초록 ▼

A refrigerated display case having a display section within a cabinet and movable door covering the access opening to such display section. The cabinet has top, bottom, rear and side walls with an opening in its front, which opening is covered by the door. An air conduit extends along the top, botto

A refrigerated display case having a display section within a cabinet and movable door covering the access opening to such display section. The cabinet has top, bottom, rear and side walls with an opening in its front, which opening is covered by the door. An air conduit extends along the top, bottom and rear walls of the cabinet. The air conduit has an outlet opening and an inlet opening at opposite ends thereof with the openings being in alignment so that air leaving the outlet opening will be directed towards and received by the inlet opening thereby forming an air curtain across the front opening of the cabinet along the path inside the door. During a refrigeration cycle of operation of the display case, refrigerated air is circulated through the air conduit and a refrigeration mechanism arranged within the conduit by a positive pressure air flow so as to establish a refrigerated air band and a refrigerated air curtain across the front opening in the cabinet. During a defrost cycle of operation, the refrigeration mechanism is turned off and ambient air is circulated through a substantial portion of the air conduit. Such ambient air serves to defrost the refrigeration mechanism and the interior of the air conduit. The ambient air, however, is prevented from flowing into the display section of the display case.

대표청구항 ▼

A refrigerated display case having a display section therein comprising: a cabinet having top, bottom, rear and side walls and an opening at its front; at least one door covering said front opening, said door being movable for enabling access through said front opening to products within said displa

A refrigerated display case having a display section therein comprising: a cabinet having top, bottom, rear and side walls and an opening at its front; at least one door covering said front opening, said door being movable for enabling access through said front opening to products within said display section of said display case; an air conduit extending along said top, bottom and rear walls and having an outlet opening and an inlet opening at opposing ends thereof, said outlet opening and said inlet opening being arranged in alignment so that air leaving said outlet opening will be directed towards and received by said inlet opening and form an air curtain across said front opening along a path inside of said door; an air band establishing means for establishing a flow of refrigerated air through said air conduit during a refrigeration cycle of operation, said air band establishing means including refrigeration means and means for creating a positive pressure air flow through said refrigeration means; and defrost means for defrosting said display case when said display case is operated in a defrost cycle of operation, said defrost means causing ambient air to pass through a substantial portion of said air conduit, including that portion of said air conduit located along said rear wall of said cabinet of said display case, said defrost means causing the ambient air to flow in a reverse direction with respect to the air flow during a refrigeration cycle of operation and passing such ambient air through said refrigeration means for defrosting said refrigeration means and said air conduit while substantially preventing any ambient air flow into said display section of said display case.