Abstract: Described herein is a mixed-flow fan assembly. The assembly comprises an impeller comprising a plurality of blades extending from a rotatable hub, and a shroud extending circumferentially around the impeller, wherein the shroud is secured to the plurality of blades, a casing with a bellmouth disposed circumferentially around the shroud, defining a cavity between the casing and the shroud, with flow control clearance gaps at a downstream end and an upstream end of the casing. The assembly further comprises one or more first circular ribs extending axially from the shroud within the cavity and substantially parallel to a rotational axis of the impeller, and a plurality of de-swirl vanes configured at predefined positions on an inner surface of the bellmouth.

Abstract: A transport refrigeration unit includes a fan and nozzle unit, a heat exchanger coil, and an axial fan having a vertically oriented fan axis. The axial fan is positioned within the fan and nozzle unit to draw air through the heat exchanger coil and discharge the air vertically upwards. A mounting bracket is used to mount the axial fan in the fan and nozzle unit. The mounting bracket includes a main support member having an opposing first surface and second surface and a through hole and at least one sidewall integrally formed with and extending from the second surface. The at least one sidewall has a smooth front surface and a curvature of the front surface facilitates flow towards a fan inlet.

Abstract: Disclosed herein is an air handling unit (AHU) for use with an air conditioning system. The AHU comprises a housing defining the shape of the AHU, through which air is moved; a heat exchanger is disposed inside the housing. The heat exchanger is configured to facilitate a transfer of heat to and from the air moving through the housing. The AHU further comprises a diagonal-flow fan disposed inside the housing, wherein an air inflow into the fan and/or an air flow path through the fan is substantially axial, aligned along an axis of rotation of the fan, and wherein the AHU has a height-to-width ratio in a range between 1.8 and 2.0.

Abstract: An air handling unit is disclosed, including a motor-driven fan with an annular outlet configured to move air through a housing of the AHU, a primary heat exchanger configured to cool or heat the air passing through the AHU, one or more heat elements placed downstream of the motor-driven fan, the one or more heat elements being configured to transfer heat to the airflow, and a heat shield placed between the motor-driven fan and the one or more heat elements, and configured to reduce heat transfer from the one or more heat elements upstream of the heat shield, and redistribute the airflow upstream and downstream of the heat shield, wherein the heat shield includes a distribution of openings configured to allow air to flow through the heat shield.

Abstract: An air diffuser comprises a thermal barrier and diffuser cover defining a shape of the diffuser, the diffuser comprises an inlet, an outlet, and a flow path extending in an upward direction from the inlet and turning substantially by a 90° angle into a substantially horizontal direction towards the outlet. An internal flow area of the flow path increases from the inlet towards the outlet. One or more turning vanes are configured at the outlet such that at least a curved portion of the turning vanes extends at least partially into the flow path. One or more turning vanes have a varying shape, transitioning from the curved portion at center to a flat profile portion at lateral ends of the corresponding tuning vanes; and one or more guide vanes configured at the outlet of the diffuser cover.

Abstract: Described herein is an air intake device for an engine of a vehicle equipped with a transport refrigeration unit (TRU). The device comprises a housing defining a shape of the device. The device is adapted to be fixedly or removably configured at a predetermined position in the vehicle, the TRU, a container or chassis associated with the vehicle, or a trailer associated with the vehicle such that the device facilitates inflow of ambient air therewithin and directs the ambient air towards the engine.

Abstract: An air handling unit is disclosed, including a housing duct through which air is moved from an inlet to an outlet; a heat exchanger configured to facilitate a transfer of heat to and from the air moving through the housing duct; and a fan disposed inside the housing duct, configured for moving air within the housing duct. The fan includes a diagonal flow impeller having an axis of rotation arranged in-line with a direction of flow of air through the duct, wherein an air flow path through the impeller has a mean angle that is oriented along a direction divergent from the axis of rotation of the impeller. The fan further includes a set of axial outlet guide vanes disposed downstream of the impeller, configured to redirect a flow of air exiting the impeller to be substantially parallel to the axis of rotation of the impeller.

Abstract: A cooling system for cooling an assembly including at least one heat-generating electronic device includes a heat spreader thermally coupled to the at least one heat-generating electronic device and a heat removal device having a surface that is thermally coupled to the at least one heat-generating electronic device via the heat spreader. The heat removal device includes an inlet area and at least one jet impingement feature fluidly coupled to the inlet area. The at least one jet impingement feature is positioned to direct a primary cooling fluid toward the surface that is thermally coupled to the at least one heat-generating electronic device.

