Operating mechanism and maintenance of chiller

How does the chiller work?

The chiller is a very common word. Generally, there are other nickers such as refrigerators, coolers, chillers, etc., which are widely used in various industries. There are several classifications under the chiller, such as water cooling. Air-cooled chiller, then everyone knows how the water-cooled chiller works? Let's look down with the water-cooled chiller.

The chiller can be generally divided into water-cooled and air-cooled according to the form of refrigeration. Technically, the water-cooling energy-efficiency ratio is higher than the kcal/h of 300 to 500; in terms of price, the water cooling is much lower than the air cooling; In the installation, the water cooling needs to be included in the cooling tower before use, and the air cooling is movable without additional assistance. However, the air-cooled chiller only relies on the fan to dissipate heat, which requires environmental requirements: for example, ventilation, humidity, and temperature cannot be higher than 40 ° C, air pH value...

principle

The air-cooled chiller uses a shell-and-tube evaporator to exchange heat between the water and the refrigerant. The refrigerant system absorbs the heat load in the water, and after the water is cooled to produce cold water, the heat is brought to the finned condenser through the action of the compressor. Then, the cooling fan is lost to the outside air (wind cooling); the water-cooled chiller uses the shell-and-tube evaporator to exchange heat between the water and the refrigerant, and the refrigerant system absorbs the heat load in the water, so that the water is cooled and cold water is passed. The function of the compressor takes heat to the shell-and-tube condenser, which exchanges heat between the refrigerant and the water, so that the water absorbs heat and then dissipates heat through the water pipe to the outside cooling tower (water cooling).

maintenance

In the normal operation of water-cooled chillers, it is inevitable that dirt or other impurities will affect the cooling effect. Therefore, in order to extend the service life of the mainframe group and achieve a better cooling effect, regular maintenance and maintenance work should be done to ensure the quality of the chiller operation and improve production efficiency. The details are as follows:

1. Regularly check whether the voltage and current of the chiller are stable, and whether the compressor running sound is normal. When the chiller is working normally, the voltage is 380V, and the current is in the range of 11A-15A.

Second, regularly check whether the chiller refrigerant has leakage: refer to the parameters displayed on the front panel of the main unit. According to the temperature (winter, summer) temperature changes, the chiller pressure display is also different. When the chiller is working normally, the high pressure shows 11-17kg, and the low pressure shows 3-5kg.

3. Check whether the cooling water system of the chiller is normal, whether the cooling tower fan and the sprinkler shaft are working well, and whether the hydration of the built-in water tank of the chiller is normal.

4. When the chiller is used for six months, it should be cleaned systematically and cleaned once a year. The main cleaning parts include: cooling tower, cooling water pipe and condenser part to ensure better cooling effect.

5. When the chiller is not used for a long time, the circuit breakers such as the water pump, the compressor and the total power supply of the cooling tower should be turned off in time.

Fiberglass Grating

Fiberglass Grating