mixed heat dissipation type high-voltage frequency converter, which comprises a control system, an air duct, a fan, a heat dissipation system, a phase-shifting transformer and a power unit, the power unit and the phase-shifting transformer adopt air cooling heat dissipation, the heat dissipation system adopts water cooling heat exchange, and cold air is driven by the top fan to flow into the phase-shifting transformer for heat dissipation. The air sequentially enters the cabinet front power unit and the cabinet rear phase-shifting transformer and then is converted into hot air, the hot air flows through the top air duct, enters a heat exchanger in the heat dissipation system and completes heat exchange with cooling water flowing through the interior of the heat exchanger, the cold air after heat exchange flows back to the cabinet front power unit, and a closed space is formed in the cabinet body. Compared with a traditional forced air cooling frequency converter, the forced air cooling frequency converter has the advantages of high heat dissipation efficiency and constant and controllable temperature, and compared with a traditional water cooling frequency converter, the forced air cooling frequency converter has the advantages of simple structure, convenience in maintenance, low cost, no risk of cooling water leakage around the power unit and the transformer and higher reliability because the power unit and the transformer still adopt forced air cooling heat dissipation.

Description

Technical Field

[0001] The present invention relates to the field of high-voltage and high-power frequency converters, and in particular to an intensive wind-water hybrid heat dissipation type high-voltage frequency converter. Background Art

[0002] High-voltage inverters are widely used in petrochemical, municipal water supply, steel metallurgy, electric power, cement manufacturing and other industries. With the development of industrial automation, high-voltage inverters play an increasingly important role in industrial production, and their environmental adaptability directly affects the stable operation and production efficiency of equipment.

[0003] There are generally two ways to dissipate heat for high-voltage inverters: forced air cooling and water cooling. Forced air cooling has the advantages of low cost, easy installation, and convenient maintenance, but it is easily affected by the external environment on site, especially in some dusty, high temperature, and high humidity environments, which can easily lead to reduced equipment heat dissipation performance, reduced insulation performance, and even equipment failure; conventional water-cooled inverters have the advantages of high heat dissipation efficiency, low noise, and strong environmental adaptability, but they have the problems of high cost, large size, complex installation and maintenance, and leakage risk at the connection between the unit and the water pipe. Summary of the invention

[0004] The purpose of the present invention is to provide an intensive wind-water hybrid heat dissipation type high-voltage inverter, which combines the advantages of forced air-cooled inverter and water-cooled inverter. It has the advantages of easy installation and convenient maintenance of air-cooled inverter, and strong environmental adaptability of water-cooled inverter. At the same time, it has the advantages of small size, low cost, high integration, etc., and solves the problems that forced air-cooled inverter is greatly affected by the external environment and that water-cooled inverter is high cost, large size and complex installation and maintenance.

[0005] To achieve the above object, the present invention is implemented through the following technical solutions:

[0006] An intensive wind and water mixed heat dissipation type high-voltage inverter includes a control system, an air duct, a fan, a heat dissipation system, a phase-shifting transformer, and a power unit. The power unit and the phase-shifting transformer adopt air cooling for heat dissipation, and the heat dissipation system adopts water cooling for heat exchange. Driven by the top fan, the cold air enters the power unit in front of the cabinet and the phase-shifting transformer behind the cabinet in turn and is converted into hot air. The hot air flows through the top air duct into the heat exchanger in the heat dissipation system and completes heat exchange with the cooling water flowing through the inside of the heat exchanger. The cold air after heat exchange flows back to the power unit in front of the cabinet.

[0007] The control system, fan, cooling system, phase-shifting transformer and power unit are all installed in a Fengshui mixed cooling high-voltage inverter cabinet, which has a closed space.

[0008] The heat dissipation system is arranged on one side of the cabinet, and a cooling water interface is arranged on the side wall of one side of the cabinet. The heat dissipation system includes a heat exchanger, and the cooling water interface is respectively connected to the water inlet pipe and the water outlet pipe of the heat exchanger.

[0009] The air duct is arranged at the top of the cabinet, and a fan is arranged inside the air duct.

[0010] The control system is arranged in an independent box, and the independent box is installed into the other side of the cabinet through a slide.

