| 摘要 |
PURPOSE:To promote the transfer of evaporation heat thereby to improve the heat transfer performance of the heat transfer pipe by superimposing a flat flowpath member provided with a plurality of wide slits forming a part of respective coolant flowpaths at portions corresponding to a plurality of narrow slits, on both surfaces of a flat flowpath member provided with narrow slits forming a part of the coolant flowpaths, and further integrally laminating outer flat wall members on said both surfaces. CONSTITUTION:A plurality of narrow slits 13 forming a part of coolant flowpaths are provided in parallel in a flowpath member 12. On both surfaces of the flowpath member 12, a flowpath member 14 provided with a plurality of wide slits 15 forming a part of coolant flowpaths at portions corresponding to narrow slits 13 is superimposed. The coolant flowpaths formed by slits 13 and 15 of respective flowpath members 12 and 14 assumes a flat I type, in which minute clearances are increased to four portions, a liquid coolant is held by the effect of the surface tension of the liquid coolant 19 and circulates, and the lower part of the flowpath assumes a jar shape section. Therefore, the hollow part of the flowpath promotes the generation of boiling nuclcus, and thus the evaporation heat transfer is promoted and the heat transfer performance is remarkably improved.
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