IGBT module water-cooling air-drying structure

Abstract

The utility model discloses an IGBT (Insulated Gate Bipolar Translator) module water-cooling air-drying structure, which comprises a gas-liquid base, a gas path guide plate and a cooling tank body, a sealed cavity is formed by the gas-liquid base and the cooling tank body, and the gas path guide plate is arranged in the cavity; a water path one-way valve is installed on one side of the cooling tank body, a flow guide connector is installed on the other side of the cooling tank body, a gas path one-way valve is installed on one side of the gas-liquid base, and gas passing through the gas path one-way valve acts into the cooling tank body through a gas path flow guide plate. By arranging the gas-liquid base, the gas path guide plate and the cooling groove body, the IGBT module is specifically cooled through gas-liquid on-off branch control and gas flow guide layout, heat of the IGBT module can be effectively and rapidly taken away through a water cooling structure, cooling water beads on IGBT cooling fins can be taken away through air flow, and the heat dissipation efficiency of the IGBT module is improved. The IGBT module reactive aging test device has a certain drying capability while realizing heat radiation, realizes variable controllability for the IGBT module in reactive aging test, and lays a foundation for test result accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of IGBT module air drying, in particular to a water-cooled air drying structure for an IGBT module. Background Art

[0002] The reactive power aging test of IGBT modules refers to running the modules for a long time in a specified working environment to test their performance stability and reliability in long-term use. Its purpose is to understand the long-term performance stability of the modules, explore the working life and failure rate of the modules, and test the safety and stability of the modules.

[0003] Because a lot of heat will be generated during the module test, and corresponding variable control is required for parameters such as experimental time, voltage, current, and temperature, the heat dissipation demand for the IGBT module is essential during the test. Generally speaking, under the same space conditions, air cooling is not as effective as liquid cooling, but liquid cooling has the defect of liquid residue. Therefore, based on the above shortcomings, this application proposes a water-cooled and air-dried structure for IGBT modules. Utility Model Content

[0004] The technical problem to be solved by the utility model is: how to solve the heat dissipation problem of the IGBT module in the reactive aging experiment.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] An IGBT module water-cooling and air-drying structure comprises a gas-liquid base, a gas path guide plate and a cooling tank body, wherein the gas-liquid base and the cooling tank body form a sealed cavity, and the gas path guide plate is installed in the cavity;

[0007] A water circuit one-way valve is installed on one side of the cooling tank body, and a guide joint is installed on the other side. A gas circuit one-way valve is installed on one side of the gas-liquid base. The gas passing through the gas circuit one-way valve acts on the cooling tank body through the gas circuit guide plate.

[0008] The present application sets a gas-liquid base, a gas path guide plate and a cooling trough, and controls the gas-liquid on-off branch and the gas diversion layout to carry out targeted cooling. It can not only effectively remove the heat of the IGBT module through the water cooling structure, but also remove the cooling water droplets on the IGBT cooling fins through the air volume and airflow. While achieving heat dissipation, it also has a certain drying ability, which realizes the controllability of variables for the IGBT module during reactive aging testing and lays the foundation for the accuracy of the test results.

[0009] As a further solution of the utility model: the interior of the cooling trough body is hollow, and slots are provided at the top and the bottom, the air path guide plate can be inserted into the internal hollow slot, and the water path one-way valve and guide joint connected on both sides of the cooling trough body are connected to the internal hollow slot of the cooling trough body.

[0010] As a further solution of the utility model: one end of the water channel one-way valve is provided with a water channel input end, and the other end is provided with a water channel output end, and the water channel output end is communicated with the cooling tank body.

[0011] As a further solution of the utility model: one end of the flow guide joint is provided with a flow discharge input end, and the other end is provided with a flow discharge output end, and the flow discharge input end is communicated with the cooling tank body.

[0012] As a further solution of the utility model: an air path inlet surface is arranged at the bottom of the air path guide plate, an air path outlet surface is arranged at the top, and a plurality of groups of air path outlet holes are opened between the air path inlet surface and the air path outlet surface.

[0013] As a further solution of the utility model: slopes are provided on both sides of the air path guide plate, and air path outlet holes are also opened on the slopes.

