Water-cooling turbulent flow heat dissipation device for IGBT (Insulated Gate Bipolar Translator)

Abstract

The utility model discloses a water-cooling turbulent flow heat dissipation device used for an IGBT, and relates to the technical field of electrical module water-cooling heat dissipation. The water-cooling turbulent flow heat dissipation device used for the IGBT comprises a shell, a one-way valve, a turbulent flow sheet and a turbulent flow spray pipe. Pressurized cooling water is input from the water inlet end through the water conveying pipe, the one-way valve and the flow expanding connector, the spoiler is close to the bottom face of the shell under the action of water flow, the controller is used for controlling the air pump to conduct intermittent circulation to output compressed air, and the compressed air forms high-pressure atomized air to act on the bottom face of the spoiler after passing through the water storage bin of the turbulent flow spraying pipe. The spoiler swings upwards to disturb flow under the action of impact force, and more turbulent flow is formed in the shell to act on the bottom face of the IBGT module due to reciprocating swing of the spoiler. According to the utility model, the input cooling water is pressurized, so that the heat dissipation efficiency can be improved; and the spoilers are used for disturbing the water in the shell in an intermittent circulation manner to form more turbulent flow, so that the heat dissipation efficiency of the IBGT module can be further improved.

Description

Technical Field

[0001] This utility model relates to the field of water-cooled heat dissipation technology for electrical modules, specifically a water-cooled turbulence heat dissipation device for IGBTs. Background Technology

[0002] IGBT modules are composite power electronic devices that combine the advantages of metal-oxide-semiconductor field-effect transistors (MOSFETs) and bipolar transistors (BPTs). They can effectively convert and control electrical energy under high voltage and high current conditions, and have wide and important applications in power electronic systems. They are key components for achieving efficient power conversion and improving the stability and reliability of power electronic systems. Unfortunately, IGBT modules are prone to overheating during operation. Statistics show that for every 5-degree Celsius increase in the average junction temperature of an IGBT, its lifespan decreases by approximately 25%. The overheating of IGBT modules not only affects the lifespan of associated devices but can also directly lead to IGBT module failure, posing significant functional failure and safety risks. Therefore, it is essential to develop a water-cooled turbulence-induced heat dissipation device for IGBTs.

[0003] Currently, the existing Chinese patent publication number CN219457605U discloses a water-cooled radiator for IGBTs. This radiator introduces cooling water into the cavity inside the radiator body through an inlet pipe. The cooling water then flows through a guide plate and onto the turbulence fins. The turbulence fins agitate the flowing cooling water, changing it from turbulent to turbulent flow, thereby increasing the flow velocity of the cooling water on the lower end face of the IGBT module. Therefore, the cooling water can carry away more heat when flowing over the lower end face of the IGBT module. This type of radiator has a higher cooling efficiency than radiators without turbulence fins, but it has a complex structure, is prone to water leakage at the weld seams of the turbulence fins, and has limited improvement in heat dissipation effect.

[0004] Currently, the existing Chinese patent publication number CN222073742U discloses a water-cooled radiator structure. The coolant of this radiator is transported through an inlet pipe. The coolant first flows into multiple heat dissipation plates on the uppermost layer inside the converter cabinet. The coolant flows along the height of the converter cabinet and finally flows into the outlet pipe from multiple heat dissipation plates on the lowermost layer of the converter cabinet, thereby dissipating heat from the electrical components mounted on the heat dissipation plates. Although the flow rate of this radiator can be controlled by a flow meter and a control terminal, the coolant is mostly in a turbulent state, resulting in low heat dissipation efficiency and making it difficult to meet the high heat generation requirements of IGBT modules.

