ASR2030 Evaporator Control with Eletronic Expansion Valve Teaching Equipment Refrigeration Training Equipment
Learning Objectives / Experiments
– modern refrigeration controller with electronic expansion valve
– functional principle of the controller
* thermostat function
* daytime and night-time operation
* operation with open and closed freezer
* defrost functions
* safety functions
* alarm functions
* monitoring of the components
– controller programming
– fault finding
Specification
[1] experimental unit from the practical series for the training of mechatronics engineers for refrigeration
[2] investigation and programming of an industrial refrigeration controller in the example of a freezer
[3] simulation of the freezer by way of software
[4] schematic on the front panel with lamps to indicate the operating states of the actuators
[5] programming of the refrigeration controller using a programming device
[6] simulated freezer with compressor, electronic expansion valve, fan, electric defrost heater for the evaporator, frame heating, pressure and temperature sensors
[7] real freezer components for demonstration purposes: 1 electronic expansion valve, 1 pressure sensor, 2 temperature sensor
[8] software for simulation via USB under Windows Vista or Windows 7
Technical Data
Functions of the refrigeration controller
– thermostat function
– daytime/night-time operation
– defrost functions
– messages and alarms
– fan operation
– energy saving functions
– safety functions
Simulated sensors
– air temperature upstream of the evaporator
– air temperature downstream of the evaporator
– evaporator surface temperature
– refrigerant temperature upstream of the
compressor
– refrigerant pressure upstream of the compressor
Functions of the simulation software
– outer temperature input
– opening/closing the door
– selection of refrigerant
– pressure and temperature time graphs
Dimensions and Weight
LxWxH: 660x350x570mm
Weight: approx. 20kg
Required for Operation
230V, 50/60Hz, 1 phase or 120V, 60Hz/CSA, 1 phase
