| 摘要 |
PURPOSE:To reduce pressure loss and to improve cooling efficiency, by winding a metallic rectangular pipe spirally from the center so as to shape it into a disk with a gap defined between adjacent pipe sections for providing a forward path for the cooling medium and interposing the disk between a pair of metallic plates so that a space surrounded by the adjacent pipe sections and the metallic plates provides a backward path. CONSTITUTION:A metallic rectangular pipe 10 having good heat conductivity is wound spirally from the center thereof such that a forward path 11 through which coolant 5 is refluxed is provided and that it forms a disk in which adjacent sections of the rectangular pipe 10 are spaced from each other by a gap. This spirally wound and disk-shaped rectangular pipe 10 is interposed between a pair of metallic plates 16 having good heat conductivity, so that the space surrounded by the adjacent sections of the rectangular pipe 10 and the metallic plates 16 provides a backward path 12. At least outermost section of the assembly is water welded 17 and lead members 9 are provided in connection with the forward and backward paths 11 and 12, respectively, for providing water supplying and exhausting orifices. Thereby, pressure loss can be reduced and a highly efficient cooling unit can be produced at a low cost.
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