A hybrid heat dissipating power electronic device

Abstract

A kind of hybrid heat dissipation power electronic equipment, comprising: heat-generating power valve group, cooling water machine, water-air heat exchanger, plate heat exchanger and cold water tower, several water cooling pipelines;First heat dissipation pipeline is arranged in heat-generating power valve group, second heat dissipation pipeline and first cooling pipeline are arranged in plate heat exchanger, third heat dissipation pipeline is arranged in water-air heat exchanger, second cooling pipeline is arranged in cold water tower, first heat dissipation pipeline, second heat dissipation pipeline are connected in series by water cooling pipeline and form a heat dissipation pipeline loop, third heat dissipation pipeline is connected in parallel with second heat dissipation pipeline by water cooling pipeline, first cooling pipeline and second cooling pipeline are connected in series by water cooling pipeline and form a cooling pipeline loop.The hybrid heat dissipation power electronic equipment of the utility model can carry out water cooling and water-air heat dissipation simultaneously, improves heat dissipation efficiency, and has good heat dissipation effect, good adaptability and high reliability.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a power electronic device with hybrid heat dissipation. Background Technology

[0002] Power electronic equipment is a device that uses power electronic components as its core functional elements to process electricity through power conversion and control. It mainly includes converters, inverters, rectifiers, and static var generators, and is widely used in industrial automation, new energy power generation, power grid stability, and transportation. Its core components encompass semi-controlled devices (such as thyristors) and fully controlled devices such as IGBT power units, performing core functions such as AC / DC conversion and voltage regulation through high-frequency switching operations.

[0003] When power electronic equipment is in operation, its power units and other heat-generating power valves generate a large amount of heat, requiring an efficient cooling system to ensure its normal operation. Existing power electronic equipment often uses a single cooling method, such as water cooling or air cooling, which suffers from poor environmental adaptability and insufficient reliability. Especially under high temperature or overload conditions, the heat dissipation capacity decreases, affecting the equipment's lifespan and performance.

[0004] Therefore, there is an urgent need to provide a power electronic device with good heat dissipation and high reliability. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a hybrid heat dissipation power electronic device with good heat dissipation effect and high heat dissipation efficiency, thereby solving the above-mentioned technical problems.

[0006] This application provides a hybrid heat dissipation power electronic device, including: a heat-generating power valve group, a cooling water machine, a water-air heat exchanger, a plate heat exchanger, a cooling tower, and several water-cooled pipes; the heat-generating power valve group is provided with a first heat dissipation pipe, the plate heat exchanger is provided with a second heat dissipation pipe and a first cooling pipe, the water-air heat exchanger is provided with a third heat dissipation pipe, and the cooling tower is provided with a second cooling pipe. The first heat dissipation pipe and the second heat dissipation pipe are connected in series through the water-cooled pipe to form a heat dissipation pipe loop, the third heat dissipation pipe is connected in parallel with the second heat dissipation pipe through the water-cooled pipe, and the first cooling pipe and the second cooling pipe are connected in series through the water-cooled pipe to form a cooling pipe loop.

[0007] Preferably, the above-mentioned heat-generating power valve group has a three-phase structure, and the first heat dissipation pipes of each phase valve group are connected in parallel.

[0008] Preferably, the cooling water machine includes a circulating water pump, a pressure tank, a water replenishment tank, and a three-way valve, wherein the three-way valve includes a first three-way valve and a second three-way valve, each having three ports.

[0009] Preferably, the three ports of the first three-way valve are respectively connected to the first heat dissipation pipe, the second heat dissipation pipe and the third heat dissipation pipe through the water cooling pipe.

[0010] Preferably, the aforementioned hybrid heat dissipation power electronic device is further provided with a connecting pipe in parallel with the second heat dissipation pipe, and the three ports of the second three-way valve are respectively connected to the first heat dissipation pipe, the first three-way valve and the connecting pipe through the water cooling pipe.

[0011] Preferably, the circulating water pump, pressure tank, and water replenishment tank are located on the water-cooling pipeline between the first heat dissipation pipeline and the connecting pipeline.

