A heating, ventilation, and/or air conditioning (HVAC) unit includes a terminal unit. The terminal unit includes a housing having a first panel bordering a return airflow path, a second panel bordering an additional airflow path, and a separating wall disposed between and bordering the return airflow path and the additional airflow path. The terminal unit also includes a sound attenuator formed by the first panel and the separating wall.

An air-conditioning unit includes: an air-conditioning case in which an in-case passage is formed; and a blower having a blower fan arranged in the in-case passage to rotate around a fan axis so as to blow out air sucked from one side in an axial direction. A rectifying mechanism is arranged downstream of the blower fan in a flow of air in the in-case passage to define a rectifying passage to rectify a swirling flow generated by the rotation of the blower fan relative to the air blown from the blower fan. The rectifying mechanism includes a contracting rectifying passage having an inlet into which the swirling flow flows and an outlet through which the rectified air flows out. A flow path area of the outlet is smaller than a flow path area of the inlet.

Flow conditioner device (40), for use in a heat exchanger system (10). The flow conditioner device includes a honeycomb structure (42) and a mesh (44). The honeycomb structure is configured for rectifying an incoming gas flow (26), and is formed by walls that border channels extending in a flow direction (X) from inlet apertures at a leading surface, to respective outlet apertures at a trailing surface of the honeycomb structure. The mesh is formed by a plurality of wires that extend along further directions (Y, Z) transverse to the flow direction, and which are mutually spaced to define openings. The mesh is attached directly to the honeycomb structure and abuts the second surface, and cross-sectional areas of the openings defined along the further directions vary as a function of position along at least one of the further directions.

A venting grate includes a main portion, a first venting area, and a second venting area. The first venting area is defined by first, second, third, and fourth edges. Each of the first, second, third, and fourth edges extend from the main portion. The second venting area is defined by fifth, sixth, seventh, and eighth edges. Each of the fifth, sixth, seventh, and eighth edges extend from the main portion. The third edge and the fifth edge extend away from the main portion of the venting grate and angle together to form a pointed edge between the first and second venting areas.

A protective grille for a fan has a web structure which comprises radial webs spaced apart in a circumferential direction and coaxial circumferential webs spaced apart in a radial direction. The protective grille has at least a radial outer region and a central region around a central axis of the protective grille. An envelope surface spanned by the radial outer region and the central region is of convexly curved form in the radial outer region and is of flat form, parallel to a radial plane of the protective grille, in the central region.

An air vent structure includes a frame arranged at an air outlet or an air inlet of a box body, and a plurality of plates. In cross section, each of the plates is a bent structure and includes a first flat portion, an upslope portion and a downslope portion. The first flat portion is fixed to the frame and extends in a direction away from the frame, the plate then extending upward to form the upslope portion. A top of the upslope bends downward to form the downslope portion, and the height of the downslope portion is smaller than the height of the upslope portion. The air vent structure can ensure that hot air flow passes smoothly through the air outlet, and also ensure that the hot air flow is blown out in a horizontal direction. A box-type inverter having the air vent structure is also provided.

An incubator comprises an incubator chamber defined by a bottom part and a top casing covering a bed area of the bottom part. The incubator comprises an air treatment and circulation device for treating air and circulating it through the chamber, said air treatment and circulation device including a ventilator. The air treatment and circulation device is connected to chamber inlet openings which are arranged along one or more sides of said bed area, allowing treated air to flow from the treatment and circulation device into the chamber. The air treatment and circulation device furthermore is connected to at least one chamber outlet opening allowing air to flow out from the chamber to the treatment and circulation device. The air flows in the incubator are routed such that noise is reduced and no high air flow speeds occur near the infant in the incubator.

A movable air conditioner includes an air conditioner main body, an air conditioning unit installed in the air conditioner main body and configured to generate a cold air or a warm air, a control unit configured to control the air conditioning unit, and an attachment/detachment unit configured to detachably attach the air conditioning unit to the air conditioner main body so that the air conditioning unit can be optionally detached from the air conditioner main body and used independently.

An airflow baffle for controlling airflow through a heating, ventilation, and air conditioning (HVAC) system. The airflow baffle includes a main body, an upstream side of the main body, and a downstream side of the main body. A plurality of holes are defined by the main body, and extend through the main body between the upstream side and the downstream side. The plurality of holes include holes of various different diameters spaced apart at various different intervals to provide uniform airflow through the baffle.

The invention relates to a cylindrical air condenser having a heat exchanger which has a cylindrical or polygonal shape that develops in a vertical direction (Z) from a base or bottom to a top, and a suction device provided with a motorized fan housed in a frame arranged on the top of the heat exchanger. The cylindrical condenser includes a distributor element, housed inside the heat exchanger coaxially therewith. The distributor element has a plurality of conduits arranged coaxially one to the other, and have a progressively increasing height from the top to the bottom of the heat exchanger and a progressively decreasing transversal dimension. The configuration of the distributor element is such that, starting from the top towards the base of the heat exchanger, a plurality of through openings (A1-A6) whose areas are nominally identical are defined therein in the vertical direction (Z).