Patent Description:
Aircraft often include confined spaces. A passenger's experience within those confined spaces can be improved through better scents. High end scent generation is today available in multiple forms. For example, scent marketing is used to enhance customer experience in retail stores, food and beverage stores, casino and hotels. The aim is typically to put the customer in a positive mood or to otherwise make the customer feel comfortable.

<CIT>, <CIT>, <CIT>, <CIT>, <CIT> present air treatment solutions for use in aeroplanes.

In accordance with a first aspect of the present disclosure there is provided a fragrance dispensing system for an aircraft that includes a fuselage defining a cabin interior and an environmental control system (ECS). The ECS includes a source of air that moves air between the source of air and the cabin interior along an airflow path, a mixer unit in airflow communication with the source of air and positioned downstream from the source of air in the airflow path, at least a first air duct positioned in the airflow path between the mixer unit and the cabin interior, and a fragrance dispensing unit positioned between the air source and the cabin interior along the airflow path. The fragrance dispensing unit is configured to dispense at least a first fragrance into the airflow path.

In a preferred embodiment, the first fragrance dispensing unit includes a scent assembly that contains a first fragrance oil that comprises the first fragrance. Preferably, the first fragrance dispensing unit is configured to selectively dispense at least first and second fragrances into the airflow path. In a preferred embodiment, the first fragrance dispensing unit is configured to dispense the first fragrance into the mixer unit or at another point between the air source and a point where the airflow path splits off into separate ducts. In a preferred embodiment, the first fragrance dispensing unit includes a first fragrance cartridge therein that includes a scent assembly with the first fragrance therein. The first fragrance cartridge includes a cover that is movable between a closed position and an open position and the first fragrance is dispensed when the cover is in the open position. In an embodiment, the first fragrance dispensing unit also includes a second fragrance cartridge therein that includes a scent assembly with a second fragrance. The second fragrance cartridge includes a cover that is movable between a closed position and an open position where the second fragrance is dispensed.

In a preferred embodiment, at least first and second air ducts are positioned in the airflow path between the mixer unit and the cabin interior and the cabin interior includes at least first and second zones. The first fragrance dispensing unit is positioned between the mixer unit and the cabin interior and is configured to dispense the first fragrance into the first duct along the airflow path and into the first zone and a second fragrance dispensing unit is positioned between the mixer unit and the cabin interior and is configured to dispense the first fragrance (which may be the same scent or a different scent as what is dispensed from the first fragrance dispensing unit) into the second duct along the airflow path and into the second zone. Preferably, the first and second fragrance dispensing units are separately controllable so that fragrances can be delivered to the first and second zones as desired. In another embodiment the first and second fragrance dispensing units can be controlled together.

In a preferred embodiment, the first fragrance dispensing unit is configured to selectively dispense at least first and second fragrances into the first duct and the second fragrance dispensing unit is configured to selectively dispense at least first and second fragrances into the second duct. Preferably, the first fragrance dispensing unit includes a first fragrance cartridge therein that includes a scent assembly with the first fragrance therein. The first fragrance cartridge includes a cover that is movable between a closed position and an open position, such that the first fragrance is dispensed when the cover is in the open position. Preferably, the first fragrance dispensing unit includes a second fragrance cartridge therein that includes a scent assembly with the second fragrance therein. The second fragrance cartridge includes a cover that is movable between a closed position and an open position, such that the second fragrance is dispensed when the cover is in the open position.

In a preferred embodiment, the fragrance dispensing unit is in electrical communication with an electrical control unit and the first fragrance dispensing unit is configured to selectively dispense the first fragrance based on instructions from the electrical control unit. Preferably, the electrical control unit includes a human machine interface, and the instructions can be provided via human input. The human machine interface can be associated with or on the electrical control unit or can be a separate unit, such as a portable touch screen display.

