Sharp Kabushiki Kaisha Corporation

Yasukata Takeda

Hideo Nojima

Yoshinori Sekoguchi

Toshiaki Takano

Kazuo Nishikawa

Mamoru Morikawa

Katsutoshi Noguchi

Masaki Ohtsuka

Akio Miyata

Takeshi Furukawa

Takashi Kohama

Hiroyasu Yamashita

Fumiaki Shimizu

Tomohisa Ito

An operation noise control method for an air conditioner includes: a step (S) of detecting an operation mode of the air conditioner; a step (S) of operating an air flow guide panel () in accordance with the detected operation mode and controlling the air flow guide panel () so as to form a duct-like outlet passage () in a vicinity of an outlet (); a step (S) of selecting a sound wave which is preset in accordance with the operation mode; and a step (S) of radiating the selected sound wave in the duct-like outlet passage () from a speaker ().

Operational noise control method for air conditioner

In an air conditioner, an air flow guide panel () and a speaker () are provided in a vicinity of an outlet (). The air flow guide panel () is operable to form a duct-like outlet passage () in the vicinity of the outlet (), and, in the duct-like outlet passage (), a speaker () radiates a sound wave for canceling out operation noise including blower sound of a fan ().

Air conditioner

A propeller fan with two blades includes a blade and a blade, and a connection portion connecting the blades together. Each blade has a peripheral edge portion extending in an arc having a diameter D with a center axis as a center thereof, a front edge portion arranged on a forward side in a rotational direction, a rear edge portion arranged on an opposite side in the rotational direction, and a leading blade edge portion connecting the front edge portion and the peripheral edge portion. A plane which includes each intersection between the rear edge portion and the peripheral edge portion and is perpendicular to the center axis is defined as &#x3b3;. When the propeller fan is viewed in a direction parallel to a plane including the leading blade edge portions and the center axis, a distance H between plane &#x3b3; and a connected portion between the front edge portion of the blade and the rear edge portion of the blade, on a line of the center axis, satisfies 0.028&#x2266;H/D&#x2266;0.056. With such a structure, a propeller fan, a molding die, and a fluid feeder which make a significant contribution in terms of energy-saving properties and resource-saving design can be provided.

Propeller fan, molding die, and fluid feeder

An ion generating device generates O(HO)(where n is a natural number) as negative ions and H(HO)(where m is a natural number) as positive ions, and discharges those ions into the air so that airborne germs are killed through an oxidation reaction by hydrogen peroxide HOor radical hydroxyl OH generated through as an active species a chemical reaction between the negative and positive ions. Satisfactory sterilization is achieved when the negative and positive ions are generated in such a way that the concentrations of the negative and positive ions are both 10,000 ion/cc at a distance of 10 cm from the point at which they are generated.

Sterilization method, ion generating device, ion generating apparatus, and air conditioning apparatus

Sterilization method

An air conditioning apparatus incorporates an ion generating device that generates positive and negative ions by applying an alternating-current voltage between electrodes. The generated positive and negative ions coexist in the air and, when they attach to the surfaces of airborne bacteria, they react chemically with each other and generate radical hydroxyl and hydrogen peroxide, which extract hydrogen atoms from the cells of the bacteria and thereby kill them. This sterilizing effect is combined with the temperature-conditioning, dehumidifying, humidifying, air-purifying, and other functions of the air conditioning apparatus to bring about a comfortable and healthful indoor environment.

Air refining device and ion generator used for the device

Growing community of inventors

Osaka, Japan

Yasukata Takeda