LG GR-K192AF Service Manual - Page 32

Refrigerant

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Freezing cycle and refrigerant 6-1-3. Operation description of each circulation circuit No. Parts name 1 Compressor Operation details Compress the refrigerant from low pressure (0kg/cm2) to high pressure (8-12kg/cm2). Refrigerant gas condition (input and output) Low pressure gas-->High pressure gas (0kg/cm2) (8~12kg/cm2) Temperature (30°C) ¡ (80~120°C) 2 Condenser & hot line High pressure gas refrigerant exhausts heat pipe and becomes liquid refrigerant. High pressure gas-->High pressure liquid (8~12kg/cm2) (8~12kg/cm2) Temperature (80~120°C) ¡ (40~60°C) 3 Drier 4 Capillary tube 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. High pressure liquid-->Low pressure liquid (8~12kg/cm2) (0kg/cm2) Temperature (40~60°C) ¡ (-27°C) 5 Evaporator Low pressure liquid refrigerant absorbs heat to change to low pressure gas refrigerant. Low pressure liquid-->Low pressure gas (0kg/cm2) (0kg/cm2) Temperature (-27°C) 6 Suction pipe This connects the evaporator and the compressor. Low pressure gas-->Low pressure gas (0kg/cm2) (8~12kg/cm2) Temperature (-27°C) ¡ (30°C) Caution 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 Refrigerant Characteristics ODP GWP Remarks Because it does not include chloride, which cause ozone R134a destruction, it will not destruct the ozone and has a low 0 1200 Refrigerant (HFC-134a) GWP compared to the existing R12 (GWP: 15300). g ODP: Ozone Depleting Potential (Relative index with CFC11 as 1.0) GWP: Global Warming Potential (Relative index with CO2 as 1.0) - 32 -

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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
- 32 -
No.
Parts name
Operation details
Refrigerant gas condition (input and output)
1
2
3
4
5
6
Compressor
Condenser & hot line
pipe
Drier
Capillary tube
Evaporator
Suction pipe
Compress the refrigerant from low pressure
(0kg/cm
2
) to high pressure (8-12kg/cm
2
).
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
(0
kg/cm
2
) (8~12
kg/cm
2
)
Temperature
(30°C)
¡
(80~120°C)
High pressure gas-->High pressure liquid
(8~12
kg/cm
2
) (8~12
kg/cm
2
)
Temperature
(80~120°C)
¡
(40~60°C)
High pressure liquid-->Low pressure liquid
(8~12
kg/cm
2
) (0
kg/cm
2
)
Temperature
(40~60°C)
¡
(-27°C)
Low pressure liquid-->Low pressure gas
(0
kg/cm
2
) (0
kg/cm
2
)
Temperature
(-27°C)
Low pressure gas-->Low pressure gas
(0
kg/cm
2
) (8~12
kg/cm
2
)
Temperature
(-27°C)
¡
(30°C)
Caution
Refrigerant
Characteristics
ODP
GWP
Remarks
R134a
(HFC-134a)
Refrigerant
1200
0
Because it does not include chloride, which cause ozone
destruction, it will not destruct the ozone and has a low
GWP compared to the existing R12 (GWP: 15300).