Liquid cooling circulation system based on immersed IGBT evaporative cooling

Abstract

The utility model provides a liquid cooling circulation system based on evaporative cooling of an immersed IGBT (Insulated Gate Bipolar Translator). The liquid cooling circulation system based on evaporative cooling of the immersed IGBT comprises a liquid cooling box and a condenser. According to the utility model, the liquid cooling box and the condenser are arranged, the condenser is installed below the liquid cooling box, the condenser and the liquid cooling box are communicated with each other, and the IGBT module is installed in the liquid cooling box. Cooling liquid used for cooling the IGBT module is arranged in the liquid cooling box. And an air outlet in the top of the liquid cooling box is communicated with an air inlet of the condenser. A liquid inlet in the bottom of the liquid cooling box communicates with a liquid outlet of the condenser. In the working process, after the IGBT module in the liquid cooling box generates heat, cooling liquid is boiled to generate steam, the steam enters the condenser to be cooled and then is condensed into cooling liquid, and the cooling liquid returns to the liquid cooling box again to cool the IGBT module. Therefore, the circulating cooling effect is achieved. And the cooling effect on the IGBT module can be effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of electrical component heat dissipation technology, specifically relating to a liquid cooling circulation system based on immersion IGBT evaporative cooling. Background Technology

[0002] With the increasing size of wind turbine generators and changes in application environments, the heat generation of components inevitably increases, heat flux density rises, and environmental heat dissipation conditions deteriorate. Guided by the "dual-carbon" strategic goal, solving the heat dissipation challenges arising from larger generator sizes and harsher operating environments, and ensuring the normal and stable operation of the units, has become a key issue for the further development of wind turbine generators. Currently, most component cooling methods rely on air cooling and liquid cooling, but these methods are insufficient to meet the cooling needs of increasingly larger generators, thus affecting the normal operation of the units. Utility Model Content

[0003] This utility model provides a liquid cooling circulation system based on immersion IGBT evaporative cooling, which aims to solve the problem of poor heat dissipation of heat-generating components in large-scale machines in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a liquid cooling circulation system based on immersion IGBT evaporative cooling, comprising:

[0005] The liquid cooling box, at least one in number, is provided with an air outlet at the top and a liquid inlet at the bottom;

[0006] A condenser is installed above the liquid cooling tank. The condenser includes an inlet end and a outlet end. The inlet end is connected to the outlet end of the liquid cooling tank, and the outlet end is connected to the inlet end of the liquid cooling tank. The height of the inlet end of the condenser is higher than the height of the outlet end.

[0007] In one possible implementation, the condenser is inclined in the vertical direction.

[0008] In one possible implementation, the condenser includes:

[0009] A condensation chamber, wherein both the air inlet and the liquid outlet are connected to the condensation chamber;

[0010] A cooling fan is installed on the condensation chamber to improve its heat dissipation effect.

[0011] In one possible implementation, the condensation chamber includes a plurality of spaced-apart heat sinks, the top ends of which are connected to the air inlet and the bottom ends of which are connected to the liquid outlet.

[0012] In one possible implementation, a differential pressure sensor is also provided at the air inlet of the liquid cooling box and the condenser.

[0013] In one possible implementation, a filter is also provided between the liquid outlet of the condenser and the liquid inlet of the liquid cooling tank.

[0014] In one possible implementation, the liquid inlet of the liquid cooling box is connected to the liquid outlet of the condenser via a return pipe, and a liquid level stabilizing device is installed on the return pipe.

[0015] In one possible implementation, the liquid level stabilizing device includes:

[0016] An expansion tank, with its bottom connected to the reflux pipe;

[0017] A gas pump, connected to the top of the expansion tank, is used to deliver gas into the expansion tank;

[0018] An air pump, connected to the top of the expansion tank, is used to extract gas from inside the expansion tank.

[0019] In one possible implementation, the outlet of the liquid cooling box is connected to the inlet of the condenser by a vent pipe, the top of the vent pipe is connected to a gas safety valve, and a liquid level sensor is installed on the liquid cooling box.

