A vehicular air conditioning device includes an air conditioning case having first, second case introduction ports and first, second case discharge ports, and a fan. The first, second case discharge ports are offset upward and downward in an up-down direction relative to a rotation axis, respectively. A first inner guide surface of an inner guide plate is located on the one side of a second inner guide surface in the left-right direction. Air introduced through the first case introduction port is guided by the first inner guide surface to be drawn from a first passage into the fan, the air being blown upward to flow through the first case discharge port. Air introduced through the second case introduction port is guided by the second inner guide surface to be drawn from a second passage into the fan, the air being blown upward to flow through the second case discharge port.

A method for servicing a blower motor installed in a heating, ventilation, and air-conditioning (HVAC) assembly for a motor vehicle may include rotating a scroll housing subassembly of the HVAC assembly from an installed position to an extraction position. The method may include detaching a first securing element, the first securing element being distributed on the scroll housing subassembly and an evaporator housing subassembly of the HVAC assembly. The method may include removing the scroll housing subassembly from the HVAC assembly in a direction of extraction. The method may include that the scroll housing subassembly reaches the extraction position by axial rotation in a direction orthogonal to the direction of extraction. The method may include that the extraction position is a position at which the scroll housing subassembly is cleared for moving in the direction of extraction.

A casing, which receives a fan, has a suction port forming portion that forms a suction port. A separation tube has a tube upper end portion, which forms an air inlet, through which the air flows into an inside of the separation tube. The tube upper end portion is located on one side of the suction port forming portion in an axial direction such that the tube upper end portion overlaps with a portion of the suction port in the axial direction. A rib is formed at a periphery of the suction port. The periphery of the suction port has: an overlapping region, which overlaps with the tube upper end portion in the axial direction; and a non-overlapping region, which does not overlap with the tube upper end portion in the axial direction. The rib occupies more area in the non-overlapping region than in the overlapping region.

The present invention relates to a blower unit of an air conditioner for a vehicle, which can effectively prevent water from being introduced into a motor and has a motor housing and a blower wheel improved to smoothly perform cooling of the motor. The blower unit of a two-layered air conditioner for a vehicle, which can divide and inhale indoor air and outdoor air, includes: a scroll case having an upper passageway and a lower passageway; a first blower wheel disposed in the upper passageway; a second blower wheel disposed in the lower passageway and arranged below the first blower wheel; a blower motor for rotating the first blower wheel and the second blower wheel; and a motor housing for covering the blower motor, wherein a hub for guiding air is disposed on the second blower wheel, and the hub of the second blower wheel is partially overlapped with an end portion of the motor housing.

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(δ,z) of the half-spiral housing (1) compared to a logarithmic spiral radius (r.sub.log).

A centrifugal blower includes: a centrifugal fan having plural blades arranged around a fan axis and a separation plate to blow out air in a radial direction after being sucked from one side in an axial direction; a fan casing housing the centrifugal fan; a partition plate that defines a first air passage and a second air passage arranged on the other side of the first air passage in the axial direction; and a separation cylinder arranged inside the plural blades in the radial direction. The separation cylinder expands in the radial direction as extending toward the other side in the axial direction, and is shaped to extend outward in the radial direction obliquely to the axial direction at the other end position of the separation cylinder positioned at the other end in the axial direction.

A blower includes an air introduction box, a casing, an impeller, a filter medium, a frame body, a first partition plate and a second partition plate. The filter medium captures a foreign matter contained in a first air and a second air flowing from the air introduction box to the impeller. The frame body houses the filter medium and is installed in a filter installation portion upstream of the impeller. The first partition plate is fixed to the frame body and divides a space upstream of the filter medium into a plurality of regions. The second partition plate is fixed to the frame body and divides a space downstream of the filter medium into a plurality of regions. The filter medium is interposed between the first partition plate and the second partition plate.

A blower includes an introduction duct provided in an air introduction box. A filter is provided downstream of the introduction duct and upstream of an impeller. A separation cylinder is formed in a cylindrical shape and is provided in the impeller. An inner wall of an air inlet portion of the separation cylinder is provided not overlap with an inner wall of an air outlet portion of the introduction duct over the entire circumference.

A blower unit for a vehicle and an air conditioning device including the same, the blower unit including: a scroll casing having an inlet port; a fan rotatably disposed in the scroll casing; a motor having a shaft coupled to the fan; and a bell mouth disposed in the inlet port, in which an inner end of the scroll casing, which defines the inlet port, is disposed to be spaced apart from the fan in a radial direction to define a separation space, and the bell mouth prevents air, which flows by a rotation of the fan, from flowing reversely through the separation space. The blower unit and the air conditioning device including the same prevent air from flowing reversely to the outside of the scroll casing by means of the arrangement of the bell mouth and the scroll casing and the structural shape of the bell mouth.

A motor vehicle has a body with has a frontseat region and a backseat region, and has at least one installation part or fixture between the frontseat region and the backseat region. The at least one installation part or fixture is provided with a fan which is fluidically connected to at least one flow duct which opens towards the backseat region.