Unit 23 Compressors Flash Card (CRF)-Mr.Graham

Front

compressor

Back

A vapor pump that pumps vapor (refrigerant or air) from one pressure level to a higher pressure level.

Front

absolute pressure

Back

Gauge pressure plus the pressure of the atmosphere, normally 14.696 at sea level at 70° Fahrenheit .

Front

screw

Back

A form of positive displacement compressor that squeezes fluid from low-pressure area to a high-pressure area, using screw-type mechanisms.

Front

centrifugal

Back

A compressor used for a large refrigeration system that uses centrifugal force to accomplish compression. It is not a positive displacement, but it is similar to a blower.

Front

hermetic

Back

A motor and compressor that are totally sealed by being welded in a container.

Front

open

Back

A compressor with and external drive.

Front

connecting rods

Back

A rod that connects the piston to the crankshaft.

Front

crankshaft

Back

In a reciprocating compressor, the crankshaft changes the round-and-round motion into the reciprocating back-and-forth motion of the pistons using off-center devices called throws.

Front

eccentric

Back

An off-center device that rotates in a circle around a shaft

Front

piston

Back

The part that moves up and down in a cylinder.