Other

Mikio Harada

Takashi Saitoh

Takahiro Daikoku

Akira Saito

Akio Uchida

Tateki Kurokawa

Toshio Fukukawa

Hideo Yazawa

Kan-ichi Tachibana

Provided is a cooling apparatus for feeding liquid coolant to electronic elements as heat generating elements in an electronic system through a cooling pipe. The cooling pipe is in part flattened so as to form flattened portion which is made into contact with the electronic parts for cooling the latter. With this arrangement, the pipe line working is simplified while the number of joint parts in the pipe line is decreased so as to prevent leakage of the liquid coolant. Further, the heat-exchange capacity of a heat-exchanger unit is controlled in accordance with an atmospheric temperature, a temperature in the electronic system and a temperature of the liquid coolant in order to aim at preventing occurrence of freezing or dewing while enhancing the operating efficiency. Further, in an electronic apparatus having two electronic systems, a liquid coolant tank is commonly used for two electronic systems in order to prevent occurrence of dewing or freezing in a cooling system for the electronic system on resting.

Cooling apparatus for electronic unit

A novel gap type surge absorber. The surge absorber comprises a plurality of conductive ceramic thin films formed on the surface of a molded insulating body and separated from each other by an extremely narrow gap, electrodes composed of a metallic material fixed to both ends of the plural conductive ceramic thin films and an inert gas sealed between the electrodes. The surge absorber is based on a two-stage discharge mechanism consisting of a discharge due to electrons emitted between the conductive ceramic thin films when a surge voltage is applied to the electrodes and a following creeping discharge generated between the electrodes. The surge absorber has a prolonged life and a good annealing characteristic as well as a very small discharge lag and a small electrostatic capacity and is excellent in cutting off a follow current.

Surge absorber

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Iruma, Japan

Mikio Harada