In accordance with another aspect of the present disclosure there is provided an aircraft that includes a fuselage defining a cabin interior, and a fragrance delivery system disposed in the cabin interior. The fragrance delivery system includes a first fragrance dispensing unit that includes a first fragrance cartridge with a first scent and a second fragrance cartridge with a second scent, a first electronic control unit in communication with the first fragrance dispensing unit, and a human machine interface in communication with the first electronic control unit. The first fragrance dispensing unit is configured to selectively dispense either the first fragrance or the second fragrance.

In a preferred embodiment, the cabin interior is divided into at least first and second zones. The first fragrance dispensing unit is positioned in the first zone and a second fragrance dispensing unit is positioned in the second zone. The second fragrance dispensing unit is in communication with a second electrical control unit and the second electrical control unit is in communication with the human machine interface. In a preferred embodiment, a third fragrance dispensing unit is positioned in the first zone. The third fragrance dispensing unit is in communication with the first electrical control unit. The first and third fragrance dispensing units can be controlled together (such that they dispense the same fragrance) or separately.

In a preferred embodiment, the first fragrance dispensing unit includes a first fragrance cartridge therein that includes a first near field communication portion that includes information related to the first fragrance cartridge stored therein. The first near field communication portion is in communication with a receiver in the first fragrance dispensing unit, which in turn transmits the information related to the first fragrance cartridge to the electrical control unit and ultimately to the human machine interface (where it can be displayed).

In accordance with yet another aspect, there is provided a fragrance dispensing unit that includes a housing that defines an interior and includes at least one intake opening and at least one outlet opening and an airflow path that is defined between the intake opening and the outlet opening. The unit also includes a fan positioned along the airflow path, and at least a first cartridge positioned along the airflow path. The first cartridge includes a cover that is movable between a closed position and an open position, and includes a scent assembly that is not in flow communication with the airflow path when the first cover is in the closed position and that is in flow communication with the airflow path when the first cover is in the open position.

In a preferred embodiment, the first cartridge is removably received in a first fragrance module and includes a near field communication transmitter therein that includes information about the first cartridge stored therein. The first fragrance module includes a near field communication receiver for receiving the information about the first cartridge. Preferably, the fragrance delivery unit also includes a second cartridge positioned along the airflow path that is removably received in a second fragrance module. The second cartridge includes a cover that is movable between a closed position and an open position and includes a near field communication transmitter therein that includes information about the second cartridge. The second fragrance module includes a near field communication receiver for receiving the information about the first cartridge.

In a preferred embodiment, the first fragrance module includes a rotatable portion that is in engagement with the first cartridge. Rotational movement of the rotatable portion moves the cover of the first cartridge between the open and closed positions along a linear path.

In accordance with another aspect of the present invention there is provided a method of dispensing fragrances in an aircraft that includes an environmental control system. The method includes positioning a fragrance dispensing unit at a point along an airflow path between an air source (e.g., an engine or APU) and the cabin interior. The method can also include dispensing a first fragrance from the fragrance dispensing unit into the airflow path and into the cabin interior, stopping dispensing the first fragrance and then dispensing a second fragrance from the fragrance dispensing unit into the airflow path and into the cabin interior. The fragrance dispensing unit can be positioned to dispense the first and/or second fragrances at a point between the air source and the mixer unit, into the mixer unit and/or between the mixer unit and the cabin interior. The method can also include providing or obtaining a plurality of fragrance dispensing units and positioning them between the mixer unit and the cabin interior such that they each can dispense a fragrance or fragrances into separate ducts each associated with a different zone in the aircraft.

