Compressor
When the air conditioning system is activated while the engine is running, the belt-driven compressor starts compressing the gaseous refrigerant within the closed air conditioning loop.
Condenser
During this process, the gas heats up and then enters the condenser under high pressure, where it is cooled by the passing outside air and condenses.
Dryer
Any water or impurities introduced into the liquid refrigerant are then removed in the dryer.
Expansion valve
From the dryer, the liquid refrigerant, which is under high pressure, is injected into the evaporator through a narrow expansion valve.
Evaporator
When injected into the evaporator, the refrigerant expands and starts to evaporate already at low temperatures. The heat required for the evaporation process is extracted from the passing air and cools it down. Since cold air can bind less moisture than warm air, condensation forms on the fins of the evaporator, which is conducted to the outside through a hose. This explains puddles of condensation water under parked vehicles.
Cabin blower
The cabin blower then conveys the cold air into the interior of the vehicle. The compressor sucks in the gaseous refrigerant again and the cycle starts all over again.
The entire air conditioning system will play an important role in the thermal management of electric vehicles in the future. Previously used only for interior cooling, the air conditioning circuit will in future also be used to cool the powertrain components of hybrid and electric vehicles. This keeps the battery, electric motor, and power electronics within the optimum temperature range to ensure reliable operation. Well-functioning thermal management is therefore becoming increasingly important and has a positive effect on range, fast charging and a high level of climate comfort.
ACS 563, ACS 663 and ACS 863
Oil
Adapter kit
O-ring kit
Flushing kit
Leak detection kit
In addition to the new A/C components, Bosch already has air conditioning service units, oils for the compressor and accessories in its range for maintaining air conditioning systems. The Bosch training program also includes a qualification certificate for air conditioning technology. Bosch thus offers parts, test equipment and service for the maintenance and repair of air conditioning systems from a single source.
For the best possible air quality in the vehicle interior, each air conditioning service should include a replacement of the cabin filter. In addition, Bosch recommends changing the cabin filter once a year or every 15,000 km.
If the compressor fails, flushing the air conditioning system is the first thing to do. This removes foreign particles from the system that could impair efficient operation. For this purpose, Bosch offers a flushing kit in its accessory program that was developed together with the most important vehicle manufacturers.
After opening the air conditioning circuit, it is strongly recommended to change the dryer.
As the dryer absorbs moisture from the ambient air when it is opened, it quickly becomes saturated and can no longer fulfill its filter function in the system.
All Bosch compressors are prefilled with oil, whereby the amount of oil in the compressor is determined based on a wide range of vehicles. For certain applications, the amount of oil in the new compressor may therefore be slightly adjusted (increased or decreased), depending on the total amount of oil in the air conditioning system.
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