CN112435973A

CN112435973A - Switch tube heat dissipation assembly

Info

Publication number: CN112435973A
Application number: CN202011391165.8A
Authority: CN
Inventors: 戚宇生; 姜颖异; 黄猛; 黄颂儒; 黎俊麟; 徐志国
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-12-02
Filing date: 2020-12-02
Publication date: 2021-03-02

Abstract

The invention discloses a switch tube heat radiation component, which comprises: the heat exchanger plate is internally provided with a channel for circulating cooling liquid, and both sides of the heat exchanger plate form heat exchange surfaces; and all the switch tubes are respectively arranged on two sides of the heat exchange plate. The switch tube heat dissipation assembly effectively solves the problems that the switch tube in the prior art occupies too large space and is insufficient in heat dissipation.

Description

Switch tube heat dissipation assembly

Technical Field

The invention relates to the technical field of semiconductors, in particular to a switch tube heat dissipation assembly.

Background

With the development of basic science such as material science, electronic information technology, packaging technology and the like, a switching tube (such as an IGBT or an MOS tube) is gradually replaced by a discrete switching tube (such as an IGBT) device due to the reasons of price, performance and the like. In the fields of switching power supplies, photovoltaic inverters and the like, switching tubes (such as IGBTs) have been widely used. However, in practical applications, the performance and reliability of the switching tube (e.g., IGBT) are affected by the installation and fixation of the switching tube (e.g., IGBT), and thus the quality of the product is affected. For some occasions with larger power, the natural heat dissipation and the radiation heat dissipation of the switch tube (such as an IGBT) cannot meet the heat dissipation requirement of the switch tube (such as an IGBT), and a heat radiator is often required to be installed on the switch tube (such as an IGBT) to increase the heat dissipation area of the module for auxiliary heat dissipation.

The switch tube generates a large amount of heat during operation, and if the heat cannot be taken away in time, the operation stability and reliability of the power system equipment can be affected. In the prior art, the switch tube occupies too large space and is not fully cooled.

Disclosure of Invention

The embodiment of the invention provides a switch tube heat dissipation assembly, which aims to solve the problems that the switch tube in the prior art occupies too large space and is insufficient in heat dissipation.

In order to achieve the above object, the present invention provides a heat dissipation assembly for a switching tube, comprising: the heat exchanger plate is internally provided with a channel for circulating cooling liquid, and both sides of the heat exchanger plate form heat exchange surfaces; and all the switch tubes are respectively arranged on two sides of the heat exchange plate.

Further, the channels are arranged in an S-shape.

Furthermore, the channel comprises a plurality of straight-line-section flow channels, the straight-line-section flow channels are arranged in parallel, and all the straight-line-section flow channels are spread along the heat exchange plate.

Furthermore, a cooling liquid inlet end and a cooling liquid outlet end are arranged on the heat exchange plate and are communicated with the channel.

Further, still include: the installation piece, installation piece detachably connects on the heat transfer board, and the position of installation piece corresponds the setting with coolant liquid entrance point and coolant liquid exit end, is provided with the intercommunication mouth with coolant liquid entrance point and coolant liquid exit end intercommunication on the installation piece, and the coolant liquid pipeline passes through intercommunication mouth and passageway intercommunication.

Further, the coolant inlet port and the coolant outlet port are located on the same side of the heat exchange plate.

Further, the coolant inlet port and the coolant outlet port are disposed adjacent to each other.

Further, the coolant inlet end and the coolant outlet end are located on the same side of the heat exchanger plate.

Further, still include: the anti-scaling component is rotatably arranged in the channel, and the outer diameter of the anti-scaling component is smaller than the inner diameter of the channel.

Further, the scale prevention member includes: the spiral band is suspended in the channel and can rotate along the self central shaft, and the spiral band rotates after water flow impact.

Furthermore, the number of the spiral bands is at least two, and the two spiral bands are connected through a flexible connecting rod.

Further, the anti-scaling part further comprises fixing rings, the fixing rings are located at two ends of the anti-scaling part and connected with the corresponding spiral bands, the periphery of the fixing rings is matched with the channel, and the axis of the fixing rings is collinear with the central shaft of the spiral bands.

Further, still include: the installation frame, installation frame connection is on the heat transfer board, and the installation frame has the mounting groove, and the switch tube is installed in the mounting groove, and the switch tube passes through installation frame fixed connection on the heat transfer board.

Further, the bottom surface of switch tube scribbles the heat-conducting layer, and the switch tube passes through the screw installation in the mounting groove.

