IGBT test water cooling mechanism and cooling method

Abstract

The invention discloses an IGBT test water cooling mechanism and a cooling method, the IGBT test water cooling mechanism comprises a rotary feeding table, the rotary feeding table is provided with a jig, the jig comprises a hollow opening, the jig is used for loading an IGBT device to be tested, the IGBT device covers the hollow opening, the rotary feeding table is provided with a clearance opening, and the clearance opening covers the hollow opening. A water supply platform and a water supply driving mechanism used for driving the water supply platform to ascend and descend are arranged below the rotary feeding table, the water supply platform is aligned with the clearance opening, and when the water supply driving mechanism drives the water supply platform to ascend, the clearance opening is communicated with the clearance opening. A water cooling cavity is defined by the bottom face of the IGBT device, the hollowed-out opening, the clearance opening and the top face of the water supply platform, and a water supply opening used for spraying water to the water cooling cavity is formed in the top face of the water supply platform. According to the invention, the cooling water can be fully contacted with the IGBT device, and the cooling water can be rapidly discharged and completely discharged after the test is completed.

Description

Technical Field

[0001] The invention relates to IGBT testing equipment, and in particular to an IGBT testing water cooling mechanism and a cooling method. Background Art

[0002] As a power device, the IGBT device generates a lot of heat during its operation. In the existing IGBT device function test process, while using the test module to power on the IGBT device for testing, it is also necessary to add cooling measures for the IGBT device to make the test environment of the IGBT device consistent with the actual application environment. The specific cooling method includes a water cooling process. For example, a cooling chamber is set in the fixing fixture of the IGBT device, and the cooling chamber is connected to the water supply mechanism through a circulating water circuit. The cooling water flowing through the cooling chamber is used to contact the IGBT device to achieve a cooling effect. However, because the cooling chamber is located below the IGBT device, the air temporarily retained in the cooling chamber will cause the IGBT device to be unable to fully contact the cooling water, thereby resulting in low cooling efficiency. In addition, when the test is completed, the circulating water circuit will stop supplying water. In this process, it is necessary to wait for all the water in the cooling chamber to flow out. Not only is the waiting time long, but it is also impossible to ensure that the water in the cooling chamber is completely drained, resulting in a lot of residual water at the bottom of the IGBT device, which directly affects the subsequent process flow. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an IGBT test water cooling mechanism which can make cooling water fully contact with IGBT devices and can quickly discharge and drain the cooling water after the test is completed, in view of the shortcomings of the prior art.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions.

[0005] A water cooling mechanism for IGBT testing comprises a rotating loading platform, a jig is arranged on the rotating loading platform, the jig comprises a hollow opening, the jig is used to load an IGBT device to be tested, and the IGBT device covers the hollow opening, an air avoidance opening is provided on the rotating loading platform, the air avoidance opening is aligned with the hollow opening and is interconnected, a water supply platform and a water supply driving mechanism for driving the water supply platform to move up and down are provided below the rotating loading platform, the water supply platform is aligned with the air avoidance opening, when the water supply driving mechanism drives the water supply platform to rise, a water cooling cavity is formed by the bottom surface of the IGBT device, the hollow opening, the air avoidance opening and the top surface of the water supply platform, and a water supply opening for spraying water into the water cooling cavity is provided on the top surface of the water supply platform.

[0006] Preferably, a conical surface portion is formed on the edge of the water supply platform, and when the water supply driving mechanism drives the water supply platform to rise, the conical surface portion is aligned with the lower end opening of the air avoidance port.

[0007] Preferably, the hollow opening and the air-avoiding opening are both rectangular openings, and the water supply platform is a rectangular platform.

[0008] Preferably, the edge of the IGBT device is sealed with the edge of the hollow opening.

[0009] Preferably, the water supply port is a long strip-shaped water supply port extending along the length direction of the water supply platform.

[0010] Preferably, a loading platform support is provided below the rotating loading platform, a rotating driving mechanism for driving the rotating loading platform to rotate is provided on the loading platform support, and the water supply driving mechanism is installed on the side of the loading platform support.

