Phase change radiator

Abstract

The invention relates to a phase change radiator which comprises a base, the width direction and the length direction which are perpendicular to each other are limited in the extending plane of the base, the base is provided with a storage cavity, and a phase change medium is stored in the storage cavity; the heat dissipation tooth pieces are supported on the top of the base, the heat dissipation tooth pieces are arranged at equal intervals in the width direction, and flow channels are formed in the heat dissipation tooth pieces; the heat dissipation tooth pieces comprise first tooth pieces and second tooth pieces which are arranged at intervals in the width direction, and connecting parts and communicating parts which are connected to the bottoms of the first tooth pieces and the bottoms of the second tooth pieces, the communicating parts communicate the storage cavities with the flow channels, and the first tooth pieces and the second tooth pieces extend in the length direction and the height direction perpendicular to the extension plane of the base; the communicating part comprises a first communicating part communicating with the storage cavity and a second communicating part connected between the first communicating part and the flow channel, and the first communicating part is arranged on the second communicating part in a bias mode in the length direction.

Description

Technical Field

[0001] The present application relates to the technical field of heat dissipation equipment, and in particular to a phase change heat sink. Background Art

[0002] A phase change heat sink usually includes a base and a plurality of phase change teeth fixed on the base. There are many connection ports between the phase change teeth and the base, and the teeth are connected to the internal channels of the base. Once a leakage occurs, this area of ​​the heat sink will fail, so most of them have extremely high requirements for welding reliability.

[0003] However, in practical applications, Figure 1 As shown in the figure, the bulge of the connecting substrate hole at the bottom of the U-shaped blowing tooth and the U-shaped bending pipeline connecting the tooth pieces on both sides are in the same vertical section. The bending part of the U-shaped blowing tooth in the enlarged view is prone to buckling and collapse, thereby reducing the flow cross-sectional area. In addition, during bending, due to the cavity in the tooth piece, it is impossible to support the fillet of the fitting mold, resulting in the transition fillet of the welding surface being larger than the design value and uncontrollable, thereby reducing the welding width and reducing the reliability of the weld. Summary of the invention

[0004] An embodiment of the present application provides a phase change heat sink, which separates the connecting part between the heat sink and the base into two parts offset from each other, so that the connecting part between the heat sink and the base and the bent part of the heat sink itself are separated from each other, thereby avoiding the problem of reduced solder joint reliability due to the bending structure of the heat sink.

[0005] In one embodiment of the present application, a phase change heat sink is provided, comprising: A base, defining a width direction and a length direction perpendicular to each other in an extension plane of the base, the base having a storage cavity, and the storage cavity storing a phase change medium; Heat dissipation fins, the heat dissipation fins are supported on the top of the base, the heat dissipation fins are arranged at equal intervals along the width direction, and the heat dissipation fins have flow channels therein; The heat dissipation tooth plate includes: a first tooth plate and a second tooth plate arranged at intervals along the width direction, a connecting portion and a connecting portion connected to the bottom of the first tooth plate and the second tooth plate, the connecting portion connects the storage cavity and the flow channel, and the first tooth plate and the second tooth plate extend along the length direction and a height direction perpendicular to the extension plane of the base; The communication portion includes a first communication portion communicating with the storage chamber, and a second communication portion connected between the first communication portion and the flow channel, wherein the first communication portion is offset from the second communication portion in the length direction.

[0006] In one embodiment, the heat dissipation fins are fixedly connected to the top of the base via the first connecting portion and the connecting portion.

[0007] In one embodiment, the communicating portion and the connecting portion are isolated from each other.

[0008] In one embodiment, the top of the base has an opening communicating with the storage cavity. The first connecting portion includes a bottom wall and an arc-shaped top wall enclosed with the bottom wall to form an internal cavity, the center of the bottom wall has a central hole connected to the opening, and the diameter of the bottom wall is larger than the diameter of the central hole; The first connecting portion is fixedly connected to the top of the base via the bottom wall.

