Abstract: Air-conditioning systems for vehicles include at least one air-distribution duct and at least one air-return duct. The at least one air-distribution duct is in air flow communication with at least one air-conditioning unit and is adapted to extend along a substantial portion of the interior of the vehicle. The at least one air-distribution duct includes at least one opening through which air conditioned by the at least one air-conditioning unit can be discharged to the interior of the vehicle. The at least one air-return duct also has at least one opening though which air from the interior of the vehicle can pass and be discharged from the air-return duct at a discharge location. The at least one air-return duct is adapted to extend to one or more areas of the vehicle interior so that at least one opening in the air-return duct is substantially removed from the discharge location.

Abstract: Air-conditioning systems for vehicles include at least one air-distribution duct and at least one air-return duct. The at least one air-distribution duct is in air flow communication with at least one air-conditioning unit and is adapted to extend along a substantial portion of the interior of the vehicle. The at least one air-distribution duct includes at least one opening through which air conditioned by the at least one air-conditioning unit can be discharged to the interior of the vehicle. The at least one air-return duct also has at least one opening though which air from the interior of the vehicle can pass and be discharged from the air-return duct at a discharge location. The at least one air-return duct is adapted to extend to one or more areas of the vehicle interior so that at least one opening in the air-return duct is substantially removed from the discharge location.

Abstract: A ventilation system for an absorption refrigerator having a condenser and an absorber and located in a slide-out room of a recreational vehicle. The ventilation system includes a generally vertical air passage in which the condenser and the absorber are located, a lower vent for the intake of ambient air into the air passage, an upper vent for exhausting heated air from the air passage, and an air assist system for forcing air flow through the air passage only when the temperature of the ambient air is too high for an efficient natural draft. Both the lower and upper vents are in the side wall of the slide-out room.

Abstract: A recreational vehicle includes an exterior wall, a floor, a roof, and a refrigerator having a front door, side walls, a rear wall, an absorber located at the rear wall, and a condenser located at the rear wall. The rear wall of the refrigerator is substantially perpendicular to the exterior wall. The recreational vehicle further includes an air passage in which the absorber and the condenser are located. An enclosure extends between one of the side walls and the exterior wall to partially form a side portion of the air passage located between the exterior wall and one of the side walls of the refrigerator. A side intake vent extends through the exterior wall below the enclosure and communicates the side portion of the air passage with air surrounding the recreational vehicle. At least one half of the side intake vent is located forward of the rear wall toward the front door of the refrigerator.

Abstract: A ventilation system for an absorption refrigerator having a condenser and an absorber and located in a slide-out room of a recreational vehicle. The ventilation system includes a generally vertical air passage in which the condenser and the absorber are located, a lower vent for the intake of ambient air into the air passage, an upper vent for exhausting heated air from the air passage, and an air assist system for forcing air flow through the air passage only when the temperature of the ambient air is too high for an efficient natural draft. Both the lower and upper vents are in the side wall of the slide-out room.

Abstract: A ventilation system for an absorption refrigerator having a condenser and an absorber and located in a recreational vehicle. The ventilation system includes a generally vertical air passage in which the condenser and the absorber are located, a lower vent for the intake of ambient air into the air passage, an upper vent for exhausting heated air from the air passage, and an air assist system for forcing air flow through the air passage only when the temperature of the ambient air is too high for an efficient natural draft. The air assist system includes a blower positioned to promote airflow within the air passage over the condenser and the absorber, a temperature activated thermal switch positioned to sense ambient temperature and adapted to energize the blower only when the ambient temperature is above a predetermined value, and a power switch connected in series to the thermal switch to activate and deactivate the system.

Abstract: An ice maker water supply line is provided with a heater. The heater is controlled by a thermally operated switch. The temperature sensor of the switch senses ambient temperature and operates the heater to prevent freezing of the water supply line. The ice maker is provided in an absorption refrigerator in a recreational vehicle. The supply line runs up the back of the refrigerator in a passage for cooling air flow.

Abstract: An air conditioning apparatus is provided with an exhaust feature for exhausting air from the living enclosure. The air conditioning apparatus includes an evaporator blower for moving air from the living enclosure through an evaporator coil and back to the living enclosure. The evaporator blower includes a blower housing which includes an air inlet and an air outlet, and an exhaust opening is provided in the blower housing. An exhaust door is pivotally mounted on the blower housing and is movable between a first position in which the exhaust door closes the exhaust opening in the blower housing and a second position in which the exhaust door closes the air outlet of the blower housing and the exhaust opening is opened. When the door is in the second position, air is exhausted from the living enclosure through the exhaust opening.