Laminated core type heat sink
In a laminated core type heat sink in which a plate is formed by arranging a plurality of slits in parallel to a metal flat plate and by laminating the plate in large numbers, the thickness of a second plate positioned second in the lamination direction from an end lid to which a semiconductor is attached is made greater than thickness of a first plate other than the second plate.
1. A heat sink, comprising:
a laminated core comprising a plurality of discrete flat metal plates in a laminated configuration, each of the plates having a plurality of mutually parallel slits formed therethrough to define a plurality of mutually parallel longitudinal ribs and a plurality of mutually parallel transverse ribs, the transverse ribs linking respective adjacent ones of the longitudinal ribs, the longitudinal ribs and the transverse ribs forming the perimeters of the slits, and
a pair of lids each of which is laminated to a respective end one of the plates of the laminated core;
wherein the longitudinal ribs of each of the plates is in registry with the longitudinal ribs of all the others of the plates,
wherein the transverse ribs of some of the plates are offset from the transverse ribs of others of the plates,
wherein an exterior surface of at least one of the lids is configured to receive an object to be cooled,
wherein the laminated core is configured to circulate refrigerant in a longitudinal direction of the longitudinal ribs and into the slits,
wherein a first one of the plates abutting the lid having the exterior surface configured to receive the object to be cooled and a plurality of mutually adjacent ones of the plates next after a second of the plates in a direction of the lamination are of a same thickness, and
wherein the second plate is one of the discrete plates or is a plurality of the discrete plates laminated to one another in registry with one another, and the second plate is of greater thickness in the direction of lamination than the first plate and the plurality of mutually adjacent plates next after the second plate in the direction of lamination.
2. The heat sink according to claim 1 , wherein (thickness T 2 of the second plate)/(thickness T 1 of the first plate) is ≥1.2.
3. The heat sink according to claim 1 , wherein the second plate is a plurality of the discrete plates.
4. The heat sink according to claim 1 , wherein the second plate is one of the discrete plates.
5. The heat sink according to claim 1 , wherein each of the plates is framed by a respective frame which is integral with the plate and a manifold for circulating the refrigerant to and from the plates is integrally formed in opposed longitudinal sides of the frames, the manifold extending longitudinally parallel to the longitudinal ribs.
6. A heat sink, comprising:
a laminated core comprising a plurality of discrete flat metal plates in a laminated configuration, each of the plates having a plurality of mutually parallel slits formed therethrough to define a plurality of mutually parallel longitudinal ribs and a plurality of mutually parallel transverse ribs, the transverse ribs linking respective adjacent ones of the longitudinal ribs, the longitudinal ribs and the transverse ribs forming the perimeters of the slits, and
a pair of lids, at least one of the lids being concave, configured as a casing for the laminated core with the lids abutting faces of respective end ones of the plates; and
a manifold formed in the casing, the manifold having respective parts running in a longitudinal direction parallel to the longitudinal ribs at respective longitudinal sides of the plates and being configured to circulate refrigerant to and from the laminated core;
wherein the longitudinal ribs of each of the plates is in registry with the longitudinal ribs of all the other of the ribs,
wherein the transverse ribs of some of the plates are offset from the transverse ribs of other of the plates,
wherein an exterior surface of at least one of the lids is configured to receive an object to be cooled,
wherein the laminated core is configured to circulate refrigerant in a longitudinal direction of the longitudinal ribs and into the slits,
wherein a first one of the plates abutting the lid having the exterior surface configured to receive the object to be cooled and a plurality of mutually adjacent ones of the plates next after a second of the plates in a direction of the lamination are of a same thickness, and
wherein the second plate is one of the discrete plates or is a plurality of the discrete plates laminated to one another in registry with one another, and the second plate is of greater thickness in the direction of lamination than the first plate and the plurality of mutually adjacent plates next after the second plate in the direction of lamination.
7. The heat sink according to claim 6 , wherein (thickness T 2 of the second plate)/(thickness T 1 of the first plate) is ≥1.2.
8. The heat sink according to claim 6 , wherein the second plate is a plurality of the discrete plates.
9. The heat sink according to claim 6 , wherein the second plate is one of the discrete plates.