A water-cooling heat dissipation device for frequency converter

Abstract

The utility model belongs to the technical field of frequency converter heat dissipation, especially relates to a frequency converter water cooling heat dissipation device, including heat exchanger, expansion tank, water pump, outlet water line, water cooling plate, backwater line, fan, outlet water line is connected with expansion tank, outlet water line is connected with water cooling plate, water cooling plate is connected with backwater line, backwater line is connected with heat exchanger, heat exchanger is connected with expansion tank through pipeline, water cooling plate is fixedly connected with frequency converter, the fan sets up in the outside heat exchanger, and the heat of heat exchanger is blown to the outside cabinet. Advantages are: flexible and reasonable structure, the water cooling plate and frequency converter can be integrated design, according to the frequency converter installation environment and heat dissipation demand adjustment water cooling plate and the arrangement of pipeline, can satisfy the need of compact structure layout, save space. The heat dissipation device is small, adopts integrated design to make this water cooling heat dissipation system be able to adapt to various space limited installation environment, especially suitable for using in compact industrial equipment.

Description

Technical Field

[0001] This utility model belongs to the field of frequency converter heat dissipation technology, and in particular relates to a water-cooled heat dissipation device for frequency converters. Background Technology

[0002] With the continuous development of industrial automation and electrical equipment, frequency converters, as important power electronic devices, have been widely used in motor speed regulation, energy-saving control, and other fields. However, frequency converters generate a large amount of heat during operation, especially power devices such as IGBTs, whose heat generation is closely related to output power. If heat dissipation is not effective, the temperature of power devices will become too high, which will affect the performance, reliability, and service life of the frequency converter, and may even cause failures, resulting in equipment downtime and economic losses.

[0003] Traditional inverter cooling methods mainly include natural cooling, air cooling, and water cooling. Natural cooling has low heat dissipation efficiency and is only suitable for low-power inverters. Although air cooling has a simple structure, in high-power inverters, the power components generate a lot of heat, and air cooling alone is insufficient to meet the heat dissipation requirements. In addition, the fan operation generates a lot of noise, affecting the working environment. Water cooling systems, on the other hand, have advantages such as high heat exchange efficiency and strong heat dissipation capacity, and can effectively solve the heat dissipation problem of high-power inverters.

[0004] However, existing water-cooling systems still have some shortcomings when used for inverter heat dissipation. On the one hand, some water-cooling systems are large in size, occupying too much space when integrated with the inverter, limiting the compactness and flexibility of the equipment; on the other hand, some water-cooling systems are noisy during operation, affecting the comfort of the working environment. Moreover, existing water-cooling systems are not flexible enough in adjusting heat dissipation to cope with different power outputs of the inverter, and cannot adjust the cooling intensity in real time according to the actual heat generation of the power devices, resulting in high system energy consumption or poor heat dissipation performance under high load.

[0005] Therefore, a water-cooling system that is compact, flexible in layout, highly efficient in heat exchange, and has a long service life is needed to meet the requirements of different application scenarios and achieve effective heat dissipation for the power devices of the frequency converter. Summary of the Invention

[0006] To overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a water-cooled heat dissipation device for frequency converters, which can effectively dissipate heat from the power devices of the frequency converter, reduce the size, and allow for flexible arrangement.

[0007] To achieve the above objectives, this utility model employs the following technical solution:

[0008] A water-cooled heat dissipation device for a frequency converter includes a heat exchanger, an expansion tank, a water pump, an outlet water pipe, a water-cooling plate, a return water pipe, and a fan. The outlet water pipe is connected to the expansion tank, the water-cooling plate, and the return water pipe. The return water pipe is connected to the heat exchanger, and the heat exchanger is connected to the expansion tank via a pipe. The water-cooling plate is fixedly connected to the frequency converter. The fan is located outside the heat exchanger to blow the heat from the heat exchanger to the outside of the cabinet.

