低温强热型空气源热泵热水器试验研究

Experiment of Low Temperature Heat-flash Type Air Source Heat Pump Water Heater

采用中间喷射的涡旋热泵热水器专用压缩机及带经济器的系统设计，构成低温喷气增焓热泵热水器试验系统。试验结果表明：该系统能在-20～43℃环境下正常运行，制取65℃较高温度的热水。系统在环境温度高于20℃，且最高出水温度达到65℃时，能效比（COP）在3．4以上；在-15℃环境温度下COP依然能够保持在2．0以上；在-7℃--7℃段制热能力比目前常规热泵系统提高21％-28．9％。有效地扩大了（非二氧化碳）热泵系统的气候适应范围。

Adopting the mid-injection compressor that exclusive for scroll type heat pump water heater and the designed system with economized equipment, to form a low-temperature Economized Vapor Injection heat pump water heater experimental system. The experiment results shows that this system could operate normally at ambient temperature - 20 ℃ to 43 ℃, and be able to produce 65 ℃ hot water. When this system operate at an ambient temperature more than 20 ℃, and the hightest outlet water reaehs 65℃, the COP could be and even more than 3.4 ; the COP of system still maintained at 2.0 even at ambient temperature - 15 ℃ ; when operating at - 7 - 7℃, the heating capacity could increase 21% - 28.9% compare to the conventional heat pump system. It efficiently enlarge the acclimation scope of heat pump system（ Non-Carbon Dioxide）.