Air conditioning like it says “conditions” the air. It not only cools it down, but also reduces the humidity. All air conditioners work with the same way whether they are installed in a building, or in a car. The air conditioning in the car reduces the number of kilometers per liter because there is energy used in removing the heat and moisture from the air inside, and this consumes petrol because of the extra engine load. The air conditioning’s main principles are Evaporation and Condensation, then Compression and Expansion (for engineers and physicists we talk about thermodynamics). Hard tubing and flexible hoses connect all the components of the air conditioning in a car and the above principles are the physics of why it works. There are five main components to the whole system, namely the compressor, condenser, receiver-dryer, expansion valve and the evaporator and the fluid that passes the whole system is the refrigerant. All air conditioning systems work on the same principle, even if the exact components used may vary slightly between car manufacturers. There are two trainers designed by De Lorenzo that can cover this field, one simulator and one demonstrator. The simulation panel is designed to allow the complete learning of the techniques and of the electromechanical and electronic devices usually used for the regulation and control of automotive air conditioning. A fault simulator, for troubleshooting, is provided and it can be interfaced to personal computer through a CAI software. The demonstrator trainer integrates the real main components of a vehicle air conditioning system. It is possible to monitor the compressor’s inlet and outlet pressures and the temperatures of the condenser and of the evaporator. It includes a fault simulation console to perform troubleshooting on compressor, cooling fan and evaporator. They are recommended for professional institutes, vocational schools and technical colleges.
This simulation panel is properly designed and realized to allow an easy and complete learning of the techniques and of the electro-mechanical, and electronic devices that are used for the regulation and control of automotive air conditioning.
To cool the external air, refrigerating compressor based systems are exclusively used.
The compressor activated by the engine compresses the refrigerant, which consequently warms up; in the condenser the working fluid is cooled until it reaches the liquid phase.
The cooling is obtained by giving heat to the exterior in the zone around the compressor.
The cooled fluid expands in the expansion valve and in the evaporator and is transformed in gas.
The heat necessary for such transformation is subtracted from the entering cool air.
• Dim. mm approx (HxLxW) : 700x1000x150 - (470 with the base)
• Weight approx. kg 25
• Input power supply: AC 220V±10% 50 Hz
• Working temperature: -40℃ ~ +50℃.
The simulator analyses all the phases of the refrigeration cycle. In particular:
- Relations between temperature and pressure in the refrigerant
- Operation of the compressor
- Operation of the condenser
- Pressure switches
- Temperature regulation
This vertical frame bench-top trainer is specially designed to show to students how automotive systems work.
The simulator consists of a panel operated by the support of a computer with a coloured silk-screen diagram that clearly shows the structure of the system and allows the location of the components on it.
The display of the information available on the computer screen allows the continuous control of the educational system.
The operational conditions can be entered by the students and the insertion of faults can be carried out through the computer by the teacher.
The trainer is supplied with a CAI Software and the supported documentation guides the students to the study and the performance of the simulation exercises.
All components installed and given leads are made to protect the safety of the students.
The trainer corresponds to an aftermarket unit mounted on a chassis. Ideal for training in the operation, maintenance, repair and troubleshooting.
The system can simulate 4 electrical failures without disconnecting connectors and wires, but by acting on switches which interrupt the following circuits:
• Compressor enable signal from pressure switch
• Compressor clutch
• Cooling fan enable signal from pressure switch
• First speed evaporator fan
• Dim. mm approx (HxLxW) : 1300X1000X750
• Weight approx. kg 150
• Power supply: AC 220V±10% 50/60 Hz
• Working temperature: -40℃ ~ +50℃.
This trainer integrate the main components of a vehicle air conditioning system.
The compressor is driven by an electric motor at mains voltage allowing the execution of the refrigeration cycle and the operation of the entire system.
It is possible monitoring the compressor inlet pressures (low pressure, blue) and the compressor output pressure (high pressure, red) and the temperatures of the condenser and of the evaporator.
• Max. power 2 kW
• Cooling liquid 400 gt Freon R134a
• Piston compressor
• Dehydrating filter
• Pressure switch
• Expansion valve
• Evaporation unit
• Troubleshooting device for simulation of 4 faults
• Nomenclature table