[0009] The water-cooled plate includes a plate body and a heat dissipation coil. The heat dissipation coil is a U-shaped tube arranged in a continuous, tortuous planar manner. The two ends of the heat dissipation coil are the liquid inlet and the liquid outlet, respectively. The heat dissipation coil is fixed to the plate body. The liquid inlet and the liquid outlet are located at the ends of the plate body and are connected to the water outlet pipe and the water return pipe, respectively.

[0010] The water-cooled plates are multiple.

[0011] The water outlet pipeline includes a main water outlet pipe and branch water outlet pipes. The branch water outlet pipes are connected to the water cooling plate. There are two or more branch water outlet pipes, and each branch water outlet pipe is connected to the main water outlet pipe. The main water outlet pipe is connected to the expansion tank.

[0012] The return water pipeline includes a main return water pipe and branch return water pipes. The branch return water pipes are connected to the water-cooled plate. There are two or more branch return water pipes, and each branch return water pipe is connected to the main return water pipe. The main return water pipe is connected to the heat exchanger.

[0013] The expansion tank outlet is connected to a water pump, and the water pump outlet is connected to a water outlet pipeline.

[0014] The heat exchanger includes heat exchange tubes and heat sinks. The heat exchange tubes are arranged in parallel to each other and their ends are connected to each other. The heat sinks are fixedly connected to the heat exchange tubes. An exhaust port is connected to the heat exchange tubes at the top.

[0015] A flow sensor is installed on the outlet water pipe, and a temperature sensor is installed on the return water pipe.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. The inverter water-cooling heat dissipation device has a flexible and reasonable structure. The water-cooling plate and inverter can be integrated into the design. The arrangement of the water-cooling plate and piping can be adjusted according to the inverter's installation environment and heat dissipation requirements to meet the needs of a compact structural layout and save space. The heat dissipation device is small in size, and its integrated design allows the water-cooling heat dissipation system to adapt to various space-constrained installation environments, making it especially suitable for use in compact industrial equipment.

[0018] 2. The inverter's water-cooling system employs a high-efficiency heat exchanger + fan cooling structure, improving heat dissipation efficiency. It quickly transfers heat from the power components to the coolant, and then the fan exchanges heat with the air, effectively reducing the coolant temperature and ensuring good heat dissipation even during high-power operation. Compared to simple fan cooling, this reduces noise pollution during operation and improves the comfort of the user environment.

[0019] 3. The inverter water cooling heat dissipation device adopts a closed structure, which avoids coolant leakage and external impurities from entering the system, reduces maintenance needs, lowers maintenance costs, and improves system reliability and service life. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 .

[0021] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 .

[0022] Figure 3 This is a schematic diagram showing the connection between the water-cooled plate and the frequency converter.

[0023] Figure 4 This is a schematic diagram of the water-cooled plate.

[0024] Figure 5 This is a schematic diagram of the heat exchanger.

[0025] Figure 6 This is a schematic diagram showing the connection between the heat exchanger tube and the heat sink.

[0026] In the diagram: 1. Fan; 2. Heat exchanger; 3. Expansion tank; 4. Water pump; 5. Outlet water pipe; 6. Water-cooled plate; 7. Inverter; 8. Return water pipe; 9. Temperature sensor; 10. Flow sensor; 11. Exhaust port; 12. Inlet water port; 13. Plate body; 14. Cooling coil; 15. Heat exchange tube; 16. Heat sink. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings. However, it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0028] See Figures 1-6A water-cooled heat dissipation device for a frequency converter includes a heat exchanger 2, an expansion tank 3, a water pump 4, an outlet water pipe 5, a water-cooled plate 6, a return water pipe 8, and a fan 1. The outlet water pipe 5 is connected to the expansion tank 3, the water-cooled plate 6, and the return water pipe 8. The return water pipe 8 is connected to the heat exchanger 2, and the heat exchanger 2 is connected to the expansion tank 3 via pipes to form a closed loop. The frequency converter 7 is installed inside a cabinet and can be arranged according to electrical clearance and heat dissipation requirements. The water-cooled plate is tightly and fixedly connected to the heat-generating parts of the frequency converter 7, such as power devices that require heat dissipation. The fan 1 is located outside the heat exchanger 2 to blow the heat from the heat exchanger 2 to the outside of the cabinet. The outlet of the expansion tank 3 is connected to the water pump 4, and the outlet of the water pump 4 is connected to the outlet water pipe 5. A flow sensor 10 is installed on the outlet water pipe 5, and a temperature sensor 9 is installed on the return water pipe 8. The speed of the fan 1 and the flow rate of the water pump 4 can be adjusted according to the collected flow and temperature data. The water pump 4 can be a DC brushless water pump 4, with an integrated rotor and blade structure, good sealing performance, and high pressure resistance.

