REFRIGERATION CYCLE DEVICE

• Main Authors: KAMIKAWA, Masaaki, KANDA, Masahiro
• Format: Patent
• Language: English; French; German
• Published: 10.04.2019
• Subjects: BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS; WEAPONS

A refrigeration cycle apparatus includes: a refrigerant circuit; a liquid injection pipe branching off from a pipe between a condenser and a pressure reducing device of the refrigerant circuit to be connected to a liquid injection port of a screw compressor; an adjustment device provided to the liquid injection pipe and configured to adjust a liquid injection amount; and a controller configured to control the adjustment device. The controller is configured to: perform control for controlling the adjustment device so that a discharge temperature of refrigerant discharged from the screw compressor becomes a target discharge temperature during an operation of the screw compressor; and control, when the operation of the screw compressor is to be stopped, the adjustment device to increase the liquid injection amount, and then stop the screw compressor.