Abstract: The invention relates to a device (1) for generating an air wall across a passage opening (100), which passage opening (100) has lateral edges and a top edge, comprising: a first and second blowing device (10, 20), arranged at the lateral edges in such a way that planar air streams are blown over the height and respective parts of the width of the passage opening (100); wherein the device (1) is provided with regulating means (13; 23) for regulating the blowing speeds of the blowing devices; and wherein the first blowing device (10) and the second blowing device (20) are provided with secondary blower slits (12; 22) which are parallel to the respective primary blower slits (11; 21), which secondary blower slits (12; 22) are connected to secondary means for drying and/or heating air to be blown.

Abstract: The invention relates to a device (1) for generating an air wall across a passage opening (100), which passage opening (100) has lateral edges and a top edge, comprising: a first and second blowing device (10, 20), arranged at the lateral edges in such a way that planar air streams are blown over the height and respective parts of the width of the passage opening (100); wherein the device (1) is provided with regulating means (13; 23) for regulating the blowing speeds of the blowing devices; and wherein the first blowing device (10) and the second blowing device (20) are provided with secondary blower slits (12; 22) which are parallel to the respective primary blower slits (11; 21), which secondary blower slits (12; 22) are connected to secondary means for drying and/or heating air to be blown.

Abstract: A device for generating an air wall in an upright refrigerated cabinet (22) comprises a primary blower slit for generating a primary air stream (30) in the frontal opening (34) of the upright refrigerated cabinet which forms a thermal separation between the low inside temperature and the ambient air of a higher temperature. No mixing occurs between the primary air stream (30) and the secondary, optionally forced air streams (1, 9) added thereto. The thereby realized great effective heat resistance achieves that the supply of heat from the ambient air to the interior space of the refrigerated cabinet is considerably limited.