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研究了一级泵变流量风机盘管系统在末端压差控制下的水力特性,结果表明:当系统各支路调试平衡后,任一支路末端用户作为信号取点,部分负荷下系统的水力工况基本类似;控制信号取点用户的启闭对整个系统的影响显著,应将信号取点设置在长期用冷较为稳定的位置;上游用户工况变化对下游用户影响不大,而下游用户工况变化严重影响了上游用户;压差信号取点支路各空调用户工况改变会造成系统水力严重失调,提出了针对此种情况的变压差控制算法。
The hydraulic characteristics of the first-stage variable-flow fan-coil system under the control of terminal differential pressure are studied. The results show that when the system is balanced and debugged, the end user of any branch takes the signal as a signal, The working conditions are basically similar; the control signal takes the user’s opening and closing of the impact on the entire system is significant, the signal should be set point in the long-term use of cold more stable position; upstream user changes in the environment has little effect on downstream users, and downstream users The change of working conditions seriously affects the upstream users. The change of working conditions of air-conditioning users taking point branch of pressure difference signal will cause a serious imbalance of the system hydraulic pressure. A variable-pressure-difference control algorithm for this situation is proposed.