[0012] Preferably, the circulating water pump includes a first circulating water pump and a second circulating water pump, wherein the second circulating water pump is connected in parallel with the first circulating water pump.

[0013] Preferably, the water-air heat exchanger is provided with a plurality of fans, and a temperature sensor is provided on the water-cooled pipe between the first heat dissipation pipe and the connecting pipe. The hybrid heat dissipation power electronic device is also provided with a control cabinet that receives the temperature signal from the temperature sensor and controls the operation of the first three-way valve, the second three-way valve, the first circulating water pump, the second circulating water pump and each of the fans according to the received temperature signal.

[0014] Preferably, the plate heat exchanger further includes a support frame, the second heat dissipation pipe and the first cooling pipe are fixed in the support frame, the two ends of the second heat dissipation pipe are a hot-side inlet and a hot-side outlet respectively, the two ends of the first cooling pipe are a cold-side inlet and a cold-side outlet respectively, the hot-side inlet, the hot-side outlet, the cold-side inlet and the cold-side outlet are disposed on one side of the support frame, and the outer surfaces of the second heat dissipation pipe and the first cooling pipe are provided with uniformly arranged heat dissipation plates.

[0015] Preferably, the heat sink is arranged perpendicularly to the second heat dissipation pipe and the first cooling pipe.

[0016] Compared with the prior art, this utility model has the following advantages: The first and second heat dissipation pipes of the hybrid heat dissipation power electronic device are connected in series via water-cooled pipes to form a single pipe loop. Similarly, the first and second cooling pipes are also connected in series via water-cooled pipes to form a single pipe loop. This means that the power valve group within the hybrid heat dissipation power electronic device can be cooled by water using a plate heat exchanger. The third heat dissipation pipe is connected in parallel with the second heat dissipation pipe via water-cooled pipes. This means that the power valve group within the hybrid heat dissipation power electronic device can be cooled by water-air heat exchangers.

[0017] This invention relates to a hybrid heat dissipation power electronic device that can simultaneously achieve water cooling via a plate heat exchanger and water-air cooling via a water-air heat exchanger. This significantly improves the efficiency of heat dissipation for power-generating valve groups, resulting in excellent heat dissipation. When in extreme high-temperature environments, the hybrid heat dissipation power electronic device is largely unaffected by ambient temperature when both water cooling and water-air cooling are applied simultaneously, further enhancing its adaptability to extreme environments.

[0018] When one of the plate heat exchangers and the water-air heat exchanger fails, the other heat exchanger can continue to work, preventing the heating power valve group from overheating and being damaged due to the failure of one heat exchanger. This greatly improves the reliability of the hybrid heat dissipation power electronic equipment and extends its service life.

[0019] The first and second heat dissipation pipes are connected in series via water-cooling pipes to form a heat dissipation pipe loop. The third heat dissipation pipe is connected in parallel with the second heat dissipation pipe via water-cooling pipes. The first and second cooling pipes are connected in series via water-cooling pipes to form a cooling pipe loop. In other words, the internal heat dissipation pipe loops and cooling pipe loops of the hybrid heat dissipation power electronic device of this invention are independent circulating water circuits. Therefore, while improving the heat dissipation efficiency of the hybrid heat dissipation power electronic device, the internal heat dissipation pipe loops are not subject to external contamination. Attached Figure Description

[0020] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0021] Figure 1 This is a schematic diagram of the structure of a hybrid heat dissipation power electronic device according to the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of a plate heat exchanger for a power electronic device with hybrid heat dissipation according to this utility model.

