Evaporator Control with Eletronic Expansion Valve Teaching Equipment Refrigeration Training Equipment

SR2030 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