Overhead air conditioner of engineering vehicle

The utility model discloses an engineering vehicle top-mounted air conditioner which comprises an engineering vehicle top, an air conditioner external unit is fixedly installed on the upper surface of the engineering vehicle top, an air conditioner internal unit is arranged on the lower surface of the air conditioner external unit, a boss ring protrusion is arranged on the lower surface of the air conditioner external unit, and the boss ring protrusion is clamped into the inner side surface of the engineering vehicle top. A mounting assembly is arranged on the side face of the lower end of the air conditioner indoor unit, a boss ring protrusion sealing assembly is arranged, sealing is facilitated after mounting, the mounting assembly of a buckling structure is arranged, positioning buckling is achieved after clamping mounting, locking and fixing are achieved in cooperation with hexagon socket screws, punching mounting is not needed, and mounting is convenient and fast. 本实用新型公开了一种工程车顶置空调，包括工程车顶，所述工程车顶的上表面固定安装有