A heating, ventilation, and/or air conditioning (HVAC) system includes a discharge section housing forming a chamber, a first opening formed in the discharge section housing such that the chamber is configured to receive an air flow from a blower of the HVAC system via the first opening, and a second opening formed in the discharge section housing such that the second opening is positionally offset to the first opening. The chamber is configured to discharge the air flow through the second opening. The HVAC system also includes a guide extending across the chamber and sloping toward the second opening such that the guide is configured to direct the air flow from the first opening toward the second opening.

An airflow direction plate elongated in a direction perpendicular to a direction of an air flow from an indoor fan is disposed between the indoor fan and an air supply duct opening. The airflow direction plate has air vents arranged in a longitudinal direction, inclined plates each disposed to a corresponding one of the air vents and having different angles of inclination corresponding to positions of the air vents, and an acoustic material disposed on a surface facing the indoor fan. An indoor unit has a first air passageway allowing the air from the indoor fan to flow in the longitudinal direction of the airflow direction plate for a detour to the air supply duct opening and a second air passageway allowing the air from the indoor fan to flow into the air vents along the inclined plates.

A blower assembly for a heating, ventilation, and/or air conditioning (HVAC) system includes a centrifugal fan having a fan wheel. A plurality of blades are coupled to the fan wheel at an inner blade boundary and extend radially to an outer blade boundary. The blower assembly includes a first housing panel and a second housing panel disposed on opposite sides of the centrifugal fan and extending transverse to the centrifugal fan. The blower assembly includes a wall extending between the first housing panel and the second housing panel and a flange extending from the wall at a vertex. The flange extends outwardly from the wall. A first radial distance from the vertex to the outer blade boundary is between 4 percent and 20 percent of a second radial distance from a rotational axis of the centrifugal fan to the outer blade boundary.

A system provides warm, humidified pas to a patient via a patient interface. Horizontal connections can be used between the humidification chamber and conduit. To reduce the likelihood of condensate flowing back to the humidification chamber, or dead space or gases recirculation regions occurring within the gases flow path, a raised portion is positioned inside of the flow path to improve flow characteristics and to provide a barrier for condensate back flow. The raised portion also reduces the amount of condensate that is formed in the system and provides better flow characteristics for sensing purposes.

Breathing treatment device (100) for therapeutic use, the device comprises a motorized air recirculation system, a set of filters for air purification (10a, 10b, 10c, 10d), an ultraviolet ray sterilizer and an plasma electrostimulator, the device characterized in that it comprises means for the ejection of air in laminar flow (6) with noise emission between 0 and 5 dB; means for redirecting the laminar flow towards the head of the patient, a stabilizer (1), a multifilament diffuser (2), one or more UV-C LEDs (11).

Provided is an air cleaner, and more specifically, to an air cleaner in which a filter part using a photocatalyst is formed in a module type to facilitate replacement and cleaning and which includes an insert fan which is disposed inward from a suction port of a casing forming an exterior and including the suction port disposed at one side and a discharge port disposed at the other side, and suctions ambient air, a driving motor provided to be axially detachably coupled to the insert fan in a direction from the discharge port, and a suction unit fixing part in which an accommodation space, into which the insert fan and the driving motor are fixedly inserted in the direction from the suction port toward the discharge port and which is finished by inserting a cover member in the direction from the discharge port.

A downdraft element having a first flow opening and a second flow opening, wherein the first flow opening is arranged relative to the second flow opening at an angle 45°≤α≤135°, preferably substantially of 90°, so that at least the average flow direction of a fluid entering the first flow opening and exiting the second flow opening or vice versa is deflectable, characterized in that the downdraft element comprises at least one damper material receptacle on an inner side between the first flow opening and the second flow opening and at least one damper inserted into the damper material receptacle. The invention further relates to a corresponding assembly.

A pipe bend, in particular for an exhaust air duct of a fume extraction hood, which has a deflection of 60° to 120°, preferably 90°, with an inflow side and an outflow side, wherein the pipe bend has at least one air guide element which is curved in deflection direction and which extends in the interior of the pipe bend, characterized in that the pipe bend has a cross-sectional widening in flow direction behind the inflow side, in particular adjacent thereto, and a cross-sectional tapering in front of the outflow side, in particular adjacent thereto, the course of the bend of the outer wall of the bend deviating from the course of a quarter circle and having a bulge lying outside the vertex of the bend, in particular downstream of the vertex in the direction of flow.

A pipe bend for an exhaust air duct of a fume extraction hood, the pipe bend having at least one multi-part and curved air guide element which extends in the interior of the pipe bend, characterized in that a first and a second part element of the air guide element have a spacing (d) from one another in a radial direction of their curvature.

A blower assembly for a heating, ventilation, and/or air conditioning (HVAC) system includes a centrifugal fan having a fan wheel. A plurality of blades are coupled to the fan wheel at an inner blade boundary and extend radially to an outer blade boundary. The blower assembly includes a first housing panel and a second housing panel disposed on opposite sides of the centrifugal fan and extending transverse to the centrifugal fan. The blower assembly includes a wall extending between the first housing panel and the second housing panel and a flange extending from the wall at a vertex. The flange extends outwardly from the wall. A first radial distance from the vertex to the outer blade boundary is between 4 percent and 20 percent of a second radial distance from a rotational axis of the centrifugal fan to the outer blade boundary.