| 摘要 |
PCT No. PCT/US81/01604 Sec. 371 Date Nov. 30, 1981 Sec. 102(e) Date Nov. 30, 1981 PCT Filed Nov. 30, 1981 PCT Pub. No. WO83/01997 PCT Pub. Date Jun. 9, 1983.Heat exchangers depend for efficiency upon maximizing fluid flow, such as air, through their fins about tubes extending through the fins. The air flow, particularly at the ends of a heat exchanger, can sometimes be of a significantly reduced amount owing to flow restrictions caused by the construction of, or arrangement of elements in, a heat exchanger. A core (12) of a heat exchanger (10) of the present invention utilizes a relatively varied angular arrangement for tubes (16) in the core (12) which improves air flow, particularly at the ends (28,40) of the core (12). Air flow is thus improved over a portion of the heat exchanger (10) to increase heat transfer, as well as purging of debris, for the folded or zipzag core arrangement described.
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