Smoke Exhaust With An Air Curtain Fan

A smoke exhaust comprising:

• a casing being hollow and having
• an outside wall;
• an inside wall;
• an inside wall;
• a top;
• a bottom;
• a partition board mounted in the casing between the outside and inside walls;
• an air chamber defined in the casing between the partition board and the inside wall and having
• a lower inlet defined through the inside wall near the bottom and communicating with the air chamber;
• and
• an upper inlet defined through the inside wall near the top, communicating with the air chamber and being higher than the lower inlet;
• an air duct defined in the casing between the partition board and the outside wall and having
• a mounting hole mounting hole defined through the partition board and communicating with the air duct and the air chamber;
• and
• an air outlet defined through the top of the casing and communicating with the air duct;
• and
• a smoke collecting eaves mounted on and protruding laterally from the top of the casing, corresponding to the inside wall and having a front end and a bottom surface;
• a suction fan mounted securely through the through hole, being capable of generating airflow from the upper and lower inlets to the air outlet and having a suction portion;
• and
• an air curtain fan mounted on the bottom surface of the smoke collecting eaves, being capable of generating downward air curtain and having
• an air inlet hole defined through the air curtain fan and the smoke collecting eaves;
• and
• an air outlet hole defined through the air curtain fan and facing downward.