Sanyo Electric Co., Ltd.

Hideaki Mukaida

Masahiro Kobayashi

Hiroshi Mukaiyama

Shigeya Ishigaki

Koji Sato

Norio Sawada

Yoshitaka Hara

Takashi Kawanabe

Atuyumi Ishikawa

Katsuyoshi Oki

Akira Imanaga

Masafumi Ueda

Yoshinori Tohya

Masanori Gotoh

This invention has for its object to eliminate failure of correct recording on a recording medium in an on-vehicle audio recording/reproduction device due to an instantaneous power cut-off or the like. In order to achieve this object, a file system is used for managing files hierarchically by using files having information and a directory as a storage place of a plurality of files so that predetermined information is recorded in a work sector for backup before performing the primary recording. The work sector is selected from a work sector area having a plurality of sectors and the work sector has recorded the number of mountings of the file system. Thus, an optimal work sector is used for data recovery.

Information recording method and information recording/reproduction device

A heat exchanger is provided in which high heat transfer efficiency has been attained by optimizing the slit array and setting an optimum range for the width of a slit and the spacing between slits. Slitsandformed in front of the heat transfer coiland slitsandformed behind the heat transfer coil are arranged so as to provide a mutually different length among adjoining partitioned slits in the vertical direction, as well as a mutually different length between directly opposite partitioned slits in the horizontal direction. As a result, the position at which the slit is partitioned is staggered.

Heat exchanger

In a heat exchanger comprising a number of multilayered fins, and a refrigerant pipe arranged in the meandering form in the fins, and an air conditioner having the heat exchanger, each of the fins has a corrugated portion formed in an air-flow direction thereon, which has at least two wavelike portions for producing a turbulent flow of air having such strength that a temperature boundary layer of the air is broken, but resistance against to the air flow is not excessively high. Each wavelike portion may be designed to have a triangular section or a trapezoidal section, and a flat portion may be disposed between the wavelike portions.

Heat exchanger having corrugated fins and air conditioner having the same

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Daito, Japan

Hideaki Mukaida