Wind power converter cooling system based on immersed IGBT evaporative cooling

Abstract

The invention provides a wind power converter cooling system based on immersed IGBT evaporative cooling. The wind power converter cooling system based on immersed IGBT evaporative cooling comprises a cabinet body, a liquid cooling bin, a steam pipeline, a liquid conveying pipeline and a condenser. According to the wind power converter cooling system based on immersed IGBT evaporative cooling, in the operation process, the IGBT modules in the multiple liquid cooling bins can generate a large amount of heat during operation, so that cooling liquid in the liquid cooling bins can absorb heat to generate phase change to generate steam, the steam moves upwards to the interior of the condenser, and therefore the cooling efficiency of the wind power converter is improved. And the steam is changed into a liquid state after releasing heat in the condenser, and is conveyed into the liquid cooling bin again through the liquid conveying pipeline. When the IGBT in the liquid cooling bin is cooled, a large amount of heat can be absorbed in a cooling liquid phase change mode, unpowered circulating cooling can be achieved, and therefore the cooling effect on the IGBT module can be effectively improved. And normal operation and use of a large module are met.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat dissipation systems, and particularly relates to a cooling system for a wind power converter based on immersion IGBT evaporation cooling. Background Art

[0002] IGBT, full name insulated gate bipolar transistor, is a three-terminal semiconductor switching device. It combines the characteristics of BJT and MOS transistor, retaining both the input characteristics of BJT and the output characteristics of MOS transistor, enabling it to play a greater role in circuit applications. IGBT is widely used in various electronic devices as an efficient and fast switch. Its core function is to switch or process complex waveforms through pulse width modulation (PWM) technology. However, a large amount of heat is generated during the operation of IGBT modules, and traditional heat dissipation methods usually adopt air cooling and water cooling. However, the above heat dissipation methods still cannot meet the heat dissipation requirements for components with large heat generation and high heat flux density, affecting the subsequent cooling effect of IGBT modules. Summary of the Invention

[0003] An embodiment of the present invention provides a cooling system for a wind power converter based on immersion IGBT evaporation cooling, aiming to solve the problem that the heat dissipation effect of the IGBT module in the existing cooling system is not ideal and affects the cooling effect.

[0004] To achieve the above object, the technical solution adopted by the present invention is: to provide a cooling system for a wind power converter based on immersion IGBT evaporation cooling, including:

[0005] A cabinet;

[0006] A plurality of liquid cooling chambers, which are arranged in sequence inside the cabinet, and IGBT modules are installed inside the liquid cooling chambers;

[0007] A steam pipeline, which is installed on the cabinet and located above the plurality of liquid cooling chambers, and the steam pipeline is communicatively connected with the tops of the plurality of liquid cooling chambers;

[0008] An infusion pipeline, which is installed on the cabinet and located below the plurality of liquid cooling chambers, and the infusion pipeline is communicatively connected with the bottoms of the plurality of liquid cooling chambers;

[0009] A condenser, which is installed on the top of the cabinet, and an air inlet pipe and a liquid outlet pipe that are communicatively connected are provided on the condenser. The air inlet pipe is communicatively connected with the steam pipeline, and the liquid outlet pipe is communicatively connected with the infusion pipeline.

[0010] In a possible implementation, an exhaust pipe for discharging the gas inside the liquid cooling chamber is connected to the top of the liquid cooling chamber, and a control valve for controlling the flow state of the exhaust pipe is installed on the exhaust pipe.

[0011] In a possible implementation, a steam outlet pipe for communicating with the steam pipe is connected to the top of the liquid cooling chamber, a regulating valve is installed on the steam outlet pipe, and a differential pressure sensor is arranged between the liquid cooling chamber and the steam pipe.

[0012] In a possible implementation, a pressure sensor is further installed on the liquid cooling chamber, and a gas safety valve is installed on the top of the steam pipe.

