CN114867281A

CN114867281A - Double-sided liquid cooling radiator

Info

Publication number: CN114867281A
Application number: CN202110154921.3A
Authority: CN
Inventors: 张磊; 陈建明; 沈丁建; 张雷; 黄芳军; 安鑫
Original assignee: Zhuzhou CRRC Times Electric Co Ltd
Current assignee: Hunan Crrc Times Electric Drive Technology Co ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2022-08-05

Abstract

The invention discloses a double-sided liquid cooling radiator which comprises a plurality of radiating modules, wherein each radiating module comprises a shell with a radiating cavity, a fin assembly is arranged in each radiating cavity, and an interface is arranged on each shell; the heat dissipation modules are sequentially stacked, and adjacent heat dissipation modules are butted through interfaces, so that the heat dissipation cavities are sequentially communicated to form a cooling medium circulation channel; a mounting space for clamping a component to be cooled is formed between the shells of the adjacent heat dissipation modules; the interfaces are in clearance fit and are sealed and fixed by smearing structural adhesive. The invention has the advantages of simple and compact structure, simple and flexible assembly, low cost and the like.

Description

Double-sided liquid cooling radiator

Technical Field

The invention mainly relates to the technical field of radiators, in particular to a double-sided liquid cooling radiator.

Background

Along with the development of an electric drive system towards high integration and high power, the power requirement of a power module is higher and higher, meanwhile, the volume requirement is lighter and miniaturized, the heat dissipation requirement of the power module is higher and higher, the traditional single-side water cooling cannot meet the heat dissipation requirement, and the overall dimension is larger. Therefore, a radiator with high heat dissipation performance and a compact structure, and the number of the radiating fins can be adjusted according to the number of the modules, is urgently needed. In addition, in the current modularized radiator, the module assembling process is complex and the complete attachment of the power module and the radiator is difficult to ensure.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the problems in the prior art, the invention provides the double-sided liquid cooling radiator which is simple and compact in structure and convenient and flexible to assemble.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

a double-sided liquid cooling radiator comprises a plurality of radiating modules, wherein each radiating module comprises a shell with a radiating cavity, a fin assembly is arranged in each radiating cavity, and an interface is arranged on each shell; the heat dissipation modules are sequentially stacked, and adjacent heat dissipation modules are butted through interfaces, so that the heat dissipation cavities are sequentially communicated to form a cooling medium circulation channel; an installation space for clamping a component to be cooled is formed between the shells of the adjacent heat dissipation modules; the interfaces are in clearance fit and are sealed and fixed by smearing structural adhesive.

As a further improvement of the above technical solution:

in two adjacent casings, the interface of one side of one casing is an inner pipe, the interface of one side of the other casing is an outer pipe, and the inner pipe is inserted into the outer pipe to form clearance fit.

And the outer wall of the inner pipe is provided with a glue storage groove.

The end of the inner pipe is provided with a chamfer so as to be convenient for butt joint and guide with the outer pipe.

The end of the outer pipe is provided with a chamfer so as to be convenient for butt joint and guide with the inner pipe.

The inner part of the outer pipe is provided with a step to be abutted against the end part of the inner pipe.

More than one partition board arranged in parallel is arranged in the shell and used for dividing the heat dissipation cavity into a plurality of cavities; through holes are formed in the positions of the interfaces of the partition boards and are used for communicating the cavities; the fin assembly comprises more than one group of fin units, and each fin unit is respectively positioned in each cavity.

Each fin unit comprises two staggered-tooth fins.

The shell is formed by enclosing two core plates.

And a liquid inlet and a liquid outlet are formed in the outer side of one of the heat dissipation modules positioned at the outermost side in the heat dissipation modules which are sequentially stacked.

Compared with the prior art, the invention has the advantages that:

according to the double-sided liquid cooling radiator, the two radiating modules are in butt joint through interface clearance fit, and are sealed and fixed through the structural adhesive, so that the whole assembly process is simple, the production cost is reduced, and the number of the radiating modules can be flexibly adjusted according to the power requirement; in addition, the power module is clamped by the two heat dissipation modules, so that the installation gap between the heat dissipation modules and the power module is eliminated, the heat dissipation efficiency is improved, and the overall structural size of the radiator is effectively simplified, so that the overall structure of the radiator is compact; in addition, the whole structure is free of the insulating substrate and the stress relaxation member, and the cost can be further reduced.

