近年来，从节能和有效利用设备的角度出发，空气源热泵系统已成为全国关注的焦点。然而，通常的热泵系统存在一些问题，例如，1）机理复杂，2）它们需要定期除霜，以防止室外盘管结霜导致效率下降。在加热操作过程中，3）在低环境温度下的加热操作中，液体回流到压缩机。一些论文讨论了结霜特性及其除霜问题。几名研究人员试图掌握结霜的环境温度和湿度区域，并试图摆脱除霜操作。然而，似乎没有任何空气源热泵系统能够成功地防止结霜。 取消了除霜操作，无需使用外部热源。针对传统空气源热泵系统存在的问题，提出了一种新型热泵系统，并对其性能进行了实验研究。本文给出了新系统的实验研究结果。引文:新墨西哥州阿尔伯克基市阿什雷学报第84卷第2部分

Recently, air-source heat pump systems have been brought into the national limelight from a stand point of saving energy and utilizing equipments effectively. However, there are some problems in usual heat pump systems, e. g., 1) the mechanism is complicated, 2) they periodically need defrosting to prevent the efficiency from going down due to frosting on the outdoor coil.during heating operation, 3) liquid floodback to the compressor takes place in heating operation under low ambient temperature, etc.Some papers have dealt with the frost formation characteristics and their defrosting problems. Several researchers tried to grasp the ambient t.emperature and humidity region for frostingt and attempted to get rid of the defrosting operation. However, there did not seem to be any airsource heat pump systems which successfully prevented frost formation.and removed defrosting operation without using external heat source.We proposed a new heat pump system to solve the problems accompanied by traditional airsource heat pump systems as mentioned above, and studied its performance experimentally. In this paper, the results of experimental study of the new system are given.