[0011] The power unit is a drawer-type power unit. A quick socket is provided at the rear of the power unit for connecting to the secondary winding of the phase-shifting transformer. An air-cooled radiator is provided inside the power unit. The capacitor in the power unit is arranged on one side of the air-cooled radiator. The power device and the temperature switch are arranged on the air-cooled radiator. The temperature switch is used for over-temperature protection of the power device.

[0012] The phase-shifting transformer uses a wind tube to dissipate heat. The wind tube is covered on the outside of the transformer winding to form an air duct. Cold air flows through the wind tube to dissipate heat from the transformer winding.

[0013] The power unit is arranged at the front end of the phase-shifting transformer.

[0014] The control system includes a frequency converter control machine and a touch screen. The frequency converter control machine is connected to the touch screen through a port. The chips of the frequency converter control machine are DSP and FPGA.

[0015] The power device includes IGBT and a rectifier bridge. The rectifier bridge is used to convert the AC power input from the secondary winding of the phase-shifting transformer into DC power, and the IGBT is used to convert the DC power after capacitor filtering into AC power again.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The Fengshui mixed heat dissipation high-voltage inverter cabinet has a closed space and does not require external air inlets and exhaust vents. It can prevent external air and dust from entering the cabinet and affecting the operation of the equipment. It has high reliability, long service life, and strong environmental adaptability.

[0018] 2. The cabinet adopts the self-circulation heat dissipation method. Driven by the centrifugal fan on the top of the inverter, the cold air flows through the power unit and transformer in the cabinet to dissipate the heat and then converts into hot air. The hot air enters the heat dissipation system and flows through the internal heat exchanger. It exchanges heat with the external cooling water and is converted back into cold air to complete the heat exchange. Because the external cooling water participates in the heat exchange, compared with the traditional forced air-cooled inverter, it has the advantages of high heat dissipation efficiency and constant and controllable temperature. Because the power unit and transformer still use forced air cooling for heat dissipation, compared with the traditional water-cooled inverter, it has the advantages of simple structure, convenient maintenance and low cost. At the same time, there is no risk of cooling water leakage around the power unit and transformer, and the reliability is higher;

[0019] 3. The Feng Shui hybrid heat dissipation high-voltage inverter adopts an intensive integrated structure. The power unit, phase-shifting transformer, control system, and heat dissipation system are all integrated in one cabinet. It has the advantages of compact structure, small footprint, and simple installation. It is also convenient for equipment storage, packaging, and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the main view of an intensive Feng Shui hybrid cooling high voltage inverter.

[0021] Figure 2 This is a side view of the intensive Feng Shui hybrid heat dissipation high-voltage inverter with the side panel removed.

[0022] Figure 3 This is the main view of the intensive Feng Shui hybrid heat dissipation high-voltage inverter with part of the front door removed.

[0023] Figure 4 It is a side sectional view of an intensive Feng Shui hybrid heat dissipation type high voltage inverter.

[0024] Figure 5 is an isometric view of the control system.

[0025] Figure 6 This is the expanded view of the control system cabinet.

[0026] Figure 7 It is an isometric view of the power unit with the connecting copper bus removed.

[0027] Figure 8 is an isometric view of a phase-shifting transformer.

[0028] Fig. 9 This is a schematic diagram of the interior of the cooling system with the front door removed.

[0029] Fig.10 It is the main view of the heat dissipation principle of the intensive Feng Shui mixed heat dissipation type high-voltage inverter.

[0030] Fig.11 It is a side view of the heat dissipation principle of an intensive Feng Shui hybrid heat dissipation high voltage inverter.

[0031] In the figure: 1-cabinet 2-control system 3-air duct 4-fan 5-cooling system 6-phase-shifting transformer 7-power unit 8-cooling water interface 9-box 10-inverter control machine 11-power box 12-UPS power supply 13-digital signal control module 14-quick socket 15-handle 16-capacitor 17-air-cooled radiator 18-power device 19-temperature switch 20-wind tube 21-heat exchanger 22-pressure gauge 23-display screen. DETAILED DESCRIPTION

[0032] The present invention is described in detail below in conjunction with the accompanying drawings, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0033] The following examples are implemented on the premise of the technical solution of the present invention, and provide detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[0034] [Example 1]

