The ornamental design for a heatpump for swimmingpools, as shown and described.
FIG. 1 is a front perspective view of a heat pump for swimming pools showing my new design;
FIG. 2 is a front elevational view of a heat pump for swimming pools;
FIG. 3 is a rear right perspective view of a heat pump for swimming pools;
FIG. 4 is a rear elevational view of a heat pump for swimming pools;
FIG. 5 is a right side view of a heat pump for swimming pools;
FIG. 6 is a left side view of a heat pump for swimming pools; and,
FIG. 7 is a top plan view of a heat pump for swimming pools.
Portions or features of the heat pump for swimming pools not shown in the Figures form no part of the claimed design. In the drawings, the broken lines depict environmental subject matter only and form no part of the claimed design.