A method of retrofitting an environmental control system of an aircraft includes inserting the orifice plate through the connector slot and the connector ring slot into the receptacle. The method also includes aligning the covering portion with the connector slot.

The invention proposes a system and a method for the selective extraction of viscous hydrocarbons from tanks and other containers. The system comprises the following components for heating the hydrocarbons: a steam ejector -3-, in which there takes place an eddy diffusion of its drive steam with the gases it aspirates by means of the Venturi effect, and a perimetric heating conduit -5- externally attached to the tank or container. The method comprises the following operations: heating a surface layer of hydrocarbons by means of the gases injected by the steam ejector, causing a selective flow of hot hydrocarbons to the perimetric conduit; localized heating of the hydrocarbons with the perimetric conduit, causing the precipitation of water and a selective flow of the hottest hydrocarbons to an extraction pump; and extracting the precipitated water and the hydrocarbons flowing selectively from the perimetric conduit by means of two pumps.

The invention proposes a system and a method for the selective extraction of viscous hydrocarbons from tanks and other containers. The system comprises the following components for heating the hydrocarbons: a steam ejector -3-, in which there takes place an eddy diffusion of its drive steam with the gases it aspirates by means of the Venturi effect, and a perimetric heating conduit -5- externally attached to the tank or container. The method comprises the following operations: heating a surface layer of hydrocarbons by means of the gases injected by the steam ejector, causing a selective flow of hot hydrocarbons to the perimetric conduit; localized heating of the hydrocarbons with the perimetric conduit, causing the precipitation of water and a selective flow of the hottest hydrocarbons to an extraction pump; and extracting the precipitated water and the hydrocarbons flowing selectively from the perimetric conduit by means of two pumps.

A method for cleaning an air duct, in particular an air duct of a rail vehicle. The need to cool at least one load connected to the air duct is determined, the need to clean the air duct is determined, and a cleaning process of the air duct is initiated if there is no or a low need to cool the at least one load connected to the air duct and if there is a need to clean the air duct. There is also described an air intake system.

A method for cleaning an air duct, in particular an air duct of a rail vehicle. The need to cool at least one load connected to the air duct is determined, the need to clean the air duct is determined, and a cleaning process of the air duct is initiated if there is no or a low need to cool the at least one load connected to the air duct and if there is a need to clean the air duct. There is also described an air intake system.

An apparatus for automatically cleaning a nozzle of a gas supply system is provided. The apparatus includes a carrier with a gas inlet that is adapted to sealingly mate with the nozzle of the gas supply system and an automated nozzle cleaning system in the carrier. The automated nozzle cleaning system includes a first nozzle cleaning device, a second nozzle cleaning device, and a function switching plate. The function switching plate comprises a plurality of through holes, a first through hole of the plurality of through holes is configured to engage the first nozzle cleaning device with the gas inlet when the function switching plate is positioned at a first position, and a second through hole of the plurality of through holes is configured to engage the second nozzle cleaning device with the gas inlet when the function switching plate is positioned at a second position.

An apparatus for automatically cleaning a nozzle of a gas supply system is provided. The apparatus includes a carrier with a gas inlet that is adapted to sealingly mate with the nozzle of the gas supply system and an automated nozzle cleaning system in the carrier. The automated nozzle cleaning system includes a first nozzle cleaning device, a second nozzle cleaning device, and a function switching plate. The function switching plate comprises a plurality of through holes, a first through hole of the plurality of through holes is configured to engage the first nozzle cleaning device with the gas inlet when the function switching plate is positioned at a first position, and a second through hole of the plurality of through holes is configured to engage the second nozzle cleaning device with the gas inlet when the function switching plate is positioned at a second position.

Disclosed embodiments include an apparatus for reducing contamination or obstruction of a multi-directional flow filtration system. As one example, a scalper that is to be employed on a multi-directional flow filtration system comprises a body and a set of scalping walls forming a plurality of helical chambers, the set of scalping walls helically extending along at least a portion of an interior of the body in a longitudinal direction. In this way, the plurality of helical chambers may enable the multi-directional flow filtration system to passively scalp contaminants in a manner that improves overall operation of the multi-directional flow filtration system. Other embodiments may be described and/or claimed.

Provided is a self-cleaning electric nasal aspirator. The self-cleaning electric nasal aspirator includes a suction assembly. The suction assembly includes a suction nozzle and a storage compartment. The suction nozzle is in communication with the storage compartment. The storage compartment is configured to temporarily store nasal mucus sucked out through the suction nozzle. The suction assembly further includes a suction compartment and a storage compartment cover. The storage compartment cover is disposed at an upper end of the storage compartment. A liquid storage space is formed by being enclosed by the storage compartment cover and the storage compartment. The suction compartment is sleeved outside the storage compartment and the storage compartment cover. The self-cleaning electric nasal aspirator can prevent nasal mucus from overflowing to the surface of the self-cleaning electric nasal aspirator and has a self-cleaning function.

Provided is a self-cleaning electric nasal aspirator. The self-cleaning electric nasal aspirator includes a suction assembly. The suction assembly includes a suction nozzle and a storage compartment. The suction nozzle is in communication with the storage compartment. The storage compartment is configured to temporarily store nasal mucus sucked out through the suction nozzle. The suction assembly further includes a suction compartment and a storage compartment cover. The storage compartment cover is disposed at an upper end of the storage compartment. A liquid storage space is formed by being enclosed by the storage compartment cover and the storage compartment. The suction compartment is sleeved outside the storage compartment and the storage compartment cover. The self-cleaning electric nasal aspirator can prevent nasal mucus from overflowing to the surface of the self-cleaning electric nasal aspirator and has a self-cleaning function.