In accordance with another aspect of the present disclosure there is provided a scent delivery assembly that includes a main body portion that defines an interior and includes at least one intake opening and at least one outlet opening, an airflow path that is defined between the intake opening and the outlet opening, a fan positioned along the airflow path, and at least a first cartridge positioned along the airflow path. The first cartridge includes a first cover that is movable between a closed position and an open position and a scent assembly. The scent assembly is not in flow communication with the airflow path when the first cover is in the closed position, and the scent assembly is in flow communication with the airflow path when the first cover is in the open position. In a preferred embodiment, the scent assembly includes a reservoir portion and a diffusing portion. Preferably, the scent delivery system also includes a second and third cartridges positioned along the airflow path. In a preferred embodiment, each of the cartridges has a different scent associated therewith. Preferably, the scents are chosen to affect a user or passenger's mood. For example, the scents can be chosen to energize, calm, relax, etc. Preferably, the scent delivery assembly also includes a controller that is configured to selectively move the first, second and third covers between the open and closed positions.

In a preferred embodiment the scent delivery assembly includes a first actuator that includes a first arm that is movable between a first position and a second position. The first cartridge is attached to a distal end of the first arm. When the first arm is in the first position the first cover is in the closed position and when the first arm is in the second position the first cover is in the open position. Preferably, the main body portion includes a divider member positioned in the interior that divides the interior into an airflow path portion and a non-airflow path portion. The first cartridge is position in the airflow path portion and the first actuator is position in the non-airflow path portion.

In a preferred embodiment, the first cartridge includes a housing portion and the cover portion. The housing portion includes an attachment opening therein and the distal end of the first actuator arm is releasably received in the attachment opening. Preferably, when the first cover is in the closed position the scent assembly is not aligned with the airflow path and when the first cover is in the open position the scent assembly is generally aligned with the airflow path. In a preferred embodiment, the scent delivery system includes at least first and second positioning pegs positioned adjacent an exterior surface of the first cartridge.

In a preferred embodiment, the scent delivery system includes a motor that is operable to move the first cover between the open and closed positions. In a preferred embodiment, the first cartridge includes a second cover that is movable via the motor together with the first cover between the closed position and the open position and the scent assembly is positioned in the airflow path between the first cover and the second cover. In a preferred embodiment, the main body portion includes a lower housing portion and an upper housing portion that cooperate to define the interior and the intake opening is defined in the lower housing portion and the outlet opening is defined in the upper housing portion. Preferably, the scent delivery system includes a removable tray portion received in a tray portion recess defined in the lower housing portion. The tray portion includes a first cartridge opening defined therethrough and the first cartridge is removably received in the first cartridge opening. Preferably, the upper housing portion is pivotally connected to the lower housing portion. In a preferred embodiment, the motor includes an arm extending therefrom that is configured to move the first cover between the open and closed positions. Preferably, the cartridge is sealed when it is in the closed position.

In a preferred embodiment, the first, second and third cartridges each include a scent associated therewith and are configured to communicate the scent to the controller. Preferably, the controller is configured to communicate the scent identification to a control panel (e.g., a tablet, smart phone, etc.) that includes a user interface (such as a graphical user interface on the tablet).

The present invention provides the ability to enrich the air within the cabin of an aircraft with a predetermined scent. In other words, the present invention provides the ability to deliver a scent from a fragrance or the like to a passenger onboard an aircraft.

In a preferred embodiment, the disclosure includes scent cartridges and a control panel (such as a tablet or other remote control) for controlling the delivery of the scented air.

In a preferred embodiment, the system includes the ability to control at least one of the scent of the cabin, the lighting (mood lighting), the music, the inflight entertainment and the cabin temperature. The ability to control one or all of these items helps set the mood of the cabin and can bring added value to the passenger experience. Being able to control remotely or not the scent/ fragrance diffused in the cabin or part of the cabin (e.g., a private room) of an aircraft together with ambient/personal lights and/or sound (music) and/or entertainment system and/or environmental control system provide the ability to diffuse and control the scent in the cabin/part of cabin. Combined control of ambiance featured by the different scent diffused in the cabin and/or the light and/or sound effect to set a specific mood.

The control panel/tablet can be in communication with the controller within the scent delivery system via a wired or wireless (e.g., Wi-Fi) connection. Preferably, the scent delivery system includes a plurality of cartridges that can provide different scents as desired by the user. The controller also preferably controls the fan settings (e.g., speed, duration, number of cycles, etc.). For example, the fan may run one minute on and then two minutes off or two minutes at a reduced speed. The controller also preferably controls the opening and closing of the cartridges to enhance the scent experience by passengers.

