What is the scope of use of screw chillers, and what are the classifications of screw chillers?

The water-cooled screw chiller is widely used in many industries such as blister industry, plastic industry, electroplating industry, electronics industry, fish farming industry, construction industry, machinery industry, hardware industry, chemical industry, pharmaceutical, food processing and preservation.

The screw chiller has a proprietary screw rotor profile design, which directly drives the compressor rotor by the motor, with outstanding compression efficiency and quiet operation, advanced economizer and double-circuit design, spool valve stepless adjustment of compressor capacity and precise dynamic control of electronic expansion valve, optimizes the intelligent energy-saving reset function of the system's part-load efficiency, and automatically adjusts the chilled water when the return water or outdoor ambient temperature temperature decreases through a high-sensitivity temperature sensor.

The main control parameters of the screw chiller are the refrigeration performance factor, rated refrigeration capacity, input power and refrigerant type. Screw chillers can be used in the plastic industry, electroplating industry, electronics industry, fish farming industry, construction industry, machinery industry, etc. The multi-head screw chiller has excellent partial load performance and can be selected according to the actual situation.

Li Gong of Kaideli R&D Department is for you.

Screw chillers are currently widely used, mainly in the industrial sector. It is especially used for cooling on the production lines of chemicals, plastics, electroplating, medicine, food additives, etc., and where chilled water is required in the production process. In the electroplating industry:

Because there are many acidic and alkaline solutions in the electroplating industry that need to be cooled, and the corrosiveness is very large, the service life is generally not long, so the demand for screw chillers is very large. Plastic industry: the injection molding unit needs chilled water to cool down during the working process, etc.

Advantages of screw chiller:

1.The structure is simple, the moving parts are few, the wearing parts are few, only the piston type 1 10, the failure rate is low, and the life is long;

2.The circular motion is stable, there is no "surge" phenomenon during low-load operation, low noise and low vibration;

3.Compression ratios up to 20 and high EER values;

4.It is easy to adjust, it can be stepless adjustment in the range of 10% and 100%, with high efficiency and significant power saving under partial load;

5.Small size, light weight, can be used as a single fully enclosed large-capacity unit;

6.Insensitive to wet strokes;

7.It is a positive pressure operation, and there is no problem of external gas intrusion and corrosion.

Cons: 1**Higher than piston type;

2.The capacity of the single machine is smaller than that of the centrifugal type, and the speed is lower than that of the centrifugal type;

3.The lubricating oil system is complex and consumes a lot of oil;

4.The noise of the large-capacity unit is higher than that of the centrifugal type;

5.High machining accuracy and assembly accuracy are required.

Classification of screw chiller: 1. According to the different classification of screw refrigeration compressors used, screw refrigeration compressors are divided into twin screw and single screw. Twin-screw refrigeration compressors have a pair of rotors with spiral teeth that gnaw at each other and rotate in opposite directions.

The single-screw refrigeration compressor has a rotor screw with 6 spiral grooves machined on an outer cylindrical surface. On the left and right sides of the butterfly and rod are the identical planetary gears with 11 racks mounted vertically. 2. According to its condensation mode, it is divided into water-cooled screw chiller and air-cooled screw chiller.

3. According to the sealing structure of the compressor, it can be divided into open type, semi-closed type and fully enclosed type. 4. According to the function of the air conditioner, it can be divided into single cooling type and heat pump type. 5. According to the different refrigerants, it can be divided into R134A and R22.

6. According to the structure of the evaporator, it can be divided into ordinary type and full liquid type.

Kaideli screw chiller belongs to the medium range of chillers, which has the following main advantages:

1. Compared with the piston type, the structure is simple, the moving parts are few, there is no inertia force of reciprocating motion, the speed is high, the movement is stable, and the movement is small.

2. The unit is light in weight and has a large cooling capacity in a single machine.

3. Because there is no clearance volume in the cylinder and suction and exhaust valves, it has high volumetric efficiency.

