Projection device

A projection device, comprising:

• a housing, a projection lens, a first light source module, a first heat dissipation module, and a first fan, wherein:
• the housing comprises a front cover and a rear cover opposite to each other, a first side cover and a second side cover opposite to each other, and an upper cover and a lower cover opposite to each other, the first side cover and the second side cover being respectively connected to the front cover and the rear cover, the upper cover and the lower cover being connected to the front cover, the rear cover, the first side cover, and the second side cover respectively to form an accommodating space, wherein the lower cover has a first air inlet, the first side cover has a second air inlet, and the second side cover has an air outlet;
• the projection lens is disposed in the housing, the projection lens having a disposition direction to divide the accommodating space into a first region and a second region, wherein the first air inlet and the second air inlet are located in the first region, and the air outlet is located in the second region;
• the first light source module, the first heat dissipation module, and the first fan are located in the first region, wherein the first light source module is connected to the first heat dissipation module, and the first heat dissipation module is located between the first air inlet and the first fan;
• the first heat dissipation module comprises a base, at least one first heat pipe, and a plurality of heat dissipation fins, the base being connected to the first light source module, the at least one first heat pipe being perpendicular to the base, and the plurality of heat dissipation fins being parallel to the base;
• and
• the first fan has an air outlet surface and an air inlet surface, the air outlet surface facing the upper cover, the air inlet surface facing the lower cover, wherein an angle between a normal extension direction of the air inlet surface and the first air inlet falls between 30 degrees to 150 degrees.