Patent ID: 8272428

Claim:
A cooling apparatus using brine, comprising: a brine circuit including: a heat absorbing member that transmits heat generated from a cooling object to the brine to cool the cooling object; a heat radiating member that radiates heat transmitted from the heat absorbing member to an atmosphere to cool the brine; a pump that circulates the brine through the heat absorbing member and the heat radiating member; and a tank that stores the brine and equalizes pressure of the brine to atmospheric pressure so that the tank is constantly open to atmospheric pressure; wherein the brine circuit is configured by circularly connecting the heat absorbing member, the heat radiating member, the pump and the tank in this order; a suction side of the pump is located lower than a liquid surface of the brine in the tank; the brine circuit further includes a switching device disposed between the pump and the tank; the switching device is configured to switch a flow direction of the brine by switching between a positive pressure mode position where the suction side of the pump is connected to the tank and a discharge side of the pump is connected to the heat radiating member and a negative pressure mode position where the suction side of the pump is connected to the heat radiating member and the discharge side of the pump is connected to the tank; when the switching device is in the positive pressure mode position, pressure of the brine circulated to the heat absorbing member and the heat radiating member is controlled to a pressure higher than the atmospheric pressure; when the switching device is in the negative pressure mode position, the pressure of the brine circulated to the heat absorbing member and the heat radiating member is controlled to a pressure lower than the atmospheric pressure; the brine circuit further includes an air releasing device disposed between the tank and the heat absorbing member, and when the brine is filled in the brine circuit, the air releasing device is opened to an atmosphere so that the brine is fed to the pump due to hydraulic head of the brine stored in the tank.