Prefabricated knockdown clean room

Claim 1

A prefabricated knockdown clean room for providing clean air to a work area comprising a plurality of independent base members located in end-to-end relationship, each of said base members being generally U-shaped in cross section and facing upwardly, a tie plate member bridging each pair of aligned base members, said tie plate members and said base members having interlocking means so that said tie plate members substantially prevent relative lateral and lengthwise movement of contiguous base members, a plurality of independent side wall sections vertically slidably received within said base members, each of said side wall sections having spaced inner and outer panels connected together by end walls, the inner panel of certain of said side wall sections being imperforate and the inner panel of at least one side wall section having at least one return opening therein to permit air within the clean room to enter the space between said inner and outer panels, sealing means attached to the exterior of at least one end wall of each side wall section and engagable with a contiguous side wall section, a roof section including top and bottom panels connected together by end walls and side walls and defining a hollow compartment, generally U-shaped yoke means on at least said end walls of said roof section for slidably receiving the upper portions of said side wall sections and detachably connecting said roof section and side wall sections together, a partition separating said compartment into a plenum chamber and an air return chamber, the space between said panels of said one wall section and said air return chamber being in communication with each other, blower means for moving air from said air return chamber into said plenum chamber, said bottom panel of said roof section having an opening into said plenum chamber, a micro filter extending entirely across said roof section opening so that air from said plenum chamber must be discharged through said micro filter, depending barrier means supported by said roof section adjacent to said roof section opening and extending entirely across said clean room, a work area located directly below said micro filter and said opening, air from said plenum chamber being directly introduced into said work area, said one of said side walls being remotely located from said work area so that the flow of clean air is maintained in a path from said plenum chamber into said work area and subsequently to the remaining portion of the interior of said clean room from which such air is returned to the plenum chamber by way of said one of said side walls and said air return chamber, whereby said base member, side wall sections and roof section may be easily assembled on a relatively flat surface to form a clean room.