[0013] In a possible implementation, the condenser includes:

[0014] A condensation chamber, installed on the top of the cabinet body, the condensation chamber is inclined in the vertical direction, and the top of the condensation chamber is connected to the steam pipe, and the bottom of the condensation chamber is connected to the infusion pipe;

[0015] A heat dissipation member, installed on the condensation chamber, for reducing the temperature of the condensation chamber.

[0016] In a possible implementation, an adjusting assembly for adjusting the liquid level height inside the liquid cooling chamber is further installed on one side of the cabinet body.

[0017] In a possible implementation, the adjusting assembly includes:

[0018] An expansion tank, installed on one side of the cabinet body, the bottom of the expansion tank is connected to the infusion pipe, and the expansion tank is used for accommodating the coolant;

[0019] An air extraction pump, the air extraction end of which is connected to the expansion tank, for extracting the gas inside the expansion tank;

[0020] An air supply pump, connected to the expansion tank, for conveying gas into the expansion tank.

[0021] In a possible implementation, a guiding groove for installing the liquid cooling chamber is arranged on the cabinet body, the liquid cooling chamber is slidably arranged inside the guiding groove, and a fixing member for fixing the liquid cooling chamber to the cabinet body is further arranged on the cabinet body.

[0022] In a possible implementation, the fixing member includes two wing plates arranged perpendicular to each other, and the two wing plates are respectively fixedly installed on the outer side walls of the cabinet body and the liquid cooling chamber.

[0023] In a possible implementation, a liquid level sensor for monitoring the liquid level height inside the liquid cooling bin is installed inside the liquid cooling bin, and a flow monitor for monitoring the liquid flow rate is also installed on the liquid infusion pipeline.

[0024] In the solution shown in the embodiments of the present application, compared with the prior art, by providing a cabinet body, a plurality of liquid cooling bins are arranged in sequence along the width direction of the cabinet body inside the cabinet body. The bottoms of the plurality of liquid cooling bins are provided with liquid infusion pipelines, and the tops of the plurality of liquid cooling bins are provided with steam pipelines. A condenser is also installed on the top of the cabinet body. The intake pipe of the condenser is communicated with the steam pipeline, and the liquid outlet pipe of the condenser is communicated with the liquid infusion pipeline. An IGBT module is also installed inside the liquid cooling bin, and the inside of the liquid cooling bin is filled with a coolant. In the present application, during operation, a large amount of heat is generated when the IGBT modules inside the plurality of liquid cooling bins are operating, so that the coolant inside the liquid cooling bin absorbs heat and undergoes a phase change to generate steam. The steam moves upward into the condenser, and after releasing heat in the condenser, it becomes liquid and is re-transported into the liquid cooling bin through the liquid infusion pipeline. When cooling the IGBT inside the liquid cooling bin, a large amount of heat can be absorbed by the phase change of the coolant, and it can be cooled in a power-free cycle, thereby effectively improving the cooling effect on the IGBT module. It meets the normal operation and use of large modules. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of a wind power converter cooling system based on immersion IGBT evaporation cooling provided by an embodiment of the present invention;

[0026] Figure 2 It is a schematic installation structure diagram of a liquid cooling bin provided by an embodiment of the present invention;

[0027] Figure 3 It is a schematic internal structure diagram of a liquid cooling bin provided by an embodiment of the present invention;

[0028] Figure 4 It is a schematic connection structure diagram of a liquid cooling bin and a steam pipeline provided by an embodiment of the present invention;

[0029] Figure 5 It is a schematic structural diagram of a condenser provided by an embodiment of the present invention;

[0030] Figure 6 It is a schematic structural diagram of an adjustment component provided by an embodiment of the present invention;

[0031] Figure 7 It is a schematic fixing structure diagram of a liquid cooling bin provided by an embodiment of the present invention.

