The Shanghai HanLeng chiller integrated screw chiller screw integrated explosion-proof refrigeration unit mainly has the following characteristics:

1. Energy saving and low consumption

(1) The system has high efficiency and integration efficiency, with an energy efficiency improvement of about 15% compared to conventional water-cooled chiller systems and over 35% compared to air-cooled chiller systems.

(2) The system has a small distribution capacity, reducing the investment cost of the distribution system.

(3) As an optional option, the integrated screw chiller unit can be equipped with a variable flow control system, which allows the water pump to operate at low frequencies under partial load, greatly reducing the energy consumption of system transmission and distribution.

2. Save data center space

(1) The unit adopts an integrated structural design, which places the screw type water-cooled chiller, cooling equipment, chilled water pump, spray (cooling) water pump, water pipeline, valves, water system accessories, water treatment device, sound insulation device and control system in a modular framework, with a compact structure and smaller footprint.

(2) The integrated screw chiller unit is designed with a sheet metal frame that is resistant to sunlight, rain, and rust. The unit can be placed outdoors as a whole, greatly reducing the space requirements of the machine room compared to conventional chiller systems.

3. Silent and low-noise

(1) The exhaust side of the compressor adopts a double-layer shell, which greatly reduces the aerodynamic noise of the exhaust and makes the operation of the unit quieter.

(2) Adopting a low-noise and high-efficiency water pump and fan system can effectively improve the operating efficiency of the unit while reducing its noise and vibration.

(3) The integrated chiller unit adopts a "sandwich" structure filled with fluorine free polyurethane and wrapped with steel plates, greatly reducing the operating noise of the unit.

4. Easy to install and maintain

(1) The production of integrated screw chiller units adopts factory standardized production methods. Compared with conventional machine room installation, it has a higher degree of standardization, faster progress, and more guaranteed quality control.

(2) The integrated screw chiller unit adopts a panel seamless enclosure structure, and the panel can be easily disassembled to ensure convenient maintenance of the unit.

(3) The installation of the unit is convenient and fast, and users only need to complete the pipeline connection and insulation work between the unit and the indoor water system, saving time and reducing installation costs.

5. Compressor

(1) Adopting a world-renowned high-efficiency twin-screw compressor with a 5:6 patented asymmetric tooth profile, unique radial bearing force and α axial thrust balance drum design, the motor temperature rise is small, the integrated chiller unit has a wide operating range, can bear large compression ratios, dynamically adapt to changing working conditions, and ensure the safety of the unit.

(2) The rotor is made of high heat resistant and high rigidity alloy steel, and the surface is treated with carburizing and laser hardening to ensure that the rotor has no thermal deformation and a lifespan of up to 100000 hours.

(3) By adopting the "cyclone type" oil separation technology, the separation efficiency can reach up to 99.98%, which not only increases the lubrication safety of the unit, but also effectively reduces the heat transfer resistance of the lubricating oil to the copper tube, improves the efficiency of the unit, and makes the heat transfer characteristics of the unit perfect.

6. Shell and tube evaporator

(1) The shell and tube evaporator adopts high-efficiency heat exchange tubes with internal and external threads, and its unique geometric structure and turbulence effect ensure the efficient heat transfer performance of the heat exchanger.

(2) Dynamic built-in distributor technology: allowing refrigerant to evenly enter each heat exchange tube. This technology effectively improves the efficiency of the heat exchanger, resulting in a significant increase in the overall efficiency of the unit.

(3) The unique supercooling design effectively improves the cooling capacity and energy efficiency ratio of the integrated water-cooled chiller unit.

(4) The heat exchanger tube plate is processed and formed in one go using a CNC machining center, and the copper tube and end plate are fixed with precision ball expander to ensure sealing and prevent leakage.

(5) The shell side of the heat exchanger is treated with shot blasting and phosphating, and CO2 gas shielded welding is used for welding to ensure that the unit is clean and free of impurities.

(6) Combining with the water quality situation in China, increasing the fouling coefficient and corrosion margin design can ensure the safety of unit cooling output and pressure vessel use even in environments with poor water quality.

