A HVAC apparatus 10 for a vehicle 12 having a fan unit 14 with a plurality of axial impellers 16 driven by motors 18 mounted in their centers, wherein the axial impellers rotational axis is substantially perpendicular to the fan unit's suction direction, a heat exchanger unit 20 forming an air duct receiving air from the fan unit, and a plate-shaped housing accommodating the fan unit and the heat exchanger unit.

A vehicle body structure includes spaced roof rails and a structural air duct. The air duct has at least two bows connecting between the roof rails and defining first and second channels. An interconnecting member is connected between the bows and defines a third channel connecting the first and second channels in fluid communication with each other. At least one of the bows defines an outlet port configured to supply air to a cabin.

A boss fitted to a rotation shaft of a motor is placed on a bearing surface. An airflow producing unit includes blades protruding from the boss in a radial direction of the shaft and rotating with the boss. The boss includes a first end surface to contact the bearing surface when fitted to the shaft with a first end of the boss in a thickness direction facing the bearing surface, and a second end surface to contact the bearing surface when fitted to the shaft with a second end of the boss in the thickness direction facing the bearing surface. A degree of symmetry defined by A/B falls within a range of 1.0 to 1.3, where A is a height of the airflow producing unit from the first end surface, B is a height of the airflow producing unit from the second end surface, and A B.

Recreational vehicles are provided with a tapered duct connector and/or a conditioned air receiving sleeve that is positioned in an infra-ceiling space of the vehicle. The tapered duct connector comprises a connector inlet coupled to a conditioned air passage on a wall of the conditioned air receiving sleeve, and a connector outlet coupled to the supply duct, to fluidly couple the sleeve to the supply duct. The tapered duct connector comprises a transitional duct height that increases from the connector outlet to the connector inlet. The conditioned air passage of the conditioned air receiving sleeve, the tapered duct connector, and the supply duct is contained such that air can pass from the conditioned air opening of the conditioned air receiving sleeve, through the conditioned air receiving sleeve, and into the supply duct without contacting structural components in the infra-ceiling space of the recreational vehicle.

An air cleaner may include an electrostatic air cleaner including: an air cleaner casing; an air cleaner main body; and an air cleaner return grille cover which is coupled to the air cleaner casing, wherein the air cleaner main body may include: a filter unit which has a size greater than a predetermined particle size; a dust collector unit which secondarily filters out dust, which passes through the filter unit and has a size equal to or smaller than the predetermined particle size, by collecting the dust on an electrode plate by generating a high-tension arc; a converter unit which generates the high-tension arc on the dust collector unit; and a sensor unit which measures concentration of the dust having a size equal to or smaller than the predetermined particle size to operate the dust collector unit and the converter unit.

A roof top air conditioner unit for a vehicle, in particular a recreational vehicle, wherein the roof top air conditioner at least in part is made of expanded polypropylene (EPP). At least one stabilizing and/or connecting element of the roof top air conditioner unit is mold in the section of the roof top air conditioner unit made of EPP. Furthermore, the present invention refers to a method for producing, assembling and installing such roof top air conditioner units and a vehicle having such a roof top air conditioner assembly.

A radial fan half-spiral housing has a pressure chamber extending in the circumferential direction about an axial intake opening (5) to a radial blow-out opening (31). The pressure chamber, as viewed in the circumferential direction, is subdivided into at least one beginning portion (7), one central portion (8), and one blow-out portion. The intake opening (5) determines a central axis of rotation for a fan wheel. An averaged half-spiral housing radius, as viewed about the axis of rotation (11), varies in the beginning portion (7), the center portion (8), and the blow-out portion (9). It reaches a maximum in the blow-out portion (9). The center portion (8) of the half-spiral housing radius is reduced in a region determining a maximum height H(,z) of the half-spiral housing (1) compared to a logarithmic spiral radius (r.sub.log).

A humidifying device has an adsorption module and a blower. The adsorption module has the adsorbent. The adsorption module is configured to adsorb the water from the air passing through the adsorption module to the adsorbent and is configured to desorb the water from the adsorbent to air passing through the adsorption module. The blower blows the air to the adsorption module. The blower, in an adsorption operation in which the adsorbent adsorbs the water from air, draws the air from a roof space and blows the air to the adsorption module whereby the adsorption module adsorbs the water from the air. The roof space is defined between a vehicle ceiling panel and a ceiling interior member.

A condenser unit for a roof-mounted air conditioning system may include a condenser having a plurality of condensation tubes. The longitudinal ends of the plurality of condensation tubes may be connected to a first and second collection tube of the condenser. A carrier may secure the condenser unit to a vehicle roof having a first support region assigned to the first collection tube to support the first collection tube and a second support region assigned to the second collection tube to support the second collection tube. A fan frame may define a flow duct leading from the condenser to a condenser blower. The fan frame may be secured to the carrier having a first retaining region assigned to the first collection tube and a second retaining region assigned to the second collection tube. The condenser may be held on the carrier via the fan frame.

An evaporator unit for a rooftop air-conditioning system of a vehicle may include a housing having two evaporators. Each evaporator may include a plurality of evaporation pipes running parallel to one another and parallel to a Z axis of the evaporators, a distributor and collector box running parallel to an X axis of the evaporator, and a diverting box running parallel to the X axis of the evaporator. The distributor and collector box may include an inlet connector for liquid refrigerant and an outlet connector for gaseous refrigerant that may be disposed adjacent to one another on a same face side of the distributor and collector box and in a Y axis of the evaporator. The two evaporators may be disposed on both sides of an intake chamber of the evaporator unit and may lay opposite one another in a transverse axis of the evaporator unit. The evaporators may be structurally identical.