Method for solving problem of air supply uniformity in large-area, large-space and high-precision environment

The invention discloses a method for solving the problem of air supply uniformity in a large-area, large-space and high-precision environment. A horizontal air supply and horizontal air return mode is adopted in the method, wherein the horizontal air supply means to supply air to the large space through a horizontal air supply sandwich wall, and the air supply side of the horizontal air supply sandwich wall is formed by an air supply lug boss orifice plate; and the air supply lug boss orifice plate comprises an orifice plate in which holes are uniformly distributed and conical lug bosses, air flues are arranged in the conical lug bosses, the air inlets of the air flues are big, the air outlets of the air flues are small, a conical lug boss is fixed in each hole of the orifice plate, the porosity k of the orifice plate is 0.2 to 5 percent, the escape velocity of the holes is less than 4 meters per second, and the ratio of the air flow velocity vertical to the escape direction of the holes before the flow escap