Introduction
    Yu Jiang wind-cold screw-shaft type cold water machine is a product that combines dominating features of the same products at home and abroad, uses imported well-known brand of semi-close screw-shaft air compressor, high performance and good quality condenser and evaporator, along with global famous chilling and controlling components, applies advanced processing technologies and techniques to fabricate; have such advantages as superior features, stable performance, simple manipulation, compact structure, good-looking appearance, low ratio of incident. Each wind-cold screw-shaft type cold water machine that our company produces is calculated and tested with the accuracy, and combined with superior design features, the machine is tested at the running test center, all specifications can meet or exceed the requirements; additionally our company can also design at the special requests from customers, combine superior technical advantages with strict manufacturing standards to provide customers with non-standard products to save energy and make good quality.

Working principle
    Wind-cold screw-shaft type cold water machine uses wind for cooling, high temperature high pressure gaseous refrigerant escaping from air compressor goes through winged condenser and heat dissipation ventilator to become low temperature high pressure liquid refrigerant, then goes through expansion valve to provide low temperature low pressure liquid refrigerant to evaporator to achieve chilling efficiencies (capacity state: The required input temperature of chilling water: 12℃, the required output temperature: 7℃, the required outside environmental temperature: DB35℃/WB24℃)
Scope of use: Chilling is used in industrial production, such as plastic, five metals, chemical industry, electroplate, electronic, food, packaging, pharmaceutical, textile and used to reduce heat in factories, central air-conditioners hotels, office buildings

Semi-closed screw-shaft air compressor
    Air compressor: uses semi-closed screw-shaft air compressors with brand-names such as HANBELL,BITZER,Ref Comp, is designed with helical screw-shaft rotor of ultra-high efficiency at ratio of 5:6, has higher efficiency normal air compressors from 20%-30%, stable performance, high efficiency, low incident rate, convenient maintenance. When all or part of the machine are in load operation, each air compressor can conduct single or multi-level control with the 75% -100% of the capacity (Semi-closed screw-shaft type air compressor uses refrigerants such as R22, R134a, 404a, R407C, R507a)

Tubular condenser and evaporator.
    Condenser: uses different heat exchanger copper tubes imported from Germany, Japan or domestically produced, the heat exchanger copper tubes of high efficiency are transparently threaded and the wind guide winged   is made of water permeable corrosion- resistant thin aluminum foils in parallel pairs, that expand the mechanical tube to tightly link the copper tubes and aluminum pieces together in order to maximize heat transfer efficiency, compact structure, small volume, light weight, high efficiency of heat exchange, easy cleaning and maintenance.
    Evaporator: uses high-tech threaded heat exchanger copper tubes of high efficiency, the exterior of the copper tubes are spiral and polished while the side water navigation compartment is designed in non-short circuit for even mixing of chilling water, improving heat exchange efficiency.
   
Cooling Units
    Cooling Units use world famous brand names such as DANFOSS ,ALCO,SPORLAN of top quality, superior features that help the machine makes full use of its high efficiency..

Electric control-system
    Electric control-system uses the PLC, PC smart touch screen control system in Chinese language, quick reaction, precise control, with automatic feature of load increase- reduce, automatic control of water required temperature, timing of machine starting- finishing hour and record of the causes of incidents, simple and easy to understand manipulation, and have automatic protection function that can prevent the machine from being damaged during operation, extend the life span of the machine and can perform remote control and central control

Protection devices 
    Overload protection devices of air compressor, over heat protection devices of coiler, overload protection devices of ventilator engine, protection devices of low-high pressure switch, phase protection devices (reverse-phase, phase shortage), protection devices of anti-freezing, safety valve, for smooth operation