Abstract: A cooling device for cooling a rack-type server of which a housing includes a plurality of electronic devices includes an interior cooling unit and an exterior cooling unit. The interior cooling unit includes a heat-receiving unit, a heat dissipation unit, an outward path pipe, and a return path pipe. The interior cooling unit allows working fluid to be circulated through the heat-receiving unit, the outward path pipe, the heat dissipation unit, the return path pipe, and the heat-receiving unit to thereby move the heat from the heat-receiving unit to the heat dissipation unit. The exterior cooling unit has a heat exchange unit abutted on the heat dissipation unit and allows, by a circulated cooling medium, the heat of the working fluid discharged from the heat dissipation unit to be dissipated to external air.

Abstract: A cooling device for cooling a rack-type server of which a housing includes a plurality of electronic devices includes an interior cooling unit and an exterior cooling unit. The interior cooling unit includes a heat-receiving unit, a heat dissipation unit, an outward path pipe, and a return path pipe. The interior cooling unit allows working fluid to be circulated through the heat-receiving unit, the outward path pipe, the heat dissipation unit, the return path pipe, and the heat-receiving unit to thereby move the heat from the heat-receiving unit to the heat dissipation unit. The exterior cooling unit has a heat exchange unit abutted on the heat dissipation unit and allows, by a circulated cooling medium, the heat of the working fluid discharged from the heat dissipation unit to be dissipated to external air.

Abstract: A cooling apparatus includes: a heat receiving portion including a heat receiving plate which transfers heat from a heat source to a working fluid; a heat radiating portion which discharges the heat of the working fluid; and a heat radiating path and a return path which connect the heat receiving portion and the heat radiating portion to each other. In the cooling apparatus, the working fluid is circulated through the heat receiving portion, the heat radiating path, the heat radiating portion, the return path and the heat receiving portion to dissipate the heat of the heat source. A check valve which controls a flow of the working fluid is provided in the return path at a location near the heat receiving portion or provided in the heat receiving portion.

Abstract: A cooling unit includes a partition board, a heat exchanger, and a blower. The partition board is disposed on one of a plurality of surfaces of an electronic device so as to partition the inner and the outer side of the electronic device. The heat exchanger is disposed on the outer side so as to exchange heat generated by the electronic device with outside air. The blower is disposed on the outer side. The heat exchanger includes hot-air passage bodies and air pathways. The hot-air passage bodies include a plurality of air passages arranged side by side at predetermined intervals in such a manner as to connect a first vent and a second vent of the partition board on the outer side. The blower blows air of the inner side from the first vent to the second vent through the hot-air passage bodies.

Abstract: An ethylene-vinylalcohol copolymer film is prepared by biaxially or multiaxially stretching a nonstretched ethylene-vinylalcohol polymer film having a moisture content of not more than 3.5%, said ethylenevinyl alcohol copolymer having an ethylene content of 20 to 55 mole % and a saponification degree of not less than 96 mole % and said stretching being conducted within a temperature range of 50.degree. to 150.degree. C. to such an extent that the film is expanded to an area 4 to 20 times the original area.