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Rooftop air handling unit, can be used to replace the cold air unit: such as unit plant, VRV, can also replace the chiller: such as modular unit (water system), as long as the installation of air duct conditions can be used for centralized refrigeration treatment and air supply.
Rooftop air handling unit, can be used to replace the cold air unit: such as unit plant, VRV, can also replace the chiller: such as modular unit (water system), as long as the installation of air duct conditions can be used for centralized refrigeration treatment and air supply.
The rooftop air handling unit has its own cold source, the system is simple, there is no need for pipeline welding, the system is more environmentally friendly, and the project cost is saved. The unit is placed on the roof or outdoor ground space, without the equipment room, water pump, cooling tower, fan coil and other supporting equipment, which can save the space occupied by the refrigeration system.
The unit adopts multi-system design, and the compressor is put into operation according to the actual load. When the load is high, all the compressors are put into operation. When the load is low, some compressors are put into operation, so that the unit can have higher energy efficiency ratio under partial load and run smoothly.
(1)Using 2-4 compressors independent system, set a number of independent system loops, single to achieve multi-level regulation, mutual work without interference, at the same time to ensure that one system failure, the other system normal operation.
(2)Under low load conditions, the compressor is rotated to ensure that the running time of each compressor is similar and the service life of each compressor is extended.
(3)Hierarchical starting, small starting current, reduce the impact on the power grid.
The surface of the frame plate of the unit is subjected to multi-layer protection treatment, using "ZERO-RUST" patent anti-corrosion coating technology, using high-quality steel plate as the substrate, and three strengthening processes: the surface is first galvanized, and then subjected to multi-layer protection process treatment measures such as anti-corrosion spray treatment, ensure that the unit can ensure excellent protection effect in various climatic environments.
The rooftop air handling unit is a direct expansion system with lower dew point dehumidification function. Compared with the traditional cold-water air conditioning unit, which is difficult to achieve the ideal dehumidification effect under the normal outlet temperature. The direct expansion system uses the refrigerant to directly cool and dehumidify the air, canceling the heat transfer of the intermediate water system. The evaporation temperature of the refrigerant can dynamically change with the adjustment of air temperature and humidity, so the dehumidification performance of the direct expansion unit is better than that of the cold-water unit. In the rainy and high humidity season, the direct expansion system makes the indoor humidity control more stable.
RISITA breaks the traditional temperature-time defrost model. Using the combination of ambient temperature and coil temperature linear fitting, intelligent judgment defrosting cycle and defrosting time. Automatically calculate the outdoor coil temperature corresponding to different outdoor ambient temperatures, automatically form intelligent defrosting logic, and maintain continuous optimization of learning ability. The unit can intelligently change the defrosting conditions according to the change of outdoor ambient temperature, adapt to different climate regions, stabilize heating, keep the indoor temperature constant, and make the system run more stable.
