Introduction to the Characteristics of Semi-hermetic and Hermetic Refrigeration Compressors

Semi-hermetic refrigeration compressor is a cold storage often need to use to the machinery and equipment, cold storage refrigeration compressor can be divided into two categories according to the structure of semi-hermetic and fully enclosed refrigeration machine. What are the characteristics of fully enclosed and semi-hermetic refrigeration compressor?

Totally hermetic compressor and motor together in a closed shell, the upper and lower casing joints welded seams for the fully hermetic compressor. Totally enclosed refrigeration compressor and the motor with a common spindle installed in the housing. So you can not use the shaft seal device to reduce the possibility of leakage.

Its advantages:

Refrigeration compressor and motor installed in a fusion welding or brazing welding shell, a common spindle, so that both the abolition of the shaft sealing device, but also greatly reduce and reduce the size and weight of the entire compressor. Only the suction and discharge pipes, process pipes and other (e.g. spray pipes) necessary pipes, input power terminals and compressor supports are welded to the exterior of the housing.

Semi-hermetic refrigeration compressor more cylinder body - crankcase overall structure form, the motor shell is often an extension of the cylinder body crankcase, to reduce the connection surface and ensure concentrically between the compressor level motor. Crank box and motor room two space by the hole connected, in order to facilitate the return flow of lubricant. The main shaft of the semi-hermetic refrigeration compressor is a crank shaft or eccentric shaft in the form of a structure. The cooling of the built-in motor is either by air or water, or by inhalation of low-temperature work vapour. And for the small power range of semi-hermetic compressors, the lubrication is often centrifugal oil supply method. Widely used in cold storage, refrigerated transport, frozen processing, display cabinets and kitchen refrigerators.

Its advantages:

Can adapt to a wider range of pressure and refrigeration capacity requirements. Higher thermal efficiency, less power consumption per unit, especially the existence of the gas valve to deviate from the design of the operating conditions more obvious. Low material requirements, more ordinary steel materials, processing is relatively easy, the cost is relatively low. More mature technology, production and use of the accumulated experience; device system is relatively simple.