Matsushita Electric Industrial Co., Ltd.

Matsushita Reiki Company, Limited

Fumitoshi Saito

Toshio Uetsuji

Sotomitsu Maeda

Tatsuya Sakanashi

Toyotoshi Uemura

Hiromi Matsuki

When a computer issues a reading request for data stored in a storage medium, it is judged whether or not the respective data for which the reading request is issued are in cache hit with data that are stored in a read buffer. Only data which are not in cache hit among the data for which the reading request is issued are read out from the storage medium, so as to be buffered in the read buffer. The data for which the reading request is issued are transferred from the read buffer to the computer, and data at addresses which are subsequent to the data for which the reading request is issued are pre-read from the storage medium and buffered in the read buffer so as to be continuous with the buffered read data. Thereby, it is possible to utilize cache data efficiently and effectively.

Data caching method

A hermetic motor compressor comprises a casing which includes a dome-like upper casing and a dome-like lower casing. Each of the upper and lower casings has an engagement portion for telescopically engaging with each other. The stiffness of the upper casing is increased by making at least three corner portions close to the engagement portion. Crescent-shaped portions, curved surfaces, an apex portion and crest lines are also provided for the upper casing. This specific structure of the upper casing may be made also for the lower casing, and when both of the upper and lower casings have such construction, the corner portions of the upper casing and the corner portions of the lower casing are arranged alternatively so that the vibrating modes of respective casings offset each other. The shape of the entire casing may be spherical or ellipsoidal.

Hermetic motor compressor

Growing community of inventors

Yawata, Japan

Fumitoshi Saito