Hitachi, Ltd.

Other

Hitachi Cable, Inc.

Hitachi, Ltd. for the Benefit of Hitachi Air Conditioning Systems Co. Ltd.

Hitachi-johnson Controls Air Conditioning, Inc.

Mari Uchida

Masaaki Itoh

Toshihiko Fukushima

Hiroaki Matsushima

Tadao Otani

Mitsuo Kudoh

Hiroyuki Ohta

Hitoshi Matsushima

Masanori Ishikawa

Eiji Ishii

Hiromi Shimazu

Sachio Sekiya

Hiroshi Kusumoto

Yohei Tanno

Hiroshi Kogure

Masanao Kotani

Naoki Shikazono

Mitsugu Aoyama

Naoto Saito

Mituo Kudoh

Tomohiro Komatsu

Yoshikazu Ishiki

Syoji Takaku

Kokugan Yoko

Tsunayuki Itagaki

A magnetic disk device includes a magnetic disk and a magnetic head having a magnetic head slider flying by an action of air during rotation of the magnetic disk, wherein an inflow of air from a direction of a leading side face of the magnetic head slider forming an air bearing film effect at an air bearing surface face of the magnetic head slider which faces the magnetic disk, and the air flows out from a trailing side face of the magnetic head slider. The magnetic head slider has a wettability, in at least a part of an outer region defined on the trailing side face and adjoining other faces including the air bearing surface face of the magnetic head slider, which is lower than a wettability of at least one other region present at the trailing side face.

Magnetic disk device with magnetic head slider having trailing side face part with reduced wettability

A transport container comprising a spherical containerand a heat accumulating materialdisposed inside of the spherical container, wherein; the heat accumulating materialis provided with a space for holding a transported object therein, and the space is formed at the central part of the inside of the spherical container

Transport container, transporting method for the same, and constant temperature transport container

In a solidification sensor for measuring a solidification state of a liquid with a high degree of accuracy in real time, and for making the sensor small-sized with a reduced power consumption, the solidification sensor comprises a liquid absorbing portion formed of a liquid absorbable material, a substrate coupled to the liquid absorbing portion and a strain sensor for measuring strain exerted to the substrate due to a volumetric change upon solidification of a liquid absorbed in the liquid absorbing portion.

Solidification sensor

A laminated heat exchanger includes a plurality of laminated plates, in which a plurality of heat transfer tubes bent into a zigzag form are arranged in contact with each surface of each of the plates, and the plates are laminated so that the heat transfer tubes on one of adjacent plates intersect with the heat transfer tubes on the other of the adjacent plates.

Laminated heat exchanger and refrigeration cycle

To provide a high heat transfer performance with a heat transfer pipe used to a condenser and an evaporator in a refrigerating cycle using a refrigerant mixture, the heat transfer pipe includes main grooves and auxiliary grooves each formed on the inner surface of the heat transfer pipe with the main grooves intersecting the auxiliary grooves, wherein the main grooves are separate by ridges, and the ridges are divided into ribs by the auxiliary grooves, and wherein a length of the ribs formed along the direction of the main grooves is made longer than the length of the ridges, a width of the auxiliary grooves is made smaller than the length of the ribs and further the auxiliary grooves are formed in a direction where a pressure gradient in the heat transfer pipe is reduced.

Heat transfer pipe for refrigerant mixture

In a heat transfer tube for a zeotropic refrigerant mixture, the inner surface of the tube in which the zeotropic refrigerant mixture flows is formed with grooves having cross portions where the grooves intersect with each other, or the inner surface of the tube is formed with a plurality of independent projections. Thus, concentration boundary layers generated in the zeotropic refrigerant mixture are stirred to reduce the thickness of the concentration boundary layers, thereby decreasing the diffusion resistance and promoting the stirring effect. Consequently, there can be provided a heat transfer tube for a zeotropic refrigerant mixture which exhibits a high heat transfer performance, and a heat exchanger of a cross-fin tube type, a refrigerator and an air conditioner which include such heat transfer tubes.

Refrigeration cycle

A heat exchanger, in which a plurality of fins formed on either an internal or an external face of a heat transfer tube, wherein each of the plurality of fins has a first portion including a fin top and a second portion including a fin root, and wherein the first portion has a ridgeline formed in a raised and recessed shape, or in a wave-like or corrugated shape, and the second portion has a substantially straight outline in a fin longitudinal direction in a cross section parallel to either the internal or the external face on which the plurality of fins are formed.

Heat exchanger

An air-conditioner of a heat pump type includes a refrigeration cycle including an interior heat exchanger, an exterior heat exchanger, a compressor, a four-way valve, and an expansion mechanism, and a non-azeotrope refrigerant composed of not less than two kinds of refrigerants is used as a working medium. A refrigerant path in each of the interior and exterior heat exchangers is divided into a group of first refrigerant passages located at a region where a proportion of the liquid-phase refrigerant is large and a group of second refrigerant passages located at a region where a proportion of the liquid-phase refrigerant is small. At least part of the group of first refrigerant passages of each of the interior and exterior heat exchangers is located at the windward side. Heat transfer tubes of the group of first refrigerant passages of each of the interior and exterior heat exchangers are smaller in flow-passage cross-sectional area than those of the corresponding group of second refrigerant passages.

Air-conditioner employing non-azeotrope refrigerant

Growing community of inventors

Tsuchiura, Japan

Mari Uchida