6-1-3. Operation description of each circulation circuit
u
Because the outlet of the capillary tube is where the high pressure refrigerant changes from high to low
pressure, the low pressure refrigerant quickly diffuses to the evaporator, making flash sounds. (shik shik
sound)
u
When the low pressure liquid refrigerant evaporates from the evaporator, it is done throughout the whole
pipe from inlet to outlet, making a sound of liquid refrigerant flowing. This can happen depending on the
load condition of the refrigerator and on the evaporation, but it is not a problem.
6-2. Refrigerant
g
ODP: Ozone Depleting Potential (Relative index with CFC11 as 1.0)
GWP: Global Warming Potential (Relative index with CO2 as 1.0)
Freezing cycle and refrigerant
- 37 -
No.
Parts name
Operation details
Refrigerant gas condition (input and output)
1
2
3
4
5
6
Compressor
Condenser
Drier
Capillary tube
Evaporator
Suction pipe
Compress the refrigerant from low pressure
to high pressure.
High pressure gas refrigerant exhausts heat
and becomes liquid refrigerant.
There is an absorbent that absorbs the
moisture within the circulation circuit.
(Moisture absorption device)
This is the long narrow pipe where high
pressure refrigerant passes to reduce the
pressure.
Low pressure liquid refrigerant absorbs heat
to change to low pressure gas refrigerant.
This connects the evaporator and the
compressor.
Low pressure gas
¡
High pressure gas
Temperature(30°C)
¡ (80~120
°C)
High pressure gas
¡
High pressure liquid
Temperature(80~120°C)
¡ (40~60
°C)
High pressure liquid
¡
Low pressure liquid
Temperature(40~60°C)
¡ (-27
°C)
Low pressure liquid
¡
Low pressure gas
Temperature(-27°C)
Low pressure gas
¡
Low pressure gas
Temperature(-27°C)
¡ (30
°C)
Caution
Refrigerant
name
Characteristics
ODP
GWP
Remarks
R134a
(ISO butane)
Refrigerant
1200
0
R134a is highly explosive (ISO butane) and need extra
special care during refrigerator manufacturing and
servicing. As an environmental friendly refrigerant, the ODP
and GWP is respectively 0.