As described herein and shown in the accompanying drawings, the present disclosure provides the ability for in-flight fragrance delivery onboard an aircraft. In-flight fragrance delivery includes exemplary embodiments disclosed herein and in the accompanying drawings that include in-flight fragrance delivery in VVIP and VIP aircraft, business aviation aircraft and commercial aviation aircraft. Additional embodiments can similarly include military aircraft, medical aircraft and experimental aircraft.

VVIP and VIP Aircraft include the ultimate top-of-the-line aircraft accommodation experience with the most luxurious accoutrements. This embodiment includes fragrance delivery for each "room" or zone within the aircraft, independent of or integrated with the Environmental Control System (ECS) zones. In use, a user selects independent fragrances from a palette or controller for each zone, multiple zones or the entire cabin. The fragrance can be tumed on and off for each zone independently, multiple zones or the entire cabin. Fragrances can be selected from a library of catalog fragrances, a duplicated fragrance experience or custom designed fragrances. The fragrance delivery system can be integrated into the aircraft ECS or be a stand-alone supplement to the ECS. Fragrance control can be integrated into the aircraft Cabin Management System (CMS) or a stand-alone supplement to the CMS.

Business aviation aircraft include an upscale experience on aircraft dedicated for business or personal use. These aircraft are often outfitted with upscale accommodations for passengers. This embodiment includes consistent fragrance delivery for the entirety of the aircraft passenger space, independent of or integrated with the Environmental Control System (ECS) zones or for individual zones. Fragrances can be selected from a library of catalog fragrances, a duplicated fragrance experience or custom designed fragrances. The fragrance delivery system can be integrated into the aircraft ECS or be a stand-alone supplement to the ECS. Fragrance control can be integrated into aircraft Cabin Management System (CMS) or a be a stand-alone supplement to the CMS.

Commercial aviation aircraft are often outfitted with varying levels of accommodations for passengers. The fragrance delivery can be employed for the entirety of the aircraft passenger space, seating class zones or individualized for each passenger space. The fragrance delivery operates independent of or can be integrated with the Environmental Control System (ECS) zones. Fragrances can be selected from a library of catalog fragrances, a duplicated fragrance experience or custom designed fragrances. Fragrance control can be integrated into aircraft Passenger Service Unit (PSU) controls, the In Flight Entertainment (IFE) system or a be a stand-alone control system.

The fragrance dispersion unit taught herein contains single or multiple fragrance cartridge modules. Each module houses one fragrance that can be presented to be used upon demand. The fragrance cartridge is self-sealing and houses a wetted fragrance wick. The drive motor in the fragrance module opens the cartridge on demand and exposes the wetted wick to a forced airflow provided by an electric fan within the fragrance dispersion unit (FDU). The fragrance cartridge also contains a near field communication (NFC) chip which is encoded with information, such as, the name of the fragrance, the manufacturing date, a unique identifier, and a color code. The NFC chip communicates the encoded information to the controller or controllers (see, e.g., <FIG>). The fragrance name and color code are used to display information for the user on the controller or controllers. The manufacturing date is used to monitor shelf life and cartridge usage life to the controller. Usage life is limited to ensure the quality of the fragrance throughout its life. The data is encrypted to make the cartridge tamper resistant. The controller keeps track of which fragrance cartridges are installed in each FDU or each zone if multiple FDU's are installed in a common zone.