[0009] In one embodiment, the communication portion includes a third communication portion connected between the first communication portion and the second communication portion, The third communication portion extends along the length direction and passes through the arc-shaped top wall to communicate with the storage cavity via the internal cavity.

[0010] In one embodiment, the second communication portion includes a pair of arc-shaped arms respectively communicating with the flow channels of the first tooth plate and the second tooth plate.

[0011] In one embodiment, the radius of the arc-shaped arm is greater than the radius of the connection between the connecting portion and the first tooth piece and the second tooth piece.

[0012] In one embodiment, the radius of the arc-shaped arm is greater than 10 mm.

[0013] In one embodiment, the flow channel is distributed in the first tooth plate and the second tooth plate, and the flow channel of the first tooth plate is connected with the flow channel of the second tooth plate only via the second communication portion.

[0014] In one embodiment, the connecting portion is connected to one end of the bottom of the first tooth piece and the second tooth piece in the length direction.

[0015] In this example, the connecting part between the heat sink and the base is separated into two parts offset from each other, so that the connecting part between the heat sink and the base is separated from the bent part of the heat sink itself. The connecting part will not be affected by the bending of the bent part, thereby expanding the connecting area of ​​the connecting part to avoid the problem of reduced reliability of the solder joint due to the bending structure of the heat sink; and the bending radius of the bent part will not be affected by the connecting part, thereby avoiding the problem of buckling and collapse by increasing the bending radius of the bent part. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following drawings are only used to illustrate and explain the present application, and do not limit the scope of the present application.

[0017] Figure 1 It is a structural schematic diagram of an existing gear fin radiator.

[0018] Figure 2 Schematic diagram of the structure of the phase change heat sink in the embodiment of the present application.

[0019] Figure 3 and Figure 4 It is a schematic diagram of the structure of the connecting part in the embodiment of the present application.

[0020] Figure 5 It is a cross-sectional view of the heat dissipation tooth plate in the embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to have a clearer understanding of the technical features, purposes and effects of the invention, the specific embodiments of the invention are now described with reference to the accompanying drawings, in which the same reference numerals represent the same parts.

[0022] In this document, “exemplary” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “exemplary” should not be interpreted as a more preferred or more advantageous technical solution.

[0023] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked.

[0024] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0025] In this article, "first", "second", etc. are only used to distinguish each other, and do not indicate the importance and order, or the premise of each other's existence.

[0026] In this article, "equal", "same" and the like are not strictly limited in the mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use. Unless otherwise specified, the numerical ranges herein include not only the entire range within its two endpoints, but also several sub-ranges contained therein.

[0027] An embodiment of the present application provides a phase change heat sink, which separates the connecting part between the heat sink and the base into two parts offset from each other, so that the connecting part between the heat sink and the base and the bent part of the heat sink itself are separated from each other, thereby avoiding the problem of reduced solder joint reliability due to the bending structure of the heat sink.

[0028] Example embodiments will now be described more fully with reference to the accompanying drawings.

[0029] like Figures 2 to 5 As shown, one embodiment of the present application provides a phase change heat sink, comprising: A base 1 defines a width direction W and a length direction L perpendicular to each other in an extension plane of the base 1, and the base 1 has a storage cavity, in which a phase change medium is stored; Heat dissipation fins 2, the heat dissipation fins 2 are supported on the top of the base 1, the heat dissipation fins 2 are arranged at equal intervals along the width direction W, and the heat dissipation fins 2 have flow channels; The heat dissipation tooth plate 2 includes: a first tooth plate 11 and a second tooth plate 12 arranged at intervals along the width direction W, a connecting portion 13 and a connecting portion 14 connected to the bottom of the first tooth plate 11 and the second tooth plate 12, the connecting portion 14 connects the storage cavity and the flow channel, and the first tooth plate 11 and the second tooth plate 12 extend along the length direction L and the height direction H perpendicular to the extension plane of the base 1; The communication portion 14 includes a first communication portion 141 communicating with the storage chamber, and a second communication portion 142 connected between the first communication portion 141 and the flow channel, wherein the first communication portion 141 is offset from the second communication portion 142 in the length direction L.

