A fan assembly includes a shrouded fan rotor (18) having a plurality of fan blades (22) extending from a rotor hub (24) and rotatable about a central axis (20) of the fan assembly and a fan shroud (26) extending circumferentially around the fan rotor (18) and secured to an outer tip diameter of the plurality of fan blades (22). A stator assembly (28) is located downstream of the fan rotor (18), relative to an airflow (14) direction through the fan assembly. The stator assembly (28) includes a plurality of stator vanes (30) extending between a stator hub (32) and a stator shroud (34). A flow control ring (36) is positioned between the fan rotor (18) and the stator assembly (28) to block radial flow migration in an axial spacing between the fan rotor and the stator assembly resulting from a radial flow component of an airflow (14) exiting the fan rotor (18).

A fan assembly (10) includes a shrouded fan rotor (18) having a plurality of fan blades (22) extending from a rotor hub (24) and rotatable about a central axis (20) of the fan assembly, and a fan shroud (26) extending circumferentially around the fan rotor (18) and secured to an outer tip diameter of the plurality of fan blades (22). A fan casing (16) encloses the shrouded fan rotor (18). The fan casing (16) defines a fan inlet (30) of the fan assembly and includes an inlet extension (54) at an outer diameter of the fan casing, extending axially upstream of a conventional bell mouth inlet (58), relative to a direction of airflow through the shrouded fan rotor (18).

Provided is a portable air conditioner. The portable air conditioner includes at least a housing having an internal space, a heat exchanger provided in the internal space and heat-exchanged with external air introduced from the outside, a blower fan configured to generate a negative pressure in the internal space so that the external air is introduced, the blower fan allowing the heat-exchanged external air to move upward, a discharge port configured to guide the upwardly guided external air to the outside of the housing, an accommodation part provided inside the housing to accommodate a temperature sensor, and a communication groove configured to allow the accommodation part and the internal space of the housing to communicate with each other so that the external air moves into the internal space of the housing via the accommodation part.

Provided is a portable air conditioner. The portable air conditioner includes at least a housing having an internal space, a heat exchanger provided in the internal space and heat-exchanged with external air introduced from the outside, a blower fan configured to generate a negative pressure in the internal space so that the external air is introduced, the blower fan allowing the heat-exchanged external air to move upward, a discharge port configured to guide the upwardly guided external air to the outside of the housing, an accommodation part provided inside the housing to accommodate a temperature sensor, and a communication groove configured to allow the accommodation part and the internal space of the housing to communicate with each other so that the external air moves into the internal space of the housing via the accommodation part.

Provided is a portable air conditioner. The portable air conditioner includes at least a housing provided with a heat exchange chamber, a first heat exchanger heat-exchanged with external air introduced through a first side surface of the housing, a second heat exchanger heat-exchanged with external air introduced through a second side surface of the housing, which is disposed at an opposite to the first side surface of the housing, a first guide part configured to guide the external air, which is heat-exchanged with the first heat exchanger, to a front part of the heat exchange chamber, a second guide part configured to guide the external air, which is heat-exchanged with the second heat exchanger, to a rear part of the heat exchange chamber, and a blower fan provided to pass through a partition wall and configured to discharge the external air.

Provided is a portable air conditioner. The portable air conditioner includes at least a housing provided with a heat exchange chamber, a first heat exchanger heat-exchanged with external air introduced through a first side surface of the housing, a second heat exchanger heat-exchanged with external air introduced through a second side surface of the housing, which is disposed at an opposite to the first side surface of the housing, a first guide part configured to guide the external air, which is heat-exchanged with the first heat exchanger, to a front part of the heat exchange chamber, a second guide part configured to guide the external air, which is heat-exchanged with the second heat exchanger, to a rear part of the heat exchange chamber, and a blower fan provided to pass through a partition wall and configured to discharge the external air.

A centrifugal air-sending device includes an impeller that includes blades and a scroll casing that includes a bell mouth. Each of the blades is formed such that a vane length of the blade decreases from a portion of the blade close to a main plate toward a portion of the blade close to a side plate. Each of the blades includes a first vane portion that includes an outer circumferential end and that is connected to the side plate, and a second vane portion that includes an inner circumferential end, a turbo vane that forms a backward-curved blade, and a portion close to the main plate in an axial direction of a rotation axis that protrudes further inward than the bell mouth. The blades are formed such that a blade outer diameter is larger than an inner diameter of the bell mouth.

A centrifugal air-sending device includes an impeller that includes blades and a scroll casing that includes a bell mouth. Each of the blades is formed such that a vane length of the blade decreases from a portion of the blade close to a main plate toward a portion of the blade close to a side plate. Each of the blades includes a first vane portion that includes an outer circumferential end and that is connected to the side plate, and a second vane portion that includes an inner circumferential end, a turbo vane that forms a backward-curved blade, and a portion close to the main plate in an axial direction of a rotation axis that protrudes further inward than the bell mouth. The blades are formed such that a blade outer diameter is larger than an inner diameter of the bell mouth.

A diffuser, which is used in an air conditioner, includes a central portion where a motor is disposed, and a plurality of blades radially disposed on an outer circumferential surface of the central portion and arranged at regular intervals along the outer circumferential surface of the central portion. An outer guide wall is disposed concentrically with the central portion and is formed to surround the plurality of blades. The outer guide wall includes a plurality of openings formed in a plurality of portions each of which corresponds to a space between two adjacent blades among the plurality of blades.

A mobile air conditioner includes a circulation device for collecting hot wasted air and wasted water produced by the mobile air conditioner. The circulation device includes a water tank and a radiating pipe mounted in the water tank. The radiating pipe has a first end connected to an air blower and a second end connected to an air draining device. The air draining device has an outlet provided with an active carbon. The wasted water is collected in the water tank. The hot wasted air flows from the air blower into the radiating pipe which is immersed in the wasted water of the water tank. The hot wasted air is cooled by the wasted water and is filtered by the active carbon to release a clean air.