[0032] Description of the Reference Numerals:

[0033] 1. Cabinet; 2. Liquid cooling chamber; 21. Exhaust pipe; 211. Control valve; 22. Steam outlet pipe; 221. Regulating valve; 23. Pressure sensor; 24. Liquid level sensor; 3. Steam pipeline; 31. Gas safety valve; 4. Liquid delivery pipeline; 5. Condenser; 51. Condensation chamber; 52. Heat dissipation component; 6. Differential pressure sensor; 7. Adjusting component; 71. Expansion tank; 72. Air extraction pump; 73. Air supply pump; 8. Flow monitor; 9. Fixing component. Detailed implementation manners

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention 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 only used to explain the present invention and are not used to limit the present invention.

[0035] Please refer to Figures 1 to 7 , and now the wind power converter cooling system based on immersion IGBT evaporation cooling provided by the present invention will be described. The wind power converter cooling system based on immersion IGBT evaporation cooling includes a cabinet 1, a liquid cooling chamber 2, a steam pipeline 3, a liquid delivery pipeline 4 and a condenser 5. The number of liquid cooling chambers 2 is multiple, and the multiple liquid cooling chambers 2 are arranged in sequence inside the cabinet 1, and IGBT modules are installed inside the liquid cooling chambers 2; the steam pipeline 3 is installed on the cabinet 1 and is located above the multiple liquid cooling chambers 2, and the steam pipeline 3 is communicated with the tops of the multiple liquid cooling chambers 2; the liquid delivery pipeline 4 is installed on the cabinet 1 and is located below the multiple liquid cooling chambers 2, and the liquid delivery pipeline 4 is communicated with the bottoms of the multiple liquid cooling chambers 2; the condenser 5 is installed on the top of the cabinet 1, and an air inlet pipe and a liquid outlet pipe that are communicated with each other are arranged on the condenser 5, the air inlet pipe is communicated with the steam pipeline 3, and the liquid outlet pipe is communicated with the liquid delivery pipeline 4.

[0036] The wind power converter cooling system based on the immersion IGBT evaporation cooling provided by this embodiment, compared with the prior art, is provided with a cabinet body 1, and a plurality of liquid cooling chambers 2 are arranged in sequence along the width direction of the cabinet body 1 inside the cabinet body 1. An infusion pipeline 4 is installed at the bottom of the plurality of liquid cooling chambers 2, and a steam pipeline 3 is installed at the top of the plurality of liquid cooling chambers 2. A condenser 5 is also installed at the top of the cabinet body 1. The intake pipe of the condenser 5 is communicated with the steam pipeline 3, and the liquid outlet pipe of the condenser 5 is communicated with the infusion pipeline 4. An IGBT module is also installed inside the liquid cooling chamber 2, and a coolant is filled inside the liquid cooling chamber 2. In this application, during operation, a large amount of heat will be generated when the IGBT modules inside the plurality of liquid cooling chambers 2 are operating, so that the coolant inside the liquid cooling chamber 2 absorbs heat and undergoes a phase change to generate steam. The steam moves upward into the condenser 5, and after releasing heat inside the condenser 5, it becomes liquid and is re-transported into the liquid cooling chamber 2 through the infusion pipeline 4. When cooling the IGBT inside the liquid cooling chamber 2, a large amount of heat can be absorbed by the phase change of the cooling liquid, and it can be cooled by a non-powered cycle, thereby effectively improving the cooling effect on the IGBT module. It meets the normal operation and use of large modules.

[0037] Specifically, in this embodiment, two hollow plates for installing IGBT modules are installed inside the liquid cooling chamber 2. The hollow plates are arranged parallel to each other at intervals, and IGBT modules are installed on both sides of the hollow plates. The steam generated during operation can be discharged to the top of the liquid cooling chamber 2 through the holes on the hollow plates and transported into the steam pipeline 3.

