Terms & Conditions
 

The Refrigeration Cycle

As the box temperature rises, the room thermostat (A) energizes the liquid line solenoid valve (B). This allows refrigerant to enter the evaporator, build up pressure, cause the low pressure control (C) to energize the compressor contactor and start the compressor. The compressor's hot discharge gas is piped out to the condenser through the de-energized 3-Way valve (D). The hot refrigerant gas is condensed by the cooler ambient air from the condenser fan. The liquid then flows to the receiver through the opened check valve (E) and on through the coiled liquid line within the suction accumulator (this performs the function as a suction to liquid heat-exchanger). The subcooled liquid then flows through the liquid line solenoid valve (energized/open) and on to the TXV (F) (Thermostatic expansion valve).

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The refrigerant is then directed through the distributor at a lower pressure and flows into the evaporator. Refrigerant is prevented to flow past the closed checkvalve (G).

The refrigerant liquid / vapour mixture is then boiled by the warmer box air from the evaporator fan. The refrigerant vapour then flows though a crankcase pressure regulator (H) preventing a motor overload from high suction pressures and enters the two suction accumulators and on to the compressor.

The cycle continues until the room temperature is satisfied. This de-energizes the liquid line solenoid, initiating a pumpdown cycle that reduces the suction pressure to the cut-out setting on the low pressure control which de-energizes the compressor.


     
 
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   & Air Conditioning Canada Corp.