Patent ID: 8601831

Claim:
A refrigerating machine comprising: a refrigerant circuit having a compressor; a condenser; a restrictor; an evaporator, the compressor, the condenser, the restrictor, and the evaporator being operatively connected to one another; and a stop valve disposed in a refrigerant path extending from the condenser to the evaporator; and a control unit that controls the stop valve, the control unit being configured to open the stop valve a plurality of times during a single defrosting operation and close the stop valve a plurality of times during the single defrosting operation, the single defrosting operation being performed only when the compressor is switched off; wherein the refrigerating machine is configured such that a refrigerant flows from the condenser to the evaporator during the single defrost operation through the stop valve and the restrictor, and the opening and closing of the stop valve a plurality of times during the single defrosting operation allows the refrigerant to heat up in the condenser during the times when the stop valve is closed, and allows the heated refrigerant to flow into the evaporator when the stop valve is open.