[0038] Preferably, in this embodiment, a cover plate is detachably installed on one side of the liquid cooling chamber 2. When the cover plate is installed on the liquid cooling chamber 2, the cover plate is hermetically connected to the liquid cooling chamber 2, and a plurality of busbars are hermetically installed on the cover plate. The busbars are used to electrically connect the IGBT module to other external electrical components. Thus, it is convenient for the installation and disassembly of the IGBT module.

[0039] In some embodiments, the above-mentioned liquid cooling chamber 2 can adopt a structure as shown in Figure 3 、 Figure 4 Shown structure. See also Figure 3 、 Figure 4, an exhaust pipe 21 for discharging the gas inside the liquid cooling chamber 2 is connected to the top of the liquid cooling chamber 2, and a control valve 211 for controlling the flow state of the exhaust pipe 21 is installed on the exhaust pipe 21. An exhaust pipe 21 is connected to the top of the liquid cooling chamber 2, and a control valve 211 is installed on the exhaust pipe 21. When adding coolant to the inside of the liquid cooling chamber 2, the control valve 211 can be opened to discharge the air inside the liquid cooling chamber 2. At the same time, during operation, the inside of the liquid cooling chamber 2 maintains a negative pressure state. Before operation, after connecting an external negative pressure device to the exhaust pipe 21, the air inside the liquid cooling chamber 2 can be extracted, so that the inside of the liquid cooling chamber 2 becomes a negative pressure device. After the suction is completed, the control valve 211 is closed, so that the inside of the liquid cooling chamber 2 always maintains a negative pressure state. When the liquid cooling chamber 2 is in a negative pressure state, the boiling point of the coolant inside the liquid cooling chamber 2 can be reduced, thereby reducing the temperature at which the coolant undergoes a phase change, and further accelerating the heat absorption effect on the IGBT module.

[0040] Optionally, in this embodiment, during operation, the control valve 211 on the exhaust pipe 21 can be opened to increase the temperature inside the liquid cooling chamber 2. After rising to a certain temperature, the control valve 211 on the exhaust pipe 21 is closed to reduce the temperature inside the liquid cooling chamber 2, and according to the change of temperature, the inside of the liquid cooling chamber 2 becomes a negative pressure state.

[0041] In this embodiment, control valves 211 for controlling the flow state are provided at the connection points between the liquid cooling chamber 2 and the steam pipe 3 and the liquid delivery pipe 4, and a temperature sensor for monitoring the temperature inside the liquid cooling chamber 2 is also provided on the liquid cooling chamber 2.

[0042] In some embodiments, the above-mentioned liquid cooling chamber 2 can adopt a structure such as Figure 3 , Figure 4 shown. Referring to Figure 3 , Figure 4 together, an outlet pipe 22 for communicating with the steam pipe 3 is connected to the top of the liquid cooling chamber 2, a regulating valve 221 is installed on the outlet pipe 22, and a differential pressure sensor 6 is provided between the liquid cooling chamber 2 and the steam pipe 3. Through the setting of the differential pressure sensor 6 and the regulating valve 221, the opening degree of the regulating valve 221 on the outlet pipe 22 at the top of the liquid cooling chamber 2 can be adjusted according to the monitored pressure difference signal between the inside of the liquid cooling chamber 2 and the inside of the steam pipe 3, so as to ensure the stable circulation inside the whole circulation system and the stability of the internal pressure of the whole system, ensure that the steam generated inside multiple liquid cooling chambers 2 can be effectively conveyed upward, and stabilize the stability of the liquid level inside each liquid cooling chamber 2. At the same time, the pressure inside the liquid cooling chamber 2 can be stabilized, avoiding excessive pressure from affecting the normal use and service life of the liquid cooling chamber 2, and ensuring the stability of the operation of the whole system.

[0043] Specifically, in this embodiment, a pressure sensor 23 for monitoring the pressure inside the liquid cooling chamber 2 is also installed on the liquid cooling chamber 2.