Further, the groove depth of mounting groove is less than the height of switch tube, and the connecting point of switch tube is higher than the installation frame.

Further, the installation frame is a plurality of, and the installation frame is located the both sides of heat transfer board respectively, and all installation frames set up for the heat transfer board symmetry.

Further, still include: the fixing columns penetrate through the heat exchange plate and penetrate through two sides of the heat exchange plate, and every two mounting frames positioned on two sides of the heat exchange plate are arranged corresponding to the fixing columns; and the fixing screws penetrate through the installation frames and are in threaded connection with the fixing columns, and every two installation frames positioned on two sides of the heat exchange plate are connected to the fixing columns through the fixing screws.

Furthermore, the fixed columns are copper columns.

The switch tubes are arranged on two sides of the heat exchange plate, double-sided arrangement is achieved, the heat exchange surfaces of the heat exchange plate can be effectively utilized, heat exchange efficiency is improved, and heat dissipation of the switch tubes is more sufficient. Compared with the structure that the switch tube in the prior art is radiated on one side, the switch tube radiating assembly can effectively save space.

Drawings

Fig. 1 is a schematic structural diagram of a heat dissipation assembly of a switch tube according to an embodiment of the present invention;

FIG. 2 is a schematic top view of the switch tube heat sink assembly of FIG. 1;

FIG. 3 is a schematic diagram of the internal structure of the heat sink assembly of FIG. 1;

FIG. 4 is a schematic view of a structural fit of a heat exchange plate of the switch tube heat dissipation assembly of FIG. 1;

FIG. 5 is a schematic structural diagram of a scale prevention part of the switch tube heat dissipation assembly of FIG. 1;

fig. 6 is an exploded view of a heat sink assembly of a switch tube according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of a mounting frame of the switch tube heat sink assembly of FIG. 6;

fig. 8 is a schematic perspective view of a heat dissipation assembly of a switch tube according to an embodiment of the present invention;

fig. 9 is an interior mounting fit schematic of the switch tube heat sink assembly of fig. 8.

Detailed Description

The invention is described in further detail below with reference to the figures and the examples, but without limiting the invention.

Referring to fig. 1 to 5, according to an embodiment of the present invention, a switching tube heat dissipation assembly is provided, which includes a heat exchange plate 10 and a plurality of switching tubes 30, wherein a channel 20 for circulating a cooling fluid is disposed inside the heat exchange plate 10, and both sides of the heat exchange plate 10 form heat exchange surfaces. All the switching tubes 30 are arranged on both sides of the heat exchanger plate 10, respectively.

The switch tubes (such as IGBTs) are arranged on two sides of the heat exchange plate 10, and are arranged on two sides, so that the heat exchange surfaces of the heat exchange plate 10 can be effectively utilized, the heat exchange efficiency is increased, and the heat dissipation of the switch tubes is more sufficient. Compared with the structure that the switch tube in the prior art is radiated on one side, the switch tube radiating assembly can effectively save space.

The channels 20 are in an S-shaped arrangement. The S-shaped channel 20 can increase the self-circulation length, and the heat exchange performance is improved to the maximum extent. The S-shaped channel 20 is designed as a buried copper tube, i.e. the channel 20 is arranged inside the heat exchanger plate as described above.

Preferably, the S-shaped channel 20 has a specific shape as shown in fig. 3 and 4, the channel 20 includes a plurality of straight-line flow channels 21, the straight-line flow channels 21 are arranged in parallel, and all the straight-line flow channels 21 are arranged along the heat exchange plate 10. Two adjacent straightway runners 21 are connected through the bent section, the arrangement of a plurality of straightway runners is longer than that of a common serial arrangement, the arrangement mode of the straightway runners 21 can enable the heat exchange plate 10 to have strong heat exchange capacity, the temperature uniformity of the heat exchange plate 10 can be improved, and the structure is simple.

Preferably, as shown in fig. 2 to 4, the heat exchange plate 10 is provided with a cooling liquid inlet end 11 and a cooling liquid outlet end 12, and the cooling liquid inlet end 11 and the cooling liquid outlet end 12 are communicated with the channels 20. External cooling liquid enters the channel 20 from a cooling liquid inlet end 11 (cold end), and flows out from a cooling liquid outlet end 12 (hot end) after heat exchange.

