Abstract: A smoke alarm includes a housing having a generally hollow interior, a printed circuit board arranged within the interior of the housing, and an optical chamber assembly connected to the printed circuit board. The optical chamber assembly has an interior chamber and at least one smoke entry location. A substantial entirety of the interior chamber is external to the housing. At least one light device for evaluating particles is arranged within an interior chamber of the optical chamber assembly.

Abstract: An illustrative example embodiment of a transport refrigeration system includes an evaporator air management system having an evaporator heat exchanger and an air passage downstream of the evaporator heat exchanger. A two-stage fan assembly within the air passage includes a first fan stage having a first fan rotor, a first motor associated with the first fan rotor for selectively causing the first fan rotor to rotate in a first direction about a fan axis, a second fan stage having a second fan rotor in series with the first fan rotor, and a second motor associated with the second fan rotor for selectively causing the second fan to rotate in a second, opposite direction about the fan axis. The first and second fan stages draw air across the evaporator heat exchanger and through the air passage.

Abstract: An integrated diffuser grille for a coil unit includes a hub, a stack diffuser wall, a plurality of radial spokes extending between the hub and the stack diffuser wall, and a plurality of partial spokes extending inwardly from the stack diffuser wall. A radial length of the partial spokes is less than a radial length of the spokes. A plurality of circumferential elements is connected to the plurality of radial spokes between the hub and the stack diffuser wall. At least one circumferential element is connected to the plurality of partial spokes and at least one circumferential element has a non-uniform configuration about a circumference of the plurality of circumferential elements. A cross-section of the plurality of radial spokes has an airfoil-shape and at least one of a spoke pitch angle, camber angle, and chord of the airfoil-shape varies over a radial length of the plurality of spokes.

Abstract: A blower assembly includes a blower housing and a fan wheel mounted within the blower housing and being rotatable about an axis of rotation. The fan wheel includes a support disk positioned near a center of the fan wheel. A first wheel portion having a first plurality of impeller blades is positioned adjacent a first side of the support disk. A second wheel portion having a second plurality of impeller blades is positioned adjacent a second side of the support disk. The first wheel portion and the second wheel portion are asymmetrical about a plane oriented perpendicular to the axis of rotation and intersecting the support disk.

Abstract: An integrated fan heat exchanger stator assembly is provided including a hub and a casing. A plurality of elements is arranged between the hub and the casing. The plurality of elements is separated from one another by a plurality of external flow passages. At least one internal flow passage is configured to convey a first heat transfer fluid through one or more of the plurality of elements. The first heat transfer fluid is arranged in thermal communication with a second heat transfer fluid configured to flow through at least one of the external flow passages.

Abstract: An air handling unit for use with an air conditioning system is provided including a housing duct through which air is circulated. A vane-axial flow fan circulates air through the housing duct. The fan includes an impeller having a plurality of fan blades extending therefrom and an axis of rotation arranged substantially in-line with a flow path of the air. A heat exchanger assembly is arranged within the housing duct in a heat transfer relationship with the air circulating through the housing duct.

Abstract: An axial flow fan includes a hub rotatable about a fan axis and a plurality of fan blades mounted to the hub. One of the plurality of fan blades includes at least one wave extending in a span wise direction over the fan blade and at least one serration extending along a trailing edge of the fan blade. The at least one wave and the at least one serration are arranged at a location between 40% and 100% of a span of the fan blade.

Abstract: A blower assembly includes a blower housing and a fan wheel mounted within the blower housing and being rotatable about an axis of rotation. The fan wheel includes a support disk positioned near a center of the fan wheel. A first wheel portion having a first plurality of impeller blades is positioned adjacent a first side of the support disk. A second wheel portion having a second plurality of impeller blades is positioned adjacent a second side of the support disk. The first wheel portion and the second wheel portion are asymmetrical about a plane oriented perpendicular to the axis of rotation and intersecting the support disk.

Abstract: A fan assembly includes a fan housing having an inlet and an outlet. A recess formed in the inlet is configured to receive a portion of a heat exchanger. A fan rotor is positioned within the housing and is configured to rotate about a fan axis. The fan rotor includes a hub having a plurality of fan blades mounted thereto.

