相变蓄热蒸发型空气源热泵控制系统的开发
Control system development of phase change heat storage evaporative air-source heat pumps
摘要：
相变蓄热蒸发型空气源热泵系统能很好地解决空气源热泵供热过程中存在的能量供需矛盾，提高其性能，但必须有高性能控制系统作保障。开发的控制系统采用基于STM32F103微控制器的数据采集与输出控制电路，可实时采集热泵机组主要设备进出口管路温度、压缩机压力及水箱液位高度等参数，主中处理器（CPU）通过RS232总线将相关参数发送至人机界面（HMI），用于显示系统各动态参数。该系统还可对压缩机、水泵、四通换向阀、蒸发器及管路电磁阀进行启停控制，实现了热泵系统供热蓄热、供热放热和除霜放热模式下的自动稳定运行。现场测试表明，控制系统性能稳定、运行可靠、节能效果良好。
Abstract：
Phase change heat storage type evaporative air-source heat pump system can solve the contradiction between supply and demand of energy in the heating process of air-source heat pump and improve the performance of the heat pump system, but must have a high performance control system as a guarantee. The control system is designed based on STM32F103 microcontroller data collection and output control circuit, which can collect real-time parameters of inlet and outlet pipeline such as temperature， compressor pressure and liquid height of water tank. The CPU sends the related parameters to the human machine interface (HMI) through the RS232 bus, used for displaying system parameters. The control system can start and stop compressors, pumps, four-way reversing valve, evaporator and solenoid valve, realizing the automatic and stable operation of the heat pump system in the modes of heating-heat storage, heating-heat discharge and defrosting-heat release. Field test shows that the control system is stable, reliable and energy efficient.
Keywords:air-source heat pump, phase change heat storage, hot water unit, microcontroller, human machine interface (HMI)