Water-Cooled Screw Industrial Low-Temperature Freezer -35℃

This series of water-cooled screw industrial low-temperature refrigeration units can provide refrigerant at temperatures from -35°C to -5°C. It features the following characteristics:

1. Industrial-grade high configuration and standard design: Water-cooled screw industrial low-temperature refrigeration unitUtilizing high configuration and optimized system integration to cast high-quality products, our professional team designs with industrial-grade standards, ensuring low noise and minimal vibration. Designed for industrial standards, our products are suitable for continuous 24/7 operation throughout the year.

2. Combines multiple innovative technologies, ensuring high efficiency, energy-saving, stability, and outstanding performance.

1) Innovative energy-saving technology for economic machinesConsumes up to 5% less energy than units without an economizer.

2) PLC Programmable Logic Controller Technology:Achieve communication control for the start/stop signals of ancillary equipment like water tower pumps, to avoid unnecessary energy loss.

3). Efficient Gas-Liquid Separation Technology:Ensures efficient heat exchange for shell-and-tube heat exchangers and full evaporation of the refrigerant liquid in the reflux evaporator, followed by further heat exchange.

4) Low-Temperature Oil Cooling TechnologyCooling the refrigeration oil with low-temperature refrigerant, then injecting it into the compressor to fully lubricate the internal moving parts of the compressor and to maximize the removal of heat generated by the motor, to avoid long-term high temperatures inside the motor, ensuring efficient, stable, and long-lasting operation of the motor as well as the flexibility of the moving parts.

3. Compact structure, superior performance, and stable operation:

The industrial low-temperature refrigeration unit with water-cooled screw technology employs high-quality imported double screw bearings, with its moving parts being only 1/10 of a reciprocating compressor's and vibrations being only 1/5. It utilizes a high-precision combination of German FAG and Swedish SKF bearings in both radial and axial directions, along with an axial thrust balancing drum to effectively balance the axial load, resulting in a failure rate of only 1/10 that of a reciprocating compressor. The unit is further enhanced by world-renowned control components, ensuring long-term safe and stable operation. Both the condenser and the dry evaporator use highly efficient heat transfer pipes, and the main unit is equipped with an imported high-efficiency semi-hermetic double screw compressor, offering many advantages such as compact structure, small size, lightweight, and minimal installation space. The semi-hermetic double screw compressor has fewer moving parts and employs a 5:6 ultra-efficient screw rotor, ensuring no direct wear between rotors and high reliability. As the screw compressor is a continuous unit with no pulsations, the machine is characterized by stable performance, low noise, minimal vibration, and smooth operation. It is 20% to 30% more efficient than reciprocating compressors.

4. Comprehensive Energy Control System:

The water-cooled screw industrial low-temperature refrigeration unit features a four-stage and variable capacity control system, energy regulation: [100, 75, 50, 25 (or start, 0%)], automatically adjusting the unit's start/stop based on load changes for greater energy efficiency. During operation, the computer control system adjusts the unit's energy output according to the client's thermal load changes. The microcomputer quickly judges and sends signals to push the throttle valve to the required energy by monitoring the difference between the actual load and the user's settings. Moreover, in multi-unit systems, it operates optimally with the least power consumption for the best cooling output, demonstrating excellent performance under full load and high operating efficiency even under partial load.

5. The refrigeration system operates independently:

The high-capacity water-cooled screw industrial low-temperature refrigeration unit features two or more independent refrigeration circuits, ensuring that the unit can continue to operate even if one circuit fails or requires maintenance. It is equipped with a backup function, making it particularly suitable for industrial environments where continuous operation is crucial; the imported PLC has a human-machine interface with a liquid crystal touch screen, offering graphic display and easy operation, with options for both English and Chinese. It comes with an RS485 national standard communication interface, enabling connection to DCS systems and integration into the entire factory's automated control network, facilitating remote operation and monitoring. The display presents information in both graphic and tabular form for easy visibility; simply select operations from the menu on the screen and touch the displayed buttons directly with your fingers.

6. Microcomputer Programmable PLC Controller with Multiple Protection Features:

The water-cooled screw industrial low-temperature freezer is equipped with protection features such as high compressor coil temperature, oil pre-heating timer on/off, cold water flow switch, low cold water outlet temperature protection, Y-△ startup failure protection, high exhaust temperature protection, compressor overload protection, power failure memory function, frequent start/stop protection, abnormal voltage protection, low oil level protection, high/low pressure protection, etc.

7. Multi-layer protection, secure, reliable, and stable:

Water-cooled screw industrial low-temperature freezerOffer comprehensive protection for refrigeration systems, electrical systems, and water systems, ensuring the unit operates safely and reliably. Equipped with safety features such as compressor motor overheating, overcurrent, phase sequence anomaly, excessive exhaust temperature, high pressure, low pressure, low pressure differential, freezing point, and open circuit, the pressure control devices of the refrigeration system guarantee the unit's flawless operation. In addition to the compressor's internal protection module offering over/under voltage, phase loss, and overload protection, the pressure control devices of the refrigeration system ensure the unit operates without fail.

8. Easy installation and immediate operation for use:

Water-cooled screw industrial low-temperature refrigeration units come with a dedicated industrial low-temperature refrigeration testing platform. This ensures that all components are fully installed, and the unit has undergone different operating conditions, debugging, and testing within the factory. Each unit is guaranteed to be 100% qualified upon shipment, pre-filled with refrigerant and lubricating oil. Users only need to connect the water and electrical circuits to start operation, significantly reducing on-site installation and debugging time.