| 摘要 |
For heat pumps, which draw a part of their energy e.g. from the outside air, the temperature of the air represents the lowest limt of the ideal circuit process. The smallest temperature difference between energy carrier element air and refrigerant is only possible with very much greater heat exchange surfaces or with this system. The basis of this system is the parallel installation of the individual elements in the same air flow. The refrigerant is sprayed into the element, at which the air flow emerges. At this element, an energy exchange takes place with a greater temperature difference (see diagram to Fig. 1). As a result of the great temperature difference, the air precipitates the greatest humidity here. This humidity leads to ice incrustation. With corresponding control, the icing remains on this element. As an icing takes place only on this element, defrosting is relatively simple. On the entry of the refrigerant into the further elements, the differential temperature becomes smaller with each element. The refrigerant outlet element is the same as the air inlet element. Consequently, this differential temperature, which exists between the outside air present and the refrigerant, is very small. |
