Heating, ventilation and/or air-conditioning apparatus including an air flow channel bypassing a heat exchanger

A heating, ventilation and/or air-conditioning apparatus (1) for a passenger compartment of a motor vehicle, the heating, ventilation and/or air-conditioning apparatus (1) comprising a casing (2) including a first air inlet (3) and a second air inlet (4) and channeling an interior air flow (Fi) coming from the first air inlet (3) or the second air inlet (4), the casing (2) accommodating at least a first heat exchanger (5),

• wherein the casing (2) includes:
• an air circulation channel (24) channeling the interior air flow (Fi) in the casing (2) so that the interior air flow (Fi) bypasses the first heat exchanger (5), and an air inlet duct (23) channeling the interior air flow (Fi) in the casing (2) through the first heat exchanger (5), the air inlet duct (23) is delimited by an exterior wall (13) of the casing (2) and an interior wall (14) arranged in the casing (2), the interior wall (14) also defining, with the exterior wall (13) of the casing (2), the air circulation channel (24), wherein the interior wall (14) is between the first heat exchanger (5) in the air inlet duct (23) and the air circulation channel (24), the interior wall (14) extending from the first air inlet (3) toward the air inlet duct (23) and wherein interior wall (14) begins with a first straight portion at the first air inlet (3), followed by a concave-curved portion that accommodates a second air inlet flap (18), and ends with a second straight portion adjacent an end of the first heat exchanger (5).