[0029] The water-cooled plate 6 adopts an aluminum substrate with embedded copper tubes for corrosion resistance. The water-cooled plate 6 includes a plate body 13 and heat dissipation coils 14. The heat dissipation coils 14 are U-shaped tubes arranged in a continuous, tortuous planar pattern. The two ends of the heat dissipation coils 14 are the liquid inlet and outlet, respectively. The heat dissipation coils 14 are fixed to the plate body 13. The liquid inlet and outlet are located at the ends of the plate body 13 and are connected to the outlet water pipe 5 and the return water pipe 8, respectively. Multiple water-cooled plates 6 are used, and each water-cooled plate 6 is fixed to the power devices and heat-generating components of each inverter 7. The heat dissipation coils 14 of each water-cooled plate 6 are connected in parallel to the outlet water pipe 5 and the return water pipe 8, respectively.

[0030] The water outlet pipe 5 includes a main water outlet pipe and branch water outlet pipes. Each branch water outlet pipe is connected to the water-cooled plate 6. There are two or more branch water outlet pipes connected to the water-cooled plate 6, and each branch water outlet pipe is connected to the main water outlet pipe. The main water outlet pipe is connected to the expansion tank 3. Similarly, the water return pipe 8 includes a main water return pipe and branch water return pipes. Each branch water return pipe is connected to the water-cooled plate 6. There are two or more branch water return pipes connected to the main water return pipe, and the main water return pipe is connected to the heat exchanger 2.

[0031] The heat exchanger 2 includes heat exchange tubes 15 and heat sinks 16. The heat exchange tubes 15 are arranged in parallel and their ends are interconnected to form a series closed pipeline. The heat exchange tubes 15 are made of copper. The heat sinks 16 are fixedly connected to the heat exchange tubes 15. An exhaust port 11 is connected to the top heat exchange tube 15 to remove internal air; a water inlet 12 is connected to the bottom heat exchange tube 15 for adding coolant. Furthermore, the parallel heat exchange tubes 15 can be connected in parallel, with each heat exchange tube 15 on both sides of the heat exchanger 2 connected to a main pipe and led to the outside to connect with the return water pipe 8 and the expansion tank 3. The heat sinks 16 can be made of aluminum plates with a high heat transfer coefficient and are vacuum brazed to the heat exchange tubes 15 to extend their service life.

[0032] The function of expansion tank 3 is to allow the coolant to expand in volume when the temperature rises, flowing into and being stored in expansion tank 3. When the temperature drops, the coolant contracts in volume, and some of the liquid stored in expansion tank 3 flows back into the pipeline to participate in the system circulation. This solves the problem of the impact of coolant volume changes due to thermal expansion and contraction on the pipeline, and can replace the water tank, reducing its size.

[0033] When the inverter water cooling heat dissipation device is operating normally, the coolant flows through the water cooling plate 6 to transfer the heat of the power device to the heat exchanger 2, and then exchanges heat with the air through the fan 1. After the coolant temperature is reduced, it flows back to the water pump 4 to complete the circulation.