[0005] In summary, while existing liquid cooling heat sinks for IGBT modules can achieve heat dissipation to a certain extent, they still have many shortcomings. Therefore, we have developed a water-cooled turbulence heat dissipation device for IGBTs. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the existing defects and provide a water-cooled turbulence heat dissipation device for IGBTs. The device pressurizes the input cooling water to improve heat dissipation efficiency and uses turbulence plates to intermittently circulate and disturb the water in the housing to form more turbulence, which can further improve the heat dissipation efficiency of the IGBT module and effectively solve the problems in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a water-cooled turbulence heat dissipation device for IGBTs, comprising a housing, a one-way valve, a turbulence plate, and a turbulence nozzle;

[0008] The housing is integrally formed with a housing end cap, which is provided with a threaded hole for the IGBT module to be adapted and connected. Both the inlet and outlet sides of the housing are welded with a flow-expanding connector. A one-way valve is screwed to the outside of the flow-expanding connector. A water supply pipe is screwed to the one-way valve. The housing is provided with a flow-expanding groove adapted to the flow-expanding connector. A flow-turbing plate is screwed to the bottom surface of the housing. A counterweight is glued to the other end of the flow-turbing plate relative to the screwed end.

[0009] The lower part of the housing is screwed with a turbulence nozzle, which has a water storage tank. The lower end of the turbulence nozzle is screwed with an air supply connector, and the lower end of the air supply connector is inserted with an air supply pipe. The air supply pipe is inserted with an air pump at the upper end of the air pump holder, and the controller is screwed onto the air pump holder.

[0010] Preferably, the groove inside the amplification connector is the same size as the amplification groove on the housing.

[0011] Preferably, the fixed end of the baffle plate faces the water inlet end of the housing, and the non-fixed end faces the water outlet end of the housing.

[0012] Preferably, the baffle is made of copper sheet, which is tough, and the counterweight on the baffle is adjustable. After adjusting the counterweight, the baffle forms a 30° angle with the bottom surface of the shell.

[0013] Preferably, when the pressurized cooling water enters the housing through the water supply pipe and flows past the baffle, the angle between the baffle and the bottom surface of the housing will be reduced from 30° to 5°.

[0014] Preferably, when the air pump is in a depressurized state, some of the water inside the housing will flow into the water storage tank inside the turbulence nozzle, and the air supply connector is also equipped with a one-way valve, so that the airflow can only flow from the air supply pipe to the water storage tank.

[0015] Preferably, the controller controls the air pressure and pressurization frequency of the air pump.

[0016] Compared with existing technologies, the advantages of this invention are as follows: Pressurized cooling water enters the housing through a water supply pipe, resulting in a faster flow rate. This allows the cooling water to carry away more heat when it contacts the bottom surface of the IGBT module. Compressed air is fed into the water storage tank of the turbulence nozzle using an air pump, air supply pipe, and air supply connector. This pressurized atomized air acts on the bottom surface of the turbulence vanes, causing them to swing upwards under impact, thus turbulenting the water inside the housing and creating more turbulence. This further improves the heat exchange efficiency between the cooling water and the IGBT module. The controller can control the pressure and frequency of the compressed air output by the air pump. When the air pump is intermittently cyclically outputting compressed air, the turbulence vanes continuously move towards and away from the bottom surface of the housing, achieving continuous turbulence with a controllable frequency. In summary, this heat dissipation device is easy to operate, has high heat dissipation efficiency, and allows for adjustment of the heat dissipation efficiency according to actual operating conditions. Attached Figure Description

[0017] Figure 1 This is an isometric view of the present invention;

[0018] Figure 2 This is the front view of the present invention;

[0019] Figure 3 This is a top view of the present invention;

[0020] Figure 4 This is a partial full sectional view of the present invention;

[0021] Figure 5 This is an isometric view of the heat dissipation device and IGBT module of this utility model;

[0022] Figure 6 This is a front view of the baffle and counterweight of this utility model.

