Duct-type indoor unit of air conditioner

A duct-type indoor unit of an air conditioner, comprising:

• a casing including
• a front plate in which an inlet duct connection part is formed and defines outer edges of an inlet and to which an inlet duct is connected,
• a rear plate in which an outlet duct connection part is formed and defines outer edges of an outlet and to which an outlet duct is connected,
• an upper plate,
• a lower plate,
• a first side plate, and
• a second side plate,
• the front plate and the rear plate being spaced apart from each other in a longitudinal direction of the casing,
• the upper plate and the lower plate being spaced apart from each other in a first direction which is orthogonal to the longitudinal direction of the casing,
• the first side plate and the second side plate being spaced apart from each other in a second direction orthogonal to the longitudinal direction and the first direction of the casing,
• the upper plate, the lower plate, the first side plate and the second side plate being connected with the front plate and the rear plate;
• a partition member partitioning interior of the casing into a first space on an inlet side and a second space on an outlet side, the partitioning member having a first part extending in a direction orthogonal to the front plate and including an opening that communicates the first space with the second space, a second part that extends in a direction parallel to the front plate, and an inclined part connecting the first and second parts, the first, second;
• and inclined parts being continuous;
• a heat exchanger arranged inside the first space;
• and
• a centrifugal fan having an impeller with a plurality of backward curved blades, the impeller being positioned inside the second space to suck in air in the first space through the opening, wherein
• the impeller as a rotating shaft parallel to the front plate, the inclined part of the partition member inclines with respect to the direction parallel to the front plate from the second part to the first part,
• the partition member is connected to the first side plate and the rear plate,
• the partition member, the upper plate, the lower plate and the first side plate function as a fan casing of the centrifugal fan,
• the heat exchanger is constituted by a first heat exchanger unit and a second heat exchanger unit, the first heat exchanger unit and the second heat exchanger unit being arranged to separate from each other gradually toward the inlet of the casing so as to have an open V-shaped cross section,
• the first heat exchanger unit is along a first imaginary plane,
• the second heat exchanger unit is along a second imaginary plane intersecting the first imaginary plane, and
• an imaginary intersection line by the first imaginary plane and second imaginary plane extends parallel to the rotating shaft.