CN215500196U

CN215500196U - Liquid cooling inverter

Info

Publication number: CN215500196U
Application number: CN202121443459.0U
Authority: CN
Inventors: 张云戈
Original assignee: Liku New Energy Technology Shanghai Co Ltd
Current assignee: Shanghai Fenfenfen New Energy Technology Co ltd
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2022-01-11
Anticipated expiration: 2031-06-28

Abstract

The utility model relates to a liquid-cooled inverter, which comprises a shell and a main circuit board positioned in the shell, wherein a refrigerant liquid inlet and a refrigerant liquid outlet are formed in the shell, a radiating pipe is further arranged in the shell, an inlet of the radiating pipe is connected with the refrigerant liquid inlet, the radiating pipe is attached to one side of the main circuit board, power switch devices are distributed on the main circuit board on the opposite side of the radiating pipe, insulating cooling liquid is filled in the shell, and the interior of the shell is filled with the insulating cooling liquid. Compared with the prior art, the utility model has the advantages of improving the heat dissipation efficiency, and enabling the inverter to have smaller volume and higher power density.

Description

Liquid cooling inverter

Technical Field

The utility model relates to the technical field of inverters, in particular to a liquid-cooled inverter.

Background

With the development of technical requirements, the requirement of the inverter on the transformation power is higher and higher, but the requirement of the inverter on the lack of volume is smaller and smaller, so that the unit work of the internal power device is larger and larger, the corresponding heating power density is increased rapidly, and the heating power density of the power device is increased rapidlyCan already be up to 100W/cm²The heat dissipation limit of the traditional air cooling is almost reached, and the requirement of an inverter with high power is difficult to meet only by air cooling heat dissipation. Meanwhile, the huge fan and the heat sink in the air-cooled heat dissipation system basically occupy half of the space of the whole inverter, and the technical development trend of the miniaturized and light inverter cannot be met. In addition, to the equipment of this kind of open-air use of new energy automobile charging pile, its dc-to-ac converter receives influences such as dust, high temperature, rainwater because the forced air cooling also need expose outside, reduces job stabilization nature, reduces life.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a liquid-cooled inverter, which effectively reduces the volume of the inverter, improves the power density of the inverter and simultaneously improves the use reliability of the inverter.

The purpose of the utility model can be realized by the following technical scheme:

the utility model provides a liquid-cooled inverter, includes casing and the main circuit board that is located the casing, be equipped with refrigerant inlet and refrigerant liquid outlet on the casing, still be equipped with the cooling tube in the casing, the entry linkage refrigerant inlet of cooling tube and the cooling tube laminating is in one side of main circuit board, and it has the power switch device to distribute on the main circuit board of cooling tube opposite side, the casing intussuseption is filled with insulating coolant liquid, and this insulating coolant liquid is full of inside the casing.

Furthermore, radiating fins are arranged in the radiating pipe, one end of the radiating pipe is connected with the side wall of the shell in a sealing mode, and the refrigerant liquid inlet is formed in the side wall and communicated with the radiating pipe.

Furthermore, the radiating pipe and the main circuit board are bonded or welded with each other through heat conducting glue.

Furthermore, the radiating pipe is arranged along the bottom of the shell, and the refrigerant liquid inlet is located at the bottom of the side end of the shell.

Furthermore, the refrigerant inlet and the refrigerant outlet are arranged on the shell in an opposite angle.

Furthermore, the outlet of the radiating pipe is provided with a grid plate.

Furthermore, an alternating current connector, a direct current connector and a control signal connector are arranged on the main circuit board, and the alternating current connector, the direct current connector and the control signal connector penetrate through the side wall of the shell and are connected with the side wall of the shell in a sealing mode.

Further, the radiating pipe is a rectangular pipe.

Further, the insulating cooling liquid is electronic fluorinated liquid, insulating silicone oil or transformer oil.

