Digital thermostat, widely used in central air-conditioning fan coil, fresh air units and other air-conditioning end of the temperature control system equipment. Air conditioner thermostat is composed of LCD panel, control box, electric actuator and valve body. Air conditioner thermostat with large-screen LCD display, through the air conditioner thermostat internal NTC temperature sensor, detecting indoor temperature. And real-time with the user set the temperature to be compared automatically adjust the air flow at the same time regulate the flow of hot and cold water, keep the room thermostat, in order to achieve energy-saving purposes. Electric valve is a special and central air-conditioning fan coil, fresh air unit supporting the product, the drive and valve body composed of two parts, the drive by a synchronous motor drive, gear drive, with a screw to adjust the valve opening. Body part of the piston structure. Electric valve can be used with air-conditioning thermostat supporting the use of air-conditioning system to achieve hot and cold water flow control. New examples of air conditioner thermostat and electric valve: Newly developed two-way "float valve" and "floating point thermostat" of Xinling Group, and "proportional integral control valve and thermostat". These new products change the "on and off" mode of water supply to the room's central air conditioning thermostat to a "more and less" way of supplying water as a function of room temperature change, keeping the temperature difference within 2 ° C.