Tonifying qi doublestage compression high temperature heat pump unit

The utility model discloses a tonifying qi doublestage compression high temperature heat pump unit, it includes evaporimeter (1), condenser (2), throttle expansion valve (3), the first compressor (4),second compressor (5), economic ware (6), first aeration valve (7), second aeration valve (8), first control valve (9) and second control valve (10). The utility model has the advantages of reasonable design, can adopt two kinds of operating conditions of single -stage compression and doublestage compression, system's operation is nimble reliable, exhaust temperature through tonifying qi technique reduction compressor increases the refrigerant flow, can guarantee the sufficient super -cooled rate of refrigerant to the energy efficiency ratio of multiplicable unit promotes the performance of high temperature heat pump unit, has fine economy and social. 本实用新型公开了种补气双级压缩高温热泵机组，它包括蒸发器（1）、冷凝器（2）、节流膨胀阀（3）、第压缩机（4）、第二压缩机（5）、经济器（6）、第补气阀（7）、第二补气阀（8）、第控制阀（9）和第二控制阀（10）。本实用新型结构设计合理，可采用单级压缩和双级压缩两种运行工况，系统运行灵活可靠；通过补气技术降低压缩机的排气温度，