In the present invention, a wind direction is not directly changed using a wind direction adjusting wing and a guide related thereto, but the wind direction is changed due to the Coanda effect and the vortex formation. A basic principle of the present invention of adjusting a wind direction by applying a Coanda effect is to design the air ventilation apparatus such that a wind direction is adjusted upward or downward by causing a Coanda effect on one curved surface of the air ventilation apparatus connected to a skin surface of a dashboard garnish and preventing the Coanda effect from being caused on an opposite surface. In addition to the Coanda effect, a structure for artificially forming a vortex is added to the air ventilation apparatus to maximize the Coanda effect.

An air-conditioning indoor unit includes a blow-out port, a Coanda vane and a controller. The Coanda vane is-provided in proximity to the blow-out port. The Coanda vane turns the blown air into a Coanda airflow along a bottom surface of the Coanda vane. The controller performs a control in which a direction of the Coanda airflow is directed in a first direction by positioning the Coanda vane in a first orientation, and the direction of the Coanda airflow is directed in a second direction different from the first direction by positioning the Coanda vane in a second orientation different from the first orientation.

In an air conditioner, a drain extraction unit and a refrigerant pipe connecting unit may be disposed in a blocking region in which a discharge port is not provided so that a size of the discharge port may be secured and the discharge port may be uniformly disposed, thereby generating uniform airflow in a room. In a lower housing formed in a circular shape, some of components inside an indoor unit of the air conditioner may be disposed in a protrusion portion that protrudes from the circular housing, thereby facilitating the installation of the air conditioner. A condensate water collecting space disposed outside the housing may be provided in a drain tray, thereby efficiently preventing a leakage due to condensate water generated outside the housing. The housing, the drain tray, and the cover member of the air conditioner may be coupled by a coupling member coupled outside.

An air conditioner (AC) indoor unit includes a housing having an inlet and an outlet; a heat exchanger arranged inside the housing; a blower fan for sucking in air at the inlet to be subject to heat exchange with the heat exchanger, and discharging the heat-exchanged air out of the outlet; and an air flow control device for controlling an air flow discharged from the outlet by sucking in air around the outlet. The AC indoor unit may control the direction of a discharged air flow without a conventional blade structure, thereby increasing an amount of discharged air, reducing circulation noise, and enabling design differentiation.

An air conditioner (AC) indoor unit includes a housing having an inlet and an outlet; a heat exchanger arranged inside the housing; a blower fan for sucking in air at the inlet to be subject to heat exchange with the heat exchanger, and discharging the heat-exchanged air out of the outlet; and an air flow control device for controlling an air flow discharged from the outlet by sucking in air around the outlet. The AC indoor unit may control the direction of a discharged air flow without a conventional blade structure, thereby increasing an amount of discharged air, reducing circulation noise, and enabling design differentiation.

An ion/ozone wind generation device includes a plurality of electrode pairs having a needle-shaped electrode and an opposite electrode, ions, ozone, and ion wind being generated using corona discharge by generating a potential difference between the respective electrode pairs. In this device, the opposite electrode in each of the electrode pairs is formed into a planar and annular or spiral shape, a main electrode pair as a pair of electrodes and a plurality of sub-electrode pairs as electrode pairs in which the opposite electrodes are regularly located adjacent or proximate to each other so as to surround the opposite electrode in the main electrode pair along an outer circumference of the opposite electrode in the main electrode pair are provided, and planar normal vectors in all the opposite electrodes are directed in substantially the same directions.

An air conditioner includes a housing having a suction port and a discharge port, a main fan configured to draw air into the housing through the suction port and discharge air from the housing through the discharge port, an auxiliary fan configured to draw, into the housing, air discharged by the main fan and a controller configured to control a rotational speed of the auxiliary fan to change a direction in which air is discharged from the housing.

A bladeless fan assembly for creating an air current includes a nozzle mounted on a base housing a device for creating an air flow. The nozzle includes an interior passage for receiving the air flow and a mouth for emitting the air flow. The nozzle defines, and extends about, an opening through which air from outside the fan assembly is drawn by the air flow emitted from the mouth. The nozzle also includes a heater for heating the air flow upstream of the mouth.

An air-conditioning indoor unit causes a flow of air blown out from a blow-out port to be diverted in a predetermined direction due to the Coand{hacek over (a)} effect. The air-conditioning indoor unit includes an airflow direction adjustment vane varying a blowout angle of blown air relative to a horizontal plane, a Coand{hacek over (a)} vane turning the blown air into a Coand{hacek over (a)} airflow along a bottom surface, and a control unit. The Coand{hacek over (a)} vane is provided in proximity to the blow-out port. The control unit executes an airflow direction automatic switching mode automatically switching between a Coand{hacek over (a)} effect use state in which the blown air is turned into a Coand{hacek over (a)} airflow along a predetermined surface and diverted in the predetermined direction, and a normal state in which the Coand{hacek over (a)} airflow is not created. The airflow direction adjustment vane and the Coand{hacek over (a)} vane having incline angles relative to a horizontal plane that are variable.

A ventilation apparatus blows air into a vehicle compartment of a vehicle. The ventilation apparatus has a blower, a duct, a blowing outlet, guide vanes, and a turning mechanism. The blowing outlet is provided with the duct. The blowing outlet guides the air to flow along a lower surface of the duct. The guide vanes change a flow velocity component of the air in a lateral direction of the vehicle by guiding the air to flow along the guide vanes. The guide vanes are arranged in the duct on an upstream side of the blowing outlet and distanced from each other in the lateral direction. According to the above-described configuration, it is possible to provide a ventilation apparatus that can change a flow direction of air in the lateral direction of the vehicle while suppressing a pressure loss of air and a damage of the ventilation apparatus.