[0035] An intensive wind and water mixed heat dissipation high-voltage inverter, comprising a control system 2, an air duct 3, a fan 4, a heat dissipation system 5, a phase-shifting transformer 6, and a power unit 7, see Figure 1-4 ,See Figure 9-11 The power unit 7 and the phase-shifting transformer 6 are cooled by air, and the heat dissipation system 5 is cooled by water. Driven by the top fan 4, the cold air enters the power unit 7 in front of the cabinet and the phase-shifting transformer 6 behind the cabinet in turn and is converted into hot air. The hot air flows through the top air duct 3 into the heat exchanger 21 in the heat dissipation system 5, and completes heat exchange with the cooling water flowing through the heat exchanger 21. The cold air after heat exchange flows back to the air inlet of the power unit 7 in front of the cabinet, realizing the closed circulation of the cooling air inside the high-voltage inverter, and completing heat exchange with the external cooling water. Fig.10 , 11 middle,

[0036] Indicates cold air, Indicates cold air, Indicates cooling water inflow. Indicates cooling water return; the high-voltage inverter does not need to be configured with external air inlet and exhaust vents, and adopts a fully enclosed structure. External air and dust cannot enter the inverter and cannot affect the operation of the equipment; the control system 2, air duct 3, fan 4, cooling system 5, phase-shifting transformer 6, and power unit 7 are all installed in a wind-water mixed cooling high-voltage inverter cabinet 1, which adopts an intensive integrated design, has a compact structure, occupies a small area, and is easy to install and maintain.

[0037] The cooling system 5 is arranged on the right side of the cabinet 1, and a cooling water interface 8 is arranged on the side wall of one side of the cabinet 1. The cooling system 5 includes a heat exchanger 21, a pressure gauge 22, and a display screen 23. The pressure gauge 22 is used to detect the operating status of the cooling system 5, and the display screen 23 is used for human-computer interaction and equipment status display. The cooling water interface 8 is respectively connected to the water inlet pipe and the water outlet pipe of the heat exchanger 21; the air duct 3 is arranged at the top of the cabinet 1, and a fan 4 is arranged inside the air duct 3; see Figure 5 , Figure 6 , the control system 2 is arranged in an independent box 9, and the independent box 9 is installed in the upper left part of the cabinet 1 through a slide. The control system 2 can be independently assembled and wired outside the cabinet 1. The box 9 of the control system 2 is a deployable structure, which is convenient for the installation and wiring of internal electrical components; the control system 2 includes a frequency converter control machine 10, a digital signal control module 13, a power box 11, and a UPS power supply 12. The power box 11 and the UPS power supply 12 are used to provide working power to the control system 2. The frequency converter control machine 10 is connected to the digital signal control module 13 through a port. The DI module of the digital signal control module 13 receives the operating status signal of the fan 4 and sends it to the frequency converter control machine 10 through the optical fiber port for status monitoring. The DO module of the digital signal control module 13 converts the received drive instruction into a DO signal to drive the fan 4 to start and stop; the chips in the frequency converter control machine 10 and the digital signal control module 13 are CPLD, FPGA, DSP, or a single-chip microcomputer; see Figure 7 The power unit 7 is a drawer-type power unit 7. A quick socket 14 is provided at the rear of the power unit 7 for connecting to the secondary winding of the phase-shifting transformer of the inverter. A handle 15 is provided at the front of the power unit 7 for convenient disassembly and installation of the power unit 7. An air-cooled radiator 17 is provided inside the power unit 7. The capacitor 16 in the power unit 7 is arranged on one side of the air-cooled radiator 17 for convenient installation and connection of the capacitor 16. A power device 18 and a temperature switch 19 are arranged on the air-cooled radiator 17. The temperature switch 19 is used for over-temperature protection of the power device 18. Cold air flows through the air-cooled radiator 17 to dissipate heat for the working power device. The power device 18 includes an IGBT and a rectifier bridge; see Figure 8 The phase-shifting transformer 6 uses a wind tube 20 to dissipate heat. The wind tube 20 is wrapped around the outside of the transformer winding to form an air duct 3. Cold air flows through the wind tube 20 to dissipate heat for the transformer winding.