[0044] In some embodiments, the above-mentioned steam pipe 3 may adopt a structure as shown in Figure 3 , Figure 5 . Referring to Figure 3 and Figure 5 together, a pressure sensor 23 is further installed on the liquid cooling chamber 2, and a gas safety valve 31 is installed at the top of the steam pipe 3. A gas safety valve 31 is also installed on the steam pipe 3, and a pressure sensor 23 for detecting the internal pressure of the liquid cooling chamber 2 is installed on each liquid cooling chamber 2. When the internal pressure of the liquid cooling chamber 2 exceeds the design value, an alarm signal can be sent, facilitating the later operators to make timely adjustments. And a gas safety valve 31 is installed at the top of the steam pipe 3, which can automatically open through the gas safety valve 31 to complete the pressure relief operation when the internal pressure of the entire circulation system exceeds the limit, improving the stability of the whole system during operation.

[0045] In some embodiments, the above-mentioned condenser 5 may adopt a structure as shown in Figure 5 . Referring to Figure 5 , the condenser 5 includes a condensation chamber 51 and a heat dissipation member 52. The condensation chamber 51 is installed at the top of the cabinet 1. The condensation chamber 51 is inclined in the vertical direction, and the top of the condensation chamber 51 is communicated with the steam pipe 3, and the bottom of the condensation chamber 51 is communicated with the liquid infusion pipe 4; the heat dissipation member 52 is installed on the condensation chamber 51 for reducing the temperature of the condensation chamber 51. The condensation chamber 51 is inclined along its length direction. The steam pipe 3 is communicated with the higher end of the condensation chamber 51, and the liquid infusion pipe 4 is communicated with the lower end of the condensation chamber 51. The steam generated inside the liquid cooling chamber 2 is transported to the top of the condensation chamber 51 through the steam pipe 3, and after cooling in the condensation chamber 51, it condenses into liquid coolant. The liquid coolant flows downward due to its own gravity and is re-transported to the inside of the liquid cooling chamber 2. The circulation of the coolant is realized.

[0046] Specifically, in this embodiment, by arranging the condensation chamber 51 obliquely, on the one hand, it can facilitate the circulation of the coolant. At the same time, the steam is located above the condensation chamber 51, and effective heat dissipation can be obtained. After the steam is condensed into liquid, it is transported to the inside of the liquid cooling chamber 2 through the liquid infusion pipe 4 according to its own gravity, which can prevent the steam from being re-sent to the inside of the liquid cooling chamber 2 before liquefaction, affecting the later cooling effect of the IGBT.

[0047] Preferably, in this embodiment, the heat dissipation member 52 is a heat dissipation fan. The number of heat dissipation fans is multiple, and the multiple heat dissipation fans are arranged at intervals along the length direction of the condensation chamber 51 for accelerating the heat dissipation effect of the condensation chamber 51. The condensation chamber 51 is assembled by a plurality of fins. Flow channels for the coolant to flow through are arranged inside the fins. The plurality of fins are arranged at intervals, thereby increasing the heat dissipation area for the coolant and improving the heat dissipation effect on the coolant.

[0048] Preferably, in this embodiment, pressure sensors 23 are installed at both the input end and the output end of the condensation chamber 51 to monitor the pressures at the input end and the output end of the condensation chamber 51 and avoid the phenomenon of backflow.

[0049] In some embodiments, the above-mentioned liquid cooling chamber 2 may adopt a structure as shown in Figure 1 , Figure 6 . Referring to Figure 1 , Figure 6 , an adjusting assembly 7 for adjusting the liquid level height inside the liquid cooling chamber 2 is further installed on one side of the cabinet body 1. A liquid level sensor 24 for monitoring the liquid level height inside the liquid cooling chamber 2 is arranged inside the liquid cooling chamber 2. The liquid level sensor 24 is provided to monitor the liquid level inside the liquid cooling chamber 2. When the liquid level inside the liquid cooling chamber 2 is too low, the liquid level sensor 24 will feedback a signal, and the liquid will be conveyed into the liquid cooling chamber 2 through the adjusting assembly 7 to ensure a stable liquid level inside the liquid cooling chamber 2, so that the IGBT module can always be immersed in the coolant. At the same time, when the coolant liquid level is too high, the coolant can also be pumped out of the system through the adjusting assembly 7 to keep the liquid level inside the liquid cooling chamber 2 stable and avoid affecting the subsequent gas-liquid circulation.

