Patent ID: 7661192

Claim:
A method of manufacturing a cooling unit that includes a cooling plate in which a cooling fluid flows, the cooling plate having a pair of tabular members arranged to be opposed to each other, and a cooling pipe, through which the cooling fluid flows, sandwiched between the tabular members, the manufacturing method comprising: forming grooves for housing the cooling pipe in respective opposed surfaces of the pair of tabular members, the grooves in the opposed surfaces being mirror images of each other the grooves being larger than a diameter of the cooling pipe and a gap being between the grooves and the cooling pipe; forming projections projecting to inner sides of the grooves by applying an external force or joining a predetermined member to the respective opposed surfaces of the pair of tabular members; and combining each of the pair of tabular members and the cooling pipe by housing the cooling pipe in the grooves and expanding the diameter of the cooling pipe.