Electronic Expansion Valve Controller
(EEV Controller)


The Electronic Expansion Valve (EEV) Controller is a precision control device designed to regulate refrigerant flow in refrigeration and air conditioning systems. By continuously monitoring system conditions through sensors and adjusting the valve opening, the controller optimizes refrigerant flow, enhancing energy efficiency and system performance.

Comparison Between Electronic and Mechanical Expansion Valves
 

Category	Electronic Expansion Valve Controller	Mechanical Expansion Valve
Control Method	Electronic sensors and algorithm-based	Mechanical response to temperature and pressure
Precision	Very High	Limited
Response Speed	Fast	Slow
Adjustability	User Adjustable	Not Adjustable
Energy Efficiency	High	Moderate
Applications	High-performance, large-scale systems	Small, simple systems

 

【 Features 】

1. Precise Refrigerant Flow Control: Maintains consistent superheat levels by regulating refrigerant flow through the evaporator.
2. Sensor-Based Intelligent Control: Adjusts valve openings using real-time superheat data obtained from suction gas temperature and pressure sensors.
3. Automatic PID-Based Adjustment: Utilizes an advanced PID control algorithm to automatically regulate refrigerant flow based on system conditions, ensuring stable and efficient operation.
4. Comprehensive System Protection: Provides shutdown alerts and warning alarms in the event of overheating, high pressure, or refrigerant shortages, safeguarding the system.
5. Durability for Industrial Use: Engineered for stable and reliable operation even under harsh industrial conditions.
6. Multiple Control Modes: Supports various control applications, including Superheat control, Hot gas bypass temperature control, Drive control for step motors or pulse motors.
7. Remote Monitoring and Communication: Supports Modbus RTU protocol, enabling remote monitoring, system diagnostics, and communication-based control via industrial networks.
8. Versatile Applications: Suitable for a wide range of systems, including Refrigeration systems, HVAC systems, Industrial chillers, Medical and laboratory cooling equipment.
 

Model	Superheat Control	Hot Gas Control	Drive Control	Communication Control	Unipolar Valve	Bipolar Valve
XV1-A	○	○	○	X	X	X
XV1-M	○	○	○	○	X	X
XV2-S	○	○	○	○	○	○

Power	Main Power: 24VAC/DC Dual Use Backup Power: 12VDC (Optional, for emergency operation when the main power is off)
Input	DI: Operation/Stop, Defrost Input AI: Temperature Sensor (Thermistor), Pressure Sensor/External Input (4~20mA)
Output	DO: Alarm Output (Relay C Contact, 250VA 3A)
Motor	EEV Control Output (Unipolar/Bipolar)
Communication	RS-485 1Ch, (MODBUS RTU) (Optional)
Operating Environment	-10℃ ~ 50℃ (0~95%, Non-Condensing)
Storage Environment	-20℃ ~ 60℃ (0~95%, Non-Condensing)
Compatible Refrigerants	R22, R134A, R404A, R407C, R410A, R507, R452A, R452B, R502 (More to be added continuously)