To improve heating capacity by increasing the exhaust heat of an engine, in an engine heat pump type air-conditioning device utilizing the exhaust heat of the engine as a heat source.
An outside air introduction duct 30 and an internal air introduction duct 31 are connected to the air inlet of an air cleaner 29 communicated with the intake air port 25 of an engine 1 and purifying intake air to the engine 1. A door 36 to open and close the outside air introduction duct 30 and the internal air introduction duct 31 is arranged at the air inlet and outside air through the outside air introduction duct 30 and internal air through the internal air introduction duct 31 are switched by the door 36 for introduction to the air cleaner 29. The switching is automatically controlled by a control device 43 according to an outside air temperature detected by a temperature sensor 34.
ENDO KOICHI
FURUHATA ICHIRO
