CN219457605U - Water-cooling radiator for IGBT - Google Patents

Abstract

The utility model discloses a water-cooling radiator for an IGBT (insulated gate bipolar transistor), which comprises a radiator body, a water diffusion port, a flow guide part and a flow disturbing wing column, wherein cooling water enters a cavity in the radiator body through a water inlet pipe, then flows to the flow disturbing wing column after being guided by the flow guide part, and the flow disturbing wing column disturbs the flowing cooling water to change the flow disturbing water into turbulent flow, so that the flow speed of the cooling water on the lower end face of the IGBT module is improved, more heat can be taken away when the cooling water flows through the lower end face of the IGBT module, when a temperature sensor monitors that the short-time temperature near the lower end face of the IGBT module is higher, a water pump is started through a controller, so that the flow speed of the cooling water is greatly improved, the cooling efficiency is rapidly improved, the IGBT module is rapidly cooled, and permanent failure caused by overhigh temperature is avoided. The utility model has simple structure, small flow resistance of cooling water and high heat dissipation efficiency.

Description

Water-cooling radiator for IGBT

Technical Field

The utility model relates to the technical field of water-cooling radiators, in particular to a water-cooling radiator for an IGBT.

Background

With the development of high-power electronic devices, the capacity of the frequency converter is continuously improved, and the loss of the power electronic devices is increased. Although the air cooling mode is low in cost and the technical level is continuously improved, the heat dissipation capacity of the air cooling mode is limited, and the application of the water cooling radiator with larger heat dissipation capacity is promoted to be wider and wider. Statistics show that the IGBT failure probability caused by temperature is highest and is about 55%, the average junction temperature of the IGBT is increased by 5 degrees, the service life of the IGBT is correspondingly reduced by 20% -25%, and the excessively high temperature rise not only affects the service life of a device, but also is one of main factors directly causing permanent failure of the IGBT. Along with the continuous upgrading of application, the power element IGBT is rapidly developed towards high power, high integration level, miniaturization and light weight along with the continuous progress of the technology, and more severe requirements are provided for the heat dissipation technology of the power element IGBT, so that the development of a water-cooling radiator for the IGBT is necessary.

The patent disclosure and literature data at the present stage show that: 1) The heat of Chinese patent (publication No. CN 218182204U) is conducted to the tooth radiating fins of the radiating cavity, the main water inlet in the bottom plate is filled with cold water, the cold water enters the branch water inlet pipeline of each radiating cavity through the main pipeline, the temperature of the tooth radiating fins in the radiating cavity is reduced, and finally the cold water finally flows into the main water outlet pipeline through the branch water outlet pipeline in the radiating cavity, so that the effect of cooling is achieved, the heat conduction of the radiating fins is used for cooling the IGBT, and the cooling efficiency is low; 2) The external cooling water of China patent (publication No. CN 210040183U) enters into the cooling cavity in the body of the water cooler through the water inlet pipe, then the water flow impacts the water blocks, the water blocks are used for exciting the water, the water flow splashes on the lower end face of the IGBT module, so that the water on the lower end face of the IGBT module has a certain speed, the water flows on the lower end face of the IGBT module at a certain speed, heat of the IGBT module is taken away, however, the water blocks are cuboid, the flowing resistance of the cooling water is large, and therefore the heat dissipation efficiency is reduced.

In summary, although the existing IGBT water-cooling radiator realizes the water-cooling heat dissipation of the IGBT to a certain extent, there are still a number of disadvantages, and therefore, a water-cooling radiator for the IGBT is proposed.