Compared with the prior art, the utility model has the following beneficial effects:

1. the main circuit board in the inverter is completely immersed in the insulating cooling liquid, the traditional air cooling system is removed, the thermal resistance between a power device on the circuit board and a cooling medium can be reduced, the heat dissipation efficiency is improved, and the inverter can have smaller volume and higher power density. Simultaneously, through the setting of cooling tube in the casing, insulating coolant liquid can be preferentially cooled off the high power switch device of calorific capacity, improves the radiating effect.

2. The radiating pipe is internally provided with the fins to improve the contact area between the radiating pipe and the low-temperature insulating cooling liquid, so that the radiating of the power switch device part is better carried out.

3. The radiating pipe is arranged along the bottom of the shell, so that the water outlet of the radiating pipe forms circulation along the inner wall of the shell, and the convection and the heat dissipation are enhanced.

4. The grid plate is arranged at the liquid outlet of the radiating pipe, so that insulating cooling liquid with higher flow can be used, buffering and shunting are formed, and impact on internal electric devices is avoided.

5. The cooling tube can maximize the utilization casing inner space for the rectangular pipe, realizes that the structure is miniaturized.

6. All parts of the inverter are sealed in the shell and are not affected by external environments such as dust, rainwater and the like, so that the service life of the power module is prolonged.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is an internal schematic view of the present invention.

Fig. 3 is a schematic structural diagram of the main circuit board and the radiating pipe.

FIG. 4 is a schematic representation of the combination of the present invention.

Reference numerals: 1. the cooling device comprises a shell, 11, a refrigerant inlet, 12, a refrigerant outlet, 13, an alternating current connector, 14, a direct current connector, 15, a control signal connector, 2, a main circuit board, 21, a power switch device, 22, a power magnetic device, 23, a control circuit, 3, a radiating pipe, 31 and a grid plate.

Detailed Description

The utility model is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1 to 3, the present embodiment provides a liquid-cooled inverter including a case 1 and a main circuit board 2 located inside the case 1. The shell 1 is a rectangular aluminum alloy shell, and a refrigerant inlet 11 and a refrigerant outlet 12 are arranged on the shell 1 and both adopt common quick connectors. In this embodiment, the refrigerant inlet 11 and the refrigerant outlet 12 are located on two opposite side end walls and are arranged diagonally to each other, the refrigerant inlet 11 is located at the lower left corner, and the refrigerant outlet 12 is located at the upper right corner. Low-temperature insulating cooling liquid enters the shell 1 from the lower refrigerant liquid inlet 11 to exchange heat with the inner main circuit board 2, and high-temperature insulating cooling liquid after heat exchange flows out from the upper refrigerant liquid outlet 12 to complete heat exchange with the inverter. The insulating cooling liquid can be electronic fluorinated liquid, insulating silicone oil, transformer oil, etc.

The main circuit board 2 is provided with a control circuit 23, a power magnetic device 22, a power switching device 21, and the like. The power magnetic device 22 and the power switch are located on the front side of the main circuit board 2, and the control circuit 23 is distributed on the back side of the main circuit board 2. The power switch device 21 is a high-power IGBT module but not limited to the IGBT module, the power magnetic device 22 is an inductor but not limited to the inductor device, and the power switch device 21 and the power magnetic device 22 complete power conversion of a main circuit to convert direct current into alternating current. Each power switching device 21 includes a driving circuit for driving and controlling the switching of the power switching device 21, and the control circuit 23 is internally programmed to perform control of the driving circuit and detection and control of various signals.

An alternating current connector 13, a direct current connector 14 and a control signal connector 15 are also arranged on the main circuit board 2. The alternating current connector 13, the direct current connector 14 and the control signal connector 15 all penetrate through the side wall of the shell 1 and are in sealed connection with the side wall of the shell 1. An external alternating current power supply is connected with the main circuit board 2 through an alternating current connector 13, and direct current is output through a direct current connector 14 after being converted by the main circuit board 2, so that power conversion is completed. The external control signal is connected with the circuit board in a communication way through the control signal connector 15.

