An air outlet nozzle, in particular for a motor vehicle, includes: a tube-shaped nozzle body; a first air guide element which is arranged in the tube-shaped nozzle body, and which is in contact with the tube-shaped nozzle body and forms a screw shape; a second air guide element which is arranged in the tube-shaped nozzle body, and which is in contact with the tube-shaped nozzle body and forms a screw shape. The first air guide element and the second air guide element are offset from one another in the tube-shape nozzle body, such that a first airway and a second airway are formed in the tube-shaped nozzle body. A moving adjustment element closes the first airway in a first position, and releases the first airway in a second position.

A fluid discharge device includes a base portion defining a fluid flow passage and having an opening at a downstream end of the fluid flow passage, and a grill portion disposed to adjust a flow direction of the fluid blown from the opening. The grill portion includes a flow passage forming body defining a main flow passage and an auxiliary flow passage. In the flow passage forming body, the auxiliary flow passage surrounds the main flow passage and the auxiliary flow discharged from the auxiliary flow passage flows outside of the main flow discharged from the main flow passage. The flow passage forming body is configured such that a direction of the auxiliary flow discharged from the auxiliary flow passage corresponds to the direction of the main flow discharged from the main flow passage, when the flow direction of the fluid blown out of the opening is adjusted.

An air discharge device includes an air discharge unit for discharging an air flow. The air discharge unit includes at least one main hole from which an air flow is blown out as a working air flow, and a separation structure configured to separate a central portion of a thickness of a velocity boundary layer of the working air flow from a center line of the main hole at a downstream side of the main hole.

A temperature control system in an aircraft passenger service unit is disclosed. In embodiments, the system includes a swirl chamber configured to receive an inlet air stream, and a vortex tube configured to receive the inlet air stream from the swirl chamber and separate the inlet air stream into a warmer air stream and a cooler air stream. In embodiments, the system further includes a nozzle configured to direct a temperature-controlled air stream into a passenger space of an aircraft; wherein the nozzle is configured to be selectably adjusted in order to selectively blend the warmer air stream and the cooler air stream in order to generate the temperature-controlled air stream.

An air discharge device is configured to discharge an air flow. The air discharge device includes a main hole for discharging an air flow as a working air flow, an auxiliary hole provided around the main hole to discharge a support air flow, and a vortex suppression structure configured to suppress development of vortices generated in a velocity boundary layer of the working air flow at a downstream side of an outlet of the main hole. This vortex suppression structure is configured to make a central portion of the thickness of the velocity boundary layer of the working air flow at the downstream side of the outlet of the main hole to be closer to a mainstream of the support air flow, at the downstream side of the outlet of the main hole.

An air discharge device includes a duct that defines a flow passage through which a working air flow to be discharged passes, and a hole forming member defining an air discharge hole as an outlet of the working air flow. The hole forming member has a vortex generation structure configured to generate an auxiliary vortex having a vortex characteristic including a vortex rotation direction and a vortex axis direction. The vortex characteristic of the auxiliary vortex is different from that of a lateral vortex generated by the working air flow at a downstream side of the air discharge hole. The vortex generation structure is configured in the hole forming member so that the auxiliary vortex collides with the lateral vortex in a state where at least one of the vortex rotation direction and the vortex axial direction of the vortex characteristic is different from that of the lateral vortex.

A vehicle interior panel includes a diffuser spanning an air discharge opening. The diffuser has a spiral slot formed therethrough such that changing an axial distance between opposite ends of the slot changes an air flow capacity of the diffuser. The diffuser has an elegant and simplified design and can be made as one piece from a sheet material. Air is discharged from the diffuser radially and substantially equally in all radial directions. The diffuser can also function to provide ambient light from a light source and/or to deliver an air freshening agent to the passenger cabin.

The air discharge device includes a duct defining: a main flow path through which an air flow passes; and a main hole opened in a flat shape to discharge the air flow as a working air flow toward a downstream from the main flow path. A throttle portion is provided in the duct to reduce a flow path height of the main flow path from an upstream of the air flow toward a downstream of the air flow. A plurality of partitions are arranged to divide the main flow path in a major direction into a pair of side flow paths and at least one center flow path. The plurality of partitions are disposed in the duct such that a flow path width of the center flow path is reduced from the upstream of the air flow toward the downstream of the air flow.

An air discharge device includes an air discharge unit for discharging an air flow. The air discharge unit includes at least one main hole from which an air flow is blown out as a working air flow, and a separation structure configured to separate a central portion of a thickness of a velocity boundary layer of the working air flow from a center line of the main hole at a downstream side of the main hole.

A defroster nozzle of a vehicle installed below a windshield of the vehicle and discharging conditioned air toward the windshield, the defroster nozzle generating vortex during discharging is disclosed. The defroster nozzle may include a housing formed in a cylindrical shape and having an inlet formed at one end of the housing through which the conditioned air is introduced, and an outlet formed adjacent to the windshield through which the air is discharged, and a vortex generator configured to protrude from an inner side surface of the housing to discharge the air introduced into the housing as vortex in the inner side surface of the housing.