Air Water Inc.

Taketo Johchi

Akira Yoshino

Shingo Kunitani

A cryogenic pump for liquefied gases is provided, which shortens precooling time, has a small loss of cryogenic liquefied gas, excels in pump efficiency, and is advantageous in cost. A motorand an impellerare coupled by a shaftfor transmitting a rotative drive force therebetween, and the motoris arranged on an upper side and the impelleris arranged on a lower side. The motorand the impellerexist in an enclosed spacewhere they are communicated with each other and into which the cryogenic liquefied gas is introduced. A heat adjusting unitis provided between the motorand the impeller, the heat adjusting unit maintaining existence of the impellerin a liquid phase of the cryogenic liquefied gas and maintaining existence of the motorin a gas phase of the cryogenic liquefied gas. Thus the submerging of the motorin the liquid becomes unnecessary, whereby the precooling time can be reduced remarkably and the loss of cryogenic liquefied gas due to vaporization caused by the submerging can be reduced, and in addition, the motoritself can be configured at a comparatively low cost.

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Izumiotsu, Japan

Taketo Johchi