There is provided a safety cabinet in which a good operability is attained and it is possible to secure a sterility assurance level. There is provided a safety cabinet including an operation chamber, a front door that covers part of an opening of a front surface of the operation chamber, an operation opening below the front door, into which an operator can insert an hand and perform an operation, and a front slit, which takes in air inside the operation chamber and air in a room through the operation opening, on a front surface side of a lower portion of the operation chamber, the cabinet including sterilization gas generating means; and sealing means for sealing the operation opening during a sterilization operation.

The invention relates to a flow cabinet system for cleaning at least one object, the system comprising: a cabinet having walls enclosing a volume; tubing for the supply of compressed gas as well as a plurality of handheld cleaning tools within the volume for removing, by means of the supplied compressed gas, powder from the at least one object; and an extraction unit comprising tubing for extracting powder-laden gas from the volume through a gas outlet located near one of the left and right side walls and the back wall.
The cabinet further comprises a gas inlet in the back wall near the other of the left and right side walls and the back wall so as to define an overall flow that is substantially horizontal and transverse to the operator.

Device for extracting toxic powders or vapours, used with a weighing device on which is placed a container containing products that give off toxic powders or vapours, including a blow nozzle (14) for blowing air to carry toxic vapours to an open top surface of the container and actuated when it is placed facing the container's top surface, and a suction nozzle (16) for sucking up air laden with toxic powders or vapours which has been blown by the blow nozzle, and actuated when it lies facing the open surface of the container, the two nozzles being lowered by a motor (30) to position them facing the container's upper surface. The device includes a safety means for preventing the nozzles from being lowered if there is an unforeseen obstacle underneath one of the nozzles.

The invention relates to a device for additively producing at least one component region of a component, in particular a component of a turbomachine. The device can comprise at least one coating apparatus for applying at least one powder layer of a component material to at least one build-up and joining zone of at least one component platform, which can be lowered, wherein the coating apparatus can be moved in relation to the component platform. In addition, the device comprises at least one suction device for suctioning of process waste gases and/or particles. The coating apparatus thereby comprises at least one suction channel or at least one suction pipe, which has at least one suction opening oriented in the direction of the component platform.

The biosafety cabinet has a frame, which defines an enclosed work area and a front access opening, and a work surface along the bottom of the work area. One or more intake openings are positioned along the front access opening adjacent the work surface, a recirculation duct is in fluid flow communication with the intake holes, a supply filter is in fluid flow communication with the recirculation duct, and a supply blower is positioned upstream from the supply filter in fluid flow communication with the recirculation duct. One or more exhaust openings extend along the work surface, wherein at least one exhaust opening is positioned adjacent the front access opening rearward of the intake holes. The exhaust openings are in fluid flow communication with an exhaust duct, an exhaust filter, and an integral exhaust blower.

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.

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.

An object is to provide a suction method and a suction device which depressurize the pressure of the surface of a target installed in an open system to a critical pressure or less and which thereby can suck it and a laser processing device and a laser processing method using these. In a state where a predetermined operating distance is apart from a target installed in an open system and a suction port, the pressure of an inside of a pressure reduction chamber communicating with the suction port is set equal to or less than a critical pressure at which the speed of a gas sucked from the suction port is brought into a critical state; the jet speed of the gas in a jetting port from which the gas is jetted toward the target is set more than a Mach number of 0.2, the Mach number being obtained by dividing a jet speed of the gas by the sound speed of the gas jetted from the jetting port, the gas is jetted from the jetting port and is sucked by the suction port; a swirl flow is formed so as to surround the suction port between the surface of the target and the suction port; and thus the pressure of a central region of the swirl flow from the suction port to the surface of the target is reduced to the critical pressure or less and suction is performed.

The present invention provides a steady flow structure and a ventilation apparatus having the steady flow structure. The ventilation apparatus comprises: a hood arranged indoors, an inner chamber of the hood constituting a work chamber; and a front wall of the hood formed with a front opening which opens towards the indoor environment; an air supply duct, which supplies air into the work chamber through air supply outlets provided on the hood and extending in the left and right width direction of the work chamber; and an air exhaust duct, through which the air entering the work chamber through the front opening and the air entering the work chamber through the air supply outlets are exhausted from the work chamber to outside; a steady flow structure is provided in the interior of the air supply duct, supply airflow enters into the steady flow structure in the left-right directions, and then blows out evenly and stably along the air supply outlets located along the sides of the steady flow structure after flowing through the steady flow structure.

The extraction room and ventilation system comprises an extraction room involving opposing supply and exhaust systems that provide a laminar type air flow configured to transmit fresh air flow to said extraction room at a rate of more than 1000 cubic feet per minute at a static pressure of more than 0.5 inch water. The extraction room is configured to use intrinsically safe or Class 1 Division 1, group D electrical appliances; a flammable gas detector, with an alarm and automatic ventilation system connected to said flammable gas detector; and be constructed in accordance with the International Fire Code & International Building Code definition for a One Hour Fire Rated Room construction. In another embodiment the ventilation system may be prefabricated or installed in a standardized movable unit such as a trailer or shipping container.