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REFRIGERANT SYSTEM [(US)]

REFRIGERANT SYSTEM [(US)]

SM2565455

id0711000017x1



Outline

• The refrigerant system cools the evaporator using the cooling cycle to cool and dehumidify the air passing through the evaporator.



Function

• The refrigerant system changes the pressure and temperature of the charged refrigerant and cools the evaporator at the refrigerant cycle in which the refrigerant is liquefied or atomized.



Structure/Construction


Structural view

SKYACTIV-G 2.0, SKYACTIV-G 2.5
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Operation

1.When there is no energization to the stator (A/C relay off) (1), the pressure plate and A/C compressor pulley do not engage.

2.When there is energization to the stator (A/C relay on) (2), the magnetic clutch of the stator operates and the pressure plate and A/C compressor pulley engage (3).

3.The engine power (4) from the drive belt is transmitted (5) to the A/C compressor via the pressure plate from the A/C compressor pulley.
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4.When the magnetic clutch engages, the swash plate in the A/C compressor rotates. The piston moves reciprocally by the rotation of the swash plate, compression in the cylinder is generated, and refrigerant intake, compression, and discharge are performed.

5.When the piston of the A/C compressor moves downward, the suction valve opens and low temperature and low pressure gaseous refrigerant is introduced (6) into the cylinder.

6.When the piston of the A/C compressor reaches the BDC, refrigerant charging is completed (7) and the suction valve closes.

7.When the piston of the A/C compressor moves upward, the gaseous refrigerant in the cylinder is pressurized (8).

Note
• Because the liquefying temperature is low, the low pressure gaseous refrigerant is pressurized by the A/C compressor, which raises the liquefying temperature.

8.The compressed gaseous refrigerant presses open the discharge valve and the A/C compressor discharges (9) the high-temperature and highly pressurized gaseous refrigerant from the cylinder.

9.The high temperature, high pressure gaseous refrigerant is sent (10) to the condenser.
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10.The high temperature, high pressure gaseous refrigerant is circulated (11) inside the side of the condenser.

11.When the airflow from the exterior contacts the condenser fins, the heat in the circulating refrigerant is released through heat exchange, and the once high temperature, high pressure gaseous refrigerant becomes a low temperature, high pressure liquid refrigerant (12).

12.The low temperature, high pressure liquid refrigerant is purified and dehumidified by the receiver/drier and sent to the expansion valve (13).
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13.The low temperature, high pressure liquid refrigerant is depressurized by the expansion valve and converted to a mist which is sent (14) to the evaporator.

14.The liquid refrigerant, now in a mist state, is atomized in the evaporator and becomes (15) a low temperature, low pressure gaseous refrigerant, and the evaporator is cooled by the surrounding heat being drawn out (latent heat) when the liquid is atomized.

15.The expansion valve adjusts the liquid refrigerant flow volume to the evaporator according to the gaseous refrigerant temperature (16) circulating from the evaporator to the condenser.

16.The low temperature, low pressure gaseous refrigerant is sent to the A/C compressor and circulates (17) the refrigerant cycle.
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17.The airflow passing through the cooled evaporator is cooled via heat exchange, the moisture in the air is condensed in the evaporator, and dehumidified.
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