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    • 1. 发明申请
    • LABORATORY FUME HOOD HAVING GUIDED WALL JETS
    • US20190351466A1
    • 2019-11-21
    • US16474247
    • 2017-12-28
    • Waldner Laboreinrichtungen GmbH & Co., KG
    • Bernhard BobuschOliver KrügerJürgen LiebschChristian Oliver PaschereitJens Hermann Wintering
    • B08B15/02B01L1/02
    • The present invention relates to a fume cupboard 1 available for a laboratory space, which has a housing 60, in which a work space is located, which is limited on its front side by a front sash 30, on its base by a base plate 34 and by a side wall 36 on each of its sides. Furthermore, the fume cupboard comprises a first hollow profile 10, 10′ arranged on a front side of each side wall 36, wherein each hollow profile 10, 10′ has a first pressure chamber 10b, 10b′, which is fluidically connected to a plurality of first openings 10d, 10d′, out of which air jet streams in the form of wall jet streams 100 consisting of pressurised air can be emitted along the respective side wall 36 into the work space. The fume cupboard is characterized in that at least one of the first openings 10d, 10d′ is fluidically connected to the first pressure chamber 10b, 10b′ via a first longitudinal duct 10c, 10c′, and that the first duct 10c, 10c′ has a length L in the direction of flow that is at least three times the hydraulic diameter of a cross-sectional surface of the first opening 10d, 10d′, from the perspective perpendicular to the direction of flow in order to prevent flow displacement of the wall jet stream 100 coming out of the first opening 10d, 10d′ of the side wall 36 in an area of the front side of the work space up to at least 25% of the depth of the work space. Furthermore, the present invention relates to a fume cupboard, where such a hollow profile 20, 20′ is arranged on a front side of the base plate 34.
    • 2. 发明申请
    • LABORATORY FUME HOOD HAVING WALL JETS
    • US20190351465A1
    • 2019-11-21
    • US16474156
    • 2017-12-28
    • Waldner Laboreinrichtungen GmbH & Co., KG
    • Jürgen LiebschChristian Oliver Paschereit
    • B08B15/02F24F3/16
    • The present invention relates to a fume cupboard 1 for a laboratory, which fume cupboard has a housing 60 in which a work area is located, delimited in the front by a front sash 30, at the bottom by a bottom plate 34 and on each side by a side wall 36. The fume cupboard 1 further comprises a first hollow profile 10, 10′ disposed on a frontal end face of each side wall 36, wherein each first hollow profile 10, 10′ contains a first pressure chamber 10b, 10b′ which is in fluid communication with a multiplicity of first openings 10d, 10d′, from which air jets in the form of wall jets 100 consisting of compressed air may be output into the work area along the respective side wall 36. The fume cupboard is characterized in that the size of the first openings 10d, 10d′ and the air pressure that prevails in the first pressure chamber 10b, 10b′ during proper user of the fume cupboard are selected such that the first pressure chamber 10b, 10b′ can be connected fluidically to a compressed air system 74 installed in the building without causing airflow delamination of the wall jets 100 from the side wall 36 in a region extending from a front side of the work area at least as far as 25% of the depth of the work area.The present invention further relates to a fume cupboard in which a hollow profile 20, 20′ of such kind is disposed on a front frontal end face of the bottom plate 34.