Disclosure of Invention

The utility model aims to overcome the existing defects, and provides a water-cooling radiator for an IGBT, which has the advantages of simple structure and high radiating efficiency; the diversion part is radial, the beginning of the water inlet end is gradually enlarged, and the beginning of the water outlet end is gradually reduced, so that the flow resistance of cooling water can be effectively reduced; the turbulent fin columns can disturb the flowing cooling water to change the turbulent flow into turbulent flow, so that the flowing speed of the cooling water on the lower end face of the IGBT is improved, the tips of the turbulent fin columns face the drainage end, and the flowing resistance of the cooling water is further reduced; the temperature sensor is arranged at the upper end face of the radiator body, the temperature near the lower end face of the IGBT can be monitored, when the short-time temperature is high, the water pump is started, the flow speed of cooling water is greatly improved, the cooling efficiency is rapidly improved, rapid cooling is realized, and the problem in the background technology can be effectively solved.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a water-cooling radiator for IGBT comprises a radiator body, a water diffusion port, a flow guide part and a flow disturbance wing column;

the radiator body is of a cavity structure, a water inlet pipe is arranged on one side of the radiator body, a water drain pipe is arranged on the other side of the water inlet pipe, a plurality of water diffusion ports are linearly arranged on the upper end face of the radiator body, a silicon rubber ring is arranged in a groove on the periphery of each water diffusion port, each water diffusion port is correspondingly and spirally connected with one IGBT module, a diversion part is arranged on the lower bottom face of the inside of the radiator body, which is close to the water inlet pipe and the water drain pipe, a plurality of vortex wing columns are arranged between the two diversion parts, and sealing gaskets matched with the diversion parts and the vortex wing columns are arranged on the upper end of the lower bottom face of the inside of the radiator body.

Preferably, the radiator body is made of aluminum alloy, the water diffusion opening and the radiator body are integrally formed, and the width of the silicone rubber ring is larger than the depth of the groove around the water diffusion opening.

Preferably, the guide part is welded with the radiator body, the guide part is radial, the guide part comprises a plurality of guide plates, the guide plates in the middle of the guide part are in a water drop shape, the other guide plates are in arc shapes, the opening formed at the guide part of the water inlet pipe end is gradually enlarged, and the opening formed at the guide part of the water outlet pipe end is gradually reduced.

Preferably, the turbulent fin column is welded with the radiator body, the turbulent fin column is in a water drop shape, and the tip of the turbulent fin column faces the drain pipe.

Preferably, the water pump is installed on the drain pipe in a penetrating way, the water pump is in threaded connection with the drain pipe, the water inlet pipe, the drain pipe and the radiator body are in threaded connection, and raw material belts are wound at the threaded connection positions.

Preferably, a temperature sensor is arranged on the upper end face of the radiator body, the temperature sensor is located between two adjacent water diffusion ports, and a probe of the temperature sensor is located inside the radiator body.

Compared with the prior art, the utility model has the beneficial effects that: the cooling water enters the cavity in the radiator body through the water inlet pipe, the cooling water flows to the turbulent fin columns after being guided by the guide parts, the turbulent fin columns disturb the flowing cooling water to change the turbulent flow into turbulent flow, so that the flow speed of the cooling water on the lower end face of the IGBT module is improved, more heat can be taken away when the cooling water flows through the lower end face of the IGBT module, the guide parts are radial, the opening of the water inlet end is gradually enlarged, the opening of the water outlet end is gradually reduced, the flow resistance of the cooling water can be effectively reduced, in addition, the tip end of the turbulent fin columns faces the water outlet end, and the flow resistance of the cooling water is further reduced; when the temperature sensor monitors that the short-time temperature near the lower end face of the IGBT module is higher, the water pump is started through the controller, so that the flow speed of cooling water is greatly improved, the cooling efficiency is rapidly improved, the IGBT module is rapidly cooled, and permanent failure caused by overhigh temperature is avoided. The utility model has the advantages of simple structure, small flow resistance of cooling water, high heat dissipation efficiency and the like.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a top view of the present utility model;

FIG. 3 is a front elevational view in full section of the present utility model;

fig. 4 is a schematic structural view of the gasket of the present utility model.

