Disadvantages: many spare parts, many wearing parts, complicated and frequent maintenance, high maintenance cost, low compression ratio, small single-machine refrigeration capacity, poor single-machine head adjustment performance under partial load, cylinder unloading adjustment, stepless adjustment, up-and-down reciprocating motion, large vibration and large weight index of unit refrigeration capacity.
Note that there should be no high wall in front of the cooling fan in air cooled chiller, otherwise the chimney will block the exhaust passage and affect the cooling effect.
Extended data:
Precautions:
1. Before starting the water chiller, close the water inlet valve of the condenser of the unit without running to prevent water from escaping.
2. Open the inlet and outlet valves on the condenser of the unit to be operated (usually, the outlet valve is always open, and the inlet valve opens and closes the condenser and evaporator as required), turn on the corresponding cooling water pump, and adjust the inlet and outlet pressure of the condenser to about 68.6kPa (0.7 kg/cm:) (it is best to reduce the pressure drop to overcome the pipeline resistance).
3. If the pointer of the pressure gauge at the inlet and outlet of the condenser swings too much, it means that there is air in the cooling water system, and it needs to be exhausted until the pressure gauge indicates that it is normal to continue the next operation. Moreover, in operation, no matter how many units are started, there is one cooling water pump to one main engine.
Baidu encyclopedia-air-cooled chiller