Abstract: An air conditioning unit includes a control that operates in an automatic air filtration mode of operation when commanded to do so. The control, when in this mode of operation, automatically activates an air filtration system within the unit in response to the sensing of contaminants in the air surrounding the unit. The automatic activation of the air filtration system occurs in response to an unfavorable comparison of a sensed value of air quality with an allowable limit for air quality. The allowable limit for air quality may be computed as a function of time so as to reduce the air quality required during times in which the space being heated or cooled is unoccupied.

Abstract: An air conditioning unit includes a control that operates in an automatic air filtration mode of operation when commanded to do so. The control, when in this mode of operation, automatically activates an air filtration system within the unit in response to the sensing of contaminants in the air surrounding the unit. The automatic activation of the air filtration system occurs in response to an unfavorable comparison of a sensed value of air quality with an allowable limit for air quality. The allowable limit for air quality may be computed as a function of time so as to reduce the air quality required during times in which the space being heated or cooled is unoccupied.

Abstract: A mount both supports a compressor, and provides fluid communication, between the compressor and a heat exchanger. A first axis is defined extending through the compressor center of mass. A second axis is defined extending parallel to the first axis and positioned a distance from the first axis. A manifold is provided by the mount, and has an inlet and an outlet. The inlet is positioned along the first axis and connected to the heat exchanger and the outlet is positioned along the second axis and connected to the compressor.

Abstract: A split air conditioner unit having a distributor located indoors for delivering refrigerant to a plurality of evaporator flow circuits. The distributor is connected to an outdoor condenser by a refrigerant line containing an expansion device. A strainer is located at the entrance to the distributor that homogenizes the expanded two phase mixture so that refrigerant of equal quality is delivered to each of the evaporator flow circuits.

Abstract: An air conditioning system having a fan that moves air over the outside heat exchanger of the system. The fan is of the bladed axial flow type. A winglet projects curvilinearly both radially outward from the trailing end of the tip of each blade of the fan and perpendicularly upward from the blade pressure surface. A conduit directs condensate formed on and dripping from the system inside heat exchanger to a collector located under the fan. The blade winglets scoop condensate from the collector and draw the water inward toward the center of rotation of the fan, where air moving through the fan slings the water on to the outside heat exchanger.

Abstract: A split scroll diffuses and directs air upwards from the circumference of a forwardly-curved centrifugal fan to a discharge plane to one side of the fan. The scroll has a first monotonically increasing curved wall that extends from a cutoff point near the circumference of the rotor, in the direction of rotation, to the discharge plane. A second monotonically increasing curved wall extends in the opposite direction from the cutoff point up to the discharge plane. The first and second curved walls are mirror images of one another taken at the plane corresponding to the air flow tangent that passes through the cutoff point. A curved cover above the fan at the exit plane blocks line of sight noise from radiating directly from the fan rotor into the work space or living space.