[0050] In some embodiments, the above-mentioned adjusting assembly 7 may adopt a structure as shown in Figure 6 . Referring to Figure 6 , the adjusting assembly 7 includes an expansion tank 71, an air extraction pump 72 and an air supply pump 73. The expansion tank 71 is installed on one side of the cabinet body 1. The bottom of the expansion tank 71 is connected to the liquid infusion pipeline 4. The expansion tank 71 is used to accommodate the coolant. The air extraction end of the air extraction pump 72 is connected to the expansion tank 71 and is used to extract the gas inside the expansion tank 71. The air supply pump 73 is connected to the expansion tank 71 and is used to convey gas into the expansion tank 71. The expansion pipe is installed on one side of the cabinet body 1. Both the air extraction pump 72 and the air supply pump 73 are connected to the top of the expansion pipe. And solenoid valves are arranged at the connection positions. The bottom of the expansion tank 71 is connected to the liquid infusion pipeline 4. When it is necessary to add liquid to the system, the air supply pump 73 can be used to convey liquid into the expansion tank 71, and the pressure inside the expansion tank 71 increases, so that the liquid inside the expansion tank 71 is conveyed into the system. When there is too much liquid inside the system, the liquid inside the expansion tank 71 can be pumped out through the air extraction pump 72, so that the pressure inside the expansion tank 71 can be reduced to pump out the liquid inside the system. The structure is simple and the operation is convenient, and the liquid content inside the system can be controlled by the air extraction pump 72 and the air supply pump 73.

[0051] Preferably, in this embodiment, the height of the connection between the expansion tank 71 and the infusion pipeline 4 is located in the middle of the liquid cooling chamber 2, so that when the liquid is transported into the expansion tank 71, the liquid can fill the inside of the liquid cooling chamber 2. At the same time, a valve is provided at the connection between the expansion tank 71 and the infusion pipeline 4 to prevent the liquid from flowing between the expansion tanks 71 due to the change of the internal pressure of the system during normal operation, which affects the balance of the liquid inside the system.

[0052] Specifically, in this embodiment, the air extraction pump 72 and the air supply pump 73 adopt diaphragm pumps.

[0053] In some embodiments, the above-mentioned liquid cooling chamber 2 can adopt the structure as Figure 7 shown. Refer to Figure 7 The cabinet 1 is provided with a guiding groove for installing the liquid cooling chamber 2, the liquid cooling chamber 2 is slidably arranged inside the guiding groove, and the cabinet 1 is also provided with a fixing member 9 for fixing the liquid cooling chamber 2 to the cabinet 1. The cabinet 1 is provided with a guiding groove for installing the liquid cooling chamber 2, and the liquid cooling chamber 2 is slidably arranged inside the guiding groove. It is convenient for the disassembly and installation of the liquid cooling chamber 2. The liquid cooling chamber 2 is slidably arranged on the cabinet 1 and the installation position of the liquid cooling chamber 2 is positioned through the guiding of the guiding groove. A fixing member 9 is also arranged between the liquid cooling chamber 2 and the cabinet 1. After the liquid cooling chamber 2 is pushed into the guiding groove, the liquid cooling chamber 2 can be fixed to the cabinet 1 through the fixing member 9. The modular installation method is convenient for disassembly and assembly during later maintenance.