In the figure: the radiator comprises a radiator body 1, a water diffusion port 2, a silicone rubber ring 3, a sealing gasket 4, a flow guiding part 5, a flow disturbing wing column 6, a water inlet pipe 7, a water outlet pipe 8, a water pump 9, a temperature sensor 10 and an IGBT module 11.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides a technical solution: a water-cooling radiator for IGBT comprises a radiator body 1, a water diffusion port 2, a flow guiding part 5 and a flow disturbing fin column 6; the radiator body 1 is of a cavity structure, one side of the radiator body 1 is provided with a water inlet pipe 7, the other side of the radiator body 1 is provided with a water outlet pipe 8 opposite to the water inlet pipe 7, the water inlet pipe 7 and the water outlet pipe 8 are communicated with the inner cavity of the radiator body 1, the upper end face of the radiator body 1 is linearly provided with a plurality of water diffusion ports 2, a silicon rubber ring 3 is arranged in a groove around the water diffusion ports 2, the silicon rubber ring 3 has a sealing effect, cooling water is prevented from overflowing, the upper end of each water diffusion port 2 is correspondingly connected with one IGBT module 11 in a screwed mode, the lower bottom face of the inner part of the radiator body 1 is close to the water inlet pipe 7 and the water outlet pipe 8, a plurality of flow-disturbing wing columns 6 are arranged between the two flow-disturbing sections 5, cooling water enters the cavity of the radiator body 1 through the water inlet pipe 7, the cooling water flows to the flow-disturbing wing columns 6 after being guided by the flow-disturbing columns 5, the cooling water flowing through the flow-disturbing columns 6 disturb the cooling water, the cooling water changes from a turbulent state to a turbulent state, the flowing speed of the cooling water at the lower end face of the IGBT module 11 is improved, more heat can be taken away when the cooling water flows through the lower end face of the IGBT module 11, and the heat dissipation of the IGBT module 11 is accelerated;

furthermore, the radiator body 1 is made of aluminum alloy, the purpose of accelerating heat dissipation can be achieved by adopting the aluminum alloy, the diffusion nozzle 2 and the radiator body 1 are integrally formed, the width of the silicone rubber ring 3 is larger than the depth of the groove around the diffusion nozzle 2, and the silicone rubber ring 3 is tightly pressed when the IGBT module 11 is screwed and connected, so that the sealing purpose is achieved;

further, the diversion part 5 is welded with the radiator body 1, the diversion part 5 is radial, the diversion part 5 comprises a plurality of diversion plates, the diversion plates in the middle of the diversion part 5 are in a water drop shape, the other diversion plates are in an arc shape, the opening formed by the diversion part 5 at the end of the water inlet pipe 7 is gradually enlarged, and the opening formed by the diversion part 5 at the end of the water outlet pipe 8 is gradually reduced, so that the flow resistance of cooling water can be effectively reduced by adopting the design; the turbulent fin columns 6 are welded with the radiator body 1, the turbulent fin columns 6 are in a water drop shape, and the tips of the turbulent fin columns 6 face the drain pipe 8, so that the flow resistance of cooling water can be further reduced; the upper end of the lower bottom surface inside the radiator body 1 is provided with a sealing gasket 4 which is matched with the flow guide part 5 and the turbulent fin column 6, the sealing gasket 4 can play a role in sealing, and cooling water can be prevented from contacting with welding points of the flow guide part 5, the turbulent fin column 6 and the radiator body 1, so that contact corrosion is avoided;

furthermore, the water pump 9 is arranged on the water drain pipe 8 in a penetrating manner, the water pump 9 is in threaded connection with the water drain pipe 8, if necessary, the water pump 9 is started, the flow speed of cooling water is increased, the flow rate of the cooling water is increased, heat can be taken away more quickly, the water inlet pipe 7 and the water drain pipe 8 are in threaded connection with the radiator body 1, and raw material belts are wound at the threaded connection positions;

in addition, the upper end face of the radiator body 1 is provided with a temperature sensor 10, the temperature sensor 10 is positioned between two adjacent water diffusion ports 2, a probe of the temperature sensor 10 is positioned inside the radiator body 1, the temperature of cooling water is monitored through the temperature sensor 10, and when the temperature sensor 10 monitors that the short-time temperature near the lower end face of the IGBT module is higher, the water pump 9 is started through the controller;

specifically, the model of the water pump 9 is RGB15-20, the model of the temperature sensor 10 is SBWZ, the water pump further comprises a controller, the temperature sensor 10 feeds back signals to the controller, the controller controls the water pump 9 to work, and the model of the controller is HK-Y2S.