[0023] Figure 3 This is a side view of a plate heat exchanger for a power electronic device with hybrid heat dissipation according to this utility model. Detailed Implementation

[0024] The present invention will be further described in conjunction with the following embodiments and accompanying drawings:

[0025] This application provides a hybrid heat dissipation power electronic device, such as... Figures 1 to 3As shown, it includes: a heating power valve group 6, a cooling water machine (not shown in the figure), a water-air heat exchanger 4, a plate heat exchanger 2, a cooling tower 5, and several water-cooled pipes 10; the heating power valve group 6 is equipped with a first heat dissipation pipe (not shown in the figure), the plate heat exchanger 2 is equipped with a second heat dissipation pipe (not shown in the figure) and a first cooling pipe (not shown in the figure), the water-air heat exchanger 4 is equipped with a third heat dissipation pipe (not shown in the figure), and the cooling tower 5 is equipped with a second cooling pipe (not shown in the figure). The first heat dissipation pipe (not shown in the figure) and the second heat dissipation pipe (not shown in the figure) are connected in series through the water-cooled pipes 10 to form a heat dissipation pipe loop 23. The third heat dissipation pipe (not shown in the figure) is connected in parallel with the second heat dissipation pipe (not shown in the figure) through the water-cooled pipes 10. The first cooling pipe (not shown in the figure) and the second cooling pipe (not shown in the figure) are connected in series through the water-cooled pipes 10 to form a cooling pipe loop 24 (not shown in the figure).

[0026] Hybrid heat dissipation power electronic equipment is a device that processes electricity through power conversion and control. It mainly includes static var generators, converters, inverters, rectifiers, and other devices containing power units with high heat generation. The water-air heat exchanger 4 can be a conventional water-air heat exchanger, the plate heat exchanger 2 can be a conventional plate heat exchanger, and the cooling tower 5 can be a conventional cooling tower.

[0027] The first and second heat dissipation pipes (not shown in the figure) of the hybrid heat dissipation power electronic device of this invention are connected in series through a water-cooled pipe 10 to form a heat dissipation pipe loop 23. The first and second cooling pipes (not shown in the figure) are also connected in series through the water-cooled pipe 10 to form a cooling pipe loop 24 (not shown in the figure). That is, the heat-generating power valve group 6 in the hybrid heat dissipation power electronic device can be cooled by water through the plate heat exchanger 2. The third heat dissipation pipe (not shown in the figure) is connected in parallel with the second heat dissipation pipe (not shown in the figure) through the water-cooled pipe 10. That is, the heat-generating power valve group 6 in the hybrid heat dissipation power electronic device can be cooled by water through the water-air heat exchanger 4.

[0028] This invention relates to a hybrid heat dissipation power electronic device that can simultaneously achieve water cooling via plate heat exchanger 2 and water-air cooling via water-air heat exchanger 4. This significantly improves the efficiency of heat dissipation for the power-generating valve assembly 6, resulting in excellent heat dissipation. Even in extremely high-temperature environments, this hybrid heat dissipation power electronic device can simultaneously perform water cooling and water-air cooling, remaining largely unaffected by ambient temperature, further enhancing its adaptability to extreme environments.

[0029] When one of the plate heat exchangers 2 and the water-air heat exchanger 4 fails, the other heat exchanger can continue to work, preventing the heating power valve group 6 from overheating and being damaged due to the failure of one heat exchanger. This improves the reliability of the hybrid heat dissipation power electronic equipment and extends its service life.

[0030] The first heat dissipation pipe (not shown in the figure) and the second heat dissipation pipe (not shown in the figure) are connected in series through water-cooling pipe 10 to form a heat dissipation pipe loop 23. The third heat dissipation pipe (not shown in the figure) is connected in parallel with the second heat dissipation pipe (not shown in the figure) through water-cooling pipe 10. The first cooling pipe (not shown in the figure) and the second cooling pipe (not shown in the figure) are connected in series through water-cooling pipe 10 to form a cooling pipe loop (not shown in the figure) 24. That is, the internal heat dissipation pipe loop 23 and the cooling pipe loop 24 of the hybrid heat dissipation power electronic device of this utility model are independent circulating water circuits. Therefore, while improving the heat dissipation efficiency of the hybrid heat dissipation power electronic device, the internal heat dissipation pipe loop 23 will not be affected by external contamination.

