What role can frequency conversion cabinet play?Because the central air conditioning system of the frequency conversion cabinet is designed according to the maximum load and certain margin, in fact, it only operates at full load for more than ten days or even more than ten hours in the middle of the year, and most of the time the load is below 70%. Generally, the load of the refrigeration host in the central air conditioning system can automatically adjust the load with the change of the seasonal temperature, while the matching refrigeration pump and cooling pump can not automatically adjust the load, and almost operate at 100% load for a long time, resulting in a great waste of energy and deteriorating the operating environment and quality of the central air conditioning. With the increasingly mature frequency conversion technology, a closed loop temperature difference automatic control system is formed by the organic combination of frequency converter, PLC, digital-to-analog conversion module, temperature sensor, temperature module and other devices, which can automatically adjust the output flow of the water pump. The variable frequency speed regulation technology can not only keep the room temperature in an ideal state, make people feel comfortable and satisfied, but also make the whole system run smoothly. More importantly, its energy-saving effect can reach more than 30%, which can bring good economic benefits. The frequency conversion control cabinet (frequency conversion electrical control cabinet/electrical control cabinet/electrical control cabinet) adopts the electrical control cabinet developed by domestic and foreign high-quality enterprises. According to the working conditions, AC input reactor, output reactor, DC reactor and EMI filter can be installed in the frequency conversion control cabinet. Relay, programmable controller (PLC), programmable operation terminal (GOT), electric energy meter, cooling fan, etc. According to the working conditions of the system, forward rotation, reverse rotation, motor speed increase, motor deceleration, inching forward rotation, inching reverse rotation, manual/automatic, emergency stop, frequency conversion/power frequency, PLC control, touch screen and other control buttons and indicators. It is set on the panel of the frequency conversion control cabinet and is relatively fixed at present. Escalator frequency conversion control cabinet, central air-conditioning circulating water pump frequency conversion control cabinet, fan frequency conversion energy-saving cabinet, air compressor constant pressure air supply system (frequency conversion energy-saving soft start control system), etc. |