[0011] Preferably, the water supply drive mechanism includes a water supply bracket and a water supply drive cylinder, the water supply bracket is fixed to the side of the loading platform support, the water supply drive cylinder is fixed on the water supply bracket, the moving end of the top of the water supply drive cylinder is provided with a water guide block, and the water supply platform is fixed to the upper end of the water guide block.

[0012] Preferably, a water guide channel connected to the water supply port is provided in the water guide block, and a water guide interface connected to the water guide channel is provided on the side of the water guide block.

[0013] Preferably, a cooling box is included, the rotating loading platform is arranged on the top of the cooling box, and the water supply platform and the water supply driving mechanism are both arranged in the cooling box.

[0014] A cooling method for IGBT testing is implemented based on the water cooling mechanism described above, and the cooling method comprises: loading the IGBT device to be tested on the fixture, the rotating loading platform drives the fixture to move to the top of the water supply platform, and using the water supply drive mechanism to drive the water supply platform to rise and cover the air avoidance from the bottom, so that the bottom surface of the IGBT device, the hollow opening, the air avoidance and the top surface of the water supply platform are surrounded to form a water cooling cavity, and then water is sprayed into the water cooling cavity through the water supply port, and cooling is achieved by the water sprayed from the water supply port contacting with the heat sink densely distributed at the bottom of the IGBT device. After the test of the IGBT device is completed, the water supply drive mechanism drives the water supply platform to descend to discharge the water in the water cooling cavity.

[0015] In the IGBT test water cooling mechanism disclosed in the present invention, the rotating loading platform conveys the fixture loaded with the IGBT device to be tested to the top of the water supply platform by means of a rotating motion, so that the water supply platform is aligned with the air avoidance port, and then the water supply driving mechanism drives the water supply platform to rise, so that the water supply platform contacts the edge of the air avoidance port, at which time the bottom surface of the IGBT device, the hollow opening, the air avoidance port and the top surface of the water supply platform are surrounded to form a water cooling cavity, and water is sprayed into the water cooling cavity from the water supply port on the top surface of the water supply platform, because the water sprayed upward from the water supply port is directly sprayed onto the bottom surface of the IGBT device, so that the cooling water is fully in contact with the bottom surface of the IGBT device, thereby greatly improving the cooling efficiency of the IGBT device, and when the test is completed, the water supply driving mechanism drives the water supply platform to descend, and the water supply platform is separated from the air avoidance port, at which time the water in the water cooling cavity can be quickly discharged and drained, which can effectively improve the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The structure of the water cooling mechanism Figure 1 ; Figure 2 The structure of the water cooling mechanism Figure 2 ; Figure 3 This is a structural diagram of the water supply platform and water supply drive mechanism. DETAILED DESCRIPTION

[0017] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments.

[0018] The invention discloses an IGBT test water cooling mechanism, combined with Figures 1 to 3 As shown, it includes a rotating loading platform 1, on which a fixture 4 is provided, and the fixture 4 includes a hollow opening 400, the fixture 4 is used to load the IGBT device 100 to be tested, and the IGBT device 100 covers the hollow opening 400, and an air avoidance opening 102 is opened on the rotating loading platform 1, and the air avoidance opening 102 is aligned with the hollow opening 400 and is connected to each other, and a water supply platform 50 and a water supply driving mechanism 51 for driving the water supply platform 50 to move up and down are provided below the rotating loading platform 1, and the water supply platform 50 is aligned with the air avoidance opening 102. When the water supply driving mechanism 51 drives the water supply platform 50 to rise, a water cooling cavity is formed by the bottom surface of the IGBT device 100, the hollow opening 400, the air avoidance opening 102 and the top surface of the water supply platform 50, and a water supply opening 53 for spraying water into the water cooling cavity is opened on the top surface of the water supply platform 50.

