CME1356R and CME1656R
How The Electronic Cuber Works
This section is intended for the technician. It is not necessary for the normal operation and maintenance of the machine.
Refrigeration System:
The refrigeration system is similar to that of most commercial cube ice machines. Heat is removed from the water and discharged out the condenser during the freeze cycle. As liquid refrigerant passes thru the Thermostatic Expansion Valve, it enters the top of the evaporators, and ice will form at the top first.
When cubes need to be released (Harvest) the Hot Gas Valve is opened and Hot discharge gas flows directly from the compressor to the evaporator inlets. At the same time, a Harvest Bypass Valve opens for a few seconds to add the refrigerant needed for harvest. After that the Harvest Bypass Valve and the closed Discharge Check Valve keeps the refrigerant in the condenser out of the Hot Gas Circuit.
Harvest
Bypass
Valve
Discharge Line
Receiver
Check
Valve
Remote Condenser
Head
Pressure
Control
Valve
Check
Valve
Heat
Exchange
This warms up the evaporators and the surface of the ice frozen to the evaporator surface melts. Ice then falls into the bin.
The Check Valves also prevent liquid migration during the Off cycle.
Thermostatic
Expansion
Valve
Refrigerant
Distributor
Evaporator
Suction
Process Port
Evaporator
Accumulator |
| |
Hot Gas | Evaporator | |
Valve | ||
|
Compressor
Refrigeration Schematic
May 2001
Page 22