In the evaporator, cold refrigerant absorbs heat from the product and boils, providing cooling.

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The liquid-vapor mixture returns to the liquid separator. Liquid is pumped back to the evaporators, while vapor flows to the compressor.

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The compressor squeezes the vapor into a hot, high-pressure gas.

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This hot gas moves to the condenser, where air and  water removes heat and turns it into a high-pressure liquid.

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The liquid flows into the receiver for storage, then passes through an expansion valve, which lowers its pressure and controls flow back to the evaporator.