According to the double-sided liquid cooling radiator disclosed by the invention, the fins in each fin unit adopt the staggered tooth structure, so that the contact area of fluid is increased, and the radiating efficiency is improved.

Drawings

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

Fig. 2 is a sectional view a-a of fig. 1.

Fig. 3 is a sectional view B-B of fig. 1.

Fig. 4 is a schematic diagram of an interface structure in the present invention.

Fig. 5 is a schematic structural diagram of a fin unit in an embodiment of the present invention.

The reference numbers in the figures denote: 1. a heat dissipation module; 11. a housing; 111. a core board; 12. an interface; 121. an inner tube; 1211. a glue storage tank; 122. an outer tube; 1221. a step; 123. chamfering; 13. a fin assembly; 131. a fin unit; 1311. a fin; 1312. a partition plate; 14. structural adhesive; 2. a liquid inlet pipe; 3. a liquid outlet pipe; 4. and a power module.

Detailed Description

The invention is further described below with reference to the figures and the specific embodiments of the description.

As shown in fig. 1 to 3, the double-sided liquid-cooled heat sink of the present embodiment includes a plurality of heat dissipation modules 1, each heat dissipation module 1 includes a housing 11 having a heat dissipation cavity, the housing 11 is provided with an interface 12, and the heat dissipation cavity is provided with a fin assembly 13; the heat dissipation modules 1 are sequentially stacked to form a radiator, and the adjacent heat dissipation modules 1 are butted through the interfaces 12, so that the heat dissipation cavities are sequentially communicated to form a cooling medium circulation channel; wherein a mounting space for sandwiching a component to be cooled (such as the power module 4) is formed between the housings 11 of the adjacent heat dissipation modules 1, that is; the interfaces 12 are in clearance fit and are sealed and fixed by coating structural adhesive 14. The double-sided liquid cooling radiator is specifically applied to the power module 4 of the motor controller, and of course, can also be applied to other occasions needing cooling.

According to the double-sided liquid cooling radiator, the two radiating modules 1 are in clearance fit through the interfaces 12 to realize butt joint, and are sealed and fixed through the structural adhesive 14, so that the whole assembly process is simple, the production cost is reduced, and the number of the radiating modules 1 can be flexibly adjusted according to the power requirement; in addition, the power module 4 is clamped by the two heat dissipation modules 1, so that the installation gap between the heat dissipation modules 1 and the power module 4 is eliminated, the heat dissipation efficiency is improved, and the overall structural size of the radiator is effectively simplified, so that the overall structure of the radiator is compact; in addition, the whole structure is free of the insulating substrate and the stress relaxation member, and the cost can be further reduced.

As shown in fig. 3 and 4, in a specific embodiment, in two adjacent shells 11, the interface 12 on one side of one shell 11 is an inner tube 121, and the interface 12 on one side of the other shell 11 is an outer tube 122, and the inner tube 121 is inserted into the outer tube 122, so as to form a clearance fit, wherein the single-side clearance is controlled within 0.5 mm. In addition, the height H of the outer tube 122 should be greater than the height L of the inner tube 121, so that there is a certain gap between the ribs of the outer tube 122 and the inner tube 121. After the inner pipe 121 and the outer pipe 122 are in clearance fit, the structural adhesive 14 is coated for sealing and fixing, wherein the structural adhesive 14 meets the use requirement of minus 40 ℃ to 180 ℃ and meets the sealing and fixing requirements, namely, the joint has no leakage under the pressure of 2 Mpa. Specifically, a glue storage groove 1211 is formed in the outer wall of the inner tube 121 and used for storing the structural glue 14, so that the matching strength of the structural glue 14 is improved; chamfers 123 are provided at the ends of the inner tube 121 and the outer tube 122 to facilitate the docking guidance. In addition, a step 1221 is disposed inside the outer tube 122 to abut against the end of the inner tube 121, so as to prevent the structural adhesive 14 from overflowing into the heat dissipation cavity.

As shown in fig. 3, in one embodiment, a partition 1312 is disposed in the housing 11 for dividing the heat dissipation chamber into two chambers; each partition 1312 is provided with a through hole at the position of the interface 12 for communicating the cavities; the fin assembly 13 includes two sets of fin units 131, and each fin unit 131 is located in each cavity. As shown in fig. 2 and 3, the two cavities are arranged in a left-right manner; as shown in fig. 1, the two cavities are arranged vertically, the corresponding cooling medium can enter at one side of each cavity, independently pass through each cavity, and join at the other side of each cavity, and the specific flow direction of the cooling medium can be seen in a dotted line with an arrow as shown in fig. 1 (in fig. 1, only the flow direction of the cooling medium in the uppermost and lowermost heat dissipation modules 1 is shown, and the flow direction of the cooling medium in the middle heat dissipation module 1 is the same as that of the cooling medium, and is not shown), that is, each cavity in each heat dissipation cavity serves as an independent flow channel, thereby further improving the heat exchange efficiency. Of course, in other embodiments, a plurality of partition plates 1312 may be disposed to form three, four or more cavities, so as to further improve the heat exchange efficiency.