[0019] In the above structure, the rotating loading platform 1 transports the fixture 4 loaded with the IGBT device 100 to be tested to the top of the water supply platform 50 by means of a rotating motion, so that the water supply platform 50 is aligned with the air avoidance opening 102, and then the water supply driving mechanism 51 drives the water supply platform 50 to rise, so that the water supply platform 50 contacts the edge of the air avoidance opening 102, at which time the bottom surface of the IGBT device 100, the hollow opening 400, the air avoidance opening 102 and the top surface of the water supply platform 50 are surrounded to form a water cooling cavity, which is formed by the water supply driving mechanism 51. The water supply port 53 on the top surface of the water platform 50 sprays water into the water cooling cavity. Since the water sprayed upward from the water supply port 53 is directly sprayed toward the bottom surface of the IGBT device 100, the cooling water is fully in contact with the bottom surface of the IGBT device 100, which greatly improves the cooling efficiency of the IGBT device 100. When the test is completed, the water supply drive mechanism 51 drives the water supply platform 50 to descend, and the water supply platform 50 is separated from the air avoidance port 102. At this time, the water in the water cooling cavity can be quickly discharged and drained, which can effectively improve work efficiency.

[0020] In order to make the water supply platform 50 contact the edge of the air-avoiding opening 102 well, in this embodiment, a conical surface portion 52 is formed on the edge of the water supply platform 50. When the water supply driving mechanism 51 drives the water supply platform 50 to rise, the conical surface portion 52 is aligned with the lower end opening of the air-avoiding opening 102. In the above structure, by providing the conical surface portion 52 on the edge of the water supply platform 50, it can ensure good contact between the two and avoid the occurrence of jamming between the water supply platform 50 and the edge of the air-avoiding opening 102.

[0021] As a preferred embodiment, the hollow opening 400 and the air-avoiding opening 102 are both rectangular openings, and the water supply platform 50 is a rectangular platform.

[0022] In order to prevent water leakage from the top edge of the fixture, in the present embodiment, the edge of the IGBT device 100 is sealed with the edge of the hollow opening 400 .

[0023] In practical applications, since the IGBT device 100 is rectangular in shape as a whole, in order to allow its bottom surface to fully contact cooling water, in this embodiment, the water supply port 53 is a long strip-shaped water supply port extending along the length direction of the water supply platform 50 .

[0024] This embodiment also includes a cooling box, the rotating loading platform 1 is arranged on the top of the cooling box, and the water supply platform 50 and the water supply driving mechanism 51 are both arranged in the cooling box. The cooling box can be used to receive the cooling water falling in the water cooling chamber, and the cooling water in the cooling box can be supplied to the water supply port 53 again by the water circulation mechanism after circulating and filtering.

[0025] In order to drive the rotating loading platform 1 to move, in this embodiment, a loading platform support 103 is provided below the rotating loading platform 1, and a rotating driving mechanism 10 for driving the rotating loading platform 1 to rotate is provided on the loading platform support 103, and the water supply driving mechanism 51 is installed on the side of the loading platform support 103.

[0026] Regarding the specific structure of the water supply drive mechanism 51, in this embodiment, the water supply drive mechanism 51 includes a water supply bracket 510 and a water supply drive cylinder 511, the water supply bracket 510 is fixed to the side of the loading platform support 103, the water supply drive cylinder 511 is fixed to the water supply bracket 510, the moving end of the top of the water supply drive cylinder 511 is provided with a water guide block 512, and the water supply platform 50 is fixed to the upper end of the water guide block 512. Further, a water guide channel connected to the water supply port 53 is provided in the water guide block 512, and a water guide interface 513 connected to the water guide channel is provided on the side of the water guide block 512. In the above structure, the preset water circulation mechanism can be connected to the water guide interface 513 through a water pipe.

[0027] On this basis, this embodiment further proposes an IGBT test cooling method, which is implemented based on the water cooling mechanism described above, and includes: The IGBT device 100 to be tested is loaded on the fixture 4, and the rotating loading platform 1 drives the fixture 4 to move to the top of the water supply platform 50. The water supply driving mechanism 51 drives the water supply platform 50 to rise and cover the air avoidance port 102 from the bottom, so that the bottom surface of the IGBT device 100, the hollow port 400, the air avoidance port 102 and the top surface of the water supply platform 50 are surrounded to form a water cooling cavity. Then, water is sprayed into the water cooling cavity through the water supply port 53. The water sprayed from the water supply port 53 contacts the heat sink 104 densely distributed at the bottom of the IGBT device 100 to achieve cooling. After the test of the IGBT device 100 is completed, the water supply driving mechanism 51 drives the water supply platform 50 to descend to discharge the water in the water cooling cavity.

