Fan/filter unit and clean booth equipeed therewith

A fan/filter unit comprising:

• a casing having formed an air outlet port on a front side thereof and an air inlet port on a rear side thereof;
• a fan housed in the casing so as to face the air inlet port;
• a filter housed in the casing so as to face the air outlet port such that the air discharged by the fan in a widthwise direction of the casing is blown forward through the filter,
• wherein the fan/filter unit has a pair of inward-direction plates so constructed and arranged that a flow of air reflected from widthwise side walls toward the filter is directed to a widthwise midway portion of the filter.

A fan/filter unit comprising:

• a casing having formed an air outlet port on a front side thereof and an air inlet port on a rear side thereof;
• a fan housed in the casing so as to face the air inlet port;
• a filter housed in the casing so as to face the air outlet port such that the air discharged by the fan in a widthwise direction of the casing is blown forward through the filter,
• wherein the fan/filter unit has an outward-direction plate so constructed and arranged that a counter flow of air flowing in the widthwise direction along the filter toward a midway portion thereof as seen in the widthwise direction is directed to the filter at the midway portion.

A fan/filter unit comprising:

• a casing having formed an air outlet port on a front side thereof and an air inlet port on a rear side thereof;
• a fan housed in the casing so as to face the air inlet port;
• a filter housed in the casing so as to face the air outlet port such that the air discharged by the fan in a widthwise direction is blown forward through the filter,
• wherein the fan/filter unit has:
• a shielding plate disposed between the fan and the filter as seen in a depthwise direction of the casing so that the shielding plate shields an associated flow of air to flow in a direction from the filter to the fan;
• a pair of left and right inward-direction shielding plates so constructed and arranged that a flow of air reflected from left and right side walls toward the filter is directed to a midway portion of the filter as seen in a widthwise direction thereof;
• and an outward-direction plate so constructed and arranged that a counter flow of air flowing in the widthwise direction along the filter toward a midway portion thereof as seen in the widthwise direction is directed to the filter at the midway portion.