二级压缩热泵热水器特性的测试研究

Study on properties of the two-stage air-source heat pump water heater

空气能热泵热水器是一种重要的节能装置,它能在投入一个单位高品质能量的条件下产出多于一个单位热量,对节能起到重要作用。然而普通空气能热泵热水器系统在-15℃以下低温环境无法正常工作,且低温下能效偏低。二级压缩(含准二级压缩)技术能在超低温(-25℃)正常使用,本文对二级压缩及准二级压缩技术在热泵中的能效能力特性进行研究。实验证明,二级压缩(含准二级压缩)技术在低温条件下用于热泵热水器中有明显优势。

Air-source heat pump water heater is an important energy-saving device, and play an important role in energy saving. Compared to traditional gas or electric water heater, It can produce more than one unit of heat under the conditions of a unit of high quality energy. However, ordinary air-source heat pump water heater can＇t work properly when the ambient temperature is lower than -15℃, and the efficiency it low in low temperature. Two-stage compressor （including quasi two-stage compressor） can working well in ultra-low temperature （-25℃）. This paper study on the properties of air-source heat pump water heater used two-stage and quasi two-stage compression technology. Experiment showed that two-stage （including quasi two-stage compression） air-source heat pump water heater system has obvious advantages in low temperature.