Refrigeration door system and door assembly with defrosting and related methods

A door assembly for a refrigeration door system with a defrosting feature, the door assembly comprising:

• a door frame;
• a sliding door coupled to the door frame, the sliding door switching between an open position providing access to a refrigerated cavity and a closed position where the refrigerated cavity is inaccessible;
• the door frame comprising
• a top member having a first end and a second end opposite the first end,
• a first side member coupled transversely to the first end of the top member and having a side conduit therein,
• a second side member coupled transversely to the second end of the top member, and
• a medial member coupled transversely to the top member between the first end and the second end of the top member, the medial member having a medial conduit therein;
• a first heated pressure source coupled to the top member and configured to output heated air into the side conduit;
• a second heated pressure source coupled to the top member and configured to output heated air into the medial conduit;
• and
• a proximal molding section adjacent a proximal end of the sliding door and cooperating with the medial member to define the medial conduit when the sliding door is in the closed position;
• the proximal molding section comprising first and second proximal molding strips adjacent an outer surface of the sliding door.

A method for making a refrigeration door system with a defrosting feature, the method comprising:

• coupling a door assembly to be carried by a housing and providing access to a refrigerated cavity, the door assembly comprising
• a door frame and a sliding door coupled to the door frame, the sliding door switching between an open position providing the access to the refrigerated cavity and a closed position where the refrigerated cavity is inaccessible,
• the door frame comprising
• a top member having a first end and a second end opposite the first end,
• a first side member coupled transversely to the first end of the top member and having a side conduit therein,
• a second side member coupled transversely to the second end of the top member, and
• a medial member coupled transversely to the top member between the first end and the second end of the top member, the medial member having a medial conduit therein;
• positioning a first heated pressure source coupled to the top member and configured to output heated air into the side conduit;
• and
• positioning a second heated pressure source coupled to the top member and configured to output heated air into the medial conduit;
• the door assembly comprising a proximal molding section adjacent a proximal end of the sliding door and cooperating with the medial member to define the medial conduit when the sliding door is in the closed position;
• the proximal molding section comprising first and second proximal molding strips adjacent an outer surface of the sliding door.