A/C UNIT CONSTRUCTION/OPERATION


BHE071161130T01

Construction

• An A/C unit with integrated cooling and heater units has been adopted.

1
Evaporator
2
Heater core
3
Expansion valve
4
Air mix door
5
Airflow mode door
6
Evaporator temperature sensor
7
Power transistor (full-auto air conditioner), resistor (manual air conditioner)
8
Air mix actuator
9
Air flow mode actuator
10
Airflow mode main link
11
A/C amplifier

Air Mix Door Operation

• The air mix actuator, installed in the A/C unit, controls HOT or COLD positions, depending on the position of the temperature control dial. As a result, the airflow distribution changes, and the airflow temperature is controlled.

1
Airflow from blower unit
2
Heater core
3
Evaporator
4
Air mix door
5
COLD
6
HOT

Airflow Mode Door Operation

• The airflow mode actuator move to the VENT, BI-LEVEL, HEAT, HEAT/DEF, or DEFROSTER position, depending on the position of the airflow mode selector switch. As a result, the airflow mode changes.

1
Airflow from blower unit
2
Air mix door
3
Airflow mode door
4
Evaporator
5
Heater core
6
To center vent and side vent
7
To front heat
8
To rear heat
9
To defroster and side demister
10
VENT
11
BI-LEVEL
12
HEAT
13
HEAT/DEF
14
DEFROSTER

Airflow Distribution

L.H.D.

AIRFLOW MODE

AIRFLOW RATE (%)

VENT

HEAT

DEFROSTER

DRIVER-SIDE

PASSENGER-SIDE

DRIVER-SIDE

PASSENGER-SIDE

DRIVER-SIDE

PASSENGER-SIDE

SIDE

CENTER

CENTER

SIDE

FRONT

REAR

FRONT

REAR

SIDE

CENTER

CENTER

SIDE

VENT
25
25
25
25
-
-
-
-
-
-
-
-
BI-LEVEL
12.5
12.5
12.5
12.5
16.25
8.75
16.25
8.75
-
-
-
-
HEAT
7.5
-
-
7.5
21.125
11.375
21.125
11.375
2.4
7.6
7.6
2.4
HEAT/DEF
7.5
-
-
7.5
14.625
7.875
14.625
7.875
4.8
15.2
15.2
4.8
DEFROSTER
10
-
-
10
-
-
-
-
9.6
30.4
30.4
9.6

R.H.D.

AIRFLOW MODE

AIRFLOW RATE (%)

VENT

HEAT

DEFROSTER

DRIVER-SIDE

PASSENGER-SIDE

DRIVER-SIDE

PASSENGER-SIDE

DRIVER-SIDE

PASSENGER-SIDE

SIDE

CENTER

CENTER

SIDE

FRONT

REAR

FRONT

REAR

SIDE

CENTER

CENTER

SIDE

VENT
25
25
25
25
-
-
-
-
-
-
-
-
BI-LEVEL
12.5
12.5
12.5
12.5
16.25
8.75
16.25
8.75
-
-
-
-
HEAT
-
-
-
-
26.975
14.525
26.975
14.525
2.04
6.46
6.46
2.04
HEAT/DEF
-
-
-
-
16.25
8.75
16.25
8.75
6
19
19
6
DEFROSTER
-
-
-
-
-
-
-
-
12
38
38
12