Still be equipped with the cooling tube 3 in casing 1, the inlet of cooling tube 3 is connected refrigerant inlet 11 and cooling tube 3 laminates in one side of main circuit board 2, and the laminating position of cooling tube 3 on main circuit board 2 is the back of power switch module. The specific development is as follows: the cooling tube 3 is welded to the inner wall of the casing 1 along the bottom of the casing 1, and the other end is spaced from the inner wall of the casing 1 by a certain distance. The radiating pipe 3 is a rectangular pipe, and one side surface of the rectangular pipe is completely attached to the main circuit board 2. The radiating pipe 3 and the main circuit board 2 can be bonded or welded with each other by a heat conducting glue, and preferably, the heat conducting glue is used for bonding. The radiating pipe 3 is arranged along the bottom of the shell 1, so that the water discharged from the radiating pipe 3 can circulate along the inner wall of the shell 1, and the convection and the heat dissipation are enhanced.

In another embodiment, the heat dissipating pipe 3 is provided with heat dissipating fins therein to increase the contact area between the heat dissipating pipe 3 and the low temperature insulating coolant, thereby better performing the preferential heat dissipation of the power switching device 21.

In another embodiment, the outlet of the heat pipe 3 is provided with a grid plate 31, so that the insulating cooling liquid with a higher flow rate can be introduced into the cooling medium inlet 11, thereby improving the heat dissipation effect. The grid plate 31 cushions and diverts the flow of liquid and avoids impact on the internal electrical components.

As shown in fig. 4, the inverter of this embodiment can be configured as a sheet structure because the conventional air cooling system is removed, and a plurality of inverters are combined, so that series and parallel connection of circuits can be realized, and applications in different scenes can be satisfied.

The foregoing detailed description of the preferred embodiments of the utility model has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a liquid-cooled inverter, its characterized in that, includes casing (1) and main circuit board (2) that are located casing (1), be equipped with refrigerant inlet (11) and refrigerant liquid outlet (12) on casing (1), still be equipped with cooling tube (3) in casing (1), the entry linkage refrigerant inlet (11) of cooling tube (3) and cooling tube (3) laminating in one side of main circuit board (2), it has power switch device (21) to distribute on main circuit board (2) of cooling tube (3) opposite side, casing (1) intussuseption is filled with insulating coolant liquid, and this insulating coolant liquid is full of inside casing (1).

2. The liquid-cooled inverter as claimed in claim 1, wherein the heat dissipating pipe (3) is provided with heat dissipating fins therein, one end of the heat dissipating pipe (3) is hermetically connected to a side wall of the housing (1), and the coolant inlet (11) is disposed on the side wall and is communicated with the heat dissipating pipe (3).

3. A liquid-cooled inverter as claimed in claim 1, wherein the radiating pipe (3) and the main circuit board (2) are bonded or welded to each other by a heat conducting adhesive.

4. The liquid-cooled inverter as claimed in claim 1, wherein the heat pipe (3) is disposed along the bottom of the housing (1), and the coolant inlet (11) is located at the bottom of the side end of the housing (1).

5. The liquid-cooled inverter as claimed in claim 4, wherein the coolant inlet (11) and the coolant outlet (12) are arranged diagonally on the housing (1).

6. A liquid-cooled inverter as claimed in claim 1, characterized in that the outlet of the radiating pipe (3) is provided with a grid plate (31).

7. A liquid-cooled inverter as claimed in claim 1, characterized in that the main circuit board (2) is provided with an AC connector (13), a DC connector (14) and a control signal connector (15), and the AC connector (13), the DC connector (14) and the control signal connector (15) all penetrate through the side wall of the housing (1) and are hermetically connected with the side wall of the housing (1).

8. A liquid-cooled inverter as claimed in claim 1, wherein the radiating pipe (3) is a rectangular pipe.

9. The liquid-cooled inverter of claim 1, wherein the insulating coolant is an electron fluoride liquid, an insulating silicone oil, or a transformer oil.