| 摘要 |
<p>A reversible refrigeration plant serves as an air conditioner for cooling air or alternatively as a heat pump for heating air. Functions of a refrigerant evaporator and condenser are reversed in the different modes. A main stream of inlet air is divided into separate main and bypass streams of air. The main stream is heated by the condenser of the heat pump and flow between the main stream and the bypass stream is varied in an inverse ratio so that as flow through the bypass duct increases, flow through the main duct decreases and vice versa. Also, as a desired air space temperature is approached, preferably heat rejected at the condenser is gradually reduced by reducing refrigerant flow therethrough by modulating compressor suction. Also, energy is saved in both the heating and cooling modes by locating a heat exchange coil within an exhaust flow of air discharged from the space to be heated or cooled.</p> |