[0030] The heat dissipation fins 2 include a first fin 11 and a second fin 12 which are arranged in parallel, and the first fin 11 and the second fin 12 have flow channels for the phase change medium to flow. The bottoms of the first fin 11 and the second fin 12 are connected by a connecting portion 13 to form a U-shaped structure. The connecting portion 13 is perpendicular to the first fin 11 and the second fin 12. If a cavity connected to the flow channel is provided in the connecting portion 13, buckling and collapse phenomena are likely to occur. Therefore, in this example, the connecting portion 13 is only used for structural support, that is, connecting the first fin 11 and the second fin 12, and supporting the heat dissipation fins 2 on the base 1, but is not used to provide a cavity connected to the flow channel.

[0031] In this example, the connecting portion 14 is used to provide a connecting cavity, wherein the connecting portion 14 includes a first connecting portion 141 connected to the storage cavity, and a second connecting portion 142 connected between the first connecting portion 141 and the flow channel. The storage cavity is located in the base 1, and the extension plane of the base 1 can be regarded as a horizontal direction, for example, while the flow channel is located in the first tooth plate 11 and the second tooth plate 12, and the extension direction of the first tooth plate 11 and the second tooth plate 12 can be regarded as a vertical direction, for example. In order to be suitable for the connection between two components with different extension directions, the first connecting portion 141 and the second connecting portion 142 in the connecting portion 14 in this example are offset in the length direction L, so that the first connecting portion 141 and the second connecting portion 142 can be provided in different shapes and set to different extension directions to provide stable support and reliable connection structure respectively.

[0032] In the existing radiator, the connection part is used to provide both structural support and connecting structure. In order to provide the connection, it is realized as a hollow structure. The hollow structure cannot provide a stable structural support, so it is easy to cause the problem of buckling and collapse.

[0033] In this example, the structural support and the connecting structure are separated, which can not only expand the area of ​​the supporting structure, but also eliminate the problem of buckling collapse by setting the connecting structure in the form of a non-right-angle corner.

[0034] The heat dissipation fins 2 are fixedly connected to the top of the base 1 via the first connecting portion 141 and the connecting portion 13 .

[0035] Since the first connecting portion 141 is connected to the storage cavity, the first connecting portion 141 is fixedly connected to the top of the base 1 to ensure the connection with the storage cavity. Similarly, the connecting portion 13 is also fixedly connected to the top of the base 1 to provide stable support for the heat dissipation fins 2.

[0036] In the communication portion 14 , the first communication portion 141 provides structural support, while the second communication portion 142 only provides a communication structure.

[0037] In one embodiment, the connecting portion 14 and the connecting portion 13 are isolated from each other. The connecting portion 14 is connected to one end of the bottom of the first tooth piece 11 and the second tooth piece 12 in the length direction.

[0038] The connecting portion 14 and the connecting portion 13 are isolated from each other by an annular groove, so that the bending radius around the connecting portion can be eliminated, thereby increasing the welding area and improving the quality of the weld; at the same time, external forces such as falling balls and angle steel collisions on the tooth pieces will not be transmitted to the welds, avoiding the influence of uncontrollable environmental factors.

[0039] Specifically, the top of the base 1 has an opening connected to the storage cavity, the first connecting portion 141 includes a bottom wall 1411 and an arc-shaped top wall 1412 enclosed with the bottom wall 1411 to form an internal cavity, the center of the bottom wall 1411 has a center hole 1413 connected to the opening, and the diameter of the bottom wall 1411 is larger than the diameter of the center hole 1413; The first connecting portion 141 is fixedly connected to the top of the base 1 via the bottom wall 1411 .

[0040] In this example, the center of the bottom wall 1411 has a center hole 1413 that docks with the opening, and the bottom wall 1411 around the center hole 1413 is used to be fixedly connected to the top of the base 1. The periphery of the arc-shaped top wall 1412 is connected to the periphery of the bottom wall 1411, and the arched portion of the arc-shaped top wall 1412 is used to form an internal cavity, which is connected to the storage cavity via the center hole 1413.

