Our series of water-cooled screw-type low-temperature chiller is a high-performance, mature low-temperature freezing product that we have professionally researched, developed, and manufactured. It offers discharge temperatures ranging from -45℃ to 0℃ and cooling capacities from 15,000 kcal/h to 9,500,000 kcal/h. This low-temperature chiller integrates many features from other products, utilizing a custom semi-hermetic screw compressor or a twin-screw compressor, coupled with high-efficiency heat exchanger technology, control technology, and an excellent system configuration. It features a microcomputer controller for compact appearance, reasonable layout, and easy operation and maintenance. Users can simply connect the water system pipes and the required power supply to start operation. The series is widely used in industries such as new materials, environmental gas recovery, chemicals, biomedicine, R&D, ultra-low-temperature cold sources, and more. The product has a mature manufacturing technology and stable, reliable operation, and has gained popularity and recommendations from numerous clients.
This series of water-cooled screw-type low-temperature chillers uses cooling water as the heat dissipation source and a mixed refrigerant as the refrigerant. The product standards are in accordance with GB/T18430.1-2007 "Commercial and Industrial Water Chilling (Heat Pump) Units and Similar Applications." Special attention has been given to improving part-load performance and the application of energy automatic regulation devices in design, to save operation costs.
The series of water-cooled screw chillers for low-temperature chilled water mainly features the following:
1. Superior Performance:
The main unit employs an internationally advanced semi-hermetic screw compressor, motor, and integrated compressor design, eliminating concerns of shaft seal leakage. The dual or multi-compressor system features start-up and shutdown cycling control programs, balancing the lifespan of all components. Compressors of two or more use multiple refrigeration circuits, allowing the rest to operate normally when one circuit is undergoing maintenance. The water-cooled screw chiller unit has a backup function; the compressors of the low-temperature water-cooled screw chiller units start with unload and降压, avoiding grid shock.
2. Easy Installation:
The compact water-cooled screw-type low-temperature chiller unit occupies minimal floor space and saves machine room area; it is fully debugged and set to run upon factory shipment, ready for on-site operation; the water-cooled screw chiller has minimal vibration, does not require vibration isolation measures, and is easy to install; installation simply involves connecting the evaporator chilled water and condenser cooling water pipes; operates with low maintenance and operating costs; the water-cooled screw chiller can be controlled programmatically based on load demand: 100%, 75%, 50%, 25% (or start), 0.
3. Energy conservation;
Water-cooled screw chillers have a total number of compressor components only 1/10 of reciprocating chillers, featuring a simple structure, fewer wearing parts, no inlet and outlet valves, insensitive to humidity changes, and a lower failure rate; screw compressors can operate without failure for up to 40,000 hours; Shanghai water-cooled screw chillers are equipped with comprehensive safety protection functions; pressure protection: high-pressure and low-pressure electrical automatic protection devices; motor protection: under-voltage protection, phase loss protection, phase reversal protection, overload protection, motor overheating protection; oil shortage protection: anti-freezing protection: the chiller will automatically shut down when the chilled water temperature is too low; safety valve protection: the safety exhaust valve will automatically open when the refrigerant pressure exceeds a certain value. These protective features ensure the safe and stable operation of the water-cooled screw chillers; characteristics of screw compressors: equipped with a high-efficiency, fluorine-resistant motor imported from France, offering high efficiency and reliability; new third-generation 5-6 asymmetric tooth design; four-stage capacity control system for water-cooled screw chillers with low-temperature operation; matched with high-precision bearings from Germany's FAG and Sweden's SKF; Swirl effect oil separator; low vibration and low noise.
4. Microcomputer Control
German "SIEMENS" PLC Programmable Touch Controller, Water-Cooled Screw Chiller Human-Machine Interface with Full Chinese Display: Italian "CAREL" Text Display; Water-Cooled Screw Chiller Auto-Monitor Cold Water Outlet Temperature, PLC-Controlled Sliding Valve, Compressor Adjustment for Effective Field Operation Load; Intuitive Display Shows Operating Water Temperature Points and Running Time Directly (PLC); Automatically Records and Saves the Fault Alerts and Occurrence Times of the Latest Water-Cooled Screw Chillers, and Provides Fault Handling Tips; Modify Existing Content as Needed (Password Required). Such as Inlet and Outlet Water Temperatures, Capacity Adjustment Position, Various Protection Points, Pressure, etc.; Operating Status Display (PLC), Animated Display of Operating Status, Including Compressor Operation, Refrigerant Flow, Water Flow, and Temperature; Easy to Understand the Operation of the Low-Temperature Chiller System.
5. Refrigeration Components/Electrical Components.
The electrical control system used in the water-cooled screw-type low-temperature chiller, including relays, thermal protectors, expansion valves, pressure controllers, and drying filters, are all renowned products, enhancing the overall reliability of the water-cooled screw-type low-temperature chiller.
6. Industrial-grade platform professional testing:
The platform ensures that all components are fully installed, and the equipment has undergone operation debugging and testing under various conditions within the factory. This guarantees that each unit is qualified for shipment, pre-filled with refrigerant and lubricating oil. Users can simply connect the water and electrical systems to put the equipment into use, significantly reducing on-site installation and debugging time.
7. This series of water-cooled screw chillers can be equipped with cloud control and interconnect services to meet customer needs, supporting mobile APP operation for added value. We offer 24-hour proactive after-sales service, ensuring our customers have no worries regarding after-sales support for our products.