| 摘要 |
<p>A heat pump apparatus comprises a plurality of separate heat pump circuits (P) wherein the condensers (L) of the heat pump circuits are connected in series with respect to the mass current being heated (m) and in a manner such that the temperature of the mass current being heated increases while being in heat exchange relationship with the fluid circulating in the condensers of the separate heat pump circuits. Similarly, a mass current (m) may be cooled on passing in heat exchange relationship with the evaporators of the heat pump circuits. The mass currents may be air or liquid. The apparatus may be used for drying timber (Fig. 6). <IMAGE></p> |
