Chery A15. Manual - part 130

 

AIR CONDITIONING SYSTEM OVERVIEW 

Based on its function, the Chery A15LHD air 
conditioning unit may be divided into such five 
basic components as the refrigeration system, 
heating system, ventilation system, control system 
and air purification system. 

1. Refrigeration system     It is available to cool 
the air inside the vehicle based on the refrigeration 
principle of vapor compression refrigerator. The 
temperature of evaporator as the cold source is 
lower than the dew-point temperature of air, so the 
refrigeration system also play the role of 
dehumidification and air purification. The 
refrigeration system of Chery's electronic fuel 
injection type engine adopts the coolant R134a. As 
shown in the figure, the refrigeration system 
mainly consist of the compressor, condenser, 
expansion valve, evaporator and etc. In the 
evaporator, the coolant fluid absorbs the heat from 
the air inside vehicle and is gasified to the 
low-pressure, low-temperature coolant vapor, and 
then is inhaled into the compressor. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Compressor

Condenser and Circuit 

Warm air radiator

A/C Control System

Evaporator 

 

 

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The coolant vapor will be compressed by the compressor as the high-temperature, 
high-pressure gas which enters into the condenser. In the condenser, the coolant is cooled by 
the ambient air, and condensed into the fluid after emitting its heat outwards, then the 
moisture content is filtered and removed from the fluid via the fluid reservoir. The 
high-temperature, high-pressure coolant fluid is throttled down through the expansion valve 
(installed in the inlet pipe of evaporator) to reduce its pressure and temperature, and then the 
fluid enters into the evaporator. The low-temperature and low-pressure coolant fluid also 
absorb the heat from the inside of vehicle, and gasifies again to the low-temperature and 
low-pressure coolant vapor, and then is inhaled into the compressor. In such a manner, the 
coolant cycles recurrently to make the indoor temperature of vehicle reduce. The pipelines 
for coolant are shown in the figure below: 

2. Heating system   It adopts the engine coolant as the heat source and introduces the 
coolant into the radiator located at the compartment to heat the indoor air via the blower, and, 
at the same time, it is also used to defrost and defog the front windscreen.Chery A15LHD’s 
air conditioning unit adopts the reheating mixed type unit, the heating system of which is 
used not only to individually heat the circulating air from the inside of vehicle or the fresh air 
from the outside, but also to firstly cool these two kinds of airs and then heat the whole or 
part to obtain the air temperature required. It is available to dehumidify the air, and also to 
filter the air so as to get the clean air with desired humidity. 

 

Expansion 

Valve 

Drying 

Bottle/Collector 

Evaporator

Fan 

Condenser 

Compresso

 

 

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3. Ventilation system   Apart from the cool and heat the air inside the vehicle, the 
centrifugal blower is also used to change and ventilate the air inside the vehicle. The 
ventilation system consists of the air filter, air inlet, air duct, vent and etc. The system 
introduces the fresh air from the outside of vehicle into the inside while the ventilation and 
discharge port extracts the vitiated air from the inside to the outside. Chery A15LHD adopts 
the natural ventilation and forced ventilation. The open/close fresh air inlet is controlled by 
the fresh/circulating air vacuum valve. 

During the natural ventilation, the fresh air enters into the vehicle from the air inlet fixed 
under the front windscreen (positive pressure area), and gets into the trunk from the seat belt 
notch on the trunk cover, then passes across the vents (negative pressure area) on the body 
rear skirt, trunk lining, rear side beam and finally discharges to the atmosphere. Due to the 
movement of air in the rear body compartment, it plays a good role to defrost the rear 
windows. In addition, the whole process is conducted without pressure, so the air changing 
doesn’t create any noise and has nothing with the driving speed. 

And during the forced ventilation, in case that the fresh air doesn’t pass through the heating 
radiator (the mixed gate closed) after the air is pressurized by the blower, the air will enter 

into the vehicle via all air ducts, and then discharge along the same route as that of natural 
ventilation to the atmosphere. 

                                              An individual type casing system with blower 

1. Restrictor damper 

5. Fresh/recirculated air door 

9. To panel 

2. Heater core 

6. Recirculated air 

10. A/C defrost damper 

3. Blower motor 

7. Evaporator core 

11. To defroster 

4. Fresh air 

  8. Air mix damper 

12. To bottom outlet 

 

 

 

 

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Evaporator Assembly

Air-Conditi
on Harness

Air-Conditioner Compressor

4. Control system   The control system mainly consist of the electrical component, vacuum 
hose and control mechanism. On one side, it is available to control the temperature and 
pressure of refrigeration and heating system, and, on the other side, it is also used to control 
the temperature of air inside the vehicle, the blowing rate and direction. 

5. Air purification system   The air purification system mainly indicates the dust filter, 
which is used to filter the outside air inhaled, and continuously discharge the vitiated air 
generated inside the vehicle to make the air inside the vehicle clean and hygienic. 

 

 

 

 

 

 

 

 

 

 

 

 

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