This series of water-cooled screw type low-temperature chillers is a high-performance and technologically mature low-temperature freezing product that our company specializes in researching and producing. The outlet temperature can be selected from -45 ℃ to 0 ℃, and the cooling capacity can be selected from 15000 kcal/h to 950000 kcal/h. This low-temperature chiller unit combines the characteristics of many other products, using a specially designed semi enclosed screw low-temperature compressor or two-stage compressor, supplemented by high-efficiency heat exchanger technology, control technology, and excellent system configuration matching. It adopts a microcomputer controller, making the unit have the characteristics of compact appearance, reasonable layout, and easy use and maintenance. Users only need to connect the water system pipeline and the required power supply to put it into operation. This series of water-cooled screw type low-temperature chillers is widely used in industries such as new materials, environmental waste gas recovery, chemical engineering, biomedicine, research and development, and ultra-low temperature cooling sources. The manufacturing technology of this product is mature and the operation is stable and reliable. At present, it has won the favor and recommendation of a large number of customers.
This series of water-cooled screw type low-temperature chillers uses cooling water as the heat dissipation source and a special proportioned refrigerant as the freezing liquid. The product standard is based on GB/T18430.1-2007 "Steam Compression Cold Water (Heat Pump) Units for Industrial, Commercial, and Similar Use". Special attention should be paid to improving the partial load performance and the application of energy automatic regulation devices in the design to save operating costs.
This series of water-cooled screw type low-temperature chillers mainly has the following characteristics:
1. Superior performance:
The host adopts an internationally advanced semi closed screw compressor, motor, and compressor integration, without any concern for shaft seal leakage; Dual or multiple compressors have a start stop cycle control program to balance the load and extend the lifespan of each component; Two or more compressors adopt multiple refrigeration circuits. When one circuit needs maintenance, the other circuits can still operate normally. The water-cooled screw chiller unit has a backup function; The water-cooled screw type low-temperature chiller compressor adopts unloading and pressure reduction starting to avoid impact on the power grid.
2. Easy installation:
The water-cooled screw type low-temperature chiller unit has a compact structure, occupies a small area, and saves space in the machine room; At the time of leaving the factory, strict debugging and calibration have been completed, and it has fully reached the on-site use state; The water-cooled screw chiller unit has low vibration, does not require vibration isolation measures for the foundation, and is easy to install; During installation, only connect the evaporator chilled water and condenser cooling water pipes; Low operation and maintenance costs; The water-cooled screw chiller unit can implement intelligent program control according to the load demand: 100%, 75%, 50%, 25% (or start), 0,
3. Save energy consumption;
The total number of compressor parts for water-cooled screw type low-temperature chiller is only 1/10 of reciprocating type, with a simple structure, few vulnerable parts, no inlet and outlet valves, insensitivity to humidity stroke, and low failure rate; The screw compressor can operate for up to 40000 hours without any faults; Shanghai water-cooled screw chiller unit has complete safety protection functions; Pressure protection: high voltage protection and low voltage electrical automatic protection devices; Motor protection: undervoltage protection, phase loss protection, reverse phase protection, overload protection, motor overheating protection; Oil shortage protection: Anti freezing protection: When the temperature of the chilled water is too low, the water-cooled screw chiller unit will automatically shut down; Safety valve protection: When the refrigerant pressure exceeds a certain value, the safety exhaust valve will automatically open. The various protections of the above equipment ensure the safe and stable operation of the water-cooled screw chiller; Characteristics of screw compressors; Adopting high-efficiency fluorine resistant motors imported from France, with high efficiency and excellent reliability; New third-generation 5-6 asymmetric tooth profile; Four stage capacity adjustment continuous unloading capacity control system for water-cooled screw type low-temperature chiller unit; Equipped with high-precision bearings from FAG in Germany and SKF in Sweden; Swat effect oil separator; Low vibration and low noise.
4. Microcomputer control
German "SIEMENS" PLC programmable touch controller, water-cooled screw type low-temperature chiller human-machine interface fully displayed in Chinese: Italian "CAREL" text display; The water-cooled screw chiller unit automatically monitors the temperature of the cold water outlet, controls the slide valve through PLC, adjusts the compressor, and effectively tracks the on-site usage load; The display screen is intuitive and clear, and the water-cooled screw chiller unit directly displays the various water temperature points and operating time during operation, making it clear at a glance (PLC); Automatically record and save the recent fault alarm situation and occurrence time of the water-cooled screw chiller, and issue fault handling prompts; Revise the original content according to actual needs (with password). Such as the inlet and outlet water temperature, the location of the capacity adjustment, various protection points, pressure, etc. Operation status display (PLC), animated display of operation status, including compressor operation, refrigerant flow status, water flow status, and temperature display; Convenient to understand the operation status of the low-temperature chiller unit.
5. Refrigeration components/electrical components.
The electrical control system and refrigeration system used in the water-cooled screw type low-temperature chiller include relays, thermal protectors, expansion valves, and pressure controllers; The main components such as drying and filtering are well-known products, which improves the reliability of the water-cooled screw type low-temperature chiller unit.
6. Industrial grade platform professional testing:
The platform ensures that all components of the unit have been installed, debugged, and tested under different operating conditions in the factory, ensuring that each device is qualified for delivery and has been filled with refrigerant and refrigeration oil. Users only need to connect the water and circuit to put it into use, greatly reducing on-site installation and debugging time;
7. This series of water-cooled screw type water-cooled screw type low-temperature chillers can be equipped with cloud control service interconnection services according to customer needs, supporting mobile APP control, providing excellent value for money, and realizing 24-hour active after-sales service, so that customers can purchase our company's products without any after-sales service worries.