[0038] The wind and water mixed heat dissipation type high-voltage inverter cabinet of the present invention has a closed space and does not need to be configured with external air inlet and exhaust vents. It can prevent external air and dust from entering the cabinet and affecting the operation of the equipment. It has the advantages of high reliability, long service life, and strong environmental adaptability. It adopts a self-circulating heat dissipation method in the cabinet. Driven by the centrifugal fan on the top of the inverter, the cold air flows through the power unit and transformer in the cabinet to dissipate the heat and is converted into hot air. The hot air enters the heat dissipation system and flows through the internal heat exchanger. It exchanges heat with the cooling water supplied from the outside and is converted back into cold air to complete the heat exchange. Because the external cooling water participates in the exchange, Compared with traditional forced air-cooled inverters, it has the advantages of high heat dissipation efficiency and constant and controllable temperature. Because the power unit and transformer still use forced air cooling for heat dissipation, compared with traditional water-cooled inverters, it has the advantages of simple structure, convenient maintenance and low cost. At the same time, there is no risk of cooling water leakage around the power unit and transformer, and the reliability is higher. The air-water mixed heat dissipation high-voltage inverter adopts an intensive integrated structure. The power unit, phase-shifting transformer, control system, and heat dissipation system are all integrated in one cabinet. It has the advantages of compact structure, small footprint, and simple installation. It is also convenient for equipment storage, packaging and transportation.

Claims

1. An intensive Feng Shui hybrid heat dissipation high voltage inverter, characterized in that: It includes a control system, air duct, fan, cooling system, phase-shifting transformer, and power unit. The power unit and phase-shifting transformer adopt air cooling for heat dissipation, and the cooling system adopts water cooling for heat exchange. Driven by the top fan, cold air enters the power unit in front of the cabinet and the phase-shifting transformer behind the cabinet in turn and is converted into hot air. The hot air flows through the top air duct into the heat exchanger in the cooling system and completes heat exchange with the cooling water flowing through the heat exchanger. After the heat exchange, the cold air flows back to the power unit in front of the cabinet. The control system, fan, cooling system, phase-shifting transformer and power unit are all installed in a Fengshui mixed cooling high-voltage inverter cabinet, which has a closed space.

2. The intensive Feng Shui hybrid heat dissipation high voltage inverter according to claim 1 is characterized in that: The heat dissipation system is arranged on one side of the cabinet, a cooling water interface is arranged on the side wall of one side of the cabinet, the heat dissipation system comprises a heat exchanger, and the cooling water interface is respectively connected to the water inlet pipe and the water outlet pipe of the heat exchanger.

3. The intensive Feng Shui hybrid heat dissipation high voltage inverter according to claim 1 is characterized in that: The air duct is arranged at the top of the cabinet, and a fan is arranged inside the air duct.

4. The intensive Feng Shui hybrid heat dissipation high voltage inverter according to claim 1 is characterized in that: The control system is arranged in an independent box, and the independent box is installed into the other side of the cabinet through a slide.

5. The intensive Feng Shui hybrid heat dissipation high voltage inverter according to claim 1 is characterized in that: The power unit is a drawer-type power unit. A quick socket is provided at the rear of the power unit for connecting to the secondary winding of the phase-shifting transformer. An air-cooled radiator is provided inside the power unit. The capacitor in the power unit is arranged on one side of the air-cooled radiator. The power device and the temperature switch are arranged on the air-cooled radiator. The temperature switch is used for over-temperature protection of the power device.

6. The intensive Feng Shui hybrid heat dissipation high voltage inverter according to claim 1, characterized in that: The phase-shifting transformer adopts a wind tube for heat dissipation. The wind tube is covered on the outside of the transformer winding to form an air duct. Cold air flows through the wind tube to dissipate heat for the transformer winding.

7. The intensive Feng Shui hybrid heat dissipation high voltage inverter according to claim 1, characterized in that: The power unit is arranged at the front end of the phase-shifting transformer.

8. The intensive Feng Shui mixed heat dissipation high voltage inverter according to claim 4 is characterized in that: The control system comprises a frequency converter control machine and a touch screen. The frequency converter control machine and the touch screen are connected via a port. The chips of the frequency converter control machine are DSP and FPGA.

9. The intensive Feng Shui hybrid heat dissipation high voltage inverter according to claim 5, characterized in that: The power device comprises an IGBT and a rectifier bridge. The rectifier bridge is used to convert the alternating current input from the secondary winding of the phase-shifting transformer into direct current, and the IGBT is used to convert the direct current filtered by the capacitor into alternating current again.

Images