For convenience of installation, the switch tube heat dissipation assembly further comprises an installation block 40, the installation block 40 is detachably connected to the heat exchange plate 10, the installation block 40 is arranged corresponding to the coolant inlet end 11 and the coolant outlet end 12, a communication port 41 communicated with the coolant inlet end 11 and the coolant outlet end 12 is arranged on the installation block 40, and the coolant pipeline is communicated with the channel 20 through the communication port 41. The external coolant pipelines are all hermetically connected in the communication port 41 and then fixed on the heat exchange plate 10 through the mounting block 40, so that the coolant pipelines are communicated with the channel 20 and the coolant is introduced. The mounting block 40 not only has the function of mounting and fixing, but also has the function of sealing connection, so that the coolant pipeline cannot leak when being communicated. In this embodiment, the mounting block 40 is attached to the heat exchanger plate 10 by fixing pins.

In order to improve the temperature uniformity of the heat exchanger plate 10, the channels 20 are arranged in counter-flow, i.e. the coolant inlet 11 and the coolant outlet 12 are located on the same side of the heat exchanger plate 10. The same side of the heat exchanger plate refers to one of the sides of the heat exchanger plate, as can be seen in fig. 3 and 4, i.e. the coolant enters the channel 20 from one location area and exits from the same location area.

Preferably, the cooling fluid inlet end 11 and the cooling fluid outlet end 12 are arranged adjacently. Referring to fig. 3 and 4, the coolant inlet port 11 and the coolant outlet port 12 are adjacent and the coolant line butt joint may be accomplished by a mounting block 40.

The coolant inlet end 11 and the coolant outlet end 12 are located on the same side of the heat exchanger plate 10. The heat exchange plate 10 is generally rectangular plate-shaped, and the heat exchange plate 10 has two heat exchange surfaces (heat exchange surfaces on which the switch tubes are arranged) with the largest area, and also has a plurality of side surfaces, and the heat exchange plates may be located on the same side of the heat exchange plate 10 as long as they are located on the same side surface.

Although the heat exchange capacity is enhanced to a certain extent by the enhanced heat transfer mode based on the enhancement of the fluid disturbance of the near-wall surface area, the cost of the excessive increase of the fluid resistance is also paid. The temperature of the core area in the pipe is uniform, and the range of the temperature uniform area is increased as much as possible, so that the thickness of the thermal boundary layer can be reduced, the heat conduction of the boundary layer is increased by increasing the temperature gradient of the thermal boundary layer, and the purpose of heat exchange increase is achieved.

Based on the core flow principle, the invention adds a disturbance and anti-scale structure. Referring to fig. 4 and 5, the heat dissipating assembly of the switch tube further includes a scale prevention member 50, the scale prevention member 50 being rotatably disposed in the passage 20, an outer diameter of the scale prevention member 50 being smaller than an inner diameter of the passage 20. The antiscaling part 50 can rotate in the channel 20 to remove dirt on the inner wall of the channel, and can also increase the disturbance of the boundary layer, so that the temperature gradient of the fluid close to the boundary layer is increased, and the overall heat exchange effect is enhanced.

The anti-scaling member 50 comprises a helical ligament 51, the helical ligament 51 being suspended in the channel 20, the helical ligament 51 being rotatable about its central axis, the helical ligament 51 being rotatable upon impact of a water flow. Under the washing of the tube-side water flow, the upstream surface of the spiral band 51 is impacted by the water flow to rotate, so that the generation of dirt on the tube wall is prevented. In this embodiment, the spiral ligament 51 has a quadrilateral ligament structure, but may be other spiral ligaments.

Preferably, the spiral ties 51 include at least two spiral ties 51, and the two spiral ties 51 are connected by a flexible connecting rod 52. And an h-1/2D gap exists between the two spaced spiral twisted bands, so that the increase amplitude of the flow resistance is reduced, and the overall comprehensive enhanced heat transfer efficiency is ensured to show a growing trend. The spiral bands 51 are all arranged in the straight-line flow passage 21 in the embodiment, and the spiral bands 51 are regularly arranged.

The scale prevention part 50 further comprises fixing rings 53, the fixing rings 53 are located at both ends of the scale prevention part 50 and connected with the corresponding spiral bands 51, the periphery of the fixing rings 53 is matched with the channel 20, and the axis of the fixing rings 53 is collinear with the central axis of the spiral bands 51. The spiral bands 51 are connected by flexible connecting rods 52, the connecting fixing rings 53 are positioned with the tube wall, the spiral bands 51 can freely rotate around the central shaft, and the scale-proof part 50 is integrally suspended in the heat exchange tube.

