A drive force transmission apparatus disposed within a differential carrier and adapted to drivingly couple first and second rotary shafts. Prior to initiation of a defrost mode, an electronic expansion device is moved to an open position such that refrigerant can migrate between the indoor-outdoor heat exchangers. The control electronics enables the addressing of an individual or preselected set of probes, for controlling reading andor writing, thereby securing the considerable advantage of versatility and efficiency of readingwriting in a parallel operation mode. The inlet port is in the inner wall of the swirl chamber adjacent to the first end of the swirl chamber and provides fluid communication between a region exterior to the de-agglomerator and the swirl chamber.