| 摘要 |
The present invention relates to a heat exchanger of the type involving a nest of tubes formed from concentric layers of wound pipes, in which the pipes in each layer are attached, generally near their ends, by being fitted between two successive crowns in a series of crowns, with the inside edge of one crown extending round the outside edge of the crown it fits on to, so as to form a plate reaching out transversally from the core. The pipes in each of the wound layers preferably rest in the concave sections of ridged uprights laid lengthwise along the core, and fitted between each pair of layers, or between the first layer of pipes and the core, the said ridged uprights being attached at their ends to the crowns holding the ends of the pipes.
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