A chiller is an energy-saving machine that achieves refrigeration through steam compression or absorption circulation. The full name of a chiller is a cooling water circulation machine, also known as a refrigerator, a cooling machine, a freezer, a chiller, an ice machine, a small chiller, an industrial chiller, a refrigeration unit, a low-temperature chiller, and a laser chiller. Because of its wide use in various industries, it has countless aliases depending on the industry.

Understanding of direct and indirect refrigeration of chillers

Principle of water-cooled direct refrigeration

The water in the bottom basin of the cooling tower is transported to the condenser of the chiller through a water pump to cool the condenser, and then flows back to the cooling tower to spray down. The fan on the top of the cooling tower cools the water and then flows back to the bottom basin of the cooling tower, and it runs in a cycle. The condenser dissipates heat while the refrigerant inside is liquefied, and then flows into the evaporator for evaporation. When evaporating, it absorbs heat, thereby cooling the sulfuric acid (tank liquid) in the evaporator. The cooled sulfuric acid is transported to the electroplating (oxidation) tank through a water pump, and this is a cycle.

Refrigeration principle of water-cooled indirect freezing in the electroplating (oxidation) industry

The water in the bottom basin of the cooling tower is transported to the condenser of the small chiller through a water pump to cool the condenser. When it flows back into the cooling tower and sprays down, the water is cooled by the fan on the top of the cooling tower, and then flows back to the bottom basin of the cooling tower, and this cycle repeats. The condenser dissipates heat while the refrigerant inside is liquefied, and then flows into the evaporator in the water tank for evaporation. When evaporating, it absorbs heat, thereby cooling the water in the water tank. The cooled water is transported to the heat exchanger (separated in the middle, water on one side and sulfuric acid on the other side) through a water pump, and then the sulfuric acid is cooled through the heat transfer process, and this is a cycle. The advantages of this product are easy installation, longer service life than direct freezing, and acid and alkali are not easy to corrode the chiller.

Technical analysis: In what fields are chillers used

1. Chillers are used to support medical laser equipment. The unique water quality treatment characteristics of this type of chiller make it an ideal choice for supporting medical laser equipment and supporting laboratory equipment. This series of chillers are also widely used in atomic absorption spectrometers, fermentation devices, reactors, electrophoresis instruments, etc.

When using the chiller, you must pay attention to: first, liquid medium should be added to the tank before use, secondly, the working power supply should be determined according to the model of the machine, the power supply power should be greater than or equal to the total power of the instrument, and the power supply must be well grounded. Thirdly, the chiller should be placed in a dry and ventilated place, and then the side that is on the side away from the obstacle is 400mm away. Finally, after using the chiller, all switches are turned off, the power plug is connected, and the liquid in the tank is sucked dry with a suction ball and a leather hose.

2. The chiller can be used to support experimental condensation equipment. Such as rotary evaporators, distiller, condenser tubes, with the characteristics of temperature controllable, stable temperature, high condensation efficiency, can effectively improve the recovery rate. At the same time, its fluid purification function can avoid the blockage of circulation pipes and the growth of microorganisms.

3. The chiller is used in supporting semiconductor laser equipment. Due to its special structure, semiconductor laser equipment has high requirements for water quality.

4. The chiller can be used in supporting vacuum equipment. This type of chiller also meets the needs of high-quality vacuum equipment, such as molecular pumps, small vacuum coating machines, etc.