A system for controlling inside/outside air in air conditioner may include an air conditioner including an upward discharge passage, through which air is discharged toward a front glass of a vehicle, a downward discharge passage, through which air is discharged toward a floor of the vehicle, the upward discharge passage and the downward discharge passage being separated from each other, a first intake door, an opening amount of which is determined according to a ratio between inside air and outside air introduced into the upward discharge passage, and a second intake door, an opening amount of which is determined according to a ratio between inside air and outside air introduced into the downward discharge passage; and a control unit configured of controlling the opening amounts of the first and second intake doors according to a heating load of the air conditioner and a humidity of the interior of the vehicle.

The present invention relates to an air conditioning apparatus for a vehicle and, more specifically, to an air conditioning apparatus for a heat pump system, wherein while blown air passes through a first area and a second area which are partitioned from each other by a first separation wall, air passing through the first area is cooled or heated and then supplied to the inside of a vehicle, and air passing through the second area is discharged to the outside, so that the air conditioning apparatus can be miniaturized and can easily cool or heat the inside of the vehicle.

An air flow device for a vehicle including an instrument panel dashboard, and a blower, the air flow device comprising a first outlet on a front upper surface portion of the instrument panel dashboard from which an air is sent along the front upper surface to a first inlet on the instrument panel dashboard into which the air blown from the first outlet is drawn; and a second outlet on a back upper surface portion of instrument panel dashboard from which an air is sent along the back upper surface to a second inlet on the instrument panel. The blower outlets are installed so as to open parallel to the blower inlets along an upper surface portion of the instrument panel dashboard.

A roof assembly for a vehicle cabin, particularly for the cabin of an agricultural machine, comprising a housing of plastic material and an air conditioning unit housed within the housing, and at least one air inlet fluidically connected to the air conditioning unit and arranged at a periphery of the housing, and a filter arranged downstream of the air inlet. An air inlet shield is arranged at the air inlet, said air inlet shield being mounted to the periphery of the housing and sealingly mounted to the air inlet, the air inlet shield comprising a pair of shaped plates of plastic material, peripherally welded to each other, between which a chamber fluidically communicating with the filter and with the outside of the roof assembly is defined.

A vehicle air conditioner includes: a heating passage for sucking in air inside the vehicle cabin with a heating fan and supplying the air to a condenser, and supplying the air having passed through the condenser into the vehicle cabin from a heating air outlet; a cooling passage for sucking in the air inside the vehicle cabin with a cooling fan and supplying the air to an evaporator, and supplying the air having passed through the evaporator into the vehicle cabin from a cooling air outlet; a cooling inlet opening and a cooling outlet opening capable of communicating both sides of the condenser of the heating passage with outside of the vehicle cabin; and a heating inlet opening and a heating outlet opening capable of communicating both sides of the evaporator of the cooling passage with the outside of the vehicle cabin.

In a cross section of a flow passage formed to conduct a flow of air from an inside/outside air box to an upper air passage of a scroll casing while the cross section of the flow passage is taken along an imaginary plane which includes an outer edge of an air guide plate and is parallel to a rotational axis of an impeller, a passage section, which is located on one radial side of a separation tube where a nose of the scroll casing is placed, is defined as a first opening section, and another passage section, which is located on an opposite radial side of the separation tube, which is opposite to the nose, is defined as a second opening section. A passage cross-sectional area of the second opening section is larger than a passage cross-sectional area of the first opening section.

A blower unit of an air conditioner for a vehicle which allows one actuator to drive two doors in a structure in which at least two doors are provided in an intake duct is disclosed. The blower unit of an air conditioner for a vehicle includes an intake duct including an internal air inlet through which internal air is introduced and an external air inlet through which external air is introduced, a first door configured to adjust an opening amount of a part of the external air inlet and an opening amount of the internal air inlet, and a second door configured to adjust an opening amount of the remaining part of the external air inlet, wherein the first door and the second door are linked and driven together.

A system for controlling an airflow supplied to a cabin of a work vehicle may include a housing defining a mixing chamber and a recirculating chamber isolated from the mixing chamber. The mixing chamber is configured to receive fresh air via a fresh air inlet and recirculated air via a first recirculated air inlet, with the fresh air being mixed with the recirculated air within the mixing chamber to create a fresh/recirculated air mixture that is supplied through a mixed air outlet. The recirculating chamber is configured to receive recirculated air via a second recirculated air inlet and supply the recirculated air through a recirculated air outlet. Additionally, the system may include a gate movable relative to the first recirculated air inlet to adjust an amount of recirculated air supplied to the mixing chamber, and an actuator configured to actuate the gate relative to the first recirculated air inlet.

A centrifugal blower includes a box, a filter, an impeller, a scroll casing, a bell mouth, a partition wall, and a separation tube. The scroll casing defines an air passage gradually increasing from a nose portion in a circumferential direction. The partition wall divides the air passage into an upper passage and a lower passage. The separation tube includes an air introducing plate to partially cover the impeller and defining an air inlet portion and a tubular portion that extends from the air inlet portion through the impeller. On a virtual plane parallel to a rotational axis of the impeller, an outer edge of the air introducing plate extends and a passage between the filter and the upper passage is divided by the separation tube into a first passage cross-section closer to the nose portion and a second passage cross-section that is smaller than the first passage cross-section.

A centrifugal fan includes first blades and second blades connected via a separation plate. A side plate supports the first blades located on one side in an axial direction, and a main plate supports the second blades on the other side in the axial direction. The separation plate has an inner diameter larger than or equal to an outer diameter of the main plate and larger than or equal to a largest inner diameter of the second blade. The separation plate has an outer diameter smaller than or equal to an inner diameter of the side plate and smaller than or equal to a smallest outer diameter of the first blade.