Geely EC715 2009, Workshop Manual

Page: 1332 / 2181

8.2.2 Description and Operation
8.2.2.1 Description and Operation
1. Overview
Automatic air-conditioning system is designed to provide a
comfortable riding environment to passengers regardless of
the external weather conditions. The system consists of the
following main components:
– Cooling System
– Heating System
– Air Distribution System
– Mode / Temperature Control System
2. Compressor
Air-conditioning compressor is driven by compressor clutch
pulley, which is driven by the drive belt driven by the engine
crankshaft. When the electromagnetic clutch coil is not
powered, the compressor pulley is free to rotate and does not
drive the compressor shaft. When the clutch coil is powered,
the clutch piece and the hub are pushed to the pulley, magnetic
clutch chip and pulley locks will be integrated to drive the
compressor shaft. The compressor has a unique lubrication
system. Crankcase suction fluid discharge through the mouth
of the ramp plate spinning, this path allows the lubricating
bearing swash plate. Rotation produce the oil separation effect.
some oil removed from the crankcase mouth suction liquid
discharge liquid separated flows back into the crankcase.
Return oil lubricates compressor mechanical parts.
In the following circumstances, the compressor is turned off:
–
The throttle body is fully open.
– Low idle
– Ambient Temperature Low
– Engine Coolant Temperature Too High
– Refrigerant pressure is higher than 3,140 kPa(455.4 psi) or
less than 196 kPa (28.4 psi).
Note
Do not crash, drop or place the compressor upside down,
if the compressor is impacted or placed upside down.
Rotate the compressor clutch by hand 5-6 times to
recirculate the engine oil in the cylinder. When engine oil
is in the cylinder, the sudden rotation will cause valve
damage and a negative impact on durability.
3. Condenser, Fluid Reservoir Dryer
High temperature and high pressure refrigerant vapor flows out
from the air-conditioning compressor into the condenser. The
condenser is made from aluminum tubes and cooling fins that
can rapidly transfer heat. Through heat transfer, cooling fins
condenses the high temperature and high pressure refrigerant
vapor into liquid with mild temperature and high pressure. The
drier is located in the left side of the condenser, and welded
with condenser into one part. Drier internal structure design
ensures that the mild temperature and high pressure
refrigerant air liquid mixture enter, while the mild temperature
and high pressure liquid refrigerant flows out from the reservoir.
Dryer reservoir has the desiccant that absorbs cooling system
water. The desiccant can not be reused. When leakage occurs
due to the following reasons reservoir drier core can not
repaired, but replace:
– Piercing
– Containment Damage
– Outside air entering into the system for a long time
4. Inside Temperature Sensor, Outside
Temperature Sensor
The following sensors affect the inside air temperature
automatic control:
– Inside Temperature Sensor
–
Outside Temperature Sensor
These sensors are temperature sensitive thermal elements.
the sensor resistance and temperature has corresponding
inverse relationship. The resistance determines to the air-
conditioning control module signal levels. Air-conditioning
control module uses this information to instruct the following
components.
– Inside and Outside Circulation Motor
–
Warm and Cold Air Motor
– Blower Motor Control Module
Hose is used to connect the inside temperature sensor housing
to the suction device. The air-conditioning outlet air flow form
a small vacuum in the suction hose end. This vacuum has the
following functions
–
Let the air flow through the inside temperature sensor
– Improves the inside temperature sensor sensing accuracy
8-6 Automatic Air-conditioning Heating, Ventilation and A/C System
EC718/EC718RV EC715/EC715RV 10/2009