Outside temperature sensor is located in the vehicle front grille
below the front bumper area. Air-conditioning control module
uses this sensor to learn the surrounding air temperature
information, and display the outside temperature in the
instrument cluster.
5. Ambient and Sun Light Sensor
Ambient and sun light sensor is located in the instrument panel
upper middle panel. ambient and sun light sensor is light
energy sensor that measure sunlight generated heat, providing
additional compensation parameters to air-conditioning control
module. Air-conditioning control module in real time
automatically adjusts the air-conditioning air volume and cold /
hot air mixture ratio, according to light intensity, the vehicle
status and the vehicle air-conditioning demand conditions, so
that all occupants feel comfortable.
6. Inside Air-conditioning Assembly
Inside air-conditioning assembly is located in instrument panel,
and consists the blower motor, blower motor control module,
air-conditioning filter, heater core, evaporator, expansion
valve, warm and cold air direction control motor and various air
deflection damper, ventilation duct.
A. Blower Motor
Note
Do not place the blower motor on the blower motor fan
wheel.
Do not touch the fan wheel blades to prevent damage.
Blower consists of the following components:
–
Permanent Magnet Motor
–
Mouse-cage Fan
Blowers operate at different speeds depending on the changes
in speed by the blower motor speed control device controlled
by the blower motor control module. If the user selects the
maximum air-conditioning mode, the vast majority of air into
blower is from the passenger compartment (inside circulation).
Under most operating conditions, outside air entering the
vehicle in the following ways:
–
Blower motor draws outside air.
–
Vehicle forward movement draws the outside air.
Blower motor blows air along the following lines:
–
Through the evaporator core
–
Through heater core
–
Into the passenger compartment
B. Heater Core
Heater core is the main heating system component. Heater
Core is located inside the air-conditioning. Whenever the
engine runs, the engine coolant from the engine is pumped into
the heater core. Heater core will transfer the engine coolant
heat to the air flowing through the heater core body. Heater
core has specific inlet and outlet air pipes. To remove the
heater core body, the heater core warm pipe must be
completely discharged. For service, the heater core warm pipe
must already be installed. Heater core is equipped with a
temperature sensor. The sensor send the heater core surface
temperature signal to the air-conditioning control module,
providing more compensation parameters.
C. Evaporator and Expansion Valve
Evaporator is located in the left hand side of the air-conditioning
assembly. To remove and install the evaporator and expansion
valve, the air-conditioning assembly must be removed first.
When removing, the evaporator refrigerant piping must be
completely discharged. When servicing, evaporator with
separate refrigerant pipelines must already be installed.
Expansion valve is connected to the evaporator, installed in
one end of the evaporator, located in the evaporator inlet.
Expansion valve one end is connected to the air-conditioning
compressor inlet and outlet pipes, the other is connected to the
evaporator inlet and outlet pipes. Within the pipeline, the high
pressure refrigerant is regulated to low pressure refrigerant and
flows to the evaporator.
Expansion valve changes the location according the air-
conditioning lower pressure limit and the upper pressure limit.
Evaporator cools the air and removes the moisture from the air
before the air enters into passenger compartment. Following
procedures happen in the evaporator:
–
Low-voltage low-temperature liquid / vapor refrigerant
entering into the evaporator.
–
Refrigerant flows through the evaporator.
–
Refrigerant evaporation.
–
Evaporated refrigerant absorbs heat from the air flowing
through the evaporator.
–
Low-pressure low temperature refrigerant enters into the
evaporator, steam leaves the evaporator.
Heating, Ventilation and A/C System
Automatic Air-conditioning
8-7