Wall-mounted air conditioner indoor unit

A wall-mounted air conditioner indoor unit, which in heating mode creates hot air comprising:

• a front housing and a rear housing forming a housing of the indoor unit, the housing being provided with main air intake portions, and heat exchangers being disposed inside the housing, wherein a mixed air outlet is formed in a lower portion of the front housing, a non-hot exchange air inlet is formed on the rear housing at a position corresponding to the mixed air outlet, an air delivery apparatus is disposed inside the housing, the air delivery apparatus comprises a plurality of air-duct bodies each having front and rear openings, the plurality of air-duct bodies are sequentially arranged next to one another to form a throughway air passage therethrough, the throughway air passage connects the mixed air outlet and the non-hot exchange air inlet, a n at least one hot exchange air passage is formed between two adjacent air-duct bodies of the plurality of air-duct bodies, a volute and a centrifugal fan located inside the volute are disposed inside the housing and above the air delivery apparatus, an air output portion of the volute faces the at least one hot exchange air passage, the air output portion of the volute includes a surrounding portion that extends to the air delivery apparatus and surrounds the at least one hot exchange air passage, and a plurality of air mixed cavities are formed between the surrounding portion and the at least one hot exchange air passage, wherein the centrifugal fan is a double-suction-type centrifugal fan, an axis of the centrifugal fan is perpendicular to an axis of the air delivery apparatus, and the volute is provided with a first air intake portion and a second air intake portion that are bilaterally symmetrical.

A wall-mounted air conditioner indoor unit, which in heating mode creates hot air comprising:

• a front housing and a rear housing forming a housing of the indoor unit, the housing being provided with main air intake portions, and heat exchangers being disposed inside the housing, wherein a mixed air outlet is formed in a lower portion of the front housing, a non-hot exchange air inlet is formed on the rear housing at a position corresponding to the mixed air outlet, an air delivery apparatus is disposed inside the housing, the air delivery apparatus comprises a plurality of air-duct bodies each having front and rear openings, the plurality of air-duct bodies are sequentially arranged next to one another to form a throughway air passage therethrough, the throughway air passage connects the mixed air outlet and the non-hot exchange air inlet, an at least one hot exchange air passage is formed between two adjacent air-duct bodies of the plurality of air-duct bodies, a volute and a centrifugal fan located inside the volute are disposed inside the housing and above the air delivery apparatus, an air output portion of the volute faces the at least one hot exchange air passage, the air output portion of the volute includes a surrounding portion that extends to the air delivery apparatus and surrounds the at least one hot exchange air passages, and a plurality of air mixed cavities are formed between the surrounding portion and the at least one hot exchange air passages, wherein both orthographic projections of the front housing and the rear housing are circular or approximately circular.