Hitachi Plant Engineering Construction Co., Ltd.

Hitachi, Ltd.

Hidenao Kawai

Minoru Takahashi

Tomio Suzuki

Mitsushi Endo

Tatsuo Yoshitomi

Makoto Tanaka

Kozo Takahashi

Noriyuki Hayakawa

Toshio Onodera

Teruyoshi Sahara

Toshiaki Taniguchi

Teruo Takizawa

Yoshiteru Nagatani

Yutaka Shimokawa

Katsuhiro Joukou

Kazuo Yamagami

Kouji Watanabe

Masayoshi Sakuma

Yoichi Nakagawa

Ryuusuke Gotouda

Yoshihiro Kimoto

Shuichi Kaizyo

The heater has increased quick responsiveness to temperature control of air, and the air conditioner can realize highly accurate temperature control using the heater. A duct unit having heat sources comprising electric lamps in the inside thereof is attached to an air duct. Air coming into contact with glass bulbs of the electric lamps is heated by radiant heat and transferred heat generated by lighting the electric lamps, whereby the heater with increased quick responsiveness to temperature control is obtained. A first heater and a second heater are provided in the air duct, respectively, and temperature sensors for controlling these heaters are attached to the air duct and a precision environment chamber, respectively, whereby temperature control in two stages with different temperature resolutions is made possible, and an air conditioner with high accuracy excellent in controllability can be provided.

Air-conditioning control apparatus using heater

The present invention relates to an air-conditioning and an environmental control device for manufacturing plants of integrated circuits, chemicals and foods, hospitals, etc. where clean air is required. In this environmental control device, controlled air blows out from one side and is absorbed into the other side of the room. The blowing surface and the absorbing surface are divided on the basis of the predetermined module. Ventilating units are formed in a suitable size to conform to the module. Because of the construction, the controlling system of temperature or cleanliness of the air in the environmental control room can be rearranged to an optional one by replacing or changing positions of the ventilating units. Even if a controlling system is rearranged to an optional one, the room should be divided into a supply chamber, a mixing chamber, an environmental control chamber and a return chamber from one side to the opposite side of the room, so that air conditioned can flow as required. Conditioned air enters the supply chamber, and air from the supply chamber and air from the return chamber are mixed in the mixing chamber. The mixed air passes through the ventilating units contained in the mixing chamber to be supplied into the environmental control chamber. The ventilating units have a fan and a high efficiency particulate air (HEPA) filter.

Rearrangeable partial environmental control device

Growing community of inventors

Noda, Japan

Hidenao Kawai