Hitachi RWM-(H)FSN3E, Service Manual

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9 Electrical checks of
the main parts
SMGB0070 rev. 1 - 08/2011
236
9.8 Scroll compressor

Reliable mechanism for low vibrating and low sound
1. The rotating direction is definite.
2. The pressure inside of the chamber is high pressure, and the surface temperature of the chamber is 60 °C to 110 °C.

Principle of compression
1. The gas is inhaled from the inlet port at the outer frame
of the fixed scroll.
2. The gas inside of the compression space is compres-
sed toward the center of the scroll.
3. The compression space is minimum at the center of the
scroll, and the gas compressed at the maximum is dischar-
ged from the outlet port of at the center of the scroll.
4. The above procedures (suction compression dischar-
ge) is repeated continuously.
Gas
Rotating scroll
Compression
space
Fixed scroll
Suction procedure
Discharge process
Compression process