[0028] In actual applications, in order to achieve continuous water spraying from the water supply port 53 and avoid pressure increase in the water cooling chamber, a gap can be reserved between the edge of the water supply platform 50 and the edge of the air avoidance port 102, or a pressure relief groove can be set on the edge of the water supply platform 50 to release the pressure in the water cooling chamber.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the technical scope of the present invention should be included in the scope of protection of the present invention.

Claims

1. An IGBT test water cooling mechanism, characterized in that: The invention comprises a rotating loading platform, on which a jig is arranged, wherein the jig comprises a hollow opening, and the jig is used for loading an IGBT device to be tested, and the IGBT device covers the hollow opening, and an air avoidance opening is provided on the rotating loading platform, and the air avoidance opening is aligned with and interconnected with the hollow opening, and a water supply platform and a water supply driving mechanism for driving the water supply platform to move up and down are provided below the rotating loading platform, and the water supply platform is aligned with the air avoidance opening, and when the water supply driving mechanism drives the water supply platform to rise, a water cooling cavity is formed by the bottom surface of the IGBT device, the hollow opening, the air avoidance opening and the top surface of the water supply platform, and a water supply opening for spraying water into the water cooling cavity is provided on the top surface of the water supply platform.

2. The IGBT test water cooling mechanism according to claim 1, characterized in that: A conical surface is formed on the edge of the water supply platform. When the water supply driving mechanism drives the water supply platform to rise, the conical surface is aligned with the lower end opening of the air avoidance port.

3. The IGBT test water cooling mechanism according to claim 1, characterized in that: The hollow opening and the air-avoiding opening are both rectangular openings, and the water supply platform is a rectangular platform.

4. The IGBT test water cooling mechanism according to claim 1, characterized in that: The edge of the IGBT device is sealed and matched with the edge of the hollow opening.

5. The IGBT test water cooling mechanism according to claim 3, characterized in that: The water supply port is a long strip-shaped water supply port extending along the length direction of the water supply platform.

6. The IGBT test water cooling mechanism according to claim 1, characterized in that: A loading platform support is provided below the rotating loading platform, and a rotating driving mechanism for driving the rotating loading platform to rotate is provided on the loading platform support, and the water supply driving mechanism is installed on the side of the loading platform support.

7. The IGBT test water cooling mechanism according to claim 6, characterized in that: The water supply drive mechanism includes a water supply bracket and a water supply drive cylinder. The water supply bracket is fixed to the side of the loading platform support, and the water supply drive cylinder is fixed to the water supply bracket. The moving end of the top of the water supply drive cylinder is provided with a water guide block, and the water supply platform is fixed to the upper end of the water guide block.

8. The IGBT test water cooling mechanism according to claim 7, characterized in that: A water guide channel connected to the water supply port is provided in the water guide block, and a water guide interface connected to the water guide channel is provided on the side of the water guide block.

9. The IGBT test water cooling mechanism according to claim 1, characterized in that: The utility model comprises a cooling box, the rotating loading platform is arranged on the top of the cooling box, and the water supply platform and the water supply driving mechanism are both arranged in the cooling box.

10. An IGBT test cooling method, characterized in that: The cooling method is implemented based on the water cooling mechanism according to claim 1, and the cooling method comprises: The IGBT device to be tested is loaded on the fixture, and the rotating loading platform drives the fixture to move to the top of the water supply platform. The water supply driving mechanism drives the water supply platform to rise and cover the air avoidance from the bottom, so that the bottom surface of the IGBT device, the hollow opening, the air avoidance and the top surface of the water supply platform are surrounded to form a water cooling cavity. Then, water is sprayed into the water cooling cavity through the water supply port, and cooling is achieved by the water sprayed from the water supply port contacting with the heat sink densely distributed at the bottom of the IGBT device. After the test of the IGBT device is completed, the water supply driving mechanism drives the water supply platform to descend to discharge the water in the water cooling cavity.

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