A two-stage compression variable frequency air source heat pump (TV-ASHP) has been developed combining variable frequency technology with two-stage compression cycle.
将双级压缩和变频技术有机结合，提出一种适用于寒冷地区双级压缩变频空气源热泵系统。
2
With comprehensive analysis, two-stage compression cycle is applied to air-source heat pump to adapt to the low-temperature environment.
本文通过综合分析，选择将两级节流中间不完全冷却双级压缩循环应用于空气源热泵热水器以适用低温工况。
3
The utility model provides a double-stage slide valve vacuum pump, which consists of an air pipe and two slide valve cylinders.