A door, in particular vertical-lift door, for closing an opening in a wall, in particular in a wall which separates two different temperature zones from one another, having a movable, flexible door leaf which comprises multiple separate, flexible door leaf layers which are guided such that they are spaced apart from one another in the closed state of the door, and having at least one winding shaft onto which the door leaf can be wound up in order to open the door, in which two adjacent door leaf layers are connected to one another by at least one spacer which ensures a spacing, defined by the spacer, of the two door leaf layers at least in the region of the spacer in the closed state of the door.

A system for heating a door guide area includes: a first and second conduit for channeling a flow of heated air; a heater fluidly connected to the first conduit and configured to provide air to the first and second conduits; first and second openings providing fluid communication between the first and second conduits to allow the air to circulate through the first and second conduits; a heat transfer wall part of the second conduit, to transfer heat from the flow of heated air in the second direction to a space outside of the second conduit that is defined, in part, by the heat transfer wall; and two side supports connected to the heat transfer wall, the side supports located opposing each other and dimensioned and located along with the heat transfer wall to form three sides to encompass a portion of a roll-up door.

The invention relates to an enclosure for refrigerating chambers, suitable for closing an access (3) to a refrigerating chamber and comprising: —a sliding refrigerating door (1), and —a quick-opening door (2), both assembled on the same side of the chamber, comprising a frame with vertical posts (4), comprising: —on an outer face, at least one mouth (42) wherein a fan (6) is coupled which introduces air in the corresponding vertical post (4); —on the inside thereof, a deflector plate (61) which directs the air towards electrical resistors (7) for heating the air, situated underneath the deflector plate and, —on an inner face, an outlet (43) for supplying hot air on one of the surfaces, inner or outer, of the flexible sheet (21) exposed to the cold of the chamber and removing frost from said flexible sheet (21).

A roll-up door assembly includes a first curtain, a second curtain, and a side frame. The first curtain and the second curtain can transition between a lowered position and a raised position. The first curtain and the second curtain at least partially define an internal volume in the lowered position. The side frame includes an elongated body defining a hollow interior, a pair of curtain tracks, a heating assembly, and an inlet assembly. The pair of curtain tracks can guide the first curtain and the second curtain between the lowered position and the raised position. The heating assembly can circulate heated air into the internal volume. The inlet assembly can provide fluid commination between the heating assembly and a lower temperature conditioned space such that the heating assembly can circulate air from the lower temperature conditioned space into the internal volume.

A system for heating a door guide area includes: a first and second conduit for channeling a flow of heated air; a heater fluidly connected to the first conduit and configured to provide air to the first and second conduits; first and second openings providing fluid communication between the first and second conduits to allow the air to circulate through the first and second conduits; a heat transfer wall part of the second conduit, to transfer heat from the flow of heated air in the second direction to a space outside of the second conduit that is defined, in part, by the heat transfer wall; and two side supports connected to the heat transfer wall, the side supports located opposing each other and dimensioned and located along with the heat transfer wall to form three sides to encompass a portion of a roll-up door.

A roll-up door assembly includes a first curtain, a second curtain, and a side frame. The first curtain and the second curtain can transition between a lowered position and a raised position. The first curtain and the second curtain at least partially define an internal volume in the lowered position. The side frame includes an elongated body defining a hollow interior, a pair of curtain tracks, a heating assembly, and an inlet assembly. The pair of curtain tracks can guide the first curtain and the second curtain between the lowered position and the raised position. The heating assembly can circulate heated air into the internal volume. The inlet assembly can provide fluid commination between the heating assembly and a lower temperature conditioned space such that the heating assembly can circulate air from the lower temperature conditioned space into the internal volume.

A system for heating a door guide area includes: a first and second conduit for channeling a flow of heated air; a heater fluidly connected to the first conduit and configured to provide air to the first and second conduits; first and second openings providing fluid communication between the first and second conduits to allow the air to circulate through the first and second conduits; a heat transfer wall part of the second conduit, to transfer heat from the flow of heated air in the second direction to a space outside of the second conduit that is defined, in part, by the heat transfer wall; and two side supports connected to the heat transfer wall, the side supports located opposing each other and dimensioned and located along with the heat transfer wall to form three sides to encompass a portion of a roll-up door.

The invention relates to an enclosure for refrigerating chambers, suitable for closing an access (3) to a refrigerating chamber and comprising: a sliding refrigerating door (1), and a quick-opening door (2), both assembled on the same side of the chamber, comprising a frame with vertical posts (4), comprising: on an outer face, at least one mouth (42) wherein a fan (6) is coupled which introduces air in the corresponding vertical post (4); on the inside thereof, a deflector plate (61) which directs the air towards electrical resistors (7) for heating the air, situated underneath the deflector plate and, on an inner face, an outlet (43) for supplying hot air on one of the surfaces, inner or outer, of the flexible sheet (21) exposed to the cold of the chamber and removing frost from said flexible sheet (21).

A system for heating a door guide area includes: a first and second conduit for channeling a flow of heated air; a heater fluidly connected to the first conduit and configured to provide air to the first and second conduits; first and second openings providing fluid communication between the first and second conduits to allow the air to circulate through the first and second conduits; a heat transfer wall part of the second conduit, to transfer heat from the flow of heated air in the second direction to a space outside of the second conduit that is defined, in part, by the heat transfer wall; and two side supports connected to the heat transfer wall, the side supports located opposing each other and dimensioned and located along with the heat transfer wall to form three sides to encompass a portion of a roll-up door.

A roll-up door assembly includes a first curtain, a second curtain, and a side frame. The first curtain and the second curtain can transition between a lowered position and a raised position. The first curtain and the second curtain at least partially define an internal volume in the lowered position. The side frame includes an elongated body defining a hollow interior, a pair of curtain tracks, a heating assembly, and an inlet assembly. The pair of curtain tracks can guide the first curtain and the second curtain between the lowered position and the raised position. The heating assembly can circulate heated air into the internal volume. The inlet assembly can provide fluid commination between the heating assembly and a lower temperature conditioned space such that the heating assembly can circulate air from the lower temperature conditioned space into the internal volume.