LIQUID COOLING DEVICE FOR THE ARRANGEMENT OF A POWER SEMICONDUCTOR DEVICE

Abstract

A liquid cooling device with a main body has a planar surface for the arrangement of a power semiconductor device. This main body has a first end face and a second end face opposite said first one, and a plurality of tubular cooling recesses extending from the first to the second end face. A first swirling element arranged in an associated cooling recess, wherein the swirling element has an operative section arranged within the associated cooling recess and a locking section, wherein the locking section interacts with a locking abutment and/or with a further swirling element, and therefore prevents rotation of the operative section in the associated recess.

Claims

1-13. (canceled)

14. A liquid cooling device (1), for the arrangement of a power semiconductor device in an assembly, comprising: a main body (2) having a planar surface (20) for said assembly with said power semiconductor device; the main body (2) has a first end face (22) and a second end face opposite the first end face; a plurality of tubular cooling recesses (3) extending from the first end face (22) to the second end face; a first turbulence body (4) arranged in a respective associated cooling recess (3), the first turbulence body (4) has an active section (42) arranged inside the associated cooling recess (3) and a locking section (44); and whereby the locking section (44) interacts with one of a locking counter-bearing (24,34) and with a further turbulence body (5) and thus preventing rotation of the active section (42) in the associated cooling recess (3).

15. The liquid cooling device (1), according to claim 14, wherein: the locking section (44) is one of as a first straight section or an angled pin section (440) arranged in a locking recess (240, 340), which forms the locking abutment (24, 34).

16. The liquid cooling device (1), according to claim 15, wherein: the locking recess (240) is formed on the first end face (22) of the main body (2) or in a opposite side (62) of a first collecting body (6); and wherein the first collecting body (6) is arranged with its opposite side (62) on the first end face (22).

17. The liquid cooling device (1), according to claim 16, wherein: the locking recess (240) has a section (242), which extends parallel to the first end face (22).

18. The liquid cooling device (1), according to claim 15, wherein: the locking recess (340) is formed as a recess shaped as an additional deepening recess in the associated cooling recess (3).

19. The liquid cooling device (1), according to claim 18, wherein: the additional deepening recess is formed only in a partial section of the cooling recess (3).

20. The liquid cooling device (1), according to claim 14, wherein: the respective locking sections (44) of the first and further turbulence bodies (4, 5), are arranged in respective adjacent cooling recesses; and a second connecting pin section (446) that connects both turbulence bodies (4, 5) and is one of a straight section or a curved section.

21. The liquid cooling device (1), according to claim 14, wherein: the plurality of cooling recesses (3) are arrayed parallel to the planar surface (20).

22. The liquid cooling device (1), according to claim 14, wherein: the cooling recesses (3) have a substantially round cross-section having one of a smooth surface, a surface with a plurality of studs extending radially to the center point, and a radial serrated profile (36).

23. The liquid cooling device (1), according to claim 14, wherein: the active section (42) of the turbulence body (4) has a helical shape.

24. The liquid cooling device (1), according to claim 23, wherein: a center axis (400) of the turbulence body (4) coincides with a center axis (300) of the associated cooling recess (3).

25. The liquid cooling device (1), according to claim 24, wherein: each adjacent alternating turbulence body (4) has active sections (42) with a different direction of rotation of the helix.

26. The liquid cooling device (1), according to claim 24, wherein: the outer diameter of the active section (42) corresponds to the free diameter of the cooling recess (3).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIGS. 1 and 2 show a first configuration of a liquid cooling device according to the invention in a three-dimensional view.

[0020] FIG. 3 shows the two swirling elements belonging to the first liquid cooling device.

[0021] FIG. 4 shows two views of a detail of a second configuration of a liquid cooling device according to the invention.

[0022] FIG. 5 shows two views of a detail of a third configuration of a liquid cooling device according to the invention,

[0023] FIG. 6 shows a modified refinement of this third configuration.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] FIGS. 1 and 2 show a first configuration of a liquid cooling device 1 according to the invention in a three-dimensional view. This liquid cooling device 1 has a planar surface 20 for the arrangement of a plurality of power semiconductor devices, for example half-bridge power semiconductor modules. This planar surface 20 forms a main surface of a main body 2 of the liquid cooling device 1. At right angles to this planar surface 20, here a first end face 22 and a second end face opposite and parallel thereto are arranged on the first narrow side of the main body 2.

[0025] The main body 20 also has a plurality of tubular cooling recesses 3. These extend from the first to the second end face 22 and are aligned parallel to the planar surface 20. The outline of the cross section of these cooling recesses 3 is round, having a radial serration 36 in this configuration.

[0026] As already known in principle from the prior art, a first swirling element 4 is arranged in each of the cooling recesses 3, having an operative section 42 which is helical. The central axis 400 of the first swirling element 4 here coincides with the central axis 300 of the associated cooling recess 3. At the same time, the diameter of the operative section 42 is chosen such that it corresponds to the clear diameter of the cooling recess 3. The operative section 42 therefore rests radially on the ends of the serrations that protrude into the inner region of the cooling recess 3.

[0027] The first swirling element 4 and, in particular, its operative section 42 are formed from a metallic material which, ideally, is the same as that of the main body 2 of the liquid cooling device 1. In this configuration, the main body 2 consists of aluminum, and the first swirling element 4 likewise consists of aluminum or an aluminum alloy with at least 60% aluminum.

[0028] The material of the helical operative section 42 here has a round, oval or preferably rectangular cross section. The operative section 42 is used to swirl cooling liquid flowing through the cooling recess 3, i.e., to prevent laminar flow, as a result of which the transmission of heat from the main body 2 to the cooling liquid is improved.

