Oki Electric Industry Co., Ltd.

Nippon Hoso' Kyokai

Toshiba Ceramics Co., Ltd.

Toshiba Silicone Co., Ltd.

Shin Nippon Air Conditioning Engineering Co., Ltd.

Shin Nippon Kucho Kabushiki Gaisha

Takao Chiba

Yutaka Horie

Nobuyoshi Sakamoto

Yukio Sato

Tetsuo Kawagoe

Shoji Hirose

Yuzo Kimoto

Yoshimichi Kimura

Kenji Kohro

Osamu Yabuta

Yukio Anekoji

Mitsuhisa Fukuda

Disclosed are a cooling and heating medium for an ice-storage system, which comprises a mixture of a water-insoluble antifreezing solution and water, and an ice-storage system which comprises using a mixture of a water-insoluble antifreezing solution and water as a cooling and heating medium, cooling the cooling and heating medium to obtain a mixture of the water-insoluble antifreezing solution and ice particles and circulating the mixture to convey latent heat.

Cooling and heating medium for ice-storage system

A piezoelectric on-off value for air conditioning comprises a bendable metal plate fixed at one end thereof; a valve member mounted on the other end of the metal plate along a ceiling plate, the value member having vent holes corresponding to vent holes in the ceiling plate, and the valve member changing the relative closure of the vent holes when the metal plate is deformed by application of voltage to the piezoelectric ceramic.

Piezoelectric on-off valve for air conditioning

An acoustic surface wave transducer with a transmission interdigital electrode (2A) and a reception interdigital electrode (2B in FIG. 10A-D) on a piezoelectric surface (1) has been improved by reducing inband dispersion of frequency characteristics by providing an edge effect canceler (k.sub.1), which cancels an undesired surface wave (E-a, E-b) generated at the external edge of the extreme end finger of the interdigital electrodes. Said edge effect canceler is constructed so that the length of the extreme end finger (11a) of the interdigital electrode (10, 20 in FIG.5A) is half of the length of the second extreme end finger (12a) of said interdigital electrode, and the spacing between said extreme end finger and the second extreme end finger is 1/2 wavelength of the acoustic surface Wave. Thus, the phase of the undesired surface wave generated by the extreme end finger of the transmission interdigital electrode is opposite to that generated by the second extreme end finger at the reception side, and the strength of the former is the same as that of the latter. Thus, those surface waves are cancelled by each other at the reception side, and the inband deviation or dispersion in amplitude characteristics and/or group delay characteristics of the transducer is improved.

Acoustic surface wave transducer with improved inband frequency

Growing community of inventors

Tokyo, Japan

Takao Chiba