| 摘要 |
<p>A heat pump having an indoor coil (13) that operates as a condenser when the system is in a heating mode and an outdoor coil (12) that operates as an evaporator when the system is in the heating mode. A variable speed indoor fan (23) is used to move supply air over the indoor coil and a temperature sensor (29) is arranged to provide ambient outdoor temperature data to a programmable computer (30). The computer contains a schedule for continuously adjusting the speed of the indoor fan (23) in response to changes in the ambient temperature so as to maintain the temperature of the supply air at a constant level. In doing so, the compressor discharge pressure is also maintained within allowable limits and is held substantially constant.</p> |