Abstract: A cooling system for cooling at least one heat-generating electronic device includes a heat removal device having a surface that is thermally couplable to the at least one heat-generating electronic device. The heat removal device includes an inlet area and at least one jet impingement feature fluidly coupled to the inlet area. The at least one jet impingement feature is positioned to direct a primary cooling fluid toward the surface that is thermally coupled to the at least one heat-generating electronic device.

Abstract: A draw-through fan assembly and heat exchanger system configuration is disclosed, comprising a fan deck adapted to mount the fan assembly, an axial fan with a rotating shroud, a heat exchanger section located upstream of the fan and the fan assembly, and a J-shaped inlet bell mouth configured upstream of the fan deck that is located within a space between heat exchangers. Further, a motor associated with the fan assembly and one or more motor struts are positioned upstream of the fan. The fan is mounted on the bottom of the struts, such that once the fan-mounted assembly is configured at the outlet of the heat exchangers, the bell mouth and fan remain below the fan deck and are disposed in a space between the heat exchangers.

Abstract: A detection chamber assembly of a smoke detector is provided. The detection chamber assembly includes upper and lower covers, louvers and a corrugated bug screen. The louvers are arranged with the upper and lower covers to define a chamber bound between the upper and lower covers and the louvers. The louvers include a first pair of louvers defining a first space therebetween to permit fluidic ingress to the chamber and a second pair of louvers defining a second space therebetween to permit fluidic ingress to the chamber. The second space is wider than the first space. The corrugated bug screen includes a body disposed about the louvers and a mesh corrugation feature coupled to the body at the second space to permit fluidic ingress to the chamber at the second space and to inhibit bug ingress to the chamber at the second space.

Abstract: A transport refrigeration unit includes a fan and nozzle unit, a heat exchanger coil, and an axial fan having a vertically oriented fan axis. The axial fan is positioned within the fan and nozzle unit to draw air through the heat exchanger coil and discharge the air vertically upwards. A mounting bracket is used to mount the axial fan in the fan and nozzle unit. The mounting bracket includes a main support member having an opposing first surface and second surface and a through hole and at least one sidewall integrally formed with and extending from the second surface. The at least one sidewall has a smooth front surface and a curvature of the front surface facilitates flow towards a fan inlet.

Abstract: A refrigeration system includes a trailer refrigeration unit including a refrigerant circuit through which a refrigerant is circulated. The trailer refrigeration unit includes a condenser. A fuel cell is configured to generate electrical power for the trailer refrigeration unit. A coolant circuit includes a radiator configured to dissipate heat generated by the fuel cell. The condenser and the radiator are positioned such that each of the condenser and the radiator receives a flow of unconditioned ambient air.

Abstract: A detection chamber assembly of a smoke detector is provided. The detection chamber assembly includes upper and lower covers, louvers and a corrugated bug screen. The louvers are arranged with the upper and lower covers to define a chamber bound between the upper and lower covers and the louvers. The louvers include a first pair of louvers defining a first space therebetween to permit fluidic ingress to the chamber and a second pair of louvers defining a second space therebetween to permit fluidic ingress to the chamber. The second space is wider than the first space. The corrugated bug screen includes a body disposed about the louvers and a mesh corrugation feature coupled to the body at the second space to permit fluidic ingress to the chamber at the second space and to inhibit bug ingress to the chamber at the second space.

Abstract: A fan is provided for use with a casing having a bellmouth and a conduit portion. The fan has a hub, a number of blades extending from the hub, and a shroud. In cooperation with the casing and the conduit portion surrounding the shroud, the shroud has means for generating a separation bubble effective to limit a recirculation flow.

Abstract: A compact centrifugal fan that draws air in past the impeller hub, which encloses a motor and which spins about a central axis, and then urges the air through a bend in the fluid passageway. As the air passes through the annular inlet channel about the impeller hub, it flows in a forward axial direction. The air passes through the bend in the fluid passageway, as the air is being swept around the hub by the blades of the impeller. After the air passes through the bend, it has a reverse axial flow component, in addition to a circumferential flow component. Air having a forward axial flow component passes by the portion of an impeller blade that is closest to the impeller hub, and air having a reverse axial flow component passes the portion of a blade that is furthest from the impeller hub.