From the perspective of the survival of the fittest in the market, we will introduce a series of units with high cost performance. The advantage that this series can stand out from the market is that they all use a CH290 scroll compressor.

According to conventional thinking, there is not much difficulty in choosing the type of compressor. Scroll compressors are used for small units, screw compressors are used for medium units, and centrifugal compressors are used for large units. Why even mention the choice of compressor type?

Let's do a simulation selection, assuming that an air-cooled chiller of about 200kW is required.

Choose the R22 refrigerant screw machine, 40STE-210AS4, the cooling capacity is 214kW, and the price is 136,000 yuan.

Choose R134A refrigerant screw machine, 40STE-M310AS4, the cooling capacity is 217kW, and the price is 166,000 yuan.

Choose this series of units, 20STB-V75AT4, with a cooling capacity of 197kW and a price of 108,000 yuan.

From the book data, the refrigerating capacity of the scroll machine is 8% larger than that of the screw machine, and the price of the scroll machine is 21% lower than that of the ordinary screw machine, and 35% lower than that of the same grade of environmentally friendly refrigerants.

I believe that everyone has a clear understanding of which products are competitive, especially for projects with environmental protection needs. The same is true for water-cooled chillers and heat pump machines, so I won't give an example here. The following describes the overlapping area of cooling capacity of the scroll machine and the screw machine.

Looking at the instruction manual A31 "Hongxing Modular Scroll Water/Air-cooled Chiller", you can see that the cooling capacity of a single scroll unit can reach 300kW. The small cooling capacity of the screw single unit is 90kW. It can be seen from this that the cooling capacity of a single unit ranging from 90kW to 300kW is the area where the scroll and the screw overlap. In the future, when bosses encounter projects with a single unit cooling capacity ranging from 90kW to 300kW, they can flexibly choose between scroll and screw to facilitate order fulfillment.

20STB series water-cooled chillers are manufactured with famous brand compressors and electronic control components, equipped with high-efficiency shell-and-tube condensers and evaporators. The units are controlled by microcomputers, equipped with various protection functions, and have high reliability. Drunk big effect. Designed for comfortable air conditioning, it can be used in parallel/module of multiple machines, and is suitable for various commercial buildings such as hotels, shopping malls, and office buildings. Contains WO open type and WC type box type. Modular combinations can be made according to customer needs. Refrigerant: R410A Refrigeration range: 150kW-300kW

20STB series air-cooled chillers are manufactured with famous brand compressors and electronic control components, and are equipped with high-efficiency fin condensers and shell-and-tube evaporators. The unit is controlled by microcomputer and equipped with various protection functions, which can accurately control the operating conditions, with high reliability, and can play a great role in actual working conditions. It is designed for comfortable air conditioning, cooling applications, and is suitable for hotels, shopping malls, office buildings, etc. All kinds of commercial buildings. Modular combinations can be made according to customer needs.

Refrigerant: R410A

Cooling range: 130kW-260kW