Importance

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Abstract

A reservoir tank includes: a tank chamber for storing a cooling fluid; a gas-liquid separation chamber provided adjacently below the tank chamber in a vertical direction; a partition wall for partitioning the tank chamber and the gas-liquid separation chamber; an inflow pipe for sending the cooling fluid into the reservoir tank; and a discharge pipe for discharging the cooling fluid from the reservoir tank. The inflow pipe and the discharge pipe are connected to the gas-liquid separation chamber, the gas-liquid separation chamber has a cylindrical outer peripheral wall, the cooling fluid sent in from the inflow pipe to the gas-liquid separation chamber flows along the cylindrical outer peripheral wall in a curved manner so as to rotate around a vertical axis, and is guided to the discharge pipe, the partition wall is provided with a communication hole communicating the tank chamber with the gas-liquid separation chamber, and the communication hole is provided at a position closer to a central axis of the cylindrical outer peripheral wall than to the cylindrical outer peripheral wall when viewed in the vertical direction.

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First Claim