空气源热水机阀门调节控制系统设计与优化

Air Source Water Heater Valve Regulating Control System Design and Optimization

为了解决传统直热式空气源热水机温度调节误差大、超调量大、恒温出水速度慢以及单位时间进水量少等问题,对其恒温控制器的阀门调节控制系统进行设计优化,在普通阀门电机调节进水流量从而控制出水温度的基础上,加入阀门位置跟踪,解决阀门关死,温度也无法达到设定值的问题;加入温度上升斜率控制,克服了阀门调节频繁、出水量递减和超调现象的出现;根据不同的环境温度,选择首次开阀角度和PID参数,这样能使系统能够快速达到用户设定目标温度。根据运行结果显示,经过阀门电机优化调节控制后,满足了直热式空气源热泵热水机稳定、高效、无超调的恒温出水的要求。

In order to solve the problems of traditional directly-heated air-source water heater, which includes the big error of temperature regulation, big overshoot, slow speed of homothermal temperature water and less water per unit of time and other is- sues. This paper will design and optimize the regulation system of directly-heated air- source water heater homothermal temperature controller, regulate the influent flow in ordinary valve motor to control the temperature of effluent water. Based on the proce- dure, adding the valve position tracking, solving the problems of valve closed and the temperature can not reach the set point. When adding temperature rising slope control, overcoming the occurrence of frequent valve adjustment, the decreased effluent water and the overshoot phenomenon. According to the different environment temperature, selecting the valve opening angle and the PID parameters, which can make the system reach the usersrset temperature quickly. The operation results show that it will meet the stable, high efficient and non-overshoot requirements of homothermal temperature water of directly-heated air-source water heater after optimizing and regulating valve motor.