[0023] In the diagram: 1 is the end cap of the housing, 2 is the housing, 3 is the flow diffuser, 4 is the one-way valve, 5 is the water supply pipe, 6 is the flow diffuser groove, 7 is the baffle plate, 8 is the counterweight, 9 is the baffle nozzle, 10 is the water storage tank, 11 is the air supply connector, 12 is the air supply pipe, 13 is the air pump holder, 14 is the air pump, 15 is the controller, and 16 is the IGBT module. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-6 This utility model provides a technical solution: a water-cooled turbulence heat dissipation device for IGBTs, including a housing 2, a one-way valve 4, a turbulence plate 7, and a turbulence nozzle 9;

[0026] The housing 2 is integrally formed with a housing end cap 1. The housing end cap 1 is provided with a threaded hole for matching and connecting with the IGBT module 16. The IGBT module 16 is connected to the housing end cap 1 by bolts. The bottom surface of the IGBT module 16 is in contact with the cooling water inside the housing 2. Both the inlet and outlet sides of the housing 2 are welded with a flow-expanding connector 3. A one-way valve 4 is screwed to the outside of the flow-expanding connector 3. The one-way valve 4 controls the direction of water flow. A water supply pipe 5 is screwed to the one-way valve 4. The housing 2 is provided with a flow-expanding groove 6 that matches the flow-expanding connector 3. A baffle 7 is screwed to the bottom surface of the housing 2. The baffle 7 plays a role in turbulence of the cooling water, forming turbulence to cool the bottom surface of the IGBT module 16 and remove heat. A counterweight 8 is glued to the other end of the baffle 7 relative to the screwed end.

[0027] It should be noted that the baffle plate 7 is made of copper sheet, which is tough. The counterweight 8 on the baffle plate 7 is adjustable. The counterweight 8 is bonded to the baffle plate 7. After adjusting the counterweight 8, the baffle plate 7 forms a 30° angle with the bottom surface of the shell 2. When the pressurized cooling water enters the shell 2 through the water pipe 5 and flows through the baffle plate 7, it will reduce the angle between the baffle plate 7 and the bottom surface of the shell 2 from 30° to 5°.

[0028] A turbulence nozzle 9 is screwed to the lower part of the housing 2. The turbulence nozzle 9 has a water storage tank 10. An air supply connector 11 is screwed to the lower end of the turbulence nozzle 9. An air supply pipe 12 is inserted into the lower end of the air supply connector 11. The air supply pipe 12 is inserted into the air pump 14 at the upper end of the air pump bearing 13. A controller 15 is screwed onto the air pump bearing 13. The controller 15 controls the air pressure and pressurization frequency of the air pump 14. The control method is existing technology and will not be described in detail here.

[0029] It should be noted that the air pump 14 can be controlled by the controller 15 to intermittently circulate compressed air. After the compressed air passes through the water storage tank 10 of the turbulence nozzle 9, it forms high-pressure atomized air that acts on the bottom surface of the turbulence plate 7, causing the turbulence plate 7 to swing upward under the impact force. After the compressed air stops flowing in, the pressurized cooling water impacts the turbulence plate 7 and bends it. Since the compressed air output by the air pump 14 is intermittently circulated, the turbulence plate 7 will continuously move close to the bottom surface of the housing 2 and away from the bottom surface of the housing 2. The turbulence plate 7 intermittently circulates and disturbs the water in the housing 2, so that more turbulence is formed inside the housing 2 and acts on the bottom surface of the IBGT module 16, thereby accelerating the heat exchange efficiency between the cooling water and the IBGT module 16.

[0030] Furthermore, the groove inside the expansion joint 3 is the same size as the expansion groove 6 on the housing 2, and the groove and expansion groove 6 are the same size, which reduces the resistance of cooling water.

[0031] Furthermore, the fixed end of the baffle 7 faces the water inlet of the housing 2, and the non-fixed end faces the water outlet of the housing 2. The cooling water enters from the water inlet and acts directly on the baffle 7.

[0032] Furthermore, when the air pump 14 is in a depressurized state, some of the water in the housing 2 will flow into the water storage tank 10 in the turbulence nozzle 9. After the compressed air enters, it acts on the water in the water storage tank 10 and forms high-pressure atomized air that impacts the turbulence vane 7. The air supply connector 11 is also equipped with a one-way valve, so the airflow can only flow from the air supply pipe 12 to the water storage tank 10, thus preventing the water in the water storage tank 10 from entering the air supply pipe 12 and forming air supply resistance and damaging the air pump 14.

