초록 ▼

An improved air vent throat of indoor ventilating device capable of preventing noise where in an outlet throat is installed at the air exhaust port to connect the vent windpipe of the device for bettering the air flow and vibration, a concave check valve toward the direction of the device is provide

An improved air vent throat of indoor ventilating device capable of preventing noise where in an outlet throat is installed at the air exhaust port to connect the vent windpipe of the device for bettering the air flow and vibration, a concave check valve toward the direction of the device is provided inside the throat so as to exhaust the air flow which has an action of enlarging the air flowing out through the throat and check valve to prevent the air flowing back into the door when the device is stopped running. The bent windpipe is inwardly extended and gradually enlarged from the air inlet end thereof and then gradually narrowed toward the air outlet and thereof to be an air flow connecting and shifting device so that the exhausted air flow is a laminar flow and the air resistance is minimized through such a shape of the windpipe to improve the noise generated by the air vibration.

대표청구항 ▼

In an improved air vent throat of an indoor ventilating device capable of preventing noise comprising: an outlet throat coupled between an air exhaust port of said device and a bent windpipe which comprises: said outlet throat having an inclined hole corresponding to the position of said air exhaust

In an improved air vent throat of an indoor ventilating device capable of preventing noise comprising: an outlet throat coupled between an air exhaust port of said device and a bent windpipe which comprises: said outlet throat having an inclined hole corresponding to the position of said air exhaust port of indoor ventilating device; a concave check valve pivotally installed on said outlet throat at the top of said inclined hole capable of making the air easily flow out of the device but impossible flow into the device when the indoor ventilating device stops running; said check valve tightly closes said inclined hole as a whole via its own gravity; said bent windpipe inwardly extended and gradually enlarged from an air inlet end connected to said outlet throat and then outwardly extended and gradually marging with an air outlet end through a bent portion of said bent windpipe so as to be an air flow connecting and shifting device to exhaust the air flow as a Laminar to avoid the noise derived from the air vibration; said concave check valve inside said outlet throat includes a concave arched surface outwardly projected in the air flowing out of said bent windpipe and inwardly recessed in the direction of said indoor ventilating device.