Intelligent Controller, Frequency Conversion Controller, Switch Power Supply manufacturer / supplier in China, offering DC Inverter Controller PCBA for Dual System 2.2kw Low Temperature Water Heater and Cooler, DC Inverter Heat Pump Control PCBA for 4.7kw 4 Pipe Chiller, CE ISO Smart WiFi Room Thermostat for Water/Gas Boiler Heating and so on.