Gas flow controller
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsShigeru Shirai, Yoshio Yamamoto, Yukio Nagaoka
Life of this patent
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Abstract
In regulating a burning gas quantity of a gas combustion apparatus, a gas flow controller is used. The gas flow controller is constructed such that a closing member within a cock is rotated by using a motor. The closing member has a plurality of holes formed in the axial direction of the member and a plurality of grooves each corresponding to the hole and formed in the circumferential direction of the member. The cock is used for changing, opening and closing a plurality of orifice passageways. The motor is driven in accordance with a signal from a position determining unit which discriminates the position of the cock. The gas flow controller can advantageously ensure a high precision of gas flow, a high reduction ratio, and a low power consumption.
Claims14
A gas controller comprising:
- a cock including a closing member and a housing for changing, opening and closing a plurality of passageways;
- a perforated plate having a plurality of orifices corresponding to said plurality of passageways, said perforated plate being provided separately from said cock;
- a motor drive unit for rotating said closing member of said cock;
- a position determining unit including a position signal generator mounted directly on the shaft of said cock and a position judging circuit responsive to a signal from said position signal generator for judging the cock position;
- and
- a drive control unit responsive to a target position signal and a present position from said position determining unit for sending a drive signal to said motor drive unit.
Dependencies are inferred from the claim text.