Refrigeration and Freezing Stage Unit

Description of Refrigeration and Freezing Stage Unit:

This is part of the HSI training system for refrigeration and air conditioning technology. In combination with the base unit the operational model of a refrigeration system with refrigeration and freezing stage results. The model is plugged onto the base unit, secured using fasteners and connected with refrigerant hoses to become a complete refrigeration circuit. In refrigeration and freezing combinations evaporators are preferably connected in parallel. To increase the refrigeration capacity, evaporators are operated connected in series. Here different pressure levels in the evaporators can be used to obtain different temperature ranges for refrigeration or freezing.

Specification of Refrigeration and Freezing Stage Unit:

1. Model of a refrigeration system to plug onto the base unit

2. Training system with HSI technology

3. Each refrigeration chamber includes: evaporator with fan (to recirculate the air) and heater to generate the cooling load

4. Refrigeration chambers with transparent front

5. Adjustable evaporation pressure controller

6. Selectable expansion elements: expansion valve or capillary tube

7. Operating modes of the system configurable via 5 solenoid valves

8. Sensors to record temperature and pressure

9. Operation of solenoid valves, fan, heater and fault simulation via software