Overall frame structure description the overall support frame and bottom plate of the unit are made of galvanized steel plate (ral7025) with paint treatment on the external surface, with high strength and strong corrosion resistance.. The unit is equipped with protective grille of surface cooler and protective plate of compressor and refrigeration parts as standard to effectively block noise transmission while protecting the unit. The layout in the unit is designed through three-dimensional optimization. The layout is compact. The optimized shape proportion requires small maintenance space, which significantly saves space.

The fully enclosed scroll compressor of international famous brand is adopted, which is efficient, low-noise, stable and reliable. Crankcase heater and perfect control and protection device shall be configured to ensure the safe operation of the unit. The refrigeration system design with double compressors and single circuit is adopted, and the energy efficiency of the unit is higher under partial load. The first compressor of each unit shall be started one by one, and the second compressor shall be started after all starts are completed. The starting current is small and the unit efficiency is high.

AISI316 stainless steel brazed plate heat exchanger is used for efficient heat exchange. The surface is coated with closed cell neoprene insulation material to prevent condensation on the surface of the plate heat exchanger; In addition, the built-in plate heat exchanger can prevent the plate heat exchanger from freezing under adverse conditions.

The air side heat exchanger adopts hydrophilic aluminum foil design to improve condensate drainage capacity and heat exchange effect; The copper pipe is designed with high efficiency internal thread copper pipe to improve the refrigerant heat exchange effect

The unit adopts microcomputer intelligent control system, which can automatically adjust the temperature and air flow. In case of any fault, it can take protective action, alarm and record in time, and can conduct network monitoring to realize unattended. Multi language menus and shortcut keys, common status parameters are graphical, and the unit operation status is clear at a glance. The compressor has the function of uniform running time and prolongs the service life of the whole machine. The microcomputer intelligent controller has perfect functions of fault protection, alarm, recording and analysis, high and low voltage switch, overload, overcurrent, overheating, exhaust temperature, water flow, antifreeze and other protection functions, and realizes fault recording and alarm display.

External rotor fan design is adopted for super heat exchange to improve heat exchange effect. The fan blade is three-dimensional shaped, with light weight, good rigidity and high precision. It is equipped with a low-speed motor, so it runs smoothly and has low noise. A safety grille is installed outside the condensing fan.

The unit adopts electronic expansion valve, which has the following characteristics:
Accurately control refrigerant flow and optimize heat exchange performance of evaporator.
Control and adjust according to the suction superheat of the unit, and the performance is more stable.
Improve the unit's efficiency of deviated working conditions and low load operation.
Rapid response, rapid adjustment according to load change, and stable outlet water temperature of the unit.