7. Throttling device

The electronic expansion valve adopts a world-renowned brand and successfully embeds software and hardware modules controlled by the electronic expansion valve in the system. The controller monitors the compressor load and its changing trend in real time during operation, and sends driving pulses to the electronic expansion valve to control its opening degree based on parameters such as evaporation pressure, suction temperature, exhaust pressure, and preset superheat. Based on load changes, precise control of refrigerant supply to the evaporator is achieved. Compared with conventional mechanical thermal expansion valves and orifice plate throttling units, this electronic expansion valve not only has strong adaptability, stable control, good dynamic matching performance, but also is more efficient and energy-saving.

8. Water pump and water treatment system

(1) Adopting internationally renowned brand water pumps, with high efficiency, low noise, and long service life.

(2) The unit is equipped with an efficient water treatment device, which effectively delays scaling and improves the efficiency and lifespan of the unit.

9. Control system

(1) The unit adopts an international brand industrial grade PLC controller, which can achieve zero defects in a large temperature range

Control effectively avoids defects such as unstable drift and logic failure under extreme working conditions.

(2) Using precision and high stability electronic components, the output is stable and reliable without drift.

(3) Adopting a world-renowned touch screen as the human-machine interface. Full Chinese display, operators can easily and intuitively operate by lightly pressing the screen according to the prompts on the screen.

(4) By adjusting the movement of the compressor slide valve and the number of compressors running, the performance of the integrated water-cooled chiller unit can be matched with the load at any time, improving the partial load efficiency of the unit.

(5) The unit has up to 19 multiple protection functions, including system high voltage protection, system low voltage protection, unit high and low pressure difference protection, chilled water flow protection, low outlet temperature protection, power phase loss protection, power phase sequence protection, power "overvoltage" protection, power "undervoltage" protection, compressor motor overheating protection, compressor oil temperature protection, compressor oil level protection, compressor exhaust temperature high protection, compressor anti frequent start protection, sprinkler water pump water shortage protection, sprinkler water overload protection, chilled water pump overload protection, sensor fault protection, fire emergency pressure relief protection, etc. In case of a fault, it can automatically stop and lock the fault, providing automatic functions such as fault display and working condition recording.

(6) It can achieve linkage control of chilled water pumps and provide multiple control modes including fixed frequency and flow rate, fixed frequency and variable flow rate, and variable frequency and variable flow rate.

(7) The adaptive control mode of the condensing fan and spray water pump ensures that the unit can operate safely and reliably under a wide range of outdoor temperatures.

(8) As an optional option, each PLC controller can be configured with RS485 standard communication interface and open communication protocol. Through grid lines, operators can use a PC to monitor and remotely control the operation of the unit, and can also easily access the building automation system.

(9) The controller reserves a dedicated interface that can be interlocked with the fire interface to avoid the integrated water-cooled chiller unit running out of water and achieve emergency safety shutdown.

(10) Users can freely choose to control the outlet temperature or return temperature of the unit to match the entire air conditioning system.

(11) Units equipped with dual or more compressors can be started sequentially and automatically rotated to ensure equal operating time for each compressor and extend its service life.

(12) As an optional component, the unit combines the existing mature PLC control theory with today's GSM communication technology to achieve remote on/off, fault alarm, and software upgrade functions of the air conditioning host through mobile phone SMS transmission. This not only improves the automation level and operational reliability of the product, but also achieves "zero gap" service response.

(13) The integrated control system can coordinate and control the chilled water pump, spray water pump, condensing fan, etc. of the unit according to requirements to achieve adaptive adjustment of the unit.

(14) Optional variable flow control function, the system is more stable, energy-saving, and comfortable to use.

11. Quality assurance

(1) By applying the concept of "solid hardware special design" and combining it with "zero defect software protection" measures, the unit can maintain outstanding safety quality under various operating conditions, while also taking into account the safety of operators, buildings, and large systems (including power supply systems, water supply systems, and safety).

(2) Strict process control is implemented in the production of the unit, and all integrated water-cooled chillers undergo two "positive pressure" and "negative pressure" inspections to eliminate the possibility of leakage.

(3) All integrated chiller units undergo factory and safety performance testing in accordance with national standards to ensure a 100% pass rate upon delivery.