CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a U.S. National Stage Application which claims the benefit under 35 U.S.C. § 371 of International Patent Application No. PCT/KR2018/012139 filed on Oct. 15, 2018, which claims foreign priority benefit under 35 U.S.C. § 119 of Korean Patent Application No. 10-2017-0133855 filed on Oct. 16, 2017 in the Korean Intellectual Property Office, the contents of both of which are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to an air conditioner including an airflow guide unit for guiding airflow blown through a blowing port.

BACKGROUND ART

In general, an air conditioner is a device that removes dust in air while controlling temperature, humidity, airflow, and distribution suitable for human activity using a refrigeration cycle. The refrigeration cycle is composed of a compressor, a condenser, an evaporator, a blowing fan, and the like as main components.

The air conditioner may be classified into a separate type of air conditioner in which an indoor unit and an outdoor unit are separately installed, and an integrated air conditioner in which the indoor unit and the outdoor unit are installed together in one cabinet. The indoor unit of the separate type air conditioner includes a heat exchanger for heat-exchanging air sucked into a panel, a blowing fan for sucking air in a room into the panel and blowing the sucked air back into the room, and a blowing port for discharging airflow generated by the blowing fan.

The airflow blown through the blowing port allows the room to be cooled or heated. At this time, the direction and speed of the airflow not only affect the speed of temperature change in indoor regions and the temperature difference in the indoor regions, but also affect a user's emotion through the airflow.

DISCLOSURE

Technical Problem

The present disclosure is directed to providing an air conditioner capable of inducing airflow blown through a blowing port to blow in a substantially horizontal direction.

The present disclosure is directed to providing an air conditioner capable of minimizing frictional flow losses in inducing a direction of airflow blown through the blowing port.

The present disclosure is directed to providing an air conditioner capable of controlling direction and velocity of airflow.

Technical Solution

The present disclosure provides an air conditioner including a housing further including a blowing port, and an airflow guide unit installed in the blowing port to be rotatable about a rotation shaft, wherein the airflow guide unit includes a main blade configured to cover the blowing port, and a pair of sub blades spaced downwardly apart from the main blade and disposed in a flow passage of the blowing port such that outer surfaces thereof are in contact with airflow in the blowing port as a whole, and having different inclination angles.

The sub blades may include a first sub blade disposed in the blowing port in a state in which the main blade opens the blowing port, and a second sub blade disposed in the rear of the first sub blade.

The first sub blade may have a longer horizontal length than the second sub blade.

The first sub blade may be disposed to be inclined upward toward the front, and the second sub blade may be disposed to be inclined downward toward the front.

The first sub blade may be disposed to be inclined 15 to 20 degrees with respect to a horizontal direction.

The second sub blade may be disposed to be inclined 7 to 12 degrees with respect to a horizontal direction.

The sub blade may be formed in a range of a center angle of 100 to 120 degrees about the rotation shaft.

The sub blade may be formed to have a vertical thickness of 11 to 21 mm.

The main blade may include a plurality of fine discharge ports to allow airflow to be discharged in a state of covering the blowing port.

The main blade may include a first main blade disposed in the front of the blowing port in a state of opening the blowing port, and a second main blade disposed in the rear of the first main blade.

The main blade and the sub blade may be detachably coupled.

Another aspect of the present disclosure provides an air conditioner including a housing including a blowing port, and a pair of blades disposed in the blowing port to have different inclination angles with respect to a horizontal direction in order to guide airflow blown through the blowing port toward the horizontal direction in a state in which an outer surface thereof is in contact with the airflow in the blowing port as a whole.

The blades may include a first blade disposed to be inclined upward toward the front, and a second blade disposed to be inclined downward toward the front.

The first blade may be disposed in the front of the second blade.

The first blade may have a longer horizontal length than the second blade.

The first blade may be disposed to be inclined 16 to 18 degrees with respect to the horizontal direction, and the second blade may be disposed to be inclined 9 to 11 degrees with respect to the horizontal direction.

Another aspect of the present disclosure provides an air conditioner including a housing forming an appearance, a blowing port provided at a lower portion of the housing, a suction port provided at an upper portion of the housing, a first blade disposed to be inclined upward toward the front, and a second blade disposed to be spaced apart from the rear of the first blade and to be inclined downward toward the front.

The first blade may have a longer horizontal length than the second blade.

The first blade and the second blade may be configured to have a cross section of an airfoil shape.

The first blade and the second blade may be configured to have a curved cross-sectional shape convex downward.

Advantageous Effects

Because airflow can be blown in a substantially horizontal direction through a blowing port, cold air does not reach a user directly so that the discomfort that the user may feel due to the cold air can be minimized, and blowing distance of airflow can increase so that the room temperature can quickly reach to a desired heating and cooling temperature.

