介绍了一种用于家用空调和热泵的空冷式热交换器的钎焊铝热交换器。与目前使用的设计相比，钎焊铝设计提供了高性能的单位重量。目前使用的室内热交换器在圆管上有板翅。室外热交换器使用圆形管，带有脊椎翅片几何形状的板翅。钎焊铝热交换器由1.0英寸的挤压铝管制成。（25.4毫米）大直径和9.16英寸。（4.06毫米）小直径。这些管子的直径为0.031英寸。（0.79毫米）厚的薄膜，间距为0/194英寸。（4.93 mm），以满足R22200 psi（15 MPa）的设计压力。空气侧使用百叶窗翅片几何形状。对两种翅片几何形状变体进行了风洞试验，每种变体分别有12、15和18个翅片/英寸。（472591和709翅片/米）。与3/8英寸的12 fpi（472翅片/米）平板翅片相比。 （9.5毫米）直径的管子，铜焊铝设计的传热系数高出90%，只有25%的高压降。与直径为3/8英寸（9.5毫米）的18 fpi（709翅片/米）脊椎翅片设计相比，铜焊铝设计的传热系数高44%，压降小10%。爆破压力测试表明，管道在1900 psi（13 MPa）压力下失效。将膜厚度增加到0.036英寸。（0.91 mm）将满足要求的2200 psi（15 MPa）爆破压力。关键词:性能、热交换器、铝、单元空调、热泵、管道、测试、比较、传热系数、热流、压降、高压、膜、厚度、几何形状、直径、R22、制冷剂科学:研讨会论文，马里兰州巴尔的摩，1992年

Describes a brazed aluminium heat exchanger developed for air-cooled exchangers used in residential air conditioners and heat pumps. The brazed aluminium design provides high performance per unit weight than currently used designs. Presently used indoor heat exchangers have plate fins on round tubes. The outdoor heat exchanger uses round tubes with either a plate fin of a spine fin geometry. The brazed aluminium heat exchanger is made of extruded aluminium tubes having a 1.0 in. (25.4 mm) major diameter and a 9.16 in. (4.06 mm) minor diameter. The tubes contain 0.031 in. (0.79 mm) thick membranes spaced at 0/194 in. (4.93 mm) to meet the R22, 2,200 psi (15 MPa) design pressure. The air side uses the louvred fin geometry. Wind tunnel tests were made on two fin geometry variants, each having 12, 15, and 18 fins/in. (472, 591, and 709 fins/m). Compared to a 12 fpi (472 fins/m) plain plate fin with 3/8 in. (9.5 mm) diameter tubes, the brazed aluminium design gives a 90% higher heat transfer coefficient for only 25% high pressure drop. Compared to an 18 fpi (709 fins/m) spine fin design with 3/8 in (9.5 mm) diameter tubes, the brazed aluminium design gives a 44% higher heat transfer coefficient and a 10% smaller pressure drop. Burst pressure tests showed that the tube failed at 1,900 psi (13 MPa). Increasing the membrane thickness to 0.036 in. (0.91 mm) will meet the required 2,200 psi (15 MPa) burst pressure.KEYWORDS: performance, heat exchangers, aluminium, unit air conditioners, heat pumps, tubes, testing, comparing, heat transfer coefficient, heat flow, pressure drop, high pressure, membranes, thickness, geometry, diameter, R22, refrigerants