Patent ID: 8061414

Claim:
A boil cooling method for cooling one of a surface of an object to be cooled and a surface of a heating member in close contact with the surface of the object to be cooled, the surface serving as a cooling surface, and the method comprising: forming a main flow channel for a cooling liquid integrally with the cooling surface, the cooling liquid flowing along the cooling surface in the main flow channel, and forming a sub-flow channel for the cooling liquid, wherein the sub-flow channel is overlapped and integrated with the main flow channel through a partition wall; arranging a plurality of nozzles penetrating the partition wall separating the sub-flow channel and the main flow channel and protruding into the main flow channel, wherein the plural nozzles are arranged in a flow channel direction of the main flow channel, and tip end parts of the individual nozzles are caused to be in the vicinity of or in contact with the cooling surface; and causing the cooling liquid to circulate to the main flow channel and the sub-flow channel, cooling the cooling surface with boiling of the cooling liquid flowing through the main flow channel, and at the same time, supplying the cooling liquid to the main flow channel from the sub-flow channel through each of the nozzles so as to exude in the vicinity of the cooling surface; wherein the cooling liquid is made to flow through the main flow channel in a first direction, and the cooling liquid is made to flow through the sub-flow channel in a second direction which is opposite to the first direction; wherein the cooling surface extends in a horizontal plane, and the cooling liquid is made to flow in the main flow channel in a horizontal direction along the cooling surface; wherein the main flow channel has separate inlet and outlet ports, and the sub-flow channel has separate inlet and outlet ports; and wherein the cooling liquid is forcibly made to flow in both the main flow channel and the sub-flow channel.