The car's air conditioner is a marriage between car heating and the
refrigeration fluid circulation. This enables the creation of controlled
climate conditions, completely independent of exterior conditions.
Therefore this climate system is a true contribution t safety and
comfort in driving.
The refrigerant circulation
The individual components of the refrigerant circulation are
interconnected by hoses and tubes and make up a closed system, In the
system the refrigerant circulates, powered by a compressor. The system
is divided into two parts: the part between the compressor and the
expansion valve is called the high-pressure side (yellow/red). The part
from expansion valve to the compressor is the low-pressure part (blue).
The refrigerant circulation. Click on the picture icon
In the compressor the
gas state refrigerant is compressed and thus seriously heated. Under
high pressure it is pressed into the condensor. Here heat is taken
from the gas, and the gas condensates into the fluid state.
The dryer, the next
station, separates contamination, air bubbles and water from the
refrigerant fluid. This way the effectiveness of the system is ensured
and components are protected against damage by any contaminations.
Next is the expansion
valve. This valve acts like water dam, keeping a steady pressure on one
side and a regular flow thru the opening in the valve. The fluid expands
when it flows thru the valve under pressure and because of the increase
in volume it absorbs energy from the environment. The expansion valve is
directly positioned before to the evaporator, the expansion happens
inside the evaporator. While the fluid is expanding into gas from again,
heat is taken from the environment.
The evaporator is
like a small radiator. It cools down to a low temperature and an
electrical driven fan circulates air thru the radiator. This heat
exchange cools the air that is then entered into the cabin of the car.
The radiator has a similar construction as the condenser, having an
increased surface by use of small aluminum plates that help the heat
A typical system
looses 70 up to 100 grams of refrigerant every year due to diffusion
from the hoses, seals and links.
The refrigerant is not only responsible for the cooling but also
lubricates the compressor. Its important that there is always enough
refrigerant in the system to ensure the lubrication and prevent any
damage and wear of the compressor. Humidity is the enemy of the
refrigerant system. The dryer does not only serve as filter
contaminations but also to absorb water. It can absorb 6 to 12 grams of
water from the refrigerant. It needs to be replaced by a (sealed) new
one to ensure proper operation whenever the system is serviced.
During a AC system
service the system is evacuated, cleaned, and then pressurized at 10 bar
using Nitrogen to locate any leaks. Then the system is refilled with the
refrigerant taken from it and topped up to the required amount.
Verbot von R12 Kältemittel !!
Nach der FCKW-Halon-Verbotsverordnung dürfen ab dem 30.06.1998
keine Pkw-Klimaanlagen mehr mit dem
Kältemittel R 12 befüllt werden
Als Alternative zur Umrüstung auf das Kältemittel 134a, bieten wir
Ihnen die kostengünstige Umrüstung auf den bewährten Ersatzstoff
R413a (DROP IN). Ein Erneuern des Kältemittelöles, sowie ein
erneuern sämtlicher Dichtungen und diverser Bauteile entfällt,
wodurch Sie viele hundert Mark sparen!
Kältemittel R413a ist FCKW-frei und bietet Ihnen die gleiche
Kühlleistung wie das Kältemittel R12.
||Preise in EURO
|Kältemittel R 134 a
||pro 100 g
|Kältemittel R 413 a
||pro 100 g
|Arbeitszeit nach Aufwand
Preise ink. MWST