[0020] The solution shown in this application, compared with the prior art, incorporates a liquid cooling box and a condenser. The condenser is installed below the liquid cooling box and is interconnected with it. The IGBT module is installed inside the liquid cooling box. Coolant for cooling the IGBT module is also provided inside the liquid cooling box. The air outlet at the top of the liquid cooling box is connected to the air inlet of the condenser. The liquid inlet at the bottom of the liquid cooling box is connected to the liquid outlet of the condenser. During operation, the heat generated by the IGBT module inside the liquid cooling box causes the coolant to boil and produce steam. The steam enters the condenser for cooling and condenses back into coolant, returning to the liquid cooling box to cool the IGBT module, thus achieving a circulating cooling effect. Furthermore, the evaporation of the coolant can remove a large amount of heat dissipated by the IGBT, effectively improving the cooling effect on the IGBT module. Attached Figure Description

[0021] Figure 1 A schematic diagram of the structure of a liquid cooling circulation system based on immersion IGBT evaporative cooling provided for an embodiment of this utility model;

[0022] Figure 2 A partial view of the internal structure of the condensation chamber provided in an embodiment of this utility model;

[0023] Figure 3This is a schematic diagram of the liquid level stabilization device provided in an embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Liquid cooling box; 111. Gas safety valve; 2. Condenser; 21. Condensation chamber; 211. Heat sink; 22. Cooling fan; 3. Differential pressure sensor; 4. Filter; 5. Liquid level stabilizing device; 51. Expansion tank; 52. Gas pump; 53. Suction pump. Detailed Implementation

[0026] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] Please refer to the following: Figures 1 to 3 The present invention provides a liquid cooling circulation system based on immersion IGBT evaporative cooling. The liquid cooling circulation system includes a liquid cooling tank 1 and a condenser 2. There is at least one liquid cooling tank 1. The top of the liquid cooling tank 1 has an air outlet, and the bottom of the liquid cooling tank 1 has a liquid inlet. The condenser 2 is installed above the liquid cooling tank 1. The condenser 2 includes an air inlet and a liquid outlet. The air inlet is connected to the air outlet of the liquid cooling tank 1, and the liquid outlet is connected to the liquid inlet of the liquid cooling tank 1. The height of the air inlet on the condenser 2 is higher than the height of the liquid outlet.

[0028] The liquid cooling circulation system based on immersion IGBT evaporative cooling provided in this embodiment, compared with the prior art, features a liquid cooling tank 1 and a condenser 2. The condenser 2 is installed below the liquid cooling tank 1 and is interconnected with it. The IGBT module is installed inside the liquid cooling tank 1. Coolant for cooling the IGBT module is also provided inside the liquid cooling tank 1. The air outlet at the top of the liquid cooling tank 1 is connected to the air inlet of the condenser 2. The liquid inlet at the bottom of the liquid cooling tank 1 is connected to the liquid outlet of the condenser 2. During operation, the heat generated by the IGBT module inside the liquid cooling tank 1 causes the coolant to boil and produce steam. The steam enters the condenser, cools down, condenses back into coolant, and returns to the liquid cooling tank 1 to cool the IGBT module, thus achieving a circulating cooling effect. The evaporation of the coolant removes a large amount of heat dissipated by the IGBT, effectively improving the cooling effect on the IGBT module.

[0029] Specifically, in this embodiment, the coolant is a fluorinated liquid.

[0030] In some embodiments, the condenser 2 described above may employ, for example... Figure 1 The structure shown. See also Figure 1 The condenser 2 is inclined vertically. It is positioned at the bottom of the liquid cooling tank 1, with the liquid outlet at the bottom and above it. The air inlet is located at the top. During operation, the steam generated inside the liquid cooling tank 1 rises and flows into the condenser 2, where it is cooled. The condensed liquid then moves to the bottom of the condenser 2 under its own weight, preventing it from flowing out from the air inlet. Simultaneously, the condensed liquid falls back into the liquid cooling tank 1 under its own weight, reducing power consumption and thus saving energy.

[0031] In some embodiments, the condenser 2 described above may employ, for example... Figure 1 The structure shown. See also Figure 1 The condenser 2 includes a condensation chamber 21 and a cooling fan 22. Both the air inlet and the liquid outlet are connected to the condensation chamber 21. The cooling fan 22 is installed on the condensation chamber 21 to improve its heat dissipation effect. The condensation chamber 21 is inclined above the liquid cooling tank 1. Multiple cooling fans 22 are also installed above the condensation chamber 21 to blow cold air into it, thereby cooling the vapor inside the condensation chamber 21 and condensing it into liquid, thus improving the vapor condensation efficiency.

