Evaporative Low-Temperature Chiller, Low-Temperature Chiller

The evaporative low-temperature chiller main unit features the third-generation 5:6 asymmetric rotor semi-hermetic screw compressor 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 to balance the load of the high-quality components, thereby extending the unit's lifespan. The two or more compressors utilize multiple refrigeration circuits; when one circuit requires maintenance, the others can continue to operate normally, providing backup functionality. The compressor employs a star-delta voltage reduction start, avoiding any impact on the power grid. A Siemens PLC with a true-color touch screen is used for microcomputer control, with a user-friendly full-Chinese interface for simple operation.

Automatically detects the cold water outlet temperature, 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 reading of operating data for reference.

The system can promptly and automatically alert for faults, displaying the cause for easy resolution.

The system can output relevant feedback information to other master control systems based on the on-site needs.

The original content can be amended based on on-site requirements, such as the location of the air conditioner, the various protection points of the unit, and pressure. The evaporative condenser is an updated and improved heat exchange equipment developed through the absorption and advancement of domestic and international heat exchange technologies.

The evaporative condenser uses water and air as cooling mediums, exchanging heat with the high-temperature gaseous coolant inside the coils, causing the refrigerant to condense from a gas to a liquid state. The condenser is internally equipped with a water distribution system, condensing coil assembly, packing heat exchange layer, and a water separator; externally, it features a circulating water pump, an electronic water descaling device, and an axial flow fan at the top side of the coils. Under the action of the axial flow fan, the condenser chamber is maintained in a negative pressure state. During operation, the cooling water is evenly and completely covered on the coil surface by the strong wind force, with the high-temperature gaseous refrigerant entering from the top of the coil and the condensed liquid refrigerant exiting from the bottom. In this process, the high-temperature refrigerant exchanges heat with the water and air outside the coil, and with the help of the wind, the heat exchange efficiency is significantly improved. After absorbing heat, the cooling water and air temperatures rise, with some of the cooling water evaporating into steam, carrying away a large amount of heat, which is then drawn away by the fan and released into the atmosphere. The moisture in the hot air is intercepted and collected in the water separator, while the high-temperature cooling water that has not evaporated flows into the packing heat exchange layer, where it is cooled by the air passing through, and then returns to the collection pool after sufficient cooling. The water lost to the atmosphere is promptly replenished by the water float valve within the collection pool.

The heat exchange products utilize the technology of co-directional mixed flow type secondary heat exchange with coil and PVC filling, achieving high heat exchange efficiency.

Due to the airflow and spray water flowing in the same direction through the coil, the spray water can extensively cover the coil surface, ensuring complete wetting. Compared to the reverse structure of wind and water, it significantly reduces the formation of dry spots on the coil walls and scale.