Abstract: A drying unit flow separator includes an inlet having a curvature, and an exhaust duct and recirculation duct connected to the inlet at a junction. A recirculation damper is provided adjacent to the junction and projects into the inlet to divide the air flow between the exhaust duct on the outside of the curvature and the recirculation duct. A method of recirculating air to a drying unit includes the steps of blowing air into a curved duct causing larger and heavier lint particles to gravitate to the outside wall of the duct, and conducting the air past a recirculation damper such that the flow is divided into a recirculation flow and an exhaust flow that includes the larger and heavier lint particles.

Abstract: A commercial laundry dryer with a perforated drum for the laundry mounted in a housing to rotate on a horizontal axis and the drum is of the full width and length of the housing to maximize the load size for the floor space occupied by the housing. The fuel-fired burner is mounted below the drum and faces upward with a deflector preventing the flame from contacting the drum. The fan for circulating the drying air is mounted above the drum as are dampers for selectively causing the drying air to be recirculated to the burner and drum or exhausted after a single pass and a lint collecting and discharging arrangement. The drying air is introduced into the bottom of the drum at the center, passes upwardly through the laundry load and out through the top of the drum near the axial ends.

Abstract: Disclosed herein is a geyseric burner assembly for selectively and efficiently burning either oil or a gaseous fuel therein and discharging the combustion flow in an axial direction. The burner assembly includes a plurality of concentric shells defining an outer housing, a plenum which communicates with a forced air supply and an air passageway which delivers air for combustion from the plenum along the interior shells where the air is preheated to a toroidally shaped mixing ring which is disposed on an inclined floor about a gas pilot nozzle. Oil or gaseous fuel is selectively introduced to the burner toward the mixing ring where it mixes in a rolling or turbulent geyseric motion with the inflowing air resulting in instantaneous ignition and combustion.