[0054] Preferably, in this embodiment, a connecting pipe communicating with the infusion pipeline 4 is installed at the bottom of the liquid cooling chamber 2, and a valve connected to the connecting pipe is arranged on the infusion pipeline 4. When a single liquid cooling chamber 2 is disassembled and maintained, the liquid inside the system can be prevented from flowing out by closing the valve. The disassembly and installation are more convenient and convenient.

[0055] Preferably, in this embodiment, a plurality of top beams are fixedly installed on the top of the liquid cooling chamber 2 by bolts. The plurality of top beams are installed on the top of the liquid cooling chamber 2 and are fixedly installed on the top of the cabinet 1 by bolts. A space for avoiding the pipelines and electrical components on the top of the liquid cooling chamber 2 is arranged between two adjacent top beams. During later disassembly and assembly, the liquid cooling chamber 2 can be withdrawn from the guiding groove after separating the top beams from the liquid cooling chamber 2.

[0056] In some embodiments, the above-mentioned fixing member 9 can adopt the structure as Figure 7 shown. Refer to Figure 7, the fixing member 9 includes two wing plates arranged perpendicular to each other, and the two wing plates are respectively fixedly installed on the outer side walls of the cabinet 1 and the liquid cooling chamber 2. The fixing member 9 is integrally formed by bending a steel plate. The fixing member 9 includes two mutually perpendicular wing plates, and the two wing plates are respectively fixedly installed on the side wall of the liquid cooling chamber 2 and the cabinet 1 through bolts and are located at the end of the guiding groove close to the outer side of the cabinet 1. The structure is simple and convenient for the later disassembly and assembly of the liquid cooling chamber 2.

[0057] In some embodiments, the above-mentioned liquid cooling chamber 2 can adopt a structure such as Figure 3 , Figure 6 shown. Referring to Figure 3 , Figure 6 together, a liquid level sensor 24 for monitoring the liquid level height inside the liquid cooling chamber 2 is installed inside the liquid cooling chamber 2, and a flow monitor 8 for monitoring the liquid flow rate is also installed on the infusion pipeline 4. A liquid level sensor 24 is installed inside the liquid cooling chamber 2, and a flow monitor 8 is installed on the infusion pipeline 4. The height of the flow monitor 8 is lower than the normal liquid level height inside the liquid cooling chamber 2. The flow monitor 8 is used to monitor the flow rate of the liquid flowing back into the liquid cooling chamber 2, and the opening degrees of the valves on each pipeline are adjusted according to the values fed back by the liquid level sensor and the flow monitor 8 to meet the stability of the coolant circulation of the entire system. When it is monitored that the liquid level height inside the liquid cooling chamber 2 is too low and the flow rate monitored by the flow monitor 8 decreases, the condensation speed of the steam decreases at this time, and it is necessary to increase the cooling efficiency of the condenser 5. To ensure that the steam can be quickly condensed and flow back into the liquid cooling chamber 2, the cooling member 52 can be controlled by the controller to be in a working state to increase the cooling efficiency of the condenser 5. When the liquid level height inside the liquid cooling chamber 2 is relatively high, the cooling member 52 can be turned off by the controller, and the outside air can be used to achieve a stable condensation effect, achieving the effect of energy conservation and consumption reduction.

[0058] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cooling system for a wind power converter based on the evaporation cooling of an immersed IGBT, characterized in that, Comprising: Cabinet body (1); Liquid cooling chambers (2), with a plurality of them, and the plurality of liquid cooling chambers (2) are arranged in sequence inside the cabinet body (1), and IGBT modules are installed inside the liquid cooling chambers (2); Steam pipeline (3), installed on the cabinet body (1) and located above the plurality of liquid cooling chambers (2), and the steam pipeline (3) is communicatively connected to the tops of the plurality of liquid cooling chambers (2); Liquid infusion pipeline (4), installed on the cabinet body (1) and located below the plurality of liquid cooling chambers (2), and the liquid infusion pipeline (4) is communicatively connected to the bottoms of the plurality of liquid cooling chambers (2); Condenser (5), installed on the top of the cabinet body (1), and an intake pipe and a liquid outlet pipe that are communicatively connected are provided on the condenser (5), the intake pipe is communicatively connected to the steam pipeline (3), and the liquid outlet pipe is communicatively connected to the liquid infusion pipeline (4).