Working principle: when the radiator is used, external cooling water enters the cavity in the radiator body 1 through the water inlet pipe 7, then flows to the turbulence fin columns 6 after being guided by the guide parts 5, and the turbulence fin columns 6 disturb the flowing cooling water to change the flowing cooling water from turbulence to turbulence, so that the flowing speed of the cooling water on the lower end face of the IGBT module 11 is improved, and more heat can be taken away when the cooling water flows through the lower end face of the IGBT module 11; when the temperature sensor 10 monitors that the short-time temperature near the lower end face of the IGBT module 11 is higher, the water pump 9 is started through the controller, so that the flow speed of cooling water is greatly improved, the cooling efficiency is rapidly improved, the IGBT module 11 is rapidly cooled, permanent failure caused by overhigh temperature is avoided, and finally the cooling water is discharged from the drain pipe 8.

Although embodiments of the present utility model 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 therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. A water-cooled radiator for IGBTs, characterized in that: comprises a radiator body (1), a water diffusion port (2), a flow guiding part (5) and a turbulent fin column (6);

radiator fuselage (1) is cavity structure, radiator fuselage (1) one side is equipped with inlet tube (7), be equipped with drain pipe (8) for inlet tube (7) opposite side, a plurality of diffuse water mouth (2) have been arranged to radiator fuselage (1) up end linearity, be equipped with silicone rubber circle (3) in the peripheral recess of diffuse water mouth (2), every diffuse water mouth (2) upper end corresponds a spiro union IGBT module (11), radiator fuselage (1) inside lower bottom surface is close to inlet tube (7) and drain pipe (8) department all is equipped with water conservancy diversion portion (5), be equipped with a plurality of vortex wing post (6) between two water conservancy diversion portions (5), radiator fuselage (1) inside lower bottom surface upper end is equipped with sealing pad (4) with water conservancy diversion portion (5), vortex wing post (6) adaptation.

2. A water cooled heat sink for an IGBT as claimed in claim 1, wherein: the radiator body (1) is made of aluminum alloy, the water diffusion opening (2) and the radiator body (1) are integrally formed, and the width of the silicone rubber ring (3) is larger than the depth of the groove around the water diffusion opening (2).

3. A water cooled heat sink for an IGBT as claimed in claim 1, wherein: the radiator is characterized in that the flow guide part (5) is welded with the radiator body (1), the flow guide part (5) is radial, the flow guide part (5) comprises a plurality of flow guide plates, the flow guide plates in the middle of the flow guide part (5) are in the shape of water drops, the other flow guide plates are in the shape of arcs, the opening formed by the flow guide part (5) at the end of the water inlet pipe (7) is gradually enlarged, and the opening formed by the flow guide part (5) at the end of the water outlet pipe (8) is gradually reduced.

4. A water cooled heat sink for an IGBT as claimed in claim 1, wherein: the turbulent fin column (6) is welded with the radiator body (1), the turbulent fin column (6) is in a water drop shape, and the tip of the turbulent fin column (6) faces the drain pipe (8).

5. A water cooled heat sink for an IGBT as claimed in claim 1, wherein: the water pump (9) is installed on the water drain pipe (8) in a penetrating mode, the water pump (9) is in threaded connection with the water drain pipe (8), the water inlet pipe (7), the water drain pipe (8) are in threaded connection with the radiator body (1), and raw material belts are wound on threaded connection positions.

6. A water cooled heat sink for an IGBT as claimed in claim 1, wherein: the radiator is characterized in that a temperature sensor (10) is arranged on the upper end face of the radiator body (1), the temperature sensor (10) is located between two adjacent water diffusion ports (2), and a probe of the temperature sensor (10) is located inside the radiator body (1).