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 door coupled to the door frame, the 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, the top member having a top conduit therein,
• a first side member coupled transversely to the first end of the top member and having a first conduit therein, the first conduit being fluidly coupled to the top conduit,
• a second side member coupled transversely to the second end of the top member and having a second conduit therein, the second conduit being fluidly coupled to the top conduit,
• a plurality of orifices positioned along the first side member and the second side member and being adjacent to the door when in the closed position, and
• a plurality of gasket pieces carried by the first side member and the second side member, the plurality of gasket pieces being spaced apart and defining an air channel between each of the first side member and the second side member and adjacent portions of the door,
• at least one positive pressure source fluidly coupled to the top member and configured to output air into at least first and second conduits and through the plurality of orifices;
• and
• at least one heating device configured to heat the air from the at least one positive pressure source.

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 door coupled to the door frame, the 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, the top member having a top conduit therein,
• a first side member coupled transversely to the first end of the top member and having a first conduit therein, the first conduit being fluidly coupled to the top conduit,
• a second side member coupled transversely to the second end of the top member and having a second conduit therein, the second conduit being fluidly coupled to the top conduit,
• a plurality of orifices positioned along the first side member and the second side member and being adjacent to the door when in the closed position, and
• a plurality of gasket pieces carried by the first side member and the second side member, the plurality of gasket pieces being spaced apart and defining an air channel between each of the first side member and the second side member and adjacent portions of the door;
• positioning at least one positive pressure source to be fluidly coupled to the top member and configured to output air into at least first and second conduits and through the plurality of orifices;
• and
• coupling at least one heating device to heat the air from the at least one positive pressure source.