The channels 20 are vertically (in the direction of the figure) arranged along the switching tubes (IGBT power modules), so that the vertical flowing distance of the cooling liquid in the heat exchange plate is maximized, and the flowing time of the cooling liquid in the heat exchange plate is prolonged. The cooling liquid is guaranteed to be in a turbulent flow state in the whole process inside the heat exchanger, the refrigerant and the switch tube perform sufficient heat exchange, and the heat dissipation effect is improved. The heat exchange plate is made of 6061 aluminum alloy, and the pipeline of the channel 20 is made of pure copper.

Referring to fig. 6 to 9, the switching tube heat dissipating assembly further includes a mounting frame 60, the mounting frame 60 is connected to the heat exchange plate 10, the mounting frame 60 has a mounting groove 61, the switching tube 30 is mounted in the mounting groove 61, and the switching tube 30 is fixedly connected to the heat exchange plate 10 by the mounting frame 60. A installation frame 60 for installing switch tube 30(IGBT) adopts insulating heat conduction material, and the module bottom surface of switch tube 30 all contacts heat conduction with installation frame 60 with surface all around, and this kind of structure cooperation is compared on heat transfer board 10 surface with switch tube 30(IGBT) direct mount, and area of contact increase makes switch tube 30(IGBT) heat transfer effect more abundant. Install through installation frame 60, guarantee to have the electric distance between switch tube and the heat transfer board, ensure abundant electrical isolation.

The bottom surface of the switch tube 30 is coated with a heat conductive layer, and the switch tube 30 is mounted in the mounting groove 61 by screws. During installation, the switch tube is backed and coated with a heat conduction layer (such as heat conduction silicone grease), installed in the installation groove 61, and fixed on the installation frame 60 through the socket head cap screws. The back of the switch tube 30 and the mounting groove 61 may have a small gap, and the contact area may be increased by applying heat-conductive silicone grease, so as to increase the heat dissipation surface area.

The mounting groove 61 has a groove depth smaller than the height of the switching tube 30, and the switching tube 30 has a connection point higher than the mounting frame 60. The connection point of the switching tube 30 is located outside the mounting frame 60, which facilitates the electrical connection of the switching tube 30.

As shown in fig. 6 and 8, the mounting frame 60 is plural, the mounting frame 60 is respectively located at both sides of the heat exchange plate 10, and all the mounting frames 60 are symmetrically arranged with respect to the heat exchange plate 10. That is, if one side of the heat exchange plate 10 is 6 mounting frames 60, and the other side is also 6 mounting frames, and two are symmetrically arranged, the whole is also symmetrically arranged.

As shown in fig. 9, the switch tube heat dissipation assembly further includes fixing posts 71 and fixing screws 72, the fixing posts 71 are disposed on the heat exchange plate 10 and penetrate through two sides of the heat exchange plate 10, and every two of the mounting frames 60 located on two sides of the heat exchange plate 10 are disposed corresponding to the fixing posts 71. Fixing screws 72 penetrate the mounting frame 60 and are screwed to the fixing posts 71, and every two mounting frames 60 located at both sides of the heat exchange plate 10 are connected to the fixing posts 71 by the fixing screws 72. Two mounting frames 60, which are symmetrically arranged on both sides of the heat exchanger plate 10, are relatively fixed by fixing posts 71 and fixing screws 72 and are simultaneously attached to the heat exchanger plate 10. Such a structure setting can make overall structure compacter, and the structure of fixed column 71 is worn to establish on heat exchange plate 10, and then can increase the heat transfer effect of installation frame 60.

Further preferably, the fixed posts 71 are copper posts. The fixed column 71 adopts a copper column, on one hand, copper has better heat conductivity and is low in cost compared with gold and silver, on the other hand, the heat exchange plate is made of aluminum generally, and the material difference can prevent the phenomenon that the same material is tightly contacted to generate permeation to cause blocking.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

Of course, the above is a preferred embodiment of the present invention. It should be noted that, for a person skilled in the art, several modifications and refinements can be made without departing from the basic principle of the invention, and these modifications and refinements are also considered to be within the protective scope of the invention.

Claims

1. A switch tube heat dissipation assembly, comprising:

the heat exchanger plate comprises a heat exchanger plate (10), wherein a channel (20) for circulating cooling liquid is arranged in the heat exchanger plate (10), and heat exchange surfaces are formed on two sides of the heat exchanger plate (10);

a plurality of switching tubes (30), all of the switching tubes (30) being arranged on both sides of the heat exchange plate (10), respectively.

