Variable frequency screw chiller

The Zanyu variable-frequency falling film screw chiller integrates advanced technologies such as variable-frequency compression, vector variable-frequency control, variable VI, parallel connection of fixed-frequency and variable-frequency dual units, falling film evaporation, and built-in oil separator condensation. It inherits the high COP advantage of fixed-frequency units while introducing the high IPLV (coefficient of Performance at partial load) advantage of variable-frequency VI compressors. The dual-unit parallel technology further enhances the partial load performance of the unit. The strong combination of the two can achieve a maximum IPLV of 8.0 for the unit, reaching the energy-saving level.

The Zanyu variable frequency falling film screw chiller is highly favored by the market for its reliable stability, energy conservation and environmental protection advantages. It is widely used in hotels, hospitals, cinemas, stadiums, entertainment centers, commercial buildings, office buildings, industrial and mining enterprises and other places to provide cold water for central air conditioning systems.

Environmentally friendly refrigerant

To protect the ozone layer, mitigate the greenhouse effect of the atmosphere, and fulfill humanity's aspiration for environmental protection, the unit selects R134a environmentally friendly refrigerant, which has an ozone depletion potential of 0, is safe, non-toxic, non-flammable, green and environmentally friendly, and conforms to the current international environmental protection development trend.

Variable frequency dedicated compressor

Variable-frequency dedicated screw compressor, with enhanced motor insulation and high reliability; The water temperature control accuracy is high with 20-80HZ stepless frequency conversion regulation.

Variable content product ratio

The built-in volume ratio (VI) of the compressor is adjustable, avoiding the problem of increased compression power consumption caused by overcompression or undercompression in ordinary compressors due to changes in operating conditions. It maintains the optimal compression efficiency throughout the entire operating range, and its partial load performance coefficient (IPLV) is 13% higher than that of ordinary compressors.

Vector type frequency converter

The unit adopts vector type frequency conversion control (magnetic field directional control technology), which can automatically adjust the rotational speed according to the working conditions, rationally allocate the motor's rotational torque, and respond to load changes in real time. The frequency converter is equipped with a built-in reactor to prevent noise interference. The motor generates little heat, operates efficiently and energy-saving, and has low operating costs. When the power factor of the frequency converter is above 0.9, it can make full use of electrical energy and reduce the equipment capacity value of power supply equipment in the power grid (transformers, power lines). It complies with the provisions of the national standard GB/ T14549-1993 "Power Quality - Harmonics in Public Power Grids", with the total harmonic voltage distortion rate THDu≤5%.

Falling film evaporator

The unit adopts a high-efficiency falling film evaporator independently designed and manufactured. The refrigerant liquid film evenly covers the surface of the heat exchange tubes, with low bubble resistance and higher heat exchange efficiency than ordinary shell and tube heat exchangers. Compared with the flooded evaporator, the refrigerant charge is reduced by 35%. The liquid level is relatively low, so there is no problem of liquid carrying during suction, and the oil return performance is excellent.

Definitely one transformation + parallel connection of two machines

A dual-unit parallel design of a fixed-frequency and a variable-frequency compressor inherits the high COP advantage of the fixed-frequency unit while introducing the high IPLV advantage of the variable-frequency compressor. When one compressor is shut down, the heat exchange area of the other doubles, further enhancing the partial load energy efficiency ratio of the unit. The strong combination of the two can achieve an IPLV of up to 8.0 Reach the energy-saving grade.

First-class accessories and excellent performance

We select high-quality brand screw compressors, control valves and electrical control devices with quality assurance, ensuring reliable quality and stable performance.

Highly intelligent control system

Industrial-grade controllers are adopted to conduct real-time monitoring and analysis of various operating parameters of the unit, ensuring that the unit is always in the best operating condition. The system is equipped with a fully Chinese display, featuring a friendly interface and convenient operation.

Friendly human-machine interface

It adopts a 7-inch 64K color true-color touch screen with a user-friendly interface. It is equipped with a high-performance 32-bit CPU inside, and its fast processing capability can enhance work efficiency. The panel protection grade is as high as IP54. It meets the electromagnetic compatibility requirements of industrial environments and has strong anti-interference ability.

Network communication function (optional)

It is equipped with an RS-485 physical interface, which can not only realize the networked group control of multiple hosts, but also communicate with various intelligent devices that have public communication protocols, and has functions such as remote communication.

The product quality is reliable.

Each unit is strictly tested in accordance with the inspection items stipulated by the national standards through the full performance test bench designed and manufactured by Hefei General Machinery Research Institute. Only when all performance indicators meet or exceed the requirements stipulated by the national standards is it allowed to leave the factory.

1. Refrigeration nominal operating conditions: The outlet temperature of the chilled water is 7℃, and the water flow rate is calculated as "nominal cooling capacity" *0.172m ³ /(h*kw). The outlet temperature of the cooling water is 30℃, and the water flow rate is calculated as "nominal cooling capacity" *0.215m ³ /(h*kw)
2. The outlet temperature range of the cooling water is 5 to 15℃. The fouling coefficient on the water side of the evaporator is 0.018m ² ℃/KW, and that on the condenser is 0.044m ² ℃/KW
3. It is recommended that the wiring be done with polyvinyl chloride insulated power cables (copper core wires) at 30℃. When connecting the cables, the same diameter conductors produced by the same company must be used. 4. The external dimensions and other parameters of the unit are shown in the unit's external drawing