As shown in fig. 4, each fin unit 131 further includes two staggered-tooth fins 1311, that is, the two fins 1311 adopt a staggered-tooth structure, so as to increase a fluid contact area and improve heat dissipation efficiency. Of course, in other embodiments, three, four, or more fins 1311 may be used.

As shown in fig. 1 and 2, in a specific embodiment, the shell 11 is formed by enclosing two core plates 111, specifically by brazing welding. In each heat dissipation module 1 that stacks in proper order, the outside of one of them heat dissipation module 1 that is located the outermost side is equipped with inlet and liquid outlet, and it has feed liquor pipe 2 to braze on the inlet, and the liquid outlet has brazed drain pipe 3.

In an embodiment, a heat conducting adhesive (not shown) is disposed between each housing 11 and the power module 4, so as to improve the heat conducting efficiency and further improve the heat dissipation effect.

During manufacturing, the core plate 111, the partition plates 1312, the fin assembly 13, the liquid inlet pipe 2, the liquid outlet pipe 3 and the like are integrally formed in a vacuum brazing furnace or a gas shielded brazing furnace. And assembling after molding, coating structural adhesive 14 on the surface of the inner pipe 121, butting the structural adhesive with the outer pipe 122, fastening and fixing the structural adhesive by using a clamp, and removing the clamp after the structural adhesive is completely cured.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.

Claims

1. The double-sided liquid cooling radiator is characterized by comprising a plurality of radiating modules (1), wherein each radiating module (1) comprises a shell (11) with a radiating cavity, a fin assembly (13) is arranged in each radiating cavity, and an interface (12) is arranged on each shell (11); the heat dissipation modules (1) are sequentially stacked, and adjacent heat dissipation modules (1) are butted through the interfaces (12), so that the heat dissipation cavities are sequentially communicated to form a cooling medium circulation channel; an installation space for clamping a component to be cooled is formed between the shells (11) of the adjacent heat dissipation modules (1); the interfaces (12) are in clearance fit and are sealed and fixed by coating structural adhesive (14).

2. The dual-sided liquid-cooled heat sink of claim 1, wherein the interface (12) on one side of one of the two adjacent housings (11) is an inner tube (121), and the interface (12) on one side of the other housing (11) is an outer tube (122), and the inner tube (121) is inserted into the outer tube (122) to form a clearance fit.

3. The double-sided liquid-cooled heat sink as claimed in claim 2, wherein the outer wall of the inner tube (121) is provided with a glue storage groove (1211).

4. A dual sided liquid cooled heat sink as claimed in claim 2, wherein the inner tube (121) is chamfered (123) at its end to facilitate guidance in abutting engagement with the outer tube (122).

5. A dual sided liquid cooled heat sink as claimed in claim 2, wherein the outer tube (122) is chamfered (123) at its end to facilitate guidance in abutting engagement with the inner tube (121).

6. A dual sided liquid cooled heat sink as claimed in claim 2 or claim 3, wherein the outer tube (122) is internally stepped (1221) to abut the end of the inner tube (121).

7. A dual sided liquid cooled heat sink according to any of claims 1-3, wherein the housing (11) has one or more parallel partitions (1312) therein for dividing the heat sink chamber into a plurality of chambers; through holes are formed in the positions, located on the interfaces (12), of the partition plates (1312) and used for communicating the cavities; the fin assembly (13) comprises more than one group of fin units (131), and each fin unit (131) is respectively positioned in each cavity.

8. The dual-sided liquid-cooled heat sink of claim 7, wherein each fin unit (131) includes two staggered fins (1311).

9. A two-sided liquid-cooled heat sink according to any of claims 1-3, wherein the housing (11) is enclosed by two core plates (111).

10. A two-sided liquid-cooled heat sink according to any one of claims 1-3, wherein the heat dissipating modules (1) stacked in sequence have a liquid inlet and a liquid outlet on the outside of one of the heat dissipating modules (1) located on the outermost side.