NOVELTY - The unit (10) has a fan case (120) that includes a discharge hole (123) located on opposite side to an air-intake hole (122). A flow path where the air which is inhaled from air-intake hole and passed through outer peripheral side edge portion from inner peripheral side edge portion when impeller (110) is rotated by rotation operation transmitted from electric motor (200) is induced to discharge hole along a side wall (121). A casing (300) is provided with outer surface (302a) to which the fan case is attached, and a temperature harmony object is accommodated within the casing.    USE - Temperature harmony unit of temperature harmony system mounted in vehicle such as electric vehicle and hybrid vehicle, for performing temperature harmony of temperature harmony object such as secondary battery, vehicle-mounted secondary battery, power converter device and vehicle-mounted power converter device (all claimed). Can also be used in electrical storage apparatus, inverter apparatus and electric motor.    ADVANTAGE - The temperature harmony unit can reduce the height in which the fan case protrudes from the casing, so that the temperature harmony unit can attain space saving by size reduction. The temperature harmony unit can guide directly the flow of the air discharged from the impeller in the casing, so that the flow of the air discharged from the impeller can reduce the quantity which collides by the inner wall surface of the fan case. The temperature harmony unit can suppress the utilization of the flow path comprised with the fan case, and the high efficiency of the air conditioning of the temperature harmony unit is attained while attaining energy saving. The temperature harmony unit does not cause an excess vibration or noise.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for vehicle.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the temperature harmony unit.    Temperature harmony unit (10)    Impeller (110)    Fan case (120)    Side wall (121)    Air-intake hole (122)    Discharge hole (123)    Electric motor (200)    Casing (300)    Outer surface (302a)