4. The screw chiller has few wearing parts, and the parts are only one-tenth of the piston type, which is reliable in operation and easy to maintain;

5. The screw hot and cold water unit is not sensitive to wet stroke, and a small amount of liquid is allowed to carry it, and there is no danger of liquid shock.

6. It is easy to adjust, and the refrigeration capacity can be adjusted steplessly through the slide valve.

However, the screw chiller also has its shortcomings, mainly in the following three aspects:

1. High processing accuracy and assembly accuracy are required.

2. The single-stage capacity is smaller than that of the centrifugal type;

3. The regulation performance under local load is poor.

Features of the components of the system of Kaideli screw chiller:

Compressor: Japanese Sanyo brand scroll compressor, excellent performance, low noise, stable operation, optional American Gulun, Taikang, Mitsubishi and other brand compressors;

Water pump: Taiwan Muchuan brand water pump, high efficiency, power saving and durability;

Heat exchanger: The heat exchanger is a device used to realize the heat exchange between cold and hot fluids, the condenser of the unit adopts a finned cold heat exchanger, and the evaporator adopts an accounting heat exchanger;

Controller: Equipped with advanced temperature control products, stable performance, man-machine dialogue interface, high control accuracy;

Pros:1The structure is simple, the moving parts are few, the wearing parts are few, only the piston type 1 10, the failure rate is low, and the life is long;

2.The circular motion is stable, there is no "surge" phenomenon during low-load operation, low noise and low vibration;

3.Compression ratios up to 20 and high EER values;

4.It is easy to adjust, it can be stepless adjustment in the range of 10% and 100%, with high efficiency and significant power saving under partial load;

5.Small size, light weight, can be used as a single fully enclosed large-capacity unit;

6.Insensitive to wet strokes;

7.It is a positive pressure operation, and there is no problem of external gas intrusion and corrosion.

Cons: 1**Higher than piston type;

2.The capacity of the single machine is smaller than that of the centrifugal type, and the speed is lower than that of the centrifugal type;

3.The lubricating oil system is complex and consumes a lot of oil;

4.The noise of the large-capacity unit is higher than that of the centrifugal type;

5.High machining accuracy and assembly accuracy are required.

The water-cooled screw chiller has many characteristics, such as the use of brand-name semi-hermetic screw compressor and electronic control components for the compressor of the unit, and the condenser and evaporator made of high-efficiency and high-quality copper tubes for heat exchange. Equipped with all kinds of safety protection devices, stable performance, low noise, long service life and simple operation; The liquid crystal display man-machine interface is adopted, the operation is simple and convenient, and the operation status is clear at a glance. The models are available with single compressor or multi-compressor combined refrigeration systems.

The compressor can automatically alternate according to the load change, balancing the operating hours of each compressor, saving energy consumption and extending the service life of the chiller. Easy energy regulation for greater energy savings at partial load. Open structure, beautiful appearance, simple structure, can check the operation of the unit at any time, simple and convenient installation and maintenance.

Water-cooled screw chillers are generally not used in home air conditioning systems, but are mostly used in manufacturing or some public places, and have played a significant role in summer refrigeration and winter heating. Users can choose the most suitable unit type according to their actual needs. The water-cooled screw chiller has a long service life, the system runs smoothly, and the later maintenance is convenient, making it a cost-effective unit.

Hello, I am glad to answer for you, the outlet temperature of the low-temperature screw chiller is -45 -110, and it can provide -45 -110 alcohol or calcium chloride aqueous solution chilled water; Binary cascade or ternary cascade screw refrigeration system is adopted. High energy efficiency ratio, stable operation and other characteristics. At the same time, it can be designed according to the requirements of use, ultra-low temperature type, anti-corrosion type, explosion-proof special industrial screw chiller, which can meet the requirements of various industries for process cold sources.

Screw chillers get their name because they use screw compressors. Its refrigeration power is larger than that of scroll chillers, and it is mainly used in chemical plants, ink printing plants, automobile manufacturing plants or air conditioning systems or other large-scale industrial refrigeration. Hope it helps, thank you.