Chery S11 / Chery QQ. Manual — part 71

Chery QQ Service Manual

Chapter7 Air-conditioning

Section 1 General

I. Major parts of the air-conditioning and refrigerant flow chart.

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II. Function descriptions of each part

1. C

ompressor

The compressor serves to compress the refrigerant that is evaporated as gaseous one

in evaporator, so the compressed gaseous refrigerant is fed by force into condensator

in which it is changed to liquid form, heat resulted from vaporization of liquid

refrigerant can be reused. Compressor used in auto air conditioning can be classified

as reciprocating, rotating blade and oblique disk style. This car adopts oblique disk

style compressor that is characterized by little vibration and good

durability

. As the

pictures show:

Assembly drawing for the compressor Inside structure of the compressor1

Inside structure of the compressor 2 Inside structure of the compressor3

2. Electric magnetic clutch

In case of engine operating, when starting up air conditioning, the electric magnetic

clutch engages, compressor runs. Otherwise, the electric magnetic clutch disengages,

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compressor does not run. .

It is recommended to use high power electric magnetic clutches.

Diagram for the clutch fitted on the compressor

3. Condensator

A condensator serves to change the high temperature and high pressure refrigerant in

gaseity to liquid one by taking away the heat of the refrigerant in gaseity by force.

With similar structure as radiator, the condensator is installed at the most front of the

car so as to upgrade heat dissipation rate and is forcedly cooled by cooling fan.

4. Receiver drier

Stock solution drier has 3 following functions:

A)A liquid reservoir is equal to a temporary buffer for liquefacient refrigerant in

condensator, it used to provide evaporator with liquefacient refrigerant as per the need

of cooling load.

B)The drier serves to remove moisture and contamination in the refrigerant with the

filter and

desiccant sealed in itself.

dryer

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5. High-low pressure protection switch

The high-low pressure protection switch is used for control. When there is abnormal

pressure variation occurring in circular refrigerant, the switch will cut off the circuit

of the electric magnetic clutch and the condensator’s fan to stop the compressor.

6. Expansion valve

The expansion valve ejects the liquid refrigerant from a slim hole that pass through

stock solution drier to expand it suddenly and produces low temperature and low

pressure pulverization refrigerant.

7. Evaporator

The cooled pulverization refrigerant makes the temperature inside car lower through

evaporator. Meanwhile the refrigerant turns to the thermal gaseous refrigerant and is

supplied into the compressor. As far as function is concerned, evaporator is directly

contrary to that of condensator (when refrigerant enters evaporator it is liquid. While

it is in gaseity when exit.)

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