Geely Emgrand X7. Manual part — 434

7. Max.refrigerate

(MAX

A/C)

The controller is demanded for operating in the maximum refrigerating mode.

Rotate the mode knob to "MAX A/C", the control module will control by the following states:

–

Mode valve: Mode valve is in blowing face position

– A/C:

On

–

Inside and outside circulation: Inside circulation

–

Bleed door valve: full cooling mode

Notes:

When regulating the control mode knob to revolve from the position "Max A/C", electric

The A/C system performs the previous working condition.

8.3.3.2 Power A/C work principle

1. Refrigeration system work principle

NL08-2024b

The compressor is driven by the belt via the engine to extract the gaseous refrigerant from the evaporator and
compress it. The refrigerant is heated to 83°C to 110℃ at pressures up to 15 bar (1.47 MPa), and high-pressure
superheated refrigerant is conveyed to the condenser. At this time, heate in the refrigerant is carried away by the
air conveyed to the radiator fins, so the refrigerant is cooled down and is retained in the condenser due to the
dissipitation of such heat. Then, the refrigerant cooling to 53℃ and 70℃ is transmitted to the refrigerant storage
dryer under the high pressure. As an intermediate storage, the store fluid dry filters all moisture contained in the
refrigerant. The dry undercooling refrigerant is delivered to the entrance of the expansion value as a function of
the pressure and temperature in the evaporator; the expansion valve performs throttle and pressure reduction
control on the flow of the refrigerant entering into the evaporator, the pressure of the fog-like refrigerant from the
expansion valve is 2bar, the temperature is dropped to 0℃ to 2℃, and the fog-like refrigerant is heated to
evaporate in the evaporator. At last, the heat in the air is completely absorbed by the refrigerant in the evaporator
when entering the passenger compartment; therefore, when the air is cooled, the moisture mingled in the air is
condensed on the surface of the evaporator core. The low-pressure refrigerant air flow from the evaporator is
flowed to the upper opening of the expansion valve, the refrigerant pressure at this time is 2 bar and the
temperature is raised to 5℃ to 8℃. However, the compressor extracts the superheated refrigerant steam herein.

2. Heating

system

work

principle

Superheated vapor

Gas-liquid mixed mist

Evaporator

Supercooled liquid

Expansion valve

Superheated vapor

Compressor

Condenser

Fl

ui

d

reser

voi

r

dr

ye

r

Supercooled

liquid

Superheated vapor-saturated vapor-condensation-saturation

liquid-supercooled liquid

1735

NL08-2025b

When the automatic A/C system is in the heating mode, the temperature control motor converts the temperature
control device into the heating position, so that the air entering the heater core plays the following roles in

–

Part or all air flow passes by to heating core

– Generate

heat

transmission

Any air needing not to heat will be mixed with the heated air before entering the passenger cabin to obtain the
corresponding mixed air at proper temperature.

The state of the engine coolant is the key factor that whether the heating system is working normally.

3. Venting control System work principle

NL08-2026b

Various locations on the ventilation control system can enable the mode valve to mix or induct cold air and hot air
through the air duct; and the outside air through the A/C system is transmitted to the passenger compartment via
the air duct system and the air outlet.

Air flow is changed in the following mode:

Air supply to face-supply air through instrument panel air outlet

Both-way-air supply through air outlet and that of floor

Air supply to feet-supply air through the floor air outlet

Hot-water inlet

Warm water outlet

Outer new

wind inlet

Inside

circulation

windinlet

BlowERe

r

Natural

wind inlet

Heating core

Evaporation

core

Hot-
wind
outlet

Wind

inlet

1736

Mixture-air supply through floor and front air window outlet

Defrosting-front air window air outlet supplies air.

1737

8.3.4 Component position

8.3.4.1 A/C system element layout location plan

5

6

7

8

4

3

1

2

NL08-2027b

Legend

1. A/C

control

Panel

2. Floor vent duct.

3. A/C

main

host

4. Dryer

5. Condenser

6. Compressor:

7. A/C low pressure pipe

8. AC high pressure pipe.

1738