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US 12,584,504 B2Granted
Hydraulic unit
AssigneeDaikin Industries, Ltd.
InventorHirotoshi Torii
Life of this patent
Estimating the term…
Abstract
A hydraulic unit includes an oil tank, a hydraulic pump, a first return pipe, and a first heat exchanger. The oil tank stores a hydraulic oil. The hydraulic pump supplies the hydraulic oil in the oil tank to an actuator. The first return pipe returns the hydraulic oil from a flow path between a discharge port of the hydraulic pump and the actuator to the oil tank. The first heat exchanger causes a coolant to exchange heat with the hydraulic oil returning to the oil tank through the first return pipe.
Claims17
A hydraulic unit comprising:
- an oil tank configured to store a hydraulic oil;
- a hydraulic pump configured to supply the hydraulic oil in the oil tank to an actuator;
- a first return pipe through which the hydraulic oil is returned from a flow path between a discharge port of the hydraulic pump and the actuator to the oil tank;
- a first heat exchanger configured to cause a coolant to exchange heat with the hydraulic oil returning to the oil tank through the first return pipe;
- a motor configured to drive the hydraulic pump;
- a control unit including a power semiconductor configured to drive the motor;
- and
- a second heat exchanger located downstream of the first heat exchanger with respect to a flow of the coolant, the second heat exchanger being configured to cause the coolant discharged from the first heat exchanger to exchange heat with the power semiconductor of the control unit.
5 more elements
A hydraulic unit comprising:
- an oil tank configured to store a hydraulic oil;
- a hydraulic pump configured to supply the hydraulic oil in the oil tank to an actuator;
- a first return pipe through which the hydraulic oil is returned from a flow path between a discharge port of the hydraulic pump and the actuator to the oil tank;
- a first heat exchanger configured to cause a coolant to exchange heat with the hydraulic oil returning to the oil tank through the first return pipe;
- a motor configured to drive the hydraulic pump;
- and
- a third heat exchanger located downstream of the first heat exchanger with respect to a flow of the coolant, the third heat exchanger being configured to cause the coolant discharged from the first heat exchanger to exchange heat with the motor.
4 more elements
A hydraulic unit comprising:
- an oil tank configured to store a hydraulic oil;
- a hydraulic pump configured to supply the hydraulic oil in the oil tank to an actuator;
- a first return pipe through which the hydraulic oil is returned from a flow path between a discharge port of the hydraulic pump and the actuator to the oil tank;
- a first heat exchanger configured to cause a coolant to exchange heat with the hydraulic oil returning to the oil tank through the first return pipe;
- a motor configured to drive the hydraulic pump;
- a control unit including a power semiconductor configured to drive the motor;
- and
- a second heat exchanger configured to cause the power semiconductor of the control unit to exchange heat with the hydraulic oil flowing through the first return pipe downstream of the first heat exchanger,
- the first return pipe being configured such that all the hydraulic oil discharged from the first heat exchanger passes through the second heat exchanger.
6 more elements
A hydraulic unit comprising:
- an oil tank configured to store a hydraulic oil;
- a hydraulic pump configured to supply the hydraulic oil in the oil tank to an actuator;
- a first return pipe through which the hydraulic oil is returned from a flow path between a discharge port of the hydraulic pump and the actuator to the oil tank;
- a first heat exchanger configured to cause a coolant to exchange heat with the hydraulic oil returning to the oil tank through the first return pipe;
- a motor configured to drive the hydraulic pump;
- a third heat exchanger configured to cause the motor to exchange heat with the hydraulic oil flowing through the first return pipe downstream of the first heat exchanger,
- the first return pipe being configured such that the hydraulic oil discharged from the first heat exchanger passes through the third heat exchanger before the hydraulic oil returns to the oil tank.
4 more elements
A hydraulic unit comprising:
- an oil tank configured to store a hydraulic oil;
- a hydraulic pump configured to supply the hydraulic oil in the oil tank to an actuator;
- a first return pipe through which the hydraulic oil is returned from a flow path between a discharge port of the hydraulic pump and the actuator to the oil tank;
- a first heat exchanger configured to cause a coolant to exchange heat with the hydraulic oil returning to the oil tank through the first return pipe;
- a second return pipe through which the hydraulic oil discharged from the actuator is returned to the oil tank;
- and
- a fourth heat exchanger configured to cause the coolant to exchange heat the hydraulic oil returning to the oil tank through the second return pipe, the fourth heat exchanger being located downstream of the first heat exchanger with respect to a flow of the coolant such that the coolant discharged from the first heat exchanger passes through the fourth heat exchanger.
4 more elements
Dependencies are inferred from the claim text.