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JP-7856556-B2 - Cold Plate

JP7856556B2JP 7856556 B2JP7856556 B2JP 7856556B2JP-7856556-B2

Inventors

  • 松田 将宗
  • 川原 洋司

Assignees

  • 株式会社フジクラ

Dates

Publication Date
20260511
Application Date
20221219

Claims (6)

  1. It is a cold plate, The housing comprises a metal base plate having a base portion and a resin cover having an outer wall portion joined to the base portion, The housing has an internal space enclosed by the base and the outer wall, an inlet for refrigerant to flow into the internal space and communicating with the internal space, and an outlet for refrigerant to flow out of the internal space. The base plate has a heat exchange section located in the internal space that transfers heat received from the heating element to the refrigerant. The resin cover has a low-temperature channel through which the refrigerant flows before it receives heat from the heat exchanger, located in the internal space, and a high-temperature channel through which the refrigerant flows after it has received heat from the heat exchanger, and which does not open to the low-temperature channel . In the thickness direction of the cold plate, the low-temperature channel and the high-temperature channel overlap. Cold plate.
  2. The resin cover has a partition wall that separates the low-temperature channel and the high-temperature channel. The partition wall is joined to the base plate. The cold plate according to claim 1.
  3. The partition wall is joined to the heat exchange section. The cold plate according to claim 2.
  4. The portion where the low-temperature channel opens to the heat exchange section and the portion where the high-temperature channel opens to the heat exchange section are located at different positions in a second direction that intersects the first direction in which the high-temperature channel extends. The heat exchange section has a plurality of fins extending in the second direction. A cold plate according to any one of claims 1 to 3.
  5. The outer wall portion, the low-temperature channel, and the high-temperature channel are formed integrally. A cold plate according to any one of claims 1 to 3.
  6. The high-temperature channel has a shape that gradually widens as it approaches the outflow hole. A cold plate according to any one of claims 1 to 3.

Description

This invention relates to a cold plate. Conventionally, metal cold plates that cool heat-generating elements using a refrigerant flowing through the internal space of a housing are known (see, for example, Patent Document 1). International Publication No. 2020/174593 This is a perspective view showing a cold plate according to the first embodiment of the present invention.This is an exploded view showing a cold plate according to the first embodiment of the present invention.This is a cross-sectional view along the line III-III shown in Figure 1.This is a cross-sectional view along the line IV-IV shown in Figure 1.This figure shows an enlarged view of region A shown in Figure 3.This is a partially broken diagram showing a cold plate according to the first embodiment of the present invention.This is an exploded view showing a cold plate according to a second embodiment of the present invention.This is a perspective view showing a resin cover according to a second embodiment of the present invention.This is a cross-sectional view including the entrance recess along the IX-IX line shown in Figure 7.This is a cross-sectional view including the exit recess along the line X-X shown in Figure 7.This is a perspective view showing a resin cover according to a modified example of the second embodiment of the present invention. (First Embodiment) Hereinafter, a cold plate according to the first embodiment of the present invention will be described with reference to the drawings. As shown in Figures 1 and 2, the cold plate 100 according to this embodiment comprises a flat housing 1 having a metal base plate 10 and a resin cover 20. Furthermore, as shown in Figures 2 to 4, the housing 1 has an internal space S, an inlet H1 through which refrigerant flows in and communicates with the internal space S, and an outlet H2 through which refrigerant flows out and communicates with the internal space S. <Direction definition> In this embodiment, the thickness direction of the cold plate 100 is simply referred to as the thickness direction Z. The thickness direction Z is also the direction in which the base plate 10 and the resin cover 20 face each other. Viewing from the thickness direction Z is referred to as a plan view. One direction that intersects the thickness direction Z (for example, perpendicular) is referred to as the first direction X. A direction that intersects both the thickness direction Z and the first direction X (for example, perpendicular) is referred to as the second direction Y. The direction from the base plate 10 toward the resin cover 20 along the thickness direction Z is referred to as the +X direction or upward. The direction opposite to the +Z direction is referred to as the -Z direction or downward. One direction in the first direction X is referred to as the +X direction. The direction opposite to the +X direction is referred to as the -X direction. One direction in the second direction Y is referred to as the +Y direction. The direction opposite to the +Y direction is referred to as the -Y direction. Suitable materials for the base plate 10 include copper, copper alloys, aluminum, and aluminum alloys. As shown in Figures 2 to 4, the base plate 10 according to this embodiment has a plate-shaped base portion 11 and a heat exchange portion 12. As shown in Figures 3 and 4, the base 11 has a first surface 11a facing upward and a second surface 11b located opposite the first surface 11a and facing downward. The heat exchange section 12 is formed on the first surface 11a. The base 11 and the heat exchange section 12 may be formed integrally or as separate parts. A heating element or heat transfer member (not shown) may come into contact with the second surface 11b. As shown in Figures 2 to 4, the heat exchange section 12 according to this embodiment has a plurality of fins 13 extending in the second direction Y. Each fin 13 has a plate-like shape extending in the second direction Y and the thickness direction Z. Each fin 13 has an upper end surface 13a facing upward. The heat exchange section 12 has the role of transferring heat received from a heating element (not shown) to the refrigerant. Having a plurality of fins 13 in the heat exchange section 12 increases the contact area between the heat exchange section 12 and the refrigerant, improving heat conduction efficiency. As shown in Figure 2, a fitting groove 11c is formed on the first surface 11a of the base portion 11 according to this embodiment. In a plan view, the fitting groove 11c has an annular shape surrounding the heat exchange portion 12. A hydrophobic resin can be suitably used as the material for the resin cover 20. Examples of thermoplastic crystalline plastics that can constitute the resin cover 20 include polyphenylene sulfide (PPS), polyamide, polypropylene, polyethylene terephthalate, polyetheretherketone (PEEK), and polyacetal (POM). The thermal conductivity of the resin cover 20 is lower than that of the metal base plate 10. As shown