2. The cooling system for a wind power converter based on immersion IGBT evaporation cooling according to claim 1, characterized in that, An exhaust pipe (21) for discharging the gas inside the liquid cooling chamber (2) is communicatively connected to the top of the liquid cooling chamber (2), and a control valve (211) for controlling the flow state of the exhaust pipe (21) is installed on the exhaust pipe (21).

3. The cooling system for a wind power converter based on the evaporative cooling of an immersion IGBT as claimed in claim 1, wherein A steam outlet pipe (22) for communicatively connecting with the steam pipeline (3) is communicatively connected to the top of the liquid cooling chamber (2), a regulating valve (221) is installed on the steam outlet pipe (22), and a differential pressure sensor (6) is provided between the liquid cooling chamber (2) and the steam pipeline (3).

4. The cooling system for a wind power converter based on the evaporative cooling of an immersed IGBT as claimed in claim 3, wherein A pressure sensor (23) is also installed on the liquid cooling chamber (2), and a gas safety valve (31) is installed on the top of the steam pipeline (3).

5. The cooling system for a wind power converter based on the evaporative cooling of an immersed IGBT as claimed in claim 1, wherein, The condenser (5) includes: Condensing chamber (51), installed on the top of the cabinet body (1), the condensing chamber (51) is inclined in the vertical direction, and the top of the condensing chamber (51) is communicatively connected to the steam pipeline (3), and the bottom of the condensing chamber (51) is communicatively connected to the liquid infusion pipeline (4); Heat dissipation member (52), installed on the condensing chamber (51) for reducing the temperature of the condensing chamber (51).

6. The cooling system for a wind power converter based on evaporative cooling of an immersed IGBT as claimed in claim 1, wherein An adjusting assembly (7) for adjusting the liquid level height inside the liquid cooling chamber (2) is also installed on one side of the cabinet body (1).

7. The cooling system for a wind power converter based on the evaporative cooling of an immersed IGBT as described in claim 6, wherein, The adjusting assembly (7) includes: Expansion tank (71), installed on one side of the cabinet body (1), the bottom of the expansion tank (71) is communicatively connected to the liquid infusion pipeline (4), and the expansion tank (71) is used for accommodating coolant; Air extraction pump (72), the air extraction end of which is communicatively connected to the expansion tank (71) for extracting the gas inside the expansion tank (71); Air supply pump (73), communicatively connected to the expansion tank (71) for supplying gas into the expansion tank (71).

8. The cooling system for a wind power converter based on the evaporative cooling of an immersed IGBT according to claim 1, wherein A guiding groove for installing the liquid cooling chamber (2) is provided on the cabinet body (1), the liquid cooling chamber (2) is slidably arranged inside the guiding groove, and a fixing member (9) for fixing the liquid cooling chamber (2) to the cabinet body (1) is also provided on the cabinet body (1).

9. The cooling system for a wind power converter based on the evaporative cooling of an immersion IGBT as claimed in claim 8, wherein The fixing member (9) includes two wing plates arranged perpendicular to each other, and the two wing plates are respectively fixedly installed on the outer side walls of the cabinet body (1) and the liquid cooling chamber (2).

10. The cooling system for a wind power converter based on the evaporative cooling of an immersed IGBT according to claim 6, characterized in that, A liquid level sensor (24) for monitoring the liquid level inside the liquid cooling chamber (2) is installed inside the liquid cooling chamber (2), and a flow monitor (8) for monitoring the liquid flow rate is also installed on the infusion pipeline (4).

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