[0014] As a further solution of the utility model: an airflow input end connected to an air path one-way valve is provided on one side of the gas-liquid base, and an airflow output end is provided inside the gas-liquid base.

[0015] As a further solution of the utility model: one end of the gas circuit one-way valve is provided with a gas circuit input end, and the other end is provided with a gas circuit output end, and the gas circuit output end is communicated with the gas-liquid base.

[0016] As a further solution of the utility model: a dovetail groove sealing ring is installed in the top trough body of the cooling trough body.

[0017] As a further solution of the utility model: a sealing ring is installed on the top of the gas-liquid base and at the connection position with the cooling tank body.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] First, the present application provides a gas-liquid base, a gas path guide plate and a cooling tank body, and controls the gas-liquid on-off branch and the gas guide layout to cool the module in a targeted manner. The heat of the IGBT module can be quickly removed through the water cooling structure, and the cooling water droplets on the IGBT heat sink fins can be removed through the air volume and airflow. While achieving heat dissipation, it also has a certain drying ability, which realizes the controllability of variables for the IGBT module during the reactive aging test, solves the controllability of the variable parameters of the module in the reactive aging test, and gives the test results accuracy and reliability.

[0020] Secondly, the IGBT module of the present application is fixed together with the cooling trough body by bolts, wherein the cooling trough body is equipped with a dovetail groove sealing ring to ensure the sealing of the contact position between the module and the cooling trough body, and the IGBT module and the cooling trough body are quality inspected by realizing gas-liquid sealing through the dovetail groove sealing ring; the gas path guide plate is embedded between the cooling trough body and the gas-liquid base, and the gas-liquid base and the cooling trough body are fastened by bolts, and the gas-liquid base and the internal space of the cooling trough body are sealed by the sealing ring, thereby ensuring the sealing of the contact position between the gas-liquid base and the cooling trough body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an exploded view of a water-cooled and air-dried structure of an IGBT module according to an embodiment of the utility model;

[0022] Figure 2 This is a cross-sectional view of a water-cooled and air-dried structure of an IGBT module according to an embodiment of the utility model;

[0023] Figure 3 This is a top view of a water-cooled and air-dried structure of an IGBT module according to an embodiment of the utility model;

[0024] Figure 4 This is a left view of a water-cooled and air-dried structure of an IGBT module according to an embodiment of the utility model;

[0025] Figure 5 This is a bottom view of a water-cooled and air-dried structure of an IGBT module according to an embodiment of the utility model;

[0026] Explanation of the reference numerals: 1. IGBT module; 11. DBC substrate; 12. Heat dissipation substrate; 2. Cooling trough body; 3. Water channel one-way valve; 31. Water channel input end; 32. Water channel output end; 4. Gas channel guide plate; 41. Gas channel inlet surface; 42. Gas channel output surface; 43. Gas channel outlet hole; 5. Gas-liquid base; 51. Air flow input end; 52. Air flow output end; 6. Guide joint; 61. Drainage input end; 62. Drainage output end; 7. Gas channel one-way valve; 71. Gas channel input end; 72. Gas channel output end; 8. Dovetail groove sealing ring; 9. Sealing ring. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A water-cooled air-drying structure for an IGBT module includes a cooling trough body 2, a water-path one-way valve 3, an air-path guide plate 4, an air-liquid base 5, a guide joint 6, an air-path one-way valve 7, a dovetail groove sealing ring 8 and a sealing ring 9, wherein the air-liquid base 5 is located at the bottom, the cooling trough body 2 is detachably mounted on the top of the air-liquid base 5 by bolts or pins, and the air-path guide plate 4 is mounted between the air-liquid base 5 and the cooling trough body 2, and the IGBT module 1 is detachably mounted on the top of the cooling trough body 2; the water-path one-way valve 3 is mounted on one side of the cooling trough body 2 and communicates with the interior of the cooling trough body 2; the guide joint 6 is mounted on the other side of the cooling trough body 2 and communicates with the interior of the cooling trough body 2; and the air-path one-way valve 7 is mounted on one side of the air-liquid base 5.