[0029] In the practical application, as a result of requirements related to production, oscillations or further critical rotations of the operative section 42 in the cooling recess 3 result. According to the invention, these are prevented by the preferably one-piece further development of the first swirling element 4, which, in addition to the operative section 42, is supplemented by a locking section 44, preferably already formed during the production of the first swirling element 4.

[0030] In this first configuration, the locking section 44 is formed by a connecting pin section 446 between a first swirling element 4 and a further swirling element 5. The two swirling elements 4,5 thus cooperate via the locking section 44 and prevent rotation of the respective operative section 42 in the associated cooling recess 3. In addition, here the operative section 42 of the swirling element 4 has a helical course with a first direction of rotation of the helix, rotating to the left here when viewed in the negative z direction, while the operative section of the further swirling element 5 has a helical course with a second direction of rotation of the helix, rotating to the right here when viewed in the negative z direction.

[0031] Also illustrated are two collecting bodies 6,7 of the liquid cooling device 1, which each have a cooling liquid inlet or outlet and a collecting recess. For example, cooling liquid flows through the inlet of the first collecting body 6 into its collecting recess and from the latter into the respective cooling recesses 3. The cooling liquid emerges from the respective cooling recesses 3 into the collecting recess of the second collecting body 7 and from there flows through the cooling liquid outlet out of the liquid cooling device 1 again. For this purpose, the first collecting body 6 is arranged with its opposite side 62 on the first end face 22 of the main body 2, and the second collecting body 7 is arranged with its opposite side 62 on the second end face of the main body 2.

[0032] FIG. 3 shows the two swirling elements 4,5 belonging to the liquid cooling device 1 and their connecting pin section 446.

[0033] FIG. 4 shows two views of a detail of a second configuration of a liquid cooling device 1 according to the invention, wherein in each case a detail of the main body 2 and a first swirling element 4 arranged in a cooling recess 3 with a circular cross section is illustrated.

[0034] Here, starting tangentially from the cooling recess 3, a trench-like recess which, here, forms a locking recess 240 as a configuration of the locking abutment 24, is arranged in the surface of the end face 22 and ends in an additional deepening of the trench.

[0035] The operative section 42 of the swirling element 4 is adjoined in one piece and tangentially relative to the central axis by the locking section 44, which is L-shaped here. Here, the first leg, a section 242, of the “L” extends parallel to the end face, and the second leg of the “L” extends at right angles thereto and in the direction of the operative section 42, i.e., in the negative z direction here.

[0036] This locking section 44 of the swirling element 4, L-shaped here, is arranged in this locking recess 240, wherein the angled end of the locking section 44 is arranged in the additional deepening 244. The whole of the first swirling element 4 thus does not protrude out of the end face 22 of the main body 2 of the liquid cooling device 1, that is to say in the z direction.

[0037] As a result of the arrangement of the locking section 44 with the locking abutment 24, rotation of the operative section 42 in the associated cooling recess 3 is prevented.

[0038] FIG. 5 shows two views of a detail of a third configuration of a liquid cooling device 1 according to the invention, wherein, once more, in each case a detail of the main body 20 and a swirling element 4 arranged in a cooling recess 3 are illustrated.

[0039] The cooling recess 3 here once more has a basically circular cross section. However, an additional deepening recess, that is to say a trench, is arranged in this circular cross section, extends radially outwards and forms a locking recess 340 as a configuration of the locking abutment 34. A portion of this trench, starting from the first end face 22, reaches into the cooling recess 3.

[0040] The operative section 42 of the first swirling element 4 is adjoined in one piece and tangentially relative to the central axis by the locking section 44, which is L-shaped here. Here, the first leg of the “L” extends parallel to the end face 20, and the second leg of the “L” extends at right angles thereto and in the direction of the operative section 42, i.e., in the negative z direction here.

[0041] The locking section 44, more accurately its second leg, is arranged in the locking recess 340 and therefore in the cooling recess 3 itself. The whole of the first swirling element 4 thus does not protrude out of the end face 22 of the main body 2 of the liquid cooling device 1, that is to say in the z direction.

[0042] FIG. 6 shows a modified refinement of this third configuration. The cooling recess 3 here has a radial serration 36, in which one of the deepenings is more highly pronounced and thus simultaneously forms the locking recess 340.

LIST OF REFERENCE SYMBOLS

[0043] 1 Liquid cooling device [0044] 2 Main body [0045] 20 Planar surface [0046] 22 First end face [0047] 24 Locking abutment [0048] 240 Locking recess [0049] 242 Section of 240 [0050] 244 Additional deepening of 240 [0051] 3 Cooling recess [0052] 34 Locking abutment [0053] 36 Serration [0054] 300 Central axis [0055] 340 Locking recess [0056] 4 First swirling element [0057] 42 Operative section [0058] 44 Locking section [0059] 400 Central axis [0060] 440 Angled pin section [0061] 446 Connecting pin section [0062] 5 Further swirling element [0063] 6 First collecting body [0064] 62 Opposite side [0065] 7 Second collecting body.

[0066] Having described at least one of the preferred embodiments of the present invention with reference to the accompanying drawings, it will be apparent to those skills that the invention is not limited to those precise embodiments, and that various modifications and variations can be made in the presently disclosed system without departing from the scope or spirit of the invention. Thus, it is intended that the present disclosure cover modifications and variations of this disclosure provided they come within the scope of the appended claims and their equivalents.