Patent ID: 8262988

Claim:
An antigen supply device for supplying antigens to an antigen exposure chamber having an outdoor air diffuser, comprising: a cylindrical member extending in a vertical direction and having an upper end and a lower end; an air suction port disposed at the lower end of the cylindrical member for sucking air in the antigen exposure chamber into the antigen supply device; an axial fan that generates a flow of air flowing upward in an axial direction of the cylindrical member being disposed within the cylindrical member at the lower end of the cylindrical member above the air suction port; and a supply port, through which high-concentration antigens are jetted from a dust feeder on the outside of the antigen exposure chamber downward into the cylindrical member, disposed in the cylindrical member between the upper end and the lower end of the cylindrical member, wherein the antigen supply device is disposed near the outdoor air diffuser of the antigen exposure chamber, and is configured to blow out high-concentration antigens, which are supplied from the dust feeder disposed on the outside of the antigen exposure chamber, toward the outdoor air diffuser from an upper end of the cylindrical member after mixing the antigens with the air in the antigen exposure chamber sucked from the air suction port and diluting the antigens, and moreover mix the antigens with outdoor air from the outdoor air diffuser to fill the antigen exposure chamber with the mixture of the antigens and the outdoor air.