Abstract: A duct (100) comprises the molded combination of: an inlet flange (110) surrounding an inlet (102), the inlet having a height and a width; and body (112) extending from the inlet to an outlet (104) and having a body interior that laterally outwardly diverges and upwardly shifts from the inlet toward the outlet.

Abstract: A fan assembly (10) includes a shrouded fan rotor (24) including a plurality of fan blades (28) extending from a rotor hub (30) and rotatable about a central axis (26) of the fan assembly and a fan shroud (32) extending circumferentially around the fan rotor (24) and secured to the plurality of fan blades (28). The shroud (32) has a first axially extending annular portion (38) secured to the plurality of fan blades (28), a second axially extending annular portion (40) radially outwardly spaced from the first axially extending annular portion (38), and a third portion (44) connecting the first (38) and second (40) axially extending annular portions. A casing (22) is positioned circumferentially around the fan shroud (32) defining a radial clearance between the casing and the fan shroud. The casing (22) includes a plurality of casing elements (48) extending from a radially inboard surface (46) of the casing toward the shroud (32) and defining a radial element gap and an axial element gap.

Abstract: A duct (100) comprises the molded combination of: an inlet flange (110) surrounding an inlet (102), the inlet having a height and a width; and body (112) extending from the inlet to an outlet (104) and having a body interior that laterally outwardly diverges and upwardly shifts from the inlet toward the outlet.

Abstract: A refrigeration system having a refrigeration unit (22) for providing temperature conditioned air to a temperature controlled space, an engine (26) and an electric generation device (24) driven by the engine, is provided with a battery system (28) for supplying electric power. A method of operating the transport refrigeration includes, during a high cooling demand mode, operating the engine (26) to drive the electric generation device (24) for supplying electric power and simultaneously employing the battery system (28) for supplying electric power to jointly power the plurality of power demand loads (50, 42, 46, 48) of the refrigerant unit.

Abstract: An integrated fan heat exchanger stator assembly is provided including a hub and a casing. A plurality of elements is arranged between the hub and the casing. The plurality of elements is separated from one another by a plurality of external flow passages. At least one internal flow passage is configured to convey a first heat transfer fluid through one or more of the plurality of elements. The first heat transfer fluid is arranged in thermal communication with a second heat transfer fluid configured to flow through at least one of the external flow passages.

Abstract: A fan assembly includes a shrouded fan rotor having fan blades extending from a hub and rotatable about a central axis. A fan shroud extends circumferentially around the fan rotor and secured to the fan blades. The shroud includes a first axially extending annular portion secured to the fan blades, a second axially extending annular portion radially outwardly spaced from the first axially extending annular portion, and a third portion connecting the first and second axially extending annular portions. A casing is located circumferentially around the fan shroud defining a radial clearance between the casing and the fan shroud, and includes casing wedges extending from a radially inboard surface of the casing toward the shroud and defining a radial wedge gap between a first wedge surface and the shroud and an axial wedge gap between a second wedge surface and an upstream end of the fan shroud.

Abstract: A fan assembly includes a fan housing having an inlet and an outlet. A recess formed in the inlet is configured to receive a portion of a heat exchanger. A fan rotor is positioned within the housing and is configured to rotate about a fan axis. The fan rotor includes a hub having a plurality of fan blades mounted thereto.

Abstract: A duct (100) comprises the molded combination of: an inlet flange (110) surrounding an inlet (102), the inlet having a height and a width; and body (112) extending from the inlet to an outlet (104) and having a body interior that laterally outwardly diverges and upwardly shifts from the inlet toward the outlet.

Abstract: The distribution of condition air into the cargo space of a temperature controlled container is improved. Conditioned air may be selectively distributed into the cargo space from a plenum beneath the cargo support floor through a plurality of longitudinally and laterally spaced apart openings through the cargo support floor. Side air ducts may be provided extending rearwardly along the side walls of the container for distributing conditioned air received from a pair of side air outlets in a refrigerant unit associated with the container. The side air ducts may have a plurality of air discharge openings and may discharge conditioned air into vertically extending recesses in the side walls. The side air outlets have a selectively variable flow area. The number, location and size of the openings through the cargo support floor, as well as the air discharge openings in the side air ducts, may be selectively varied so as to selectively distribute the conditioned air flow throughout the cargo space.