Split system air conditioners are used to cool, dehumidify and also heat rooms. The consist of an inner and outer unit.
In the inner unit there is a heat exchanger with fan working as an evaporator in the refrigeration circuit during cooling operation. During heating operation it works as a condenser. The outer unit contains a compressor, another heat exchanger, expansion element (e.g. capillary tube) and an element enabling the change-over from cooling to heating operation. In cooling operation the evaporating refrigerant in the heat exchanger of the inner unit withdraws heat from the room air. In the outer unit the heat in the heat exchanger is discharged to the ambient air by condensing the refrigerant. During heating operation the heat transport is reversed. includes a dividing wall onto whose front and rear panel a modern split system air conditioner has been mounted. To better demonstrate its operation, an additional two pressure displays are available for the refrigerant. The operating mode, fan stage of the inner unit (fan operation) and desired room temperature are selected via a remote control. During automatic operation the actual room temperature is recorded and an operating mode automatically selected to achieve the specified room temperature.
The unit shall perform the following experiments and investigations:
Learning Objectives / Experiments
Design and operation of a split system air
Conditioner
6 operating modes
Cooling
Dehumidifying (slight cooling)
Heating
Ventilation (only the fan of the inner unit)
Automatic (operating mode suitable for the
Room temperature)
Test of cooling function
3 additional functions
"sleep" (switch-off after several hours)
"swing" (air outlet lamella position)
Timer for switching on and off
Remote control functions
Specification
Trainer from the practical series for the training of mechatronics engineers for refrigeration
Design and operation of a commercial split system air conditioner
Illustration of the split principle using a dividing wall
6 Different operating modes: heating, cooling, dehumidifying, ventilation, automatic, test
3 Additional functions configurable via remote control: sleep, swing, timer
2 Refrigerant manometers indicate the low and high pressure of the compressor