Hitachi water chiller accessories electronic expansion valveG7C03588A

Electronic expansion valve some people will use this thing, but for some ordinary people, it is a strange thing, so electronic expansion valve, how does this thing work, what effect does electronic expansion valve have! About these questions and small make-up together to look down! Electronic expansion valve some people will use this thing, but for some ordinary people, it is a strange thing, so electronic expansion valve, how does this thing work, what effect does electronic expansion valve have! About these questions and small make-up together to look down! Electronic expansion Valve I. What is the principle of electronic expansion valve? 1. Electronic expansion valve through the internal preset program for the evaporator to adjust the amount of liquid, because more in line with the requirements of refrigeration motor, electronic expansion valve gradually replaced the thermal expansion valve. 2. At present, there are two kinds of electronic expansion valve: electromagnetic expansion valve and electric expansion valve. The solenoid expansion valve has a solenoid coil inside, through the solenoid coil as a medium to control the flow of the system. Before the solenoid is energized, the valve needle is in an open state. After the solenoid is energized, the opening degree of the valve needle is controlled by the voltage on the solenoid coil, the voltage of solenoid coil controls the flow of expansion valve, solenoid expansion, expansion valve response is faster, usually the refrigeration system has been in an electrified state. 3. The electric expansion valve is a kind of device driven by stepping motor, which controls the movement of the valve needle driven by the thread through the logic digital signal provided to the stepping motor, thus, the control of the flow rate and the area of the valve can be realized. Two

Electronic expansion valve is a throttling element that precisely controls refrigerant flow through electrical signals. Its core lies in the collaborative work of sensors, controllers, and actuators to achieve rapid and precise adjustment of valve opening.

G7A03588A

G7D04544A COIL

Electronic expansion valve is a key throttling component in refrigeration systems, which precisely adjusts the refrigerant flow rate through electronic control to achieve efficient and stable system operation. Its core functions include: 3 4
Throttling and pressure reduction: Throttling the medium temperature and high pressure liquid refrigerant from the condenser to a low temperature and low pressure state, creating conditions for heat absorption and evaporation in the evaporator. 56
Control superheat: By monitoring the outlet temperature of the evaporator, ensure that the refrigerant vapor has appropriate superheat, which not only avoids compressor liquid hammer but also fully utilizes the heat transfer area of the evaporator. 37
Dynamic flow regulation: Adjust the valve opening in real-time according to changes in system load, change the refrigerant flow entering the evaporator, and quickly respond to external demand. 48
Extended control function: plays an important role in scenarios such as heat pump defrosting, compressor exhaust temperature control, and energy-saving light load start-up, improving system energy efficiency and reliability. 37