Abstract: A method of plating a substrate includes etching at least a portion of a surface of the substrate to form voids within the surface. The substrate includes a composite material with a network of electrically conductive nanostructures dispersed therein. Electrodes are attached to the substrate, it is placed in a bath of a first electrically conductive metal, and a voltage is applied to the substrate through the electrodes to deposit a first electrically conductive metal layer onto the surface of the substrate, and a second electrically conductive metal layer is electroplated thereon.

Abstract: A jumper tube for connecting a flow restricting capillary tube and an evaporator in a refrigerator system includes a transition portion in between a cavity portion and a cylindrical portion. The transition portion is crimped and folds a portion of the jumper tube sidewall onto itself to form a passage in the shape of clam shell. The transition portion prevents the creation of popping sounds in the jumper tube due to uncontrolled expansion of refrigerant exiting the capillary tube.

Abstract: A heat exchanger which, in one embodiment, includes an elongate tube having a plurality of straight tube segments and a plurality of bent tube segments to form a generally oval spiral configuration is described. The straight tube segments form opposite sides of the exchanger, and the straight tube segments are configured to be located substantially perpendicular to a direction of air flow. A space is formed between the exchanger opposite sides, and the cross-sectional area of the space between the exchanger opposite sides continuously decreases from a first end of the exchanger to a second end of the exchanger. An end straight tube segment substantially extends over, or substantially covers or closes, an opening between opposing tube segments at the exchanger second end. A plurality of heat exchange fins project outwardly from the elongate tube. Due to its general shape, the above described heat exchanger sometimes is referred to herein as a pyramid exchanger.