[0032] In some embodiments, the condensation chamber 21 described above can be adopted as follows: Figure 1 , Figure 2 The structure shown. See also... Figure 1 , Figure 2 The condensation chamber 21 includes multiple spaced-apart heat sinks 211. The top ends of each heat sink 211 are connected to the air inlet, and the bottom ends of each heat sink 211 are connected to the liquid outlet. Each heat sink 211 has a condensation groove for steam or liquid flow, with the groove extending along the length of the heat sink 211. The top ends of the condensation grooves on each heat sink 211 are connected to the air inlet, and the bottom ends of the condensation grooves are connected to the liquid outlet. The spaced-apart arrangement of the heat sinks increases the airflow area, thereby enhancing the heat dissipation effect on the liquid. This ensures that steam flowing into the condensation chamber 21 is rapidly cooled.

[0033] In some embodiments, the liquid cooling tank 1 and the condenser 2 can be adopted as follows: Figure 1 , Figure 3 The structure shown. See also... Figure 1 , Figure 3A differential pressure sensor 3 is also installed at the air inlet of the liquid cooling box 1 and the condenser 2. The two detection terminals of the differential pressure sensor 3 are respectively connected to the top of the liquid cooling box 1 and the air inlet of the condenser 2. It can detect the pressure difference between the gas inside the condenser box and the gas inside the condenser 2. When the pressure difference is large, the output and input can be adjusted by adjusting the valve located at the air outlet or the liquid inlet of the condenser box to ensure the pressure balance inside the condenser box and the condenser 2.

[0034] Specifically, in this embodiment, regulating valves for adjusting flow rate are provided on both the air outlet and the liquid inlet of the liquid cooling tank 1.

[0035] In some embodiments, the condenser 2 and the liquid cooling box 1 described above can be adopted as follows: Figure 3 The structure shown. See also Figure 3 A filter 4 is also installed between the liquid outlet of the condenser 2 and the liquid inlet of the liquid cooling tank 1. A filter 4 is also installed behind the liquid outlet of the condenser 2. The filter 4 is used to filter out impurities from the liquid, preventing impurities from entering the liquid cooling tank 1 and affecting the heat dissipation of the IGBT module. It also helps maintain the cleanliness of the inside of the liquid cooling tank 1, reducing future maintenance.

[0036] In some embodiments, the liquid cooling box 1 described above can be as follows: Figure 3 The structure shown. See also Figure 3 The liquid inlet of the liquid cooling tank 1 is connected to the liquid outlet of the condenser 2 by a return pipe, and a liquid level stabilizing device 5 is installed on the return pipe. The liquid level stabilizing device 5 is used to stabilize the liquid level inside the liquid cooling tank 1, so that the liquid level inside the liquid cooling tank 1 remains stable, thereby ensuring that the IGBT module is always immersed in the coolant and ensuring the stability of the cooling of the IGBT module.

[0037] In some embodiments, the liquid level stabilizing device 5 described above can be as follows: Figure 3 The structure shown. See also Figure 3The liquid level stabilization device 5 includes an expansion tank 51, an air pump 52, and an air suction pump 53. The bottom of the expansion tank 51 is connected to the return pipe; the air pump 52 is connected to the top of the expansion tank 51 and is used to supply gas into the expansion tank 51; the air suction pump 53 is connected to the top of the expansion tank 51 and is used to extract gas from the expansion tank 51. A liquid level sensor is installed on the liquid cooling tank 1 to detect the liquid level inside the liquid cooling tank 1. Solenoid valves are installed at the connections between the air pump 52, the air suction pump 53, and the expansion tank 51. When the liquid level inside the liquid cooling tank 1 is high, the air suction pump 53 can be turned on to extract air from the expansion tank 51, thereby reducing the amount of coolant inside the liquid cooling tank 1. When the liquid level inside the liquid cooling tank 1 is low, the air pump 52 can be used to supply gas into the expansion tank 51 to transfer the coolant from the expansion tank to the liquid cooling tank. The expansion tank 51 allows for free adjustment of the liquid level inside the liquid cooling tank, thereby ensuring the stability of the entire circulation system.

