Parallel Expansion Refrigeration Trainer

Application: Refrigeration training equipment for educational purposes, equipped with parallel expansion valve configuration, fault diagnosis, and data acquisition functions.

Compressor: Power not less than 1/2 hp, 220 V/single phase/50 Hz, reciprocating.

Refrigerant: R-134a

Condenser: Air-cooled; fan motor power 9 watts; capacity 1/2 hp

Evaporator: Air-cooled, with an insulated observation chamber with a volume not less than 0.06 cubic meters, and equipped with front and rear dampers.

Expansion Valve: Not less than two interchangeable expansion devices, one of which is a capillary expansion valve. A third device (thermostatic or automatic) may be provided as needed.

Solenoid Valve: Select the appropriate solenoid valve according to the provided circuit configuration and rate it according to the refrigerant and operating pressure.

Sight Glass: Welded or nut-fixed.

Fault Simulation: Not less than 6 fault scenarios, achievable via switches, valves, or software, with fault indication.

Control Panel: NFB 15A; DC24V/9A Magnetic switch; 9-12A thermal relay; digital power meter; timer; pushbutton; indicator lights (red/green/yellow/white).

Data board: Measurement points include at least compressor suction and discharge, condenser inlet and outlet, expansion valve inlet and outlet, evaporator outlet, and ambient temperature.

Sensors:
Quantity: 8 temperature sensors + 2 pressure transmitters;
Type: PT100 platinum resistance temperature sensor and 4~20mA pressure transmitter;
Installation location:
T1 Sensor: Compressor discharge temperature, PT100 platinum resistance, installed at the compressor discharge pipe outlet, used for monitoring discharge temperature and compressor overheat protection.
T2 Sensor: Condenser outlet temperature, PT100 platinum resistance, installed at the condenser (heat exchanger 1) outlet, used for detecting condenser subcooling temperature.
T3 Sensor: Parallel expansion valve A inlet temperature, PT100 platinum resistance, installed at the inlet of parallel expansion valve A, used for temperature measurement before the A branch valve.
T4 Sensor: Parallel expansion valve A outlet / Evaporator A Inlet temperature, PT100 platinum resistance thermometer, installed at the outlet of parallel expansion valve A / inlet of evaporator A, can be used for superheat measurement of evaporator in branch A.
T5 Sensor: Inlet temperature of parallel expansion valve B, PT100 platinum resistance thermometer, installed at the inlet of parallel expansion valve B, can be used for temperature measurement before valve B, comparing the pressure difference and temperature difference between the two parallel lines.
T6 Sensor: Outlet temperature of parallel expansion valve B / inlet temperature of evaporator B, PT100 platinum resistance thermometer, installed at the outlet of parallel expansion valve B / inlet of evaporator B, can be used for superheat measurement of evaporator in branch B.
T7 Sensor: Evaporator outlet temperature, PT100 platinum resistance thermometer, installed on the return gas line at the outlet of evaporator (heat exchanger 2), can be used to detect the suction side temperature and calculate the system superheat.
T8 Sensor: Compressor suction temperature, PT100 platinum resistance thermometer, installed at the compressor suction port, can be used for compressor return gas temperature acquisition and liquid return protection monitoring.
P1 Transmitter: High-pressure transmitter, 4-20mA, installed on the high-pressure side of the compressor discharge/condenser inlet, used for monitoring high pressure on the condenser side, high-pressure protection training.
P2 Transmitter: Low-pressure transmitter, 4-20mA, installed on the low-pressure side of the evaporator outlet/compressor suction side, used for monitoring low pressure on the evaporator side and calculating saturated evaporation temperature.

Interface: Wired network or USB interface connected to the host.

Software: Morrillon plot; automatic P-I plot drawing; data saving; network control. Compatible with Windows 10/11.

Tablet Application: Remote monitoring via tablet application (Android/iOS).

CE and ISO certifications available. Perpetual software license provided.