Integrated Water-Cooled Screw Chiller Unit

The Huahui HHWS/DZ Series integrated water-cooled screw industrial chiller mainly features the following:

1. System integrates efficiently for energy-saving, with outdoor rainproof design without needing a machine room: The integrated water-cooled screw industrial chiller combines optimized refrigeration system components, achieving high-efficiency integration of the unit's system components, pumps, and cooling towers. This results in system integration and energy-saving, with the entire unit featuring rainproof sheet metal design and can be directly placed outdoors, eliminating the need for a dedicated machine room and saving on construction costs.

2. Programmable PLC control with a single-button start, enabling the entire refrigeration system to operate fully automatically: Offers remote and on-site single-button start/stop and program operation; once started, the refrigeration system operates automatically based on the cooling load, with all system components communicating and coordinating for optimal performance.

3. Industrial-grade High-configuration and High-standard Design: Utilizing high configuration and the best system integration to cast high-quality products, designed by a professional team to meet industrial-grade standards, featuring low noise and minimal vibration, designed for continuous 24/7 operation throughout the year.

4. Integrates multiple innovative technologies, ensuring high efficiency, energy-saving, stability, and superior performance of the product.

1) Energy-saving technology with economizer: More than 5% more energy-efficient than units without an economizer.

2) PLC Programmable Logic Controller Technology: Achieves联动 control of water tower pumps and other auxiliary equipment for start-up and shutdown signal communication, to avoid unnecessary energy consumption.

3) High-efficiency vapor-liquid separation technology: Ensures efficient heat exchange in shell-and-tube heat exchangers and complete evaporation and reheat of refrigerant liquid in the回流 evaporator.

4) Low-Temperature Oil Cooling Technology: Utilizes low-temperature refrigerant to cool the refrigeration oil, then injects it into the compressor to thoroughly lubricate the internal moving parts and dissipate the heat generated by the motor, preventing long-term high temperatures within the motor. This ensures the motor operates efficiently, stably, and has a long service life, as well as maintaining the flexibility of the moving parts.

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

Utilizing high-quality imported twin-screw bearings, the moving parts are only 1/10 of those in a reciprocating compressor, and the vibration is only 1/5. The radial and axial bearings are precision German FAG and Swedish SKF combinations, complemented by an axial thrust balancing drum to effectively balance axial loads, resulting in a failure rate just 1/10 of that in a reciprocating compressor. Coupled with world-renowned control components, the unit ensures long-term safe and stable operation. The unit's condenser and dry evaporator both use high-efficiency heat exchange tubes, and the main unit is equipped with an imported semi-hermetic twin-screw compressor known for its compact structure, small size, lightweight, and minimal installation space. The semi-hermetic twin-screw compressor has fewer moving parts, employs a 5:6 ultra-high-efficiency screw rotor, and has no direct wear between rotors, offering high reliability. As the screw compressor is a continuous unit with no pulsation, the integrated water-cooled chiller unit boasts stable performance, low noise, minimal vibration, and smooth operation. It is 20% to 30% more efficient than reciprocating compressors and has obtained ISO 9001 international certification and patents in multiple countries in Europe and America.

6. Comprehensive Energy Control System:

The integrated water-cooled industrial chiller features a four-level and stepless capacity control system, energy regulation: [100, 75, 50, 25 (or start, 0%)], automatically adjusting the chiller's start/stop based on load changes for greater energy savings. During operation, the computer control system adjusts the chiller's energy output according to the client's thermal load changes. The microcomputer quickly detects the difference between the actual measured load and the user's setting to send signals to push the throttle valve to the required energy level. Additionally, in multi-system configurations, it operates optimally with minimal electrical consumption when outputting cooling capacity, demonstrating excellent performance not only at full load but also at part load with high operating efficiency.

7. Refrigeration system operates independently:

The high-capacity integrated water-cooled screw industrial chiller has two or more independent refrigeration circuits, ensuring that the other circuit can operate normally even if one circuit fails/maintains. It features backup functionality, making it particularly suitable for continuous industrial operation environments. The imported PLC has a human-machine operation interface with a liquid crystal touch screen, offering graphic display and easy operation with optional English and Chinese languages. Equipped with an RS485 national standard communication interface, it can be connected to DCS systems and integrated into the entire factory's automated network, facilitating remote control and monitoring. The parameters are displayed in both graphic and tabular text formats for easy visibility. Operations can be selected via the screen menu, and the display buttons can be directly touched with a finger.

8. Microcomputer Programmable PLC Controller with Multiple Protection Functions:

Compressor coil over-temperature protection, oil pre-heating timer on/off switch, cold water flow switch, low cold water outlet temperature protection, Y-Δ startup failure protection, exhaust temperature over-protection, compressor overload protection, power failure memory function, frequent start/stop protection, abnormal voltage protection, low oil level protection, high and low pressure protection, and other protective functions.

9. Multi-layer Protection, Safe, Reliable, and Stable: Offers comprehensive protection for the refrigeration system, electrical system, and water system, ensuring the unit operates safely and reliably. Features safety protections such as overheating of the compressor motor, overcurrent, phase sequence error, high exhaust temperature, high pressure, low pressure, low pressure differential, freezing point, and open circuit, etc. The pressure control devices of the refrigeration system ensure the unit operates without any failings; In addition to the over/under voltage, phase loss, overload protection functions provided by the compressor's internal protection module, the pressure control devices of the refrigeration system also ensure the unit operates without any failings;

10. Easy installation and prompt operation for immediate use:

Industrial-grade dedicated testing platforms ensure that all component installations, operation adjustments, and tests under various conditions have been completed within the factory. This guarantees that each unit is qualified for shipment, pre-filled with refrigerant and lubricating oil. The user only needs to connect the water and electrical circuits to put the equipment into operation, significantly reducing on-site installation and debugging time.

For more integrated water-cooled screw-type industrial chillers, please contact Huahui's relevant service personnel directly.