An air conditioner including an arc shaped discharge port formed in a cylindrical member of a housing; a main fan; an arc shaped heat exchanger between the main fan and an inner peripheral surface of the cylindrical member with respect to a radial direction of the cylindrical member; and an auxiliary fan. A discharge flow path is formed between an outer peripheral end of the heat exchanger and the inner peripheral surface of the cylindrical member. A guide flow path is formed outside the discharge flow path with respect to the radial direction of the cylindrical member. The auxiliary fan is in the discharge flow path and is configured to suck some of the air discharged through the discharge port into the guide flow path. The guide flow path returns the air sucked by the auxiliary fan to the auxiliary fan.

A method of manufacturing a heat exchanger includes providing a first slab having a first plurality of tubes extending from a first end to a second end of the first slab along a first length of the first slab. The method includes providing a second slab having a second plurality of tubes extending from a third end to a fourth end of the second slab along a second length of the second slab. The method includes positioning a first face of the first slab adjacent to a second face of the second slab in a side-by-side configuration and securing a connector to the first end of the first slab and to the third end of the second slab in the side-by-side configuration. The method includes bending the first slab and the second slab together in the side-by-side configuration to form a bent configuration of the heat exchanger.

An object of the present invention is to allow uniform distribution of a refrigerant by a distributor. A refrigerant pipe includes a bent pipe formed in the shape of a curve and a downstream pipe connected to the downstream side of the bent pipe and formed to be linear. A distributor to distribute the refrigerant into a plurality of flow paths is connected to the downstream pipe on the downstream side. An inner wall on the inner peripheral side of the bent pipe being on the side of the curvature center of the curve is a grooved surface with a groove formed therein, and an inner wall on the outer peripheral side of the bent pipe being on the side opposite to the curvature center of the curve is a smooth surface.

An air channeling sub-system may include a mechanical cooling section and a direct evaporative cooling section. The direct evaporative cooling section may be downstream from the mechanical cooling section. Cooling air is channeled through the air channeling sub-system and into the room. If a first set of control conditions is met, the air channeling sub-systems is operated in an adiabatic mode. The adiabatic mode includes channeling cooling air through the direct evaporative cooling section to evaporate water into the cooling air. If a second set of control conditions is met, the air channeling sub-system is operated in a hybrid mode. The hybrid mode includes channeling cooling air through the mechanical cooling section to remove heat from the cooling air and channeling the cooling air through the direct evaporative cooling section to evaporate water into the cooling air.

A floor-positioned air-conditioning apparatus including a housing including a fan and a heat exchanger; a forward blowing control member rotatably arranged at a forward air outlet formed in a housing front surface at a position near a housing top surface; and an upward blowing control member rotatably arranged at an upward air outlet formed near the housing front surface are included. The forward blowing control member closes the forward air outlet and the upward blowing control member closes the upward air outlet during operation stop. The forward blowing control member closes the forward air outlet and the upward blowing control member is rotated and opens the upward air outlet during cooling operation. The upward blowing control member closes the upward air outlet and the forward blowing control member is rotated and opens the forward air outlet during heating operation.

Systems and methods for improved heat exchange performance are disclosed. The system can include a first slab of refrigerant tubes having an upstream side and a downstream side. The system can further include a second slab of refrigerant tubes having an upstream side and a downstream side. The system can additionally include an airflow distribution device configured to distribute air along the first and second slabs. Further, the downstream side of first slab can be set apart a first distance from the downstream side of the second slab and the upstream side of the first slab can be attached to the upstream side of the second slab. The airflow distribution device can include a perforated plate having perforations of various dimensions or various sized vanes positioned in the path of airflow.

An indoor unit of an air-conditioning apparatus includes an air-sending device unit having an air-sending device unit housing configured to house an air-sending device and provided with an air inlet; and a heat exchanger unit having a heat exchanger unit housing configured to house an indoor heat exchanger, provided with an air outlet, and configured to be coupled to the air-sending device unit housing, wherein the air-sending device includes a rotating fan, an electric motor, and a casing, the casing, the air inflow port, and the air-sending device unit housing, a first rail unit, and a slide member.

A heat exchange device and a refrigerant circulation system are disclosed. The heat exchange device includes a housing, defining a first air inlet and a first air outlet; wherein the first air inlet and the first air outlet are spaced apart along a first direction; and a first heat exchange component, arranged in the housing and comprising a plurality of heat exchange fins spaced apart along a second direction; wherein the first heat exchange component is arranged opposite to the first air inlet along a third direction; the second direction is perpendicular to the first direction, and the third direction is perpendicular to the first direction and the second direction.

A heat exchange unit includes a heat exchanger, a first drain pan, and a second drain pan. The heat exchanger is configured to cause heat to be exchanged between air and refrigerant. The first drain pan is provided so as to face the heat exchanger and has an opening through which the air flows. The second drain pan is provided so as to face the heat exchanger and is attached to the first drain pan so as to form an L shape in side view together with the first drain pan. The heat exchange unit is installed in an installation state in which the first drain pan is located below the heat exchanger or in an installation state in which the second drain pan is located below the heat exchanger. The second drain pan includes a rib on a facing surface facing the heat exchanger.

An air conditioner indoor unit includes: a shell having an air inlet and an air outlet, the air outlet is located at the bottom of the shell; and at least one heat exchanger group. The air flows through the air inlet and is subjected to heat exchange via the at least one heat exchanger group, and then flows out from the air outlet. The heat exchanger group includes: a first heat exchanger; a second heat exchanger arranged to be inclined with respect to a first direction, a lower end portion of the second heat exchanger being connected to an upper end portion of the first heat exchanger; a third heat exchanger spaced apart from the first heat exchanger; and a fourth heat exchanger arranged to be inclined with respect to the first direction.