Movincool CLASSICPLUS14 サービスマニュアル

Operation Section

19

•The lubrication system is comprised of a hollow 

shaft, an oil scraper mounted at the end face,

hollow shaft, a shaft journal (shaft bearing),

and the lubrication groove for the shaft journal.

The lubrication groove is wider than the oil

hole. When the shaft turns, oil is scraped

upward by the oil scraper along the inside

diameter of the hollow shaft. The oil is fed

through the oil hole by centrifugal force, then

supplied to the lubrication groove for each

shaft journal, lubricating the bearing. In this

lubrication system, oil enters into each bearing

separately and returns to the oil reservoir. This

system effectively prevents bearing

temperature increases, and offers high

reliability. In addition, the specially treated

shaft journal keeps the bearing from being damaged during high temperature operation.

• The condenser is a heat exchanger with copper tubes that are covered with thin aluminum

projections called plate fins.

• Heat is given off and absorbed by air being pulled across the condenser fins by the centrifugal

fan and then expelled through the exhaust air duct.

• The capillary tube is a long thin tube utilizing

line flow resistance to serve as an expansion

valve. The length and the inner diameter of the

capillary tube are determined by the capacity of

the refrigeration system, specified operating

conditions, and the amount of refrigerant. The

capillary tube causes the high pressure, high

temperature liquid refrigerant sent from the

condenser to expand rapidly as the refrigerant

is sprayed out through the fixed orifice in the capillary tube. As a result, the temperature and

state of the refrigerant becomes low and mist-like respectively, causing it to evaporate easily.

I001680

Oil Feed Groove

Oil Hole

Oil Scrapper

Roller

Rotor

Cylinder

Hollow Shaft

Eccentric Shaft

I001887

High Temp./High Pressure
Liquid Refrigerant

Low Temp./Low Pressure

Gas and Liquid Mixture