[0041] The diameter of the center hole 1413 corresponds to the opening of the base 1. The entire area of ​​the bottom wall 1411 except the center hole 1413 can be used for welding connection with the base 1, and the diameter of the bottom wall 1411 is adjustable. By increasing the diameter of the bottom wall 1411, the connection area between the first connecting part 141 and the base 1 can be expanded, thereby improving the connection stability between the heat dissipation teeth 2 and the base 1, and increasing the quality of the soldering point by increasing the soldering area.

[0042] The connecting portion 14 includes a third connecting portion 143 connected between the first connecting portion 141 and the second connecting portion 142 . The third connecting portion 143 extends along the length direction L and passes through the arc-shaped top wall 1412 to communicate with the storage cavity via the internal cavity.

[0043] The second communication portion 142 is used to communicate with the flow channel in the heat dissipation fin 2 . Since the second communication portion 142 involves a change in direction, the second communication portion 142 is isolated from the first communication portion 141 via the third communication portion 143 .

[0044] The phase change medium in the base 1 enters the first connecting portion 141 along the vertical direction and then propagates in the horizontal direction. The phase change medium in the connecting portion 14 needs to change from the horizontal direction to the vertical direction when entering the heat dissipation fins. Therefore, the first connecting portion 141 is used to guide the phase change medium in a direction perpendicular to the base 1 (i.e., the extension direction of the heat dissipation fins 2), and the second circulation portion 142 is used to guide the phase change medium from the horizontal direction to the vertical direction.

[0045] Specifically, the second communication portion 142 includes a pair of arc-shaped arms 1421 respectively communicating with the flow channels of the first tooth piece 11 and the second tooth piece 12 .

[0046] In conventional settings, the transition between the heat dissipation fins and the connecting parts is mostly achieved by chamfering. However, it can be imagined that the radius of the cavity at the bend must be smaller than the gap at the plane, which not only hinders the fluidity of the phase change medium, but also easily causes the problem of buckling and collapse.

[0047] In this example, the second connecting portion 142 is formed as a pair of arc-shaped arms 1421, and is respectively connected to the connecting channels in the first tooth piece 11 and the second tooth piece 12. In each arc-shaped arm 1421, one end thereof can be formed in a horizontal direction to be connected to the third connecting portion 143, and the other end can be formed in a vertical direction to be connected to the first tooth piece 11 or the second tooth piece 12. The middle part of the two ends transitions in an arc shape, which can ensure that the size of the cavity in the second connecting portion 142 is not affected by the bending portion.

[0048] Even after designing a U-shaped arc arm 1421 and adding an annular groove, the connecting part will still have a cavity bending. At this time, we can independently increase the bending radius of the arc arm 1421 to further avoid the probability of buckling and collapse. Of course, we can also use a secondary inflation tooth plate method to correct it.

[0049] The radius of the arc-shaped arm 1421 is greater than the radius of the connection between the connecting portion 13 and the first tooth piece 11 and the second tooth piece 12 .

[0050] In a specific example, the radius of the arc-shaped arm 1421 is greater than 10 mm.

[0051] The second connecting portion 142 is independent of the connecting portion 13 and the first connecting portion 141 , so the radius of the arc-shaped arm 1421 can be adjusted independently to eliminate the influence of the bending fillet on the internal cavity of the connecting portion.

[0052] The flow channel is distributed in the first tooth plate 11 and the second tooth plate 12 , and the flow channel of the first tooth plate 11 is connected with the flow channel of the second tooth plate 12 only via the second connecting portion 142 .

[0053] In order to increase the heat dissipation area, the flow channels in the first tooth plate 11 and the second tooth plate 12 are arranged in a winding manner by repeated bending. Specifically, the flow channels can be arranged in a manner of extending along the vertical direction and bending along the length direction.

[0054] The phase change medium in the base 1 changes from liquid to gas when the temperature increases, and expands in volume, so as to enter the flow channel in the first tooth plate 11 and the second tooth plate 12 from the opening of the base 1 through the connecting portion 13, so as to exchange heat with the external air through the surface of the heat dissipation tooth plate. After the phase change medium dissipates heat, it is restored from gas to liquid, and its volume shrinks, and it flows back into the base 1 under the action of gravity.