[0034] When inverter 7 outputs low power, the power devices generate less heat, resulting in lower temperature readings. The speeds of water pump 4 and fan 1 are reduced to match the current heat output, thus lowering system energy consumption. When inverter 7 outputs higher power, the power devices generate more heat, and the collected temperature readings may approach or even briefly exceed the set value. In this case, the speeds of water pump 4 and fan 1 are increased to accommodate the current heat output. If the temperature exceeds the set value for more than 5 seconds, an over-temperature signal is transmitted to inverter 7, which then reduces its output power to reach a new equilibrium point, ensuring safe equipment operation.

[0035] This utility model features a flexible and reasonable structure. The water-cooled plate 6 and the frequency converter 7 can be integrated into a single design. The arrangement of the water-cooled plate 6 and piping can be adjusted according to the installation environment and heat dissipation requirements of the frequency converter 7, thus meeting the needs of a compact structural layout and saving space. The small size and integrated design of this heat dissipation device allow the water-cooled heat dissipation system to adapt to various space-constrained installation environments, making it particularly suitable for use in compact industrial equipment.

[0036] Through the above specific embodiments, those skilled in the art can easily implement this utility model. However, it should be understood that this utility model is not limited to the specific embodiments described above. Based on the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions. Due to space limitations and for the sake of brevity, not all of these combined solutions have been described. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A water-cooled heat dissipation device for a frequency converter, characterized in that, It includes a heat exchanger, an expansion tank, a water pump, an outlet water pipe, a water-cooled plate, a return water pipe, and a fan. The outlet water pipe is connected to the expansion tank, the water-cooled plate, and the return water pipe. The return water pipe is connected to the heat exchanger, and the heat exchanger is connected to the expansion tank via a pipe. The water-cooled plate is fixedly connected to the frequency converter. The fan is located outside the heat exchanger and blows the heat from the heat exchanger to the outside of the cabinet.

2. The inverter water-cooling heat dissipation device according to claim 1, characterized in that, The water-cooled plate includes a plate body and a heat dissipation coil. The heat dissipation coil is a U-shaped tube arranged in a continuous, tortuous planar manner. The two ends of the heat dissipation coil are the liquid inlet and the liquid outlet, respectively. The heat dissipation coil is fixed to the plate body. The liquid inlet and the liquid outlet are located at the ends of the plate body and are connected to the water outlet pipe and the water return pipe, respectively.

3. The inverter water-cooling heat dissipation device according to claim 1, characterized in that, The water-cooled plates are multiple.

4. The inverter water-cooling heat dissipation device according to claim 1, characterized in that, The water outlet pipeline includes a main water outlet pipe and branch water outlet pipes. The branch water outlet pipes are connected to the water cooling plate. There are two or more branch water outlet pipes, and each branch water outlet pipe is connected to the main water outlet pipe. The main water outlet pipe is connected to the expansion tank.

5. The inverter water-cooling heat dissipation device according to claim 1, characterized in that, The return water pipeline includes a main return water pipe and branch return water pipes. The branch return water pipes are connected to the water-cooled plate. There are two or more branch return water pipes, and each branch return water pipe is connected to the main return water pipe. The main return water pipe is connected to the heat exchanger.

6. The inverter water-cooling heat dissipation device according to claim 1, characterized in that, The expansion tank outlet is connected to a water pump, and the water pump outlet is connected to a water outlet pipeline.

7. The inverter water-cooling heat dissipation device according to claim 1, characterized in that, The heat exchanger includes heat exchange tubes and heat sinks. The heat exchange tubes are arranged in parallel to each other and their ends are connected to each other. The heat sinks are fixedly connected to the heat exchange tubes. An exhaust port is connected to the heat exchange tubes at the top.

8. A water-cooled heat dissipation device for a frequency converter according to claim 1, characterized in that, A flow sensor is installed on the outlet water pipe, and a temperature sensor is installed on the return water pipe.

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