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US 12,385,475 B2Granted
Reciprocating compressor
AssigneeKobe Steel, Ltd.
InventorsDaisuke Wada, Naofumi Kanei
Life of this patent
Estimating the term…
Abstract
Provided is a reciprocating compressor including a third-stage compression unit, a fifth-stage compression unit, a drive unit, a discharge mechanism, a pressure sensor, and a discharge control unit. The discharge mechanism is capable of discharging hydrogen gas from a second connection pipe that allows hydrogen gas to flow to be suctioned into the third-stage compression unit. The discharge control unit controls the discharge mechanism to discharge the hydrogen gas from the second connection pipe when pressure of the hydrogen gas detected by the pressure sensor is higher than a set value preset.
Claims6
A reciprocating compressor for compressing hydrogen gas, the reciprocating compressor comprising:
- a low-pressure stage compression unit that includes a low-pressure stage piston, a low-pressure stage cylinder that houses the low-pressure stage piston, and a piston ring group attached to the low-pressure stage piston to compress hydrogen gas;
- a high-pressure stage compression unit that includes a high-pressure stage piston connected to the low-pressure stage piston, a high-pressure stage cylinder that houses the high-pressure stage piston and is connected to the low-pressure stage cylinder, and a piston ring group attached to the high-pressure stage piston to compress hydrogen gas after being compressed by the low-pressure stage compression unit;
- a drive unit for driving the high-pressure stage compression unit and the low-pressure stage compression unit;
- a discharger that allows hydrogen gas to be discharged from a suction-side flow path that allows hydrogen gas to flow to be suctioned into the low-pressure stage compression unit;
- a pressure sensor for detecting a pressure of hydrogen gas suctioned into the low-pressure stage compression unit or a pressure of hydrogen gas discharged from the low-pressure stage compression unit;
- and
- a discharge control unit for controlling the discharger to discharge hydrogen gas from the suction-side flow path when the pressure of hydrogen gas detected by the pressure sensor is higher than a set value preset;
- wherein the set value is a predetermined normal pressure value of hydrogen gas suctioned into the low-pressure stage compression unit when a differential pressure between a pressure in the suction-side flow path and a pressure in a compression chamber of the low-pressure stage compression unit reaches a predetermined pressure value to open a suction valve of the low-pressure stage compression unit, or the set value is a predetermined normal pressure value of hydrogen gas discharged from the low-pressure stage compression unit.
5 more elements
A reciprocating compressor for compressing hydrogen gas, the reciprocating compressor comprising:
- a low-pressure stage compression unit that includes a low-pressure stage piston, a low-pressure stage cylinder that houses the low-pressure stage piston, and a piston ring group attached to the low-pressure stage piston to compress hydrogen gas;
- a high-pressure stage compression unit that includes a high-pressure stage piston connected to the low-pressure stage piston, a high-pressure stage cylinder that houses the high-pressure stage piston and is connected to the low-pressure stage cylinder, and a piston ring group attached to the high-pressure stage piston to compress hydrogen gas after being compressed by the low-pressure stage compression unit;
- a drive unit for driving the high-pressure stage compression unit and the low-pressure stage compression unit;
- a discharger that allows hydrogen gas to be discharged from a suction-side flow path that allows hydrogen gas to flow to be suctioned into the low-pressure stage compression unit;
- a pressure sensor for detecting a pressure of hydrogen gas suctioned into the low-pressure stage compression unit or a pressure of hydrogen gas discharged from the low-pressure stage compression unit;
- and
- a discharge control unit for controlling the discharger to discharge hydrogen gas from the suction-side flow path when the pressure of hydrogen gas detected by the pressure sensor is higher than a set value preset;
- wherein the drive unit includes a motor that is rotatable;
- and
- the reciprocating compressor further comprises:
- an inverter capable of adjusting rotational speed of the motor in the drive unit;
- and
- a rotational speed control unit for controlling the inverter to increase the rotational speed of the motor in compensation for an amount of hydrogen gas discharged from the suction-side flow path when discharging hydrogen gas from the suction-side flow path.
10 more elements
A reciprocating compressor for compressing hydrogen gas, the reciprocating compressor comprising:
- a low-pressure stage compression unit that includes a low-pressure stage piston, a low-pressure stage cylinder that houses the low-pressure stage piston, and a piston ring group attached to the low-pressure stage piston to compress hydrogen gas;
- an intermediate-stage compression unit for compressing hydrogen gas discharged from the low-pressure stage compression unit;
- a high-pressure stage compression unit that includes a high-pressure stage piston connected to the low-pressure stage piston, a high-pressure stage cylinder that houses the high-pressure stage piston and is connected to the low-pressure stage cylinder, and a piston ring group attached to the high-pressure stage piston to compress hydrogen gas discharged from the intermediate-stage compression unit;
- a drive unit for driving the low-pressure stage compression unit, the intermediate-stage compression unit, and the high-pressure stage compression unit;
- a discharger that allows hydrogen gas to be discharged from a suction-side flow path that allows hydrogen gas to flow to be suctioned into the low-pressure stage compression unit;
- a pressure sensor for detecting a pressure of hydrogen gas suctioned into the low-pressure stage compression unit, a pressure of hydrogen gas discharged from the low-pressure stage compression unit and suctioned into the intermediate-stage compression unit, or a pressure of hydrogen gas discharged from the intermediate-stage compression unit and suctioned into the high-pressure stage compression unit;
- and
- a discharge control unit for controlling the discharger to discharge the hydrogen gas from the suction-side flow path when the pressure of the hydrogen gas detected by the pressure sensor is higher than a set value preset;
- wherein the set value is a predetermined normal pressure value of hydrogen gas suctioned into the low-pressure stage compression unit when a differential pressure between a pressure in the suction-side flow path and a pressure in a compression chamber of the low-pressure stage compression unit reaches a predetermined pressure value to open a suction valve of the low-pressure stage compression unit, or the set value is a predetermined normal pressure value of hydrogen gas discharged from the low-pressure stage compression unit, or the set value is a predetermined normal pressure value of hydrogen gas suctioned into the high-pressure stage compression unit.
6 more elements
Dependencies are inferred from the claim text.