[0031] Better, such as Figure 1 As shown, the heat dissipation power valve group 6 has a three-phase structure, with the first heat dissipation pipe (not shown in the figure) of each phase valve group connected in parallel. The first heat dissipation pipe (not shown in the figure) of each group dissipates heat to the corresponding heat dissipation power valve group 6, increasing the heat dissipation contact surface between the first heat dissipation pipe (not shown in the figure) and the heat dissipation power valve group 6, resulting in good heat dissipation effect and greatly improving the heat dissipation efficiency of the heat dissipation power valve group 6.

[0032] Preferably, the cooling water machine includes a circulating water pump, a pressure tank 7, a makeup water tank 8, and a three-way valve, wherein the three-way valve includes a first three-way valve 20 and a second three-way valve 1, each having three ports.

[0033] Better, such as Figure 1 As shown, the three ports of the first three-way valve 1 are respectively connected to the first heat dissipation pipe (not shown in the figure), the second heat dissipation pipe (not shown in the figure) and the third heat dissipation pipe (not shown in the figure) through the water cooling pipe 10.

[0034] By controlling the on / off state of each port of the first three-way valve 1, the hybrid heat dissipation power electronic equipment of this invention can be controlled to perform water cooling through the plate heat exchanger 2, water-air cooling through the water-air heat exchanger 4, or both simultaneously, providing flexible and diverse heat dissipation methods. When the heat generation of the power valve group 6 is low, only the plate heat exchanger 2 or the water-air heat exchanger 4 can be activated for heat dissipation; when the heat generation of the power valve group 6 is high or the outdoor ambient temperature is high, both the plate heat exchanger 2 and the water-air heat exchanger 4 can be activated simultaneously, thereby increasing the application scenarios of the hybrid heat dissipation power electronic equipment and improving its adaptability.

[0035] Better, such as Figure 1 As shown, the hybrid heat dissipation power electronic equipment is also provided with a connecting pipe 22 in parallel with the second heat dissipation pipe (not shown in the figure). The three ports of the second three-way valve 3 are respectively connected to the first heat dissipation pipe (not shown in the figure), the first three-way valve 1 and the connecting pipe 22 through the water cooling pipe 10.

[0036] Connecting pipe 22 is connected in parallel with the second heat dissipation pipe (not shown in the figure), and a second three-way valve 3 is installed at the connection point to control the opening and closing of each port of the second three-way valve 3. When the port connected to the first three-way valve 1 is disconnected, the power electronic equipment controlling the mixed heat dissipation only circulates internally through connecting pipe 22, and the plate heat exchanger 2 and the water-air heat exchanger 4 are disconnected, which facilitates the maintenance of the plate heat exchanger 2 and the water-air heat exchanger 4.

[0037] Better, such as Figure 1 As shown, the circulating water pump 1, pressure tank 7 and water replenishment tank 8 are installed on the water cooling pipe 10 between the first heat dissipation pipe (not shown in the figure) and the connecting pipe 22.

[0038] The circulating water pump 1 increases the flow rate of water or other coolant in the closed pipeline system, so that the water or other coolant circulates repeatedly in the system, overcoming the resistance loss of the pipeline system.

[0039] Water tank 8 is used to replenish water to the closed water circulation system.

[0040] Pressure tank 7 is used in closed-loop water circulation systems to balance water volume and pressure. When the water circulation system pressure is too high, pressure tank 7 will release pressure. When the water circulation system pressure is too low, pressure tank 7 will add water or other coolant to the water circulation system through water replenishment tank 8. Two pressure tanks 7 can be configured for redundancy, so that if one pressure tank 7 fails, the other can still be used. This avoids situations where the water volume and pressure in the system cannot be controlled and balanced when one pressure tank 7 fails, thereby increasing the reliability of hybrid heat dissipation power electronic equipment.

[0041] Better, such as Figure 1 As shown, the circulating water pump includes a first circulating water pump 1 and a second circulating water pump 21, which are connected in parallel with the first circulating water pump 1. Because the second circulating water pump 21 is connected in parallel with the first circulating water pump 1, when the first circulating water pump 1 fails, the second circulating water pump 21 can be activated. This redundant configuration improves the reliability of the hybrid heat dissipation power electronic equipment.

