Intelligent Controller, Frequency Conversion Controller, Switch Power Supply manufacturer / supplier in China, offering DC Inverter Heat Pump Control PCBA for 4.7kw 4 Pipe Water Heater and Chiller, DC Inverter Heat Pump Control PCBA for 4.7kw 4 Compressor Water Heater and Chiller, Heating Cooling Room Temparature Controller Thermostat and so on.