热泵热水器运行中常见问题分析及改进措施

Analysis on Common Problems of Household Heat Pump Water Heater during Operation Period and Its Improvement Measurements

本文针对家用空气源热泵热水器在实际运行中出现的当热水平均温度高于50℃时,压缩机频繁开启过热保护从而不能正常工作,严重时甚至烧毁压缩机这一常见问题进行了模拟分析,指出了问题产生的原因。笔者认为,采用热泵热水器专用压缩机、热水平均温度超过50℃后采用辅助电加热、以及冷凝器的两步换热法可以改善压缩机的恶劣工况,延长压缩机的使用寿命。

For the household air-source heat pump water heater,when the supply water temperature above 50℃,the overheat protection of the compressor will be started frequently,therefore the system can not work normally and even lead to equipment burnout.In order to solve this problem,the corresponding simulation was carried out in this paper.It was pointed out that following strategies could improve the performance of compressor and prolong its service life,such as using special compressor for heat pump water heater,adopting additional electric-heating and two-step heat change method of condenser when water temperature above 50℃.