[0038] Preferably, in this embodiment, the bottom of the expansion tank 51 is connected to the return pipe, and the height of the expansion tank 51 is higher than the height of the liquid cooling tank 1. The top of the expansion tank 51 is connected to the air pump 52 and the suction pump 53. A certain amount of coolant can be stored inside the expansion tank 51, and coolant can be replenished into the liquid cooling tank 1 through the coolant inside the expansion tank 51.

[0039] Specifically, in this embodiment, both the air pump 52 and the air suction pump 53 are diaphragm pumps, and a one-way valve is installed on the connecting pipeline to the expansion tank 51.

[0040] In some embodiments, the liquid cooling box 1 described above can be as follows: Figure 1 The structure shown. See also Figure 1 The outlet of the liquid cooling tank 1 is connected to the inlet of the condenser 2 by a vent pipe, and a gas safety valve 111 is connected to the top of the vent pipe. A liquid level sensor is installed on the liquid cooling tank 1. The gas safety valve 111 is installed at the top of the vent pipe, and a liquid level sensor is installed inside the liquid cooling tank 1. The liquid level sensor monitors the liquid level inside the liquid cooling tank 1. When the liquid level is too low, coolant needs to be added to the liquid cooling tank 1. When the internal pressure of the entire system is too high, the gas safety valve 111 will automatically open, improving the stability of the entire system during operation.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A liquid cooling circulation system based on immersion IGBT evaporative cooling, characterized in that, include: A liquid cooling box (1), at least one in number, is provided with an air outlet at the top of the liquid cooling box (1) and a liquid inlet at the bottom of the liquid cooling box (1); A condenser (2) is installed above the liquid cooling box (1). The condenser (2) includes an air inlet and a liquid outlet. The air inlet is connected to the air outlet of the liquid cooling box (1), and the liquid outlet is connected to the liquid inlet of the liquid cooling box (1). The height of the air inlet on the condenser (2) is higher than the height of the liquid outlet.

2. The immersion-based IGBT vapor-cooled liquid cooling system of claim 1, wherein, The condenser (2) is inclined in the vertical direction.

3. The immersion-based IGBT vapor-cooled liquid cooling system of claim 1 or 2, wherein, The condenser (2) includes: The condensation chamber (21) has both the air inlet and the liquid outlet connected to it. A cooling fan (22) is installed on the condensation chamber (21) to improve the heat dissipation effect of the condensation chamber (21).

4. The immersion-based IGBT vapor-cooled liquid cooling system of claim 3, wherein, The condensation chamber (21) includes a plurality of spaced heat sinks (211), the top of each heat sink (211) being connected to the air inlet, and the bottom of each heat sink (211) being connected to the liquid outlet.

5. The immersion-based IGBT vapor-cooled liquid cooling system of claim 1, wherein, Differential pressure sensors (3) are also installed at the air inlet ends of the liquid cooling box (1) and the condenser (2).

6. The immersion-based IGBT vapor-cooled liquid cooling system of claim 1, wherein, A filter (4) is also provided between the liquid outlet of the condenser (2) and the liquid inlet of the liquid cooling box (1).

7. The immersion-based IGBT vapor-cooled liquid cooling system of claim 5, wherein, The liquid inlet of the liquid cooling box (1) is connected to the liquid outlet of the condenser (2) by a return pipe, and a liquid level stabilizing device (5) is installed on the return pipe.

8. The immersion-based IGBT vapor-cooled liquid cooling system of claim 7, wherein, The liquid level stabilizing device (5) includes: An expansion tank (51) is provided with its bottom connected to the reflux pipe; A gas pump (52) is connected to the top of the expansion tank (51) and is used to deliver gas into the expansion tank (51); An air pump (53) is connected to the top of the expansion tank (51) and is used to extract gas from inside the expansion tank (51).

9. The immersion-based IGBT vapor-cooled liquid cooling system of claim 1, wherein, The outlet of the liquid cooling box (1) is connected to the inlet of the condenser (2) by a vent pipe, and a gas safety valve (111) is connected to the top of the vent pipe. A liquid level sensor is installed on the liquid cooling box (1).

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