09. ACR-104 UNIT 23 FLASH CARDS

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°F.

Front

Screw

Back

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

Front

Centrifugal

Back

A compressor used for large refrigeration systems that uses centrifugal force to accomplish compression. It is not 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 an 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.