2. The switch tube heat sink assembly according to claim 1, wherein the channel (20) is in an S-shaped arrangement.

3. The switch tube heat sink assembly according to claim 2, characterized in that the channel (20) comprises a plurality of straight section flow channels (21), the straight section flow channels (21) being arranged in parallel, all the straight section flow channels (21) being arranged spread out along the heat exchanger plate (10).

4. The switch tube heat sink assembly according to claim 1, wherein the heat exchanger plate (10) is provided with a cooling fluid inlet end (11) and a cooling fluid outlet end (12), the cooling fluid inlet end (11) and the cooling fluid outlet end (12) being in communication with the channel (20).

5. The switch tube heat sink assembly of claim 4, further comprising:

the heat exchange plate comprises an installation block (40), wherein the installation block (40) is detachably connected to the heat exchange plate (10), the position of the installation block (40) corresponds to the position of the cooling liquid inlet end (11) and the position of the cooling liquid outlet end (12), a communication port (41) communicated with the cooling liquid inlet end (11) and the cooling liquid outlet end (12) is formed in the installation block (40), and a cooling liquid pipeline is communicated with the channel (20) through the communication port (41).

6. The switch tube heat sink assembly according to claim 4, wherein the coolant inlet port (11) and the coolant outlet port (12) are located on the same side of the heat exchanger plate (10) at the same time.

7. The switch tube heat sink assembly according to claim 4, wherein the coolant inlet end (11) and the coolant outlet end (12) are arranged adjacent to each other.

8. The switch tube heat sink assembly according to claim 4, wherein the coolant inlet end (11) and the coolant outlet end (12) are located on the same side of the heat exchanger plate (10).

9. The switch tube heat sink assembly of claim 1, further comprising:

a scale prevention member (50), the scale prevention member (50) being rotatably arranged within the channel (20), an outer diameter of the scale prevention member (50) being smaller than an inner diameter of the channel (20).

10. Switching tube heat sink assembly according to claim 9, characterized in that the antiscaling part (50) comprises: the spiral band (51) is suspended in the channel (20), the spiral band (51) can rotate along the central shaft of the spiral band (51), and the spiral band (51) rotates after water flow impact.

11. The switch tube heat sink assembly according to claim 10, wherein the number of the spiral ties (51) is at least two, and the two spiral ties (51) are connected by a flexible link (52).

12. Switch tube heat sink assembly according to claim 10, characterized in that the fouling preventive member (50) further comprises fixing rings (53), said fixing rings (53) being located at both ends of the fouling preventive member (50) and being connected with the corresponding helical ties (51), the periphery of said fixing rings (53) matching with the channel (20), the axis of said fixing rings (53) being collinear with the central axis of the helical ties (51).

13. The switch tube heat sink assembly of claim 1, further comprising:

an installation frame (60), the installation frame (60) is connected on heat exchange plate (10), installation frame (60) has mounting groove (61), switch tube (30) are installed in mounting groove (61), switch tube (30) pass through installation frame (60) fixed connection be in on heat exchange plate (10).

14. The switch tube heat sink assembly of claim 13, wherein the bottom surface of the switch tube (30) is coated with a heat conductive layer, and the switch tube (30) is mounted in the mounting groove (61) by screws.

15. The switch tube heat sink assembly according to claim 13, wherein the mounting groove (61) has a groove depth smaller than the height of the switch tube (30), and the connection point of the switch tube (30) is higher than the mounting frame (60).

16. The switch tube heat sink assembly according to claim 13, wherein the mounting frame (60) is plural, the mounting frame (60) is respectively located at two sides of the heat exchange plate (10), and all the mounting frames (60) are symmetrically arranged with respect to the heat exchange plate (10).

17. The switch tube heat sink assembly of claim 16, further comprising:

the fixing columns (71) are arranged on the heat exchange plate (10) in a penetrating mode and penetrate through two sides of the heat exchange plate (10), and every two mounting frames (60) positioned on two sides of the heat exchange plate (10) are arranged corresponding to the fixing columns (71);

fixing screws (72), wherein the fixing screws (72) penetrate through the mounting frame (60) and are screwed on the fixing columns (71), and every two mounting frames (60) positioned at two sides of the heat exchange plate (10) are connected on the fixing columns (71) through the fixing screws (72).

18. The switch tube heat sink assembly of claim 17, wherein the fixed posts (71) are copper posts.