Patent ID: 11859605
Assignee: HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A compressor system comprising:
a compressor that compresses suctioned gas to discharge compressed gas;
an aftercooler that cools the compressed gas;
a first cooling liquid pathway through which a cooling liquid is supplied to the compressor by a first pump, the cooling liquid being cooled by a cooling heat exchanger;
a second cooling liquid pathway through which the cooling liquid is caused to flow through the aftercooler by a second pump, waste heat from the cooling liquid being recovered by a heat recovery heat exchanger;
a first valve disposed in a bypass pathway on a suction side of the second pump among a plurality of bypass pathways that connect the first cooling liquid pathway and the second cooling liquid pathway;
a second valve disposed in a bypass pathway on a discharge side of the second pump;
a third valve on the discharge side of the first pump and a fourth valve on the suction side of the first pump, the third valve and the fourth valve controlling circulation of the cooling liquid from the first pump in the first cooling liquid pathway; and
a control unit that controls the first valve, the second valve, the third valve, and the fourth valve,
wherein the control unit performs first control to close the first valve and the second valve and open the third valve and the fourth valve, and performs second control to open the first valve and the second valve and close the third valve and the fourth valve.