[0055] An embodiment of the present application provides a phase change heat sink, which separates the connecting part between the heat sink fin and the base into two parts offset from each other, so that the connecting part between the heat sink fin and the base and the bent part of the heat sink fin itself are separated from each other. The connecting part is not affected by the bending of the bent part, thereby expanding the connecting area of ​​the connecting part to avoid the problem of reduced solder joint reliability due to the bending structure of the heat sink fin; and the bending radius of the bent part is not affected by the connecting part, thereby avoiding the problem of buckling and collapse by increasing the bending radius of the bent part.

[0056] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A phase change heat sink, characterized in that: include: A base (1), defining a width direction (W) and a length direction (L) perpendicular to each other in an extension plane of the base (1), the base (1) having a storage cavity, wherein a phase change medium is stored in the storage cavity; Heat dissipation fins (2), the heat dissipation fins (2) being supported on the top of the base (1), the heat dissipation fins (2) being arranged at equal intervals along the width direction (W), and the heat dissipation fins (2) having flow channels therein; The heat dissipation tooth plate (2) comprises: a first tooth plate (11) and a second tooth plate (12) arranged at intervals along the width direction (W), a connecting portion (13) and a connecting portion (14) connected to the bottom of the first tooth plate (11) and the second tooth plate (12), the connecting portion (14) connecting the storage cavity and the flow channel, and the first tooth plate (11) and the second tooth plate (12) extending along the length direction (L) and a height direction (H) perpendicular to the extension plane of the base (1); The communication portion (14) comprises a first communication portion (141) communicating with the storage chamber, and a second communication portion (142) connected between the first communication portion (141) and the flow channel, wherein the first communication portion (141) is offset from the second communication portion (142) in the length direction (L).

2. The phase change heat sink according to claim 1, characterized in that: The heat dissipation fins (2) are fixedly connected to the top of the base (1) via the first connecting portion (141) and the connecting portion (13).

3. The phase change heat sink according to claim 2, characterized in that: The communicating portion (14) and the connecting portion (13) are isolated from each other.

4. The phase change heat sink according to claim 1, characterized in that: The top of the base (1) has an opening communicating with the storage cavity. The first connecting portion (141) comprises a bottom wall (1411) and an arc-shaped top wall (1412) enclosed with the bottom wall (1411) to form an internal cavity, the center of the bottom wall (1411) has a center hole (1413) connected to the opening, and the diameter of the bottom wall (1411) is greater than the diameter of the center hole (1413); The first connecting portion (141) is fixedly connected to the top of the base (1) via the bottom wall (1411).

5. The phase change heat sink according to claim 4, characterized in that: The connecting portion (14) comprises a third connecting portion (143) connected between the first connecting portion (141) and the second connecting portion (142), The third communication portion (143) extends along the length direction (L) and passes through the arc-shaped top wall (1412) so as to be connected with the storage cavity via the internal cavity.

6. The phase change heat sink according to claim 4, characterized in that: The second communication portion (142) comprises a pair of arc-shaped arms (1421) respectively connected to the flow channels of the first tooth plate (11) and the second tooth plate (12).

7. The phase change heat sink according to claim 6, characterized in that: The radius of the arc-shaped arm (1421) is greater than the radius of the connection between the connecting portion (13) and the first tooth piece (11) and the second tooth piece (12).

8. The phase change heat sink according to claim 6, characterized in that: The radius of the arc-shaped arm (1421) is greater than 10 mm.

9. The phase change heat sink according to claim 1, characterized in that: The flow channel is distributed in the first tooth plate (11) and the second tooth plate (12), and the flow channel of the first tooth plate (11) is connected with the flow channel of the second tooth plate (12) only via the second connecting portion (142).

10. The phase change heat sink according to claim 1, characterized in that: The connecting portion (14) is connected to one end of the bottom of the first tooth piece (11) and the second tooth piece (12) in the length direction.

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