[0033] Working principle: During use, pressurized cooling water is input from the inlet end through the water supply pipe 5, one-way valve 4, and diffuser 3. Under the action of the counterweight 8, the baffle 7 forms a 30° angle with the bottom surface of the shell 2. Under the action of the water flow, the baffle 7 is closer to the bottom surface of the shell 2. At this time, the controller 15 controls the air pump 14 to intermittently circulate compressed air. After the compressed air passes through the water storage tank 10 of the baffle nozzle 9, it forms high-pressure atomized air that acts on the bottom surface of the baffle 7, causing the baffle 7 to swing upward under the impact force. Since the compressed air output by the air pump 14 is intermittently circulated, the baffle 7 will continuously move closer to the bottom surface of the shell 2 and away from the bottom surface of the shell 2 inside the shell 2, continuously turbulentizing the cooling water inside the shell 2, so that more turbulence is formed inside the shell 2 and acts on the bottom surface of the IBGT module 16, thereby accelerating the heat exchange efficiency between the cooling water and the IBGT module 16.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water-cooled turbulence heat sink for an IGBT, characterized by: The shell (2), the one-way valve (4), the spoiler (7) and the spoiler nozzle (9) are included. The shell end cover (1) is integrally formed on the shell (2), the threaded hole adapted to connect with the IGBT module (16) is arranged on the shell end cover (1), the water inlet and outlet sides of the shell (2) are welded with the flow expansion joint (3), the one-way valve (4) is screwed on the outer side of the flow expansion joint (3), the water pipe (5) is screwed on the one-way valve (4), the flow expansion groove (6) adapted to the flow expansion joint (3) is arranged on the shell (2), the spoiler (7) is screwed on the bottom surface of the shell (2), the counterweight (8) is bonded to the other end of the spoiler (7) relative to the screwing end. The spoiler nozzle (9) is screwed on the lower part of the shell (2), the spoiler nozzle (9) has the water storage warehouse (10), the gas inlet joint (11) is screwed on the lower end of the spoiler nozzle (9), the gas inlet pipe (12) is inserted into the gas pump (14) of the gas pump support (13) at the upper end, and the controller (15) is screwed on the gas pump support (13).

2. The water-cooled turbulence heat sink for an IGBT according to claim 1, characterized in that: The groove in the flow expansion joint (3) is consistent in size with the flow expansion groove (6) on the shell (2).

3. The water-cooled turbulence heat sink for an IGBT according to claim 1, characterized in that: The fixed end of the spoiler (7) faces the water inlet end of the shell (2), and the non-fixed end faces the water outlet end of the shell (2).

4. The water-cooled turbulence heat sink for an IGBT according to claim 1, characterized in that: The spoiler (7) is made of copper sheet material and has toughness, the counterweight (8) on the spoiler (7) can be adjusted, and the spoiler (7) and the bottom surface of the shell (2) form a 30° angle after adjusting the counterweight (8).

5. The water-cooled turbulence heat sink for an IGBT according to claim 1, characterized in that: After the pressurized cooling water enters the shell (2) through the water pipe (5) and flows through the spoiler (7), the angle between the spoiler (7) and the bottom surface of the shell (2) is reduced from 30° to 5°.

6. The water-cooled turbulence heat sink for an IGBT according to claim 1, wherein: In the pressure relief state of the gas pump (14), part of the water in the shell (2) flows into the water storage warehouse (10) in the spoiler nozzle (9), the gas inlet joint (11) is also provided with a one-way valve, and the airflow can only flow from the gas inlet pipe (12) to the water storage warehouse (10).

7. The water-cooled turbulence heat sink for an IGBT according to claim 1, wherein: The controller (15) controls the air pressure and pressurization frequency of the gas pump (14).

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