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Water chillers are widely used, such as plastics industry, metal processing, chemical processing, etc. There are many types of chillers. Choosing a chiller that suits you, understanding the types of chillers and maintenance knowledge can help your production. The following is to share with you the classification and daily maintenance of chillers.
1. Classification of chillers
1. According to the packaging form: there are two types of open and sealed chillers.
(1) open
Generally, it will be installed outside the workshop, which is convenient for maintenance and not beautiful enough.
(2) Sealed
Box structure, easy to install, easy to use, beautiful appearance, more popular among the current customer base.
2. According to the condensation method: there are mainly two types: water-cooled chiller and air-cooled chiller.
(1) Water-cooled type
The chiller is externally connected with cooling water to take away the heat of the refrigerant in the condenser.
(2) Air-cooled type
The chiller is equipped with a cooling fan to take away the heat of the refrigerant in the condenser.
3. According to the type of evaporator: there are two types: submerged water type and shell tank type.
(1) submerged type
The evaporator is immersed in the water tank to realize refrigeration, and the water pump draws water from the water tank to realize circulation.
(2) shell tank type
The evaporator is made into a long cylindrical tank, and the water pump pumps water from the water tank into the evaporator to achieve refrigeration
4. According to the type of compressor: there are three types: piston chiller, screw chiller and centrifugal chiller.
(1) piston cooling
Piston-type refrigeration compressors are used, which have the advantages of multi-cylinder, high speed, adjustable energy, high thermal efficiency, and are suitable for a variety of refrigerants, etc., but the structure is relatively complex, there are many wearing parts, the maintenance period is short, there is pulse vibration and the running stability is poor. and other shortcomings.
(2) screw type
Using imported brand screw refrigeration compression, simple structure, less wearing parts, small size, light weight, large compression ratio, high cooling capacity, short maintenance cycle, stable operation and long service life.
(3) centrifugal
Using a centrifugal compressor, using electricity as a power source, the freon refrigerant evaporates in the evaporator to absorb the heat of the refrigerant water for refrigeration.
5. According to the temperature, it can be divided into ordinary chillers (5-35 degrees), low-temperature chillers (-20--35 degrees) and low-temperature oil chillers (-60 degrees).
Different industries have different requirements for the use of chillers, and various types of chillers can meet the purchase needs of various industries.
Second, the daily maintenance of the chiller
1. It is recommended to use distilled water or purified water. Tap water has high calcium and magnesium content, and the water quality is relatively hard, which is prone to sediment.
2. Pay attention to the ventilation of the environment and the air inlet and outlet of the chiller without cover to ensure smooth heat dissipation of the machine.
3. Ensure power frequency adaptation and normal power supply, including the stability of voltage and current.
4. Regularly check and replace the cooling water to ensure that the chiller runs with water.
5. Carry out oil maintenance regularly to ensure the smooth operation of mechanical axles and other structures.
6. Regularly remove and wash the dust-proof net and condenser of cold water to ensure the cooling effect.
7. Regular data recording, the data can intuitively reflect whether the mechanical operation is abnormal or not, and if the data is abnormal, it can be fed back in time.
Introduction
LSW-series water-cooled chillers is popular for large cooling capacity project,. Equipped with pump tanks, high efficiency Scroll compressors, tandem and dual circuit configurations, stainless steel plate evaporator and condensers as well as shell and tube heat exchangers are available, thermostatic expansion valves, filter dryers and sight glasses. Portable chillers are fully packaged and can be converted to a central system. Chillers come packaged with insulated pumps and tanks with level sight glass. Options include: water regulating pressure control, various pump configurations, water makeup, oversized pumps and reservoirs, and potable water isolation heat exchanger systems.
