A ventilator includes a ventilation body, the ventilation body includes a ventilation cavity and an air inlet end and an air outlet end communicating with the ventilation cavity, the ventilation body further includes an annular shell configured to form the ventilation cavity, the annular shell is formed with an annular cavity inside, an air inlet and an air outlet communicating with the annular cavity are disposed on the annular shell, the air outlet is communicated with the annular cavity and the ventilation cavity, the air outlet has a slit shape extending along a circumferential direction of the annular shell and is disposed to be capable to guide gas flows out towards the air outlet end. The ventilator may greatly increase the ventilation volume and the gas pressure, by using the ventilation body as mentioned above.

Device for producing a vacuum using the Venturi effect are disclosed that have a housing defining a suction chamber, defining a motive passageway includes a tapering portion most proximate the suction chamber that convergingly tapers from a motive entrance to a motive exit into the suction chamber, the motive exit being in fluid communication with the suction chamber, and defining a discharge passageway having a discharge entrance in fluid communication with the suction chamber and divergingly tapering as it extends away from the suction chamber, and having a solid fletch centered within the tapering portion. The device can include a fletch-partition disposed in the motive passageway and dividing the motive passageway into two flow paths along opposing sides of the partition. The solid fletch divergingly tapers toward the suction chamber as it extends from the partition, thereby providing a circumferentially continuous flow of fluid around the fletch.

Device for producing a vacuum using the Venturi effect are disclosed that have a housing defining a suction chamber, defining a motive passageway includes a tapering portion most proximate the suction chamber that convergingly tapers from a motive entrance to a motive exit into the suction chamber, the motive exit being in fluid communication with the suction chamber, and defining a discharge passageway having a discharge entrance in fluid communication with the suction chamber and divergingly tapering as it extends away from the suction chamber, and having a solid fletch centered within the tapering portion. The device can include a fletch-partition disposed in the motive passageway and dividing the motive passageway into two flow paths along opposing sides of the partition. The solid fletch divergingly tapers toward the suction chamber as it extends from the partition, thereby providing a circumferentially continuous flow of fluid around the fletch.

An insert for an air intake of a suction duct, the insert including an inner portion configured to extend within the suction duct, a mating portion configured for sealingly engaging the air intake, and an outer portion configured for extending outside of the suction duct. The inner portion includes a conduit having a central axis extending along an inlet direction at the inlet end and along an outlet direction at the outlet end, the inlet and outlet directions being non-parallel. The outlet end has a smaller cross-sectional area than that of the suction duct. The insert includes an inlet in fluid communication with the inlet end of the conduit. The outer portion includes a curved lip surrounding at least part of an inlet opening of the inlet, the lip configured to direct a flow into the inlet opening and toward the inlet end of the conduit.

An aspirator assembly for inflating an emergency slide. The aspirator assembly includes a bell housing, a mixing chamber, and a nozzle assembly. The bell housing includes a ring defining an inlet port at which a check valve is located and into which ambient air can flow. The mixing chamber has an outlet port. The nozzle assembly is located in the mixing chamber and includes plural passageway sections defining concentric rings and cross bars. The passageway sections include internal passageways in communication with plural nozzle jets through which a compressed air is introduced into the mixing chamber to mix with the ambient air. The passageway sections are of an airfoil shape cross-section having a rounded leading end directed towards the inlet port and a trailing end is directed toward the outlet port to reduce air turbulence within the mixing chamber.

When an ejector having a variable nozzle and a variable throttle mechanism are integrated together as an ejector module, a nozzle-side central axis CL1 and a decompression-side driving mechanism have a twisted positional relationship, if the nozzle-side central axis CL1 is defined as a central axis of a nozzle-side driving mechanism in a displacement direction in which the nozzle-side driving mechanism of the ejector having the variable nozzle displaces a needle valve, and the decompression-side central axis CL2 is defined as a central axis of a decompression-side driving mechanism in a displacement direction in which the decompression-side driving mechanism of the variable throttle mechanism displaces a throttle valve. When viewed from the central axis direction of one of the nozzle-side central axis CL1 and the decompression-side central axis CL2, a driving portion corresponding to the one central axis is disposed to overlap with the other central axis.

A fan includes a central hub defining an inlet, a motor positioned within the central hub, and an impeller positioned within the central hub. The impeller is operable to be rotated by the motor to generate air movement. The fan also includes a nozzle defining a channel that receives the airflow from the central hub. The nozzle also defines an outlet in communication with the channel to direct air out of the nozzle. The fan further includes a plurality of conduits connecting the nozzle to the central hub to direct air from the central hub to the channel and through the outlet of the nozzle. The nozzle defines a projection aligned with each conduit to divide air movement through the nozzle.

A fan includes a central hub defining an inlet, a motor positioned within the central hub, and an impeller positioned within the central hub. The impeller is operable to be rotated by the motor to generate air movement. The fan also includes a nozzle defining a channel that receives the airflow from the central hub. The nozzle also defines an outlet in communication with the channel to direct air out of the nozzle. The fan further includes a plurality of conduits connecting the nozzle to the central hub to direct air from the central hub to the channel and through the outlet of the nozzle. The nozzle defines a projection aligned with each conduit to divide air movement through the nozzle.

A blower includes: a fan; a lower body having an inner space to receive the fan, and a suction hole; a first upper body communicating with the inner space and having a surface with a first discharge hole; a first damper movably coupled to the first upper body and penetrating the surface; the first damper having a first end facing an outside of the first upper body and a second end opposite to the first end; and a first bar extending along and coupled to the second end of the first damper.

A dual direction vacuum apparatus for creating vacuum and purging obstructions from a vacuum port of the apparatus. The apparatus provides a housing having an air passageway, wherein the air passageway has a first end and a second end. A vacuum pressure inlet is formed in the housing and is adaptable to receive pressurized air from a pressurized air source to create vacuum in the vacuum port and establish a vacuum mode. A purge pressure inlet is formed in the housing and adaptable to receive pressurized air from a pressurized air source to direct pressurized air toward the vacuum port to establish a purge mode and dislodge any obstructions from the vacuum port.