Flooded Screw Chiller

Core Technology Highlights

Key Features of the Unit

1.Positive Pressure Refrigerant Design: The unit uses positive pressure refrigerant, eliminating the need for an additional evacuation device, simplifying the machine room ventilation design.

2.Semi-Hermetic Twin-Screw Compressor: Utilizes a semi-hermetic twin-screw compressor independently developed by Hanbell, with the motor and compressor integrated into a single unit, completely eliminating shaft seal leakage, resulting in high transmission efficiency, low noise, and a long maintenance cycle.

3.High-Efficiency Flooded (Spray-Type) Evaporator: Liquid refrigerant forms a uniform liquid film on the outside of the heat exchange tubes, improving heat exchange efficiency by more than 10% compared to dry evaporators; low refrigerant charge volume meets environmental requirements; bottom oil collection design combined with an ejector pump ensures smooth oil return.

4.Built-in Oil Cooler: Uses refrigerant as the cooling medium, eliminating the need for additional cooling water, resulting in a compact and maintenance-free structure.

5.Independent Ejector Pump Oil Return System: Ensures timely oil return to the compressor under any load conditions, preventing damage due to oil shortage.

6.Fixed Orifice Plate Throttling: No moving parts; flow control is achieved through the dynamic balance of the refrigerant itself, ensuring stable operation under full load, partial load, and variable conditions without lag. 7.Intelligent Microcomputer Control: Chinese human-machine interface, clear display of operating data, and convenient operation.

High Reliability Assurance

1.Professional Design and Manufacturing: Hanbell Precision Machinery has focused on the research and development and manufacturing of screw compressors for over twenty years, maintaining a leading market share in the domestic screw compressor market with mature and reliable technology.

2.Authoritative Certification and Testing: The unit has passed the certification of the National Compressor Refrigeration Equipment Quality Supervision and Inspection Center. Each unit undergoes full performance testing according to national standards before leaving the factory to ensure stable quality.

3.Reliable Ejector Pump Oil Return: Utilizing an ejector pump as the oil return component, and using high/medium pressure flash gas as the power source, low-pressure side oil return is achieved without energy loss to the unit, ensuring compressor safety.

High-Efficiency and Energy-Saving Design

1.Semi-Hermetic Twin-Screw Compressor: High transmission efficiency, stable operation, low noise, and low maintenance costs, making it more energy-efficient than traditional open-type compressors.

2.High-Efficiency Condenser: Adopting a top and bottom chamber + baffle plate design, the liquid refrigerant flows down along the edge of the shell, significantly improving the heat exchange efficiency of the copper tubes, reducing the condensing temperature by 0.5~1℃, and significantly improving the unit's energy efficiency.

3.Flooded (Spray) Evaporator: The refrigerant forms a liquid film on the outside of the heat exchange tubes, resulting in a high heat transfer coefficient; smooth oil return further improves system efficiency.

4.Orifice Plate Throttling Control: Dynamically adjusts the refrigerant flow rate, always perfectly matching the unit load, avoiding the mechanical wear and control lag of traditional throttling valves.

Advanced Intelligent Control

1.High-Speed Microcomputer Controller: Processing speed of 0.25ms/1K Words ensures stable unit operation and rapid response.

2.User-Friendly Human-Machine Interface: The touchscreen has built-in storage space, displaying the complete operating status of the unit in real time, providing intuitive and convenient operation.

3.Precise PID Control: Automatically adjusts the unit load based on the deviation between the chilled/hot water outlet temperature and the target value, achieving water temperature control accuracy of ±0.3℃.

4.Comprehensive Unit Protection: Features over 30 safety protection functions, including over-voltage, under-voltage, phase sequence protection, compressor overload, high and low pressure protection, and anti-freeze protection, ensuring equipment safety.

5.Cloud Service and Building Integration: Reserved Modbus-RTU communication protocol allows seamless integration with building monitoring systems; cloud services are provided, supporting remote monitoring and early warning.

Model Explanation