Kabushiki Kaisha Toyota Chuo Kenkyusho

Toyota Jidosha Kabushiki Kaisha

Katsuhito Yamada

Kenji Fujikake

Haruo Katagiri

Hiroshi Aoki

Takahiko Asaoka

Masuji Oshima

Norihiro Amano

Tamotsu Hasegawa

Tomohisa Wakasugi

Kazutaka Hiroshima

Yutaka Ohya

Takashi Simazu

A humidifier device for use in fuel cells comprising a mist humidifier unit for adding mists to process gas supplied to an electrolyte equipped in a fuel cell and a humidifier unit control device for intermittently operating the mist humidifier unit in accordance with operating condition of the fuel cell.

Humidifer device for fuel cells and operating system thereof

In an electric furnace including a heating device which includes a cooling water passage for cooling the heating device to prevent the heating device from melting, estimation of a molten metal temperature in the electric furnace using a heat equilibrium model is conducted taking into account a thermal loss by the cooling water, i.e., the amount of a heat taken away by the cooling water. Further, the amount of the cooling water flowing through the heating device is adjusted so that the thermal loss by the cooling water is in a predetermined optimum thermal loss range.

Temperature control method and apparatus for an electric furnace

An axial flow fan having auxiliary blades which includes a hub rotatably supported and driven by a drive source, a plurality of fan blades extending radially outwardly from the hub and at least one auxiliary blade projecting from an outer part on a suction and/or pressure surface of the fan blade and extending in the chord-length direction in such a manner that the leading region of the auxiliary blade is located nearer to the central axis of the fan than the trailing region thereof. A supplementary angle .theta..sub.0 of an angle formed between a chord line connecting to a leading edge and a trailing edge of the outer auxiliary blade and a reference line decided by the shape or operation of the fan blade has the relation; 5.degree..ltoreq..theta..sub.0 .ltoreq.40.degree.. A supplementary angle .theta..sub.N of an angle formed between a chord line connecting to a leading edge and a trailing edge of the inner auxiliary blade and a reference line decided by the shape or operation of the fan blade also has the relation; 18.degree..ltoreq..theta..sub.n .ltoreq.50.degree.. The axial flow fan serves to produce a strong radial flow by auxiliary blades of the optimum positional relation as described and improves the aerodynamic performances of the fan such as the air flow rate, efficiency and noise level.

Axial flow fan with auxiliary blades

An axial flow fan having an auxiliary blade wherein a hub member is rotatably supported and driven by a drive source, a plurality of blades are provided having a predetermined angle with respect to the rotational direction thereof and a predetermined width and height, the blades being radially provided on the hub member, and at least one auxiliary blade is disposed on at least one of a suction and pressure surface of the blades and extends beyond an end portion of a trailing edge thereof and substantially within a predetermined length in the width direction of the blade of the surface thereof, a leading edge of the auxiliary blade being positioned closer to an axis of the fan than a trailing edge of the auxiliary blade. The axial flow fan having such an auxiliary blade increases the radial flow by the extending portion of the auxiliary blade.

Axial flow fan having auxiliary blade

An axial flow fan having auxiliary blades comprises a hub member rotatably supported and driven by a drive source, a plurality of main blades having a predetermined angle with respect to the rotational direction thereof and a predetermined width and height, the main blades being radially provided on the hub member, at least one auxiliary blade formed on at least one of a suction surface and a pressure surface of each main fan blade and having a predetermined length in the width direction of the main fan blade, a leading edge of the auxiliary blade being positioned closer to the axis of the main fan blade than a trailing edge of the auxiliary blade, a shroud comprising a thin hollow member having a large opening and a small throttled opening at opposite ends thereof, and the main fan blade being inserted within the shroud from the small throttled opening toward the large opening of the shroud. An axial inserted width L of the main fan blade, which is defined by a point of minimum opening of the small throttled opening and an inserted end portion of the inserted main fan blade in the axial direction, and an axial entire width W of the main fan blade are maintained in the following relation:

Axial flow fan having auxiliary blades

An axial flow fan includes a plurality of auxiliary blades disposed upon and projecting from the suction and/or pressure surfaces of primary fan blades radially disposed on a hub member. The auxiliary blades extend substantially in the width direction or transversely of the primary blades, and the leading edges of the auxiliary blades, as viewed in the rotational axis direction of the fan, are disposed closer to the rotational center of the hub member than the trailing edges of the auxiliary blades. In this manner, the axial flow fan produces an axial fluid flow by means of the primary blades and a radial fluid flow by means of the auxiliary blades.

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Nagoya, Japan

Katsuhito Yamada