Hitachi, Ltd.

Agency of Industrial Science and Technology

Hitachi Cable, Inc.

Moriichi Sato

Shigeki Komatsuzaki

Hideo Tsukioka

Etsuo Oe

Masatsugu Ogata

Hisao Sonobe

Mitsuyoshi Shoji

Masatoshi Seki

Sadayuki Okada

Ren Ito

Yoshiharu Honma

Akio Mitsuoka

Etuo Ohe

A stabilized absorption composition comprising (a) a halogenated hydrocarbon refrigerant, (b) a liquid absorbent of a polyethylene glycol methyl ether and (c) at least one stabilizer selected from phosphite esters, epoxy compounds and organotin compounds is excellent in stability and can be used for an absorption type refrigerator for a long period of time without causing corrosion.

Liquid absorbent for absorption type refrigerator

Freon stable heat transfer oil comprising polyol ester containing tris-(alkylphenyl) phosphite and benzotriazole ##STR1## or benzotriazole derivative ##STR2## in which R.sub.1 and R.sub.2 each represents a hydrogen atom or an alkyl group. It is desirable to add tris-(alkylphenyl) phosphite or tris-(phenyl) phosphite in an amount in the range between 0.02-5% by weight and to add benzotriazole or its derivative in an amount in the range between 0.02-1% by weight to the heat transfer oil.

Heat transfer oil and method for driving a Freon turbine

In a self-bondable insulated wire comprising a conductor and three resin insulating layers, the first resin insulating layer is formed with a resin selected from the group consisting of polyimide resins, polyamideimide resins and polyesterimide resins, the intermediate resin insulating layer is formed with a resin selected from the group consisting of polyvinyl formal resins and epoxy resins, and the outermost resin insulating layer is formed with a self-bondable resin of phenoxy series. Thus, a self-bondable insulated wire which is excellent in both oil resistance and heat resistance is obtained.

Self-bondable insulated wires comprising three coatings including a

An apparatus for cooling a heat generating member by utilizing the latent heat of vaporization of a boiling refrigerant, having a cooling vessel including an evaporator section containing the boiling refrigerant and adapted to transmit the heat generated by the heat generating member to the refrigerant, and a condenser section for liquefying the gasified refrigerant; a liquid refrigerant reservoir open at its upper end and adapted to store a body of the refrigerant which does not directly take part in a cooling operation while the cooling operation is being performed; and a communication means for communicating the cooling vessel with the liquid refrigerant reservoir, the cooling vessel and the communication means being filled with the boiling refrigerant.

Open-type boiling cooling apparatus

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Hitachi, Japan

Moriichi Sato