| 摘要 |
PURPOSE:To obtain the heat exchangers of superior heat tansfer characteristics, lightness in weight and small sizes by using the casting molds using the specific resins as a pattern and integrally forming fin plates and porous metals around the zigzag pipe by the special method in producing the heat exchangers. CONSTITUTION:With resins having continous cavities such as foamed urethane or the like as a pattern, casting mold material such as of plaster slurry is filled in the abovementioned cavities and the resins are removed by heating or the like, whereby split film casting molds 6, 7 are formed. The casting molds 6, 7 are incorporated to a heat transfer pipe 1 having beforehand molded to zigzag form in the lengthwise direction of the plural pipes 1 by leaving a clearance 9. Molten metal such as copper or other is filled through vacuum or pressure operation into the holes of the casting molds 6, 7 and the clearances 9. After the metal has solidified, the casting molds are removed. This yields the heat exchanger integrally molded with the fin blocks 2 having the heat transfer pipe 1, fin plates 3, and three-dimensional continuous spaces 4. The fin plates 3 improve the coupling and heat transfer and reception between the blocks 2 and heat transfer pipe 1. It is also possible to perform the removal of the foregoing resin patterns after incorporation to the heat transfer pipe 1. |