[0042] Better, such as Figure 1 As shown, the water-air heat exchanger 4 is equipped with several fans 41. A temperature sensor is installed on the water-cooled pipe 10 between the first heat dissipation pipe (not shown in the figure) and the connecting pipe 22. A temperature sensor 50 is installed in the heating power valve group 6. The hybrid heat dissipation power electronic equipment is also equipped with a control cabinet 9 that receives the temperature signal from the temperature sensor 50 and controls the operation of the first three-way valve 1, the second three-way valve 3, the first circulating water pump 1, the second circulating water pump 21 and each fan 41 according to the received temperature signal.

[0043] Control cabinet 9 is a prior art control cabinet 9. Control cabinet 9 can control the operation of the first three-way valve 1, the second three-way valve 3, the first circulating water pump 1, the second circulating water pump 21, and each fan 41 according to the received temperature signal. The operation of the first three-way valve 1, the second three-way valve 3, the first circulating water pump 1, the second circulating water pump 21, and each fan 41 can be controlled by manually operating control cabinet 9; that is, the opening and closing of each port of the first three-way valve 1 and the second three-way valve 3 can be controlled as needed, thereby controlling the operation of internal circulation only through connecting pipe 22, or water cooling through plate heat exchanger 2, or water-air cooling through water-air heat exchanger 4, or both water cooling and water-air cooling simultaneously.

[0044] The first circulating water pump 1 can be turned on or off via control cabinet 9 as needed. If the first circulating water pump 1 fails, the second circulating water pump 21 can be turned on via control cabinet 9.

[0045] When the water-air heat exchanger 4 is turned on, the number of fans 41 that can be turned on can be manually controlled through the control cabinet 9 as needed, so as to save the operating cost of the equipment while meeting the heat dissipation requirements of the heat-generating power valve group 6.

[0046] Of course, a preset temperature can also be set in the control cabinet 9. When the preset temperature condition is reached, the control cabinet 9 will automatically control the operation of the first three-way valve 1, the second three-way valve 3, the first circulating water pump 1, the second circulating water pump 21 and each fan 41.

[0047] Better, such as Figures 1 to 3As shown, the plate heat exchanger 2 also includes a support frame 12. The second heat dissipation pipe (not shown in the figure) and the first cooling pipe (not shown in the figure) are fixed inside the support frame 12. The two ends of the second heat dissipation pipe (not shown in the figure) are a hot-side inlet 13 and a hot-side outlet 15, respectively. The two ends of the first cooling pipe (not shown in the figure) are a cold-side inlet 14 and a cold-side outlet 16, respectively. The hot-side inlet 13, the hot-side outlet 15, the cold-side inlet 14, and the cold-side outlet 16 are located on one side of the support frame 12. The outer surfaces of the second heat dissipation pipe (not shown in the figure) and the first cooling pipe (not shown in the figure) are provided with evenly arranged heat dissipation plates 11.

[0048] The second heat dissipation pipe (not shown in the figure) and the first cooling pipe (not shown in the figure) are fixed inside the support frame 12, and the fixing structure is firm and reliable. The hot-side water inlet 13, the hot-side water outlet 15, the cold-side water inlet 14, and the cold-side water outlet 16 are all located on one side of the support frame 12, which facilitates the connection of the plate heat exchanger 2 to the external water-cooled pipe 10. The outer surfaces of the second heat dissipation pipe (not shown in the figure) and the first cooling pipe (not shown in the figure) are provided with evenly arranged heat dissipation plates 11. The heat dissipation plates 11 can increase the contact surface between the second heat dissipation pipe (not shown in the figure) and the first cooling pipe (not shown in the figure) and the air, increase heat exchange, and thus increase the heat dissipation efficiency of the plate heat exchanger 2.

