US 5,348,076 AGranted

Cooling apparatus for electronic system

AssigneeNEC Corporation

InventorKyoichi Asakawa

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Abstract

A cooling apparatus for an electronic system, includes a coolant tank, main pumps, heat exchangers, a common supplementary pump, and supplementary check valves. The coolant tank temporarily stores a coolant. The main pumps are respectively arranged in a plurality of heat generators in the electronic system, and the main pumps supply the coolant from the coolant tank to the heat generators. The heat exchangers cool the coolant from each of the heat generators and return the coolant to the coolant tank. The common supplementary pump is operated when any one of the main pumps has failed and supplies the coolant from the coolant tank. Each of the supplementary check valves has an upstream side connected to an outlet port of the supplementary pump and downstream sides connected to outlet ports of the main pumps. Each of the supplementary check valves is opened when a pressure difference between the upstream side and the downstream side of each of the supplementary check valves is larger than a predetermined value.

Claims4

Dependent claims

A cooling apparatus for an electronic system, comprising:

a coolant tank for temporarily storing a coolant;
a plurality of main pumps, respectively, arranged in a plurality of heat generators in said electronic system, for supplying said coolant from said coolant tank to said heat generators, each of said main pumps having an outlet port;
a plurality of heat exchangers individually associated with said heat generators for cooling said coolant from each of said heat generators and for returning said coolant to said coolant tank;
a common supplementary pump, operated in response to a failure of any one of said main pumps, for supplying said coolant from said coolant tank, said common supplementary pump having an outlet port;
and
a plurality of supplementary check valves, each each of said check valves having an upstream side connected to said outlet port of said supplementary pump and having downstream sides connected to said outlet port of an individually associated one of said main pumps, each of said supplementary check valves being opened in response to a pressure difference larger than a predetermined value, said pressure difference being between the upstream side and the downstream side of each of said supplementary check valves.

3 more elements

Dependencies are inferred from the claim text.