中文摘要：

介绍了二氧化碳热泵热水器性能、控制、尺寸和重等改进措施,对主要部件的技术特征进行了分析,总结了日本二氧化碳热水器的发展趋势,同时介绍了全球二氧化碳热泵热水器技术的市场潜力。从技术和市场两个方面的分析总结,以便全面了解二氧化碳热泵热水器产业现状和发展方向。

英文摘要：

The improved measures such as performance,control,size and weight are introduced which shows the trends of CO2 heat pump water heater.Further more,the key parts are analyzed,which is good for having a compressive sight on Japan CO2 heat pump water heater.The international CO2 heat pump water heater market is also introduced.Therefore,the CO2 heat pump water status and developing trend can be summarized from both technical and marketing views.