The ornamental design for a solar heatexchanger, as shown and described.
FIG. 1 is an elevated, perspective view of the top, front and side of the solar heat exchanger.
FIG. 2 is a front view of the solar heat exchanger.
FIG. 3 is a side view of the solar heat exchanger. The opposite side is a mirror image of FIG. 3.
FIG. 4 is a top view of the solar heat exchanger.
FIG. 5 is a bottom plan view of the solar heat exchanger; and,
FIG. 6 is a bottom perspective view of the solar heat exchanger.
The article in which the design is embodied is a solar heat exchanger which employs the sun's radiation to heat water. In one embodiment, it may be used to heat water which is then directed into a swimming pool to raise the temperature of water contained therein.
The broken lines shown in the drawings are for the purpose of illustrating portions of the article that form no part of the claimed design.