The screw-type water chiller manufacturers use semi-hermetic compressors as the main unit, which not only improves the efficiency of the compressor's operation but also avoids leakage issues when starting the compressor, reducing service costs for refrigerant addition and shaft seal replacement, enhancing the reliability and ease of operation for long-term continuous use. Equipped with a Siemens industrial-grade PLC controller and a liquid crystal touch screen for fully automatic operation, it features automatic/manual control, parameter setting and calibration, data recording, fault alarm and recording, and cumulative running time recording, enabling complete automation without the need for dedicated personnel management. Large-capacity units use semi-hermetic screw compressors with economizers for operation, which increases efficiency and allows for the selection of imported brand heat exchangers for the low-temperature grade anti-corrosion evaporator and condenser. The use of electronic expansion valves for微量adjustment of the refrigerant ensures energy-saving operation under partial and full load conditions. Based on the compressor's built-in energy regulation, a hot gas bypass regulation is added for infinite energy adjustment of the unit. Most units are assembled as a whole at the factory, charged with refrigerant, and subjected to a load test of not less than 8 hours to ensure a successful first-time startup on-site for the customer. (The factory is equipped with a refrigerant test bench and a refrigerant carrier test bench.) It is a new generation of low-temperature freezing equipment designed for special industries such as chemicals, beverage bottling, food processing, photovoltaics, and can automatically adjust the temperature range from 30 degrees to minus 40 degrees. According to the different operating conditions of the customer's actual production temperature point requirements, targeted optimization of freezing and cooling methods is adopted to achieve the expected production process requirements, which is a unique advantage of our company. Our company can design targeted freezing and cooling solutions according to different customer needs. In terms of compressor type, they can be divided into piston, scroll, and screw compressors, etc.
Explosion-proof screw chillers employ various methods such as explosion-proof, increased safety, intrinsic safety, positive pressure, oil-filling, sand-filling, non-sparking, sealed filling, and airtightness to ensure safe operation in flammable and explosive environments. They are available in different explosion-proof levels based on the specific characteristics and safety requirements of the operating conditions. Accessories include explosion-proof compressors, explosion-proof electrical control boxes, explosion-proof water pumps, explosion-proof flow switches, and explosion-proof controllers.
Explosion-proof screw-type chillers utilize the third-generation 5:6 asymmetric rotor semi-hermetic screw compressors from international standards. The motor and compressor are integrated, eliminating concerns about shaft seal leakage. The combination control program for two or more compressors is designed for reasonable and balanced load distribution on the machine head components, thereby extending the unit's lifespan. The two or more compressors use multiple refrigeration circuits; when one circuit requires maintenance, the others can continue to operate normally, featuring backup functionality. The compressors use star-delta reduced-voltage starting to avoid impacting the power grid. Siemens PLC touch-color screen is selected, with microcomputer control and a user-friendly full-Chinese main interface for simple operation.
Evaporative refrigeration units automatically detect the temperature of the chilled water output, the system effectively tracks the on-site usage load by automatically adjusting the compressor energy. The display is clear and easy to read, allowing for real-time data readout for reference. In case of a fault, it can trigger an automatic alarm and display the cause of the fault for easy resolution. It can output relevant feedback information to other master control systems based on on-site requirements. It can also be modified to suit on-site needs, such as the location of the air conditioning unit, various protection points of the unit, and pressure levels. The evaporative condenser is an updated and improved heat exchange equipment developed by absorbing and refining heat exchange technologies from both domestic and international sources.