[0029] Reference Figure 1 The IGBT module 1 includes a DBC substrate 11 and a heat dissipation substrate 12 disposed below the DBC substrate 11 , wherein the heat dissipation substrate 12 includes a plurality of heat dissipation fins.

[0030] Reference Figure 1 and Figure 2 The cooling tank body 2 is a rectangular plate-shaped structure, wherein the interior of the cooling tank body 2 is hollow, and notches are provided at the top and the bottom. The air path guide plate 4 can be placed in the internal hollow groove, and the heat dissipation substrate 12 below the DBC substrate 11 can also be placed in the internal hollow groove. The water path one-way valve 3 and the guide joint 6 connected on both sides of the cooling tank 2 are both connected to the internal hollow groove of the cooling tank 2. The cooling water entering through the water path one-way valve 3 can act on the heat dissipation substrate 12, thereby realizing water cooling of the IGBT module 1;

[0031] Furthermore, installation slots are provided on both sides of the cooling trough body 2 , and the two installation slots are connected to the inner hollow slot of the cooling trough body 2 , and the two installation slots are used to install the guide joint 6 and the water channel one-way valve 3 respectively.

[0032] Reference Figure 1 and Figure 2 One end of the water channel one-way valve 3 is provided with a water channel input end 31, and the other end is provided with a water channel output end 32. The water channel output end 32 is connected to the cooling tank 2. The water channel one-way valve 3 can be directly connected to the water pipe. The cooling water can pass through the water channel one-way valve 3 and enter the cooling tank body 2, and then dissipate the heat of the IGBT module 1. After the heat dissipation is completed, the cooling water can be discharged from the guide joint 6.

[0033] Reference Figure 1 and Figure 2An air path inlet surface 41 is provided at the bottom of the air path guide plate 4, and an air path outlet surface 42 is provided at the top. A plurality of groups of air path outlet holes 43 are provided between the air path inlet surface 41 and the air path outlet surface 42. Slopes are provided on both sides of the air path guide plate 4, and air path outlet holes 43 are also provided on the slopes. The bottom of the air path guide plate 4 is installed on the air-liquid base 5, and the top is placed in the cooling tank body 2.

[0034] Reference Figure 1 and Figure 2 An airflow input terminal 51 connected to the air path one-way valve 7 is provided on one side of the gas-liquid base 5, and an airflow output terminal 52 is provided inside the gas-liquid base 5, wherein the airflow output terminal 52 is provided on the top of the gas-liquid base 5, and an airflow output groove is provided in the middle position of the airflow output terminal 52, and an airflow input terminal 51 is also provided on one side of the gas-liquid base 5, wherein the airflow input terminal 51 is connected to the airflow output terminal 52, and the airflow input terminal 51 is installed with the air path one-way valve 7.

[0035] Reference Figure 1 and Figure 2 A drainage input terminal 61 is provided at one end of the flow guide joint 6, and a drainage output terminal 62 is provided at the other end. The drainage input terminal 61 is connected to the cooling tank body 2, and the test heat of the IGBT module 1 is taken away by continuously supplying water. When the water cooling is completed, the cooling water in the cooling tank body 2 can be discharged through the flow guide joint 6.

[0036] Reference Figure 1 and Figure 2 One end of the gas path one-way valve 7 is provided with a gas path input end 71, and the other end is provided with a gas path output end 72. The gas path output end 72 is communicated with the gas-liquid base 5. The gas path one-way valve 7 is connected to the gas injection pipeline, and the gas is introduced into the gas flow input end 51 through the gas path one-way valve 7, and then enters the gas flow output end 52 through the gas flow input end 51, and outputs the gas at the concentric small hole on the gas path output surface 42 through the concentric small hole on the gas path introduction surface 41 of the gas path guide plate 4 that is concentric with the heat dissipation substrate 12, so as to achieve the purpose of evenly distributing the gas and blowing water on the multi-cylindrical heat dissipation fins in the heat dissipation substrate 12 of the 1IGBT module.

