A ventilation device for filtering air and for separating water aerosols from air may include at least one filter element, at least one housing, at least one fan, and at least one flow adapter. The filter element may be secured in the housing such that air is flowable through the housing from an inlet opening of the housing to an outlet opening of the housing in a flow direction. The fan may be secured on the outlet opening downstream of the housing in the flow direction. The flow adapter may be secured on the inlet opening upstream of the housing in the flow direction. A coupling frame may be secured in an airtight manner between the housing and the flow adapter transversely to the flow direction. The filter element may have a circumferential sealing edge that seals the housing around the inlet opening to the coupling frame.

An system includes a fabric filter, an air supply system, a pulsing valve that is coupled to the air supply system and is configured to generate a statistical pulse of air that is directed to the fabric filter, an air flow monitor that is configured to monitor a flow of air associated with the statistical pulse of air, and a valve controller that is coupled to the air flow monitor that is configured to generate a performance signature for the pulsing valve based on the flow of air that was monitored.

An incubator for cell and tissue culture under controlled atmospheric conditions has a primary air flow control device that forms a primary, preferably laminar flow, air veil across an opening that allows access to the cells or tissue cultures disposed within the incubator. Preferably, most if not all of the air in the primary (laminar flow) air veil is recirculated, and a secondary air flow control device is used that forms a secondary, preferably laminar flow, air veil between the primary (laminar flow) air veil and a user of the incubator.

The present invention provides an air purifier that purifies, disinfect and decontaminate convention air flow by using UV rays. Because the UV rays emitted by the UV light sources are contained within the air purifier, use of the air purifier is safe in that a nearby person can avoid exposure to hazardous UV radiation. Adjustment of operating conditions, such as the UV intensity and wavelength and air speed, is programmable via a remote controller, a smart switch, a smart device, a wireless communication device, a smart home control appliance, a sensing device, and/or a built-in module, which renders the air purifier a smart appliance that may automatically and optimally suits to a user's need based on the user's habit and other physical parameters. Installation and removal of the air purifier, as well as cleaning and replacement of any part thereof, are simple and convenient, as a result of the clever design.

An incubator for cell and tissue culture under controlled atmospheric conditions has a primary air flow control device that forms a primary, preferably laminar flow, air veil across an opening that allows access to the cells or tissue cultures disposed within the incubator. Preferably, most if not all of the air in the primary (laminar flow) air veil is recirculated, and a secondary air flow control device is used that forms a secondary, preferably laminar flow, air veil between the primary (laminar flow) air veil and a user of the incubator.

A ventilation device for filtering air and for separating water aerosols from air may include at least one filter element, at least one housing, at least one fan, and at least one flow adapter. The filter element may be secured in the housing such that air is flowable through an inlet opening of the housing to an outlet opening of the housing in a flow direction. The fan may be secured on the outlet opening downstream of the housing in the flow direction. The flow adapter may be secured on the inlet opening upstream of the housing in the flow direction. A coupling frame may be secured in an airtight manner between the housing and the flow adapter. The coupling frame may include a discharge channel arrangement for draining water collected in the at least one filter element.

An example of an apparatus is provided. The apparatus includes a vacuum source to draw gas and a build material from a build process. The apparatus includes a filter to separate the build material from the gas. A filtered portion of the build material is to be deposited on the filter and a collected portion of the build material is to be redirected. The apparatus includes a storage container to receive the collected portion of the build material. The apparatus includes a mass estimation engine to determine a total mass of the build material. The mass estimation engine is to estimate a mass of the filtered portion.

A method for producing a three-dimensional shaped product that employs a shaping method based on dispersion of powder by a squeegee and irradiation onto a powder layer with a laser beam or electron beam, includes the following steps: 1. Setting an upper limit value and lower limit value for the amount of circulation passing through an anemometer, and an adjusting value within this range; 2. Measuring the amount of circulation and effecting control as follows: (1) When the measured value is between the upper limit value and lower limit value, the rotational speed of the blower fan is maintained, and (2) When the measured value has fallen below the lower limit value due to clogging of a filter, the rotational speed of the fan is increased and the rotational speed is selected at the stage where the measured value has reached the adjusting value, and the rotational speed is maintained.

There is provided an air cleaner including: an outlet pipe through which air is discharged; an airflow meter that is inserted toward an interior of the outlet pipe through a wall of the outlet pipe; and a flow-regulating member that is formed projecting from an inner surface of the outlet pipe at a leading end side of the airflow meter, the flow-regulating member including an edge that is formed with a peaked shape with respect to the inner surface and that runs along a direction of flow of air, a rear end that is formed at a downstream end of the edge in the direction of flow, and that is shaped cut sharply toward the inner surface and a width-narrowing portion that decreases in width in a circumferential direction of the outlet pipe on progression downstream in the direction of flow.

An air supply system in building elevators for the purpose of providing continuous purified and filtered exterior air for the improved safety of elevator cab passengers. The air supply system is separate from that of the building. System components include: an air intake means in the top of the building to receive exterior air; an air filtering and purifying mechanism; an air blower and compressor; air heating and cooling unit; a pressure controlled air plenum; a flexible vertical lightweight traveling tube that continuously carries purified air from the plenum near the top of the building to the cab interior, a flexible vertical lightweight air exhaust traveling tube that continuously carries spent air from the cab interior discharge conduit to the building exterior exhaust, wherein both tubes are affixed to the elevator traveling cable and extend the height of the building.