Cold plate
A cold plate includes a housing, which in turn includes a metal base plate and a resin cover. The metal base plate includes: a base part; and a heat exchange part that transfers heat absorbed from a heating element to a refrigerant. The resin cover includes an outer wall part joined to the base part. The housing has: an internal space, surrounded by the base part and the outer wall part, in which the heat exchange part is disposed; an inflow hole that communicates with the internal space and into which the refrigerant flows; and an outflow hole that communicates with the internal space and through which the refrigerant flows out.
1 . A cold plate comprising:
a housing comprising a metal base plate and a resin cover, wherein
the metal base plate comprises:
a base part; and
a heat exchange part that transfers heat absorbed from a heating element to a refrigerant, the resin cover comprises an outer wall part joined to the base part, the housing has:
an internal space, surrounded by the base part and the outer wall part, in which the heat exchange part is disposed;
an inflow hole that communicates with the internal space and into which the refrigerant flows; and
an outflow hole that communicates with the internal space and through which the refrigerant flows out,
the resin cover further comprises:
a low-temperature refrigerant flow path, disposed in the internal space, through which the refrigerant flows before absorbing heat from the heat exchange part; and
a high-temperature refrigerant flow path, disposed in the internal space, through which the refrigerant flows after absorbing heat from the heat exchange part,
the high-temperature refrigerant flow path is separated from the low-temperature refrigerant flow path, and
at least part of the low-temperature refrigerant flow path overlaps the high-temperature refrigerant flow path when viewed in a thickness direction of the cold plate.
2 . The cold plate according to claim 1 , wherein
the resin cover comprises a partition wall portion that:
separates the low-temperature refrigerant flow path and the high-temperature refrigerant flow path, and
is joined to the metal base plate.
3 . The cold plate according to claim 2 , wherein the partition wall portion is joined to the heat exchange part.
4 . The cold plate according to claim 1 , wherein
the low-temperature refrigerant flow path communicates with a first portion of the heat exchange part,
the high-temperature refrigerant flow path communicates with a second portion of the heat exchange part,
the high-temperature refrigerant flow path extends in a first direction,
a position of the first portion is different from a position of the second portion in a second direction intersecting the first direction, and
the heat exchange part comprises fins extending in the second direction.
5 . The cold plate according to claim 1 , wherein the outer wall part, the low-temperature refrigerant flow path, and the high-temperature refrigerant flow path are integrally formed.
6 . The cold plate according to claim 1 , wherein the high-temperature refrigerant flow path has a shape gradually broadening toward the outflow hole.
7 . The cold plate according to claim 1 , wherein the resin cover further comprises:
a top plate;
a partition wall that separates the low-temperature refrigerant flow path from the high-temperature refrigerant flow path; and
a support protrusion that fixes the partition wall with the top plate without separating the low-temperature refrigerant flow path from the high-temperature refrigerant flow path.
8 . A cold plate comprising:
a housing comprising a metal base plate and a resin cover, wherein
the metal base plate comprises:
a base part; and
a heat exchange part that transfers heat absorbed from a heating element to a refrigerant,
the resin cover comprises an outer wall part joined to the base part,
the housing has:
an internal space, surrounded by the base part and the outer wall part, in which the heat exchange part is disposed;
an inflow hole that communicates with the internal space and into which the refrigerant flows; and
an outflow hole that communicates with the internal space and through which the refrigerant flows out,
the resin cover further comprises:
a low-temperature refrigerant flow path, disposed in the internal space, through which the refrigerant flows before absorbing heat from the heat exchange part; and
a high-temperature refrigerant flow path, disposed in the internal space, through which the refrigerant flows after absorbing heat from the heat exchange part,
the high-temperature refrigerant flow path is separated from the low-temperature refrigerant flow path, and
the resin cover further comprises:
a top plate;
a partition wall that separates the low-temperature refrigerant flow path from the high-temperature refrigerant flow path; and
a support protrusion that fixes the partition wall with the top plate without separating the low-temperature refrigerant flow path from the high-temperature refrigerant flow path.
9 . A cold plate comprising:
a housing comprising a metal base plate and a resin cover, wherein
the metal base plate comprises:
a base part; and
a heat exchange part that transfers heat absorbed from a heating element to a refrigerant,
the resin cover comprises an outer wall part joined to the base part,
the housing has:
an internal space, surrounded by the base part and the outer wall part, in which the heat exchange part is disposed;
an inflow hole that communicates with the internal space and into which the refrigerant flows; and
an outflow hole that communicates with the internal space and through which the refrigerant flows out,
the resin cover further comprises:
a low-temperature refrigerant flow path, disposed in the internal space, through which the refrigerant flows before absorbing heat from the heat exchange part; and
a high-temperature refrigerant flow path, disposed in the internal space, through which the refrigerant flows after absorbing heat from the heat exchange part,
the high-temperature refrigerant flow path is separated from the low-temperature refrigerant flow path,
the high-temperature refrigerant flow path comprises a plurality of high-temperature refrigerant flow paths, and
each of the plurality of high-temperature refrigerant flow paths extends substantially straight and has a shape gradually broadening toward the outflow hole when viewed in a thickness direction of the cold plate.