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.