What is the difference between a closed compressor motor and a general motor?
In addition, the motor enameled wire coating should be resistant to chemical corrosion of frozen oil; the motor in addition to shell heat dissipation, but also by refrigerant flow away a part of heat
Advantages: compressor and motor are installed in a shell which is welded by welding or braze welding, and a main shaft is shared, so that the shaft sealing device is cancelled, and the size and weight of the whole compressor are greatly reduced and reduced. The outside of the casing is only welded with suction and exhaust pipes, process tubes and other (such as spray pipes) necessary pipes, input power terminals and compressor support.The hermetic compressor and motor are all mounted in a closed shell, and the weld of the upper and lower casing joints is a totally enclosed compressor. A fully enclosed compressor is provided with a motor which is used by the utility model and a main shaft is enclosed in the casing, thereby reducing the possibility of leakage without using a shaft sealing device.Small size, motor, pump integrated maintenance free, should not leak.
Open compressor: the open type is characterized by that one end of the crankshaft is exposed outside the compressor and connected with the motor through the coupling. A shaft seal device shall be provided at the exposed crankshaft to prevent leakage of refrigerant.Semi hermetic compressor: compared with the open compressor, it has the characteristics of compact structure, small size and light weight. The difference in the structure of the most obvious is that the body motor shell and the compressor is cast together, which is communicated with the inner cavity, do not need to avoid disadvantages of seal, seal leakage, and also to cool the motor winding by low temperature and low pressure refrigerant vapor inhalation, improve the cooling condition of the motor, reduce the motor power consumption, improve motor output. Besides, the coupling between compressor and motor is cancelled and the axial dimension of the unit is shortened. At present, when the cylinder diameter is less than 70mm, most of them are made of semi closed type.Fully enclosed compressor: widely used in small, automatic refrigeration and air-conditioning equipment. The structure of the hermetic compressor is that the compressor and its drive motor share a main shaft, both of which are assembled in a welded enclosed housing. This type of compressor is compact in structure, excellent in sealing and easy to use. Vibration and noise are relatively small. Because of its special structure, the compressor main parts and assembly and opening have all holes.