[0037] It should be noted that in the water-cooling and air-drying structure of the IGBT module, since the water circuit one-way valve 3 and the gas circuit one-way valve 7 both have one-way flow functions, the entire liquid cooling water is input at the water circuit one-way valve 3 and output at the flow guide joint 6, and the other flow direction of the gas circuit one-way valve 7 is closed, thereby completing the entire water cooling process. When the water circuit one-way valve 3 stops supplying water-cooling liquid, the gas circuit one-way valve 7 starts to perform gas circuit air-drying work. Similarly, because the water circuit one-way valve 3 has a one-way conduction function, the positive water blowing process is completed.

[0038] The specific operating principles of this application are as follows:

[0039] The drying process in the water-cooled air-drying structure of the IGBT module in the reactive aging test is because the IGBT module 1 is assembled into the upper layer. After water cooling, under the action of gravity, water droplets on the heat dissipation substrate 12 accumulate on the cylindrical end surface of the heat dissipation fins. The air flow is evenly distributed through the air path guide plate 4 of the combined inner cavity, and the air flow is evenly distributed through the air path output surface 42 and the cylindrical concentric small holes of the heat dissipation fins of the heat dissipation substrate 12 to blow water on the cylindrical end surface and column of the heat dissipation fins of the corresponding heat dissipation substrate 12, thereby achieving the effect of targeted air cooling to dry the heat dissipation substrate 12 of the entire IGBT module 1.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An IGBT module water-cooling and air-drying structure, characterized in that: It comprises a gas-liquid base (5), a gas path guide plate (4) and a cooling tank body (2), wherein the gas-liquid base (5) and the cooling tank body (2) form a sealed cavity, and the gas path guide plate (4) is installed in the cavity; A water circuit one-way valve (3) is installed on one side of the cooling trough body (2), and a flow guide joint (6) is installed on the other side; an air circuit one-way valve (7) is installed on one side of the gas-liquid base (5); and the gas passing through the air circuit one-way valve (7) acts on the cooling trough body (2) through the air circuit guide plate (4).

2. The IGBT module water-cooling and air-drying structure according to claim 1, characterized in that: The interior of the cooling trough body (2) is hollow, and slots are provided at the top and the bottom. The air path guide plate (4) can be inserted into the internal hollow slot. The water path one-way valve (3) and the guide joint (6) connected to both sides of the cooling trough body (2) are both in communication with the internal hollow slot of the cooling trough body (2).

3. The IGBT module water-cooling and air-drying structure according to claim 1, characterized in that: One end of the water channel one-way valve (3) is provided with a water channel input end (31), and the other end is provided with a water channel output end (32), and the water channel output end (32) is communicated with the cooling tank body (2).

4. The IGBT module water-cooling and air-drying structure according to claim 1, characterized in that: One end of the flow guide joint (6) is provided with a flow discharge input end (61), and the other end is provided with a flow discharge output end (62), and the flow discharge input end (61) is in communication with the cooling tank body (2).

5. The IGBT module water-cooling and air-drying structure according to claim 1, characterized in that: The bottom of the gas path guide plate (4) is provided with a gas path inlet surface (41), and the top is provided with a gas path outlet surface (42), and a plurality of groups of gas path outlet holes (43) are provided between the gas path inlet surface (41) and the gas path outlet surface (42).

6. The IGBT module water-cooling and air-drying structure according to claim 5, characterized in that: Slopes are provided on both sides of the air path guide plate (4), and air path outlet holes (43) are also provided on the slopes.

7. The IGBT module water-cooling and air-drying structure according to claim 1, characterized in that: An airflow input end (51) connected to an air path one-way valve (7) is provided on one side of the air-liquid base (5), and an airflow output end (52) is provided inside the air-liquid base (5).

8. The IGBT module water-cooling and air-drying structure according to claim 1, characterized in that: The gas path one-way valve (7) is provided with a gas path input end (71) at one end and a gas path output end (72) at the other end, and the gas path output end (72) is communicated with the gas-liquid base (5).

9. The IGBT module water-cooling and air-drying structure according to claim 1, characterized in that: A dovetail groove sealing ring (8) is installed in the top tank body of the cooling tank body (2).

10. The IGBT module water-cooling and air-drying structure according to claim 1, characterized in that: A sealing ring (9) is installed on the top of the gas-liquid base (5) and at the connection position with the cooling tank body (2).

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