[0049] Better, such as Figure 2 As shown, the heat sink 11 is perpendicular to the second heat dissipation pipe (not shown) and the first cooling pipe (not shown). This perpendicular arrangement increases the gap between the heat sink 11 plates, increases the air contact surface and airflow velocity, enhances heat exchange, and thus increases the heat dissipation efficiency of the plate heat exchanger 2. Furthermore, the perpendicular arrangement of the heat sink 11 to the second heat dissipation pipe (not shown) and the first cooling pipe (not shown) makes installation convenient and aesthetically pleasing.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A power electronic device with hybrid heat dissipation, characterized in that, include: Heating power valve group, cooling water machine, water-air heat exchanger, plate heat exchanger, cooling tower, and several water-cooled pipelines; The heating power valve group is provided with a first heat dissipation pipe, the plate heat exchanger is provided with a second heat dissipation pipe and a first cooling pipe, the water-air heat exchanger is provided with a third heat dissipation pipe, and the cooling tower is provided with a second cooling pipe. The first heat dissipation pipe and the second heat dissipation pipe are connected in series through the water-cooling pipe to form a heat dissipation pipe loop. The third heat dissipation pipe is connected in parallel with the second heat dissipation pipe through the water-cooling pipe. The first cooling pipe and the second cooling pipe are connected in series through the water-cooling pipe to form a cooling pipe loop.

2. The power electronic device with hybrid heat dissipation according to claim 1, characterized in that: The heating power valve group has a three-phase structure, and the first heat dissipation pipes of each phase valve group are connected in parallel.

3. A power electronic device with hybrid heat dissipation according to claim 1, characterized in that, The cooling water machine includes a circulating water pump, a pressure tank, a water replenishment tank, and a three-way valve. The three-way valve includes a first three-way valve and a second three-way valve, each with three ports.

4. A power electronic device with hybrid heat dissipation according to claim 3, characterized in that: The three ports of the first three-way valve are respectively connected to the first heat dissipation pipe, the second heat dissipation pipe and the third heat dissipation pipe through the water cooling pipe.

5. A power electronic device with hybrid heat dissipation according to claim 3, characterized in that: The hybrid heat dissipation power electronic device is also provided with a connecting pipe in parallel with the second heat dissipation pipe. The three ports of the second three-way valve are respectively connected to the first heat dissipation pipe, the first three-way valve and the connecting pipe through the water cooling pipe.

6. A power electronic device with hybrid heat dissipation according to claim 5, characterized in that: The circulating water pump, pressure tank, and water replenishment tank are located on the water-cooled pipeline between the first heat dissipation pipeline and the connecting pipeline.

7. A power electronic device with hybrid heat dissipation according to claim 6, characterized in that: The circulating water pump includes a first circulating water pump and a second circulating water pump, with the second circulating water pump connected in parallel with the first circulating water pump.

8. A power electronic device with hybrid heat dissipation according to claim 7, characterized in that: The water-air heat exchanger is equipped with several fans. A temperature sensor is installed on the water-cooled pipe between the first heat dissipation pipe and the connecting pipe. The hybrid heat dissipation power electronic equipment is also equipped with a control cabinet that receives the temperature signal from the temperature sensor and controls the operation of the first three-way valve, the second three-way valve, the first circulating water pump, the second circulating water pump, and each of the fans according to the received temperature signal.

9. A power electronic device with hybrid heat dissipation according to claim 1, characterized in that: The plate heat exchanger also includes a support frame. The second heat dissipation pipe and the first cooling pipe are fixed in the support frame. The two ends of the second heat dissipation pipe are a hot-side water inlet and a hot-side water outlet, respectively. The two ends of the first cooling pipe are a cold-side water inlet and a cold-side water outlet, respectively. The hot-side water inlet, the hot-side water outlet, the cold-side water inlet, and the cold-side water outlet are located on one side of the support frame. The outer surfaces of the second heat dissipation pipe and the first cooling pipe are provided with uniformly arranged heat dissipation plates.

10. A power electronic device with hybrid heat dissipation according to claim 9, characterized in that: The heat sink is arranged perpendicularly to the second heat dissipation pipe and the first cooling pipe.

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