초록 ▼

An improvement in a refrigerated display case in which an air flow restriction baffle is positioned adjacent to the discharge end of the air conduit containing the defrost ambient air band. The baffle increases the linear velocity of the air band and the air momentum sufficiently to cause the band t

An improvement in a refrigerated display case in which an air flow restriction baffle is positioned adjacent to the discharge end of the air conduit containing the defrost ambient air band. The baffle increases the linear velocity of the air band and the air momentum sufficiently to cause the band to flow away from the access opening of the display case whereby continuous recirculation of the defrost air is avoided. The baffle can form a restricted air flow cross-sectional area which is about 50% to 90% of the cross-sectional area of the air flow conduit immediately proceeding the position of the baffle. A restricted air flow area of these amounts enable a linear velocity increase of about 10% to 100% based on the air band velocities normally used during defrost cycles.

대표청구항 ▼

In a refrigerated display cabinet having outer walls defining a product storage and display space and having an access opening in one of said walls for permitting products to be moved into and out of said storage and display space; at least one air conduit disposed about said storage and display spa

In a refrigerated display cabinet having outer walls defining a product storage and display space and having an access opening in one of said walls for permitting products to be moved into and out of said storage and display space; at least one air conduit disposed about said storage and display space for containing an air band; a refrigeration means; air moving means enabling circulation of an air band within said conduit and across said access opening in a refrigeration cycle of operation; and said air moving means also permitting circulation of an ambient air band during a defrost cycle; the improvement comprising an air flow restriction baffle positioned within said air conduit adjacent to the discharge end of said air conduit when said cabinet is operated in an air defrost cycle, and said air flow restriction baffle operable to increase the velocity of the air band in said conduit during a defrost cycle sufficiently to expel the defrost air band substantially out of said cabinet.