MR111A Advanced Automotive Air Conditioning (Demonstration Unit) Refrigeration Trainer School Equipment Teaching
1. Overview
The MR111A Advanced Automotive Air Conditioning Demonstration Unit is designed to demonstrate the operation and performance of automotive air conditioning systems. It can simulate and observe the performance characteristics of air conditioning under various operating conditions, including troubleshooting. The unit completes six electrical fault simulations for practice and is equipped with several instruments. These instruments will help you make several measurements and will be a valuable addition to the analysis and exploration of the system.
2. About MR111A Advanced Automotive Air Conditioning (Demonstration Unit)
2.1 Item List
2.11 Automotive Air Conditioning Unit
The components are as follows:
(1) Compressor with magnetic clutch
(2) Forced air condenser
(3) Dryer
(4) Evaporator with blower
(5) Expansion valve
(6) Dual pressure switch
(7) Pressure gauge (connected to the compressor via a hose)
(8) Instrument and control panel
(9) Fault simulator board with test points
(10) Frequency converter
(11) Electric drive motor for the compressor
(12) Piping diagram
2.12 Experimental Manual
2.2 Refrigeration circuit
2.21Temperature sensor and control
(1) A temperature selector is used to conveniently display the temperature at multiple locations in the refrigeration circuit.
T1: Compressor inlet temperature
T2: Compressor outlet temperature
T3: Condenser inlet temperature
T4: Condenser outlet temperature
T5: Expansion valve inlet temperature
T6: Expansion valve outlet temperature and evaporator inlet temperature
T7: Evaporator outlet temperature
T8: Ambient temperature
(2) Temperature control
2.22 Instruments and control panel
(1) ELCB is used as a leakage protection for the circuit.
(2) MCB is a circuit breaker used to protect the circuit from overcurrent.
(3) The main power switch is used as a switch to enable power to be supplied to the inverter and DC power supply.
(4) The condenser fan speed control switch is used to control the condenser fan speed.
(5) The temperature selector and display are used to select the temperature point and display it on the display.
(6) The voltmeter is used to measure the DC voltage of the power supply.
(7) The ammeter is used to measure the current consumption.
(8) The drive motor speed is used to monitor the speed of the drive motor to simulate the engine speed.
2.23 DC power supply
2.24 Fault Simulation Points and Test Points
2.25 Power supply
(1) Power supply: three-phase AC220V±10%;
(2) FU1: evaporator unit fuse;
(2) FU2: condenser fan motor fuse;
(4) FU3: compressor clutch fuse.
2.3 Air Conditioning Components
1 Compressors
2 Condenser
3 Condenser Electric Fan
4 Dryer Filter
5 Thermostatic Expansion Valve
6 Evaporator
7 Thermostat
3. Experiment
Experiment 1 P-H diagram representation of refrigeration cycle
Experiment 2 System performance analysis
Experiment 3 Compressor Speed Variation
Experiment 4 Condenser Fan Speed Variation
Experiment 5 Variation of Evaporator Blower Speed
Experiment 6 Dual pressure switch failure (F1)
Experiment 7 Condenser fan motor failure (F2)
Experiment 8 Compressor Clutch Fuse Blown (F3)
Experiment 9 Compressor Electromagnetic Clutch Fault (F4)
Experiment 10 Thermostat Fault (F5)
Experiment 11 Evaporator Blower Motor Fault (F6)