Preferably, the fragrance module contains a drive motor to open the cartridge and an NFC reader to decode the NFC chip once the cartridge is inserted into the fragrance module. Information is transmitted to the controller or controllers which recognize the cartridge as new or in use and then displays it as an available fragrance on the human machine interface (HMI) touch screen. The controller utilizes a user friendly graphical user interface (GUI) on a touch-screen device for human interaction. The controller software maps all the available fragrances in each aircraft zone in its memory which can be accessed through a series of menus on demand. To activate a fragrance, the user selects an aircraft zone and is presented a list of available fragrances for that zone. Upon selection of the desired fragrance, the controller commands the FDU or FDU's in the selected zone to open the fragrance cartridge and operate the fan for fragrance dispersion. In a preferred embodiment, the controller keeps track of the usage time for each cartridge, notifying the user when a cartridge should be replaced. A localized LED light on the FDU or on each individual fragrance module is used to help identify which cartridge is to be replaced.

The controller can be a wired connection or a wireless device and the controller functions can be integrated into a central Cabin Management System (CMS).

The fragrance dispensing system taught herein can be integrated into the typical aircraft ECS. In a typical ECS, compressed air is taken off the engines, the auxiliary power unit (APU) or a ground cart. The air then goes through the A/C packs to cool it through a process of compression and expansion cycles. There are filters and water separators in the A/C packs as well. From there, the air is fed into the mixer unit where it is mixed with recirculated cabin air. For temperature control, the air is then fed through a heat exchanger. An alternate method for temperature controls is to pump uncooled bleed air into the mixer unit as well. From there, the conditioned and temperature controlled air is fed into the cabin. There are different duct lines for different zones in the cabin. Some of the air that is displaced from the cabin is dumped overboard and some is recirculated back into the mixer unit.

In the present disclosure, fragrance can be delivered into the cabin in two ways using the ECS. The first is inject it into the mixer unit. This yields evenly dispersed fragrance throughout the entire cabin. This scenario may be used by airlines and operators that are, for example, self-promoting their "scent brand" (i.e., passengers will associate the scent of the cabin with the airline). Alternatively, the fragrance can be introduced in the ducts between the mixer unit and the cabin sections. This allows for fragrance scenting cabin areas independently (e. different classes can be scented differently). The fragrance dispensing system can be controlled automatically such that fragrances are dispensed at predetermined times or at predetermined altitudes or the fragrance dispensing system can be controlled by a human machine interface, as described above.

It will be appreciated that business jet ECS's work similarly, but some do not recirculate cabin air. Business jets are also limited from one to four cabin zones. See also, <CIT>.

The invention may be more readily understood by referring to the accompanying drawings in which:.

Like numerals refer to like parts throughout the several views of the drawings.

The following description and drawings are illustrative and are not to be construed as limiting. Numerous specific details are described to provide a thorough understanding of the disclosure. However, in certain instances, well-known or conventional details are not described in order to avoid obscuring the description. References to one or an embodiment in the present disclosure can be, but not necessarily are references to the same embodiment; and, such references mean at least one of the embodiments.

Reference in this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the-disclosure. Similarly, various requirements are described which may be requirements for some embodiments but not other embodiments.

Certain terms that are used to describe the disclosure are discussed below, or elsewhere in the specification, to provide additional guidance to the practitioner regarding the description of the disclosure. For convenience, certain terms may be highlighted, for example using italics and/or quotation marks: The use of highlighting has no influence on the scope and meaning of a term; the scope and meaning of a term is the same, in the same context, whether or not it is highlighted.

It will be appreciated that the same thing can be said in more than one way. Consequently, alternative language and synonyms may be used for any one or more of the terms discussed herein. No special significance is to be placed upon whether or not a term is elaborated or discussed herein. Synonyms for certain terms are provided. The use of examples anywhere in this specification including examples of any terms discussed herein is illustrative only, and is not intended to further limit the scope and meaning of the disclosure or of any exemplified term.

Without intent to further limit the scope of the disclosure, examples of instruments, apparatus, methods and their related results according to the embodiments of the present disclosure are given below. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. In the case of conflict, the present document, including definitions, will control.

It will be appreciated that terms such as "front," "back," "top," "bottom," "side," "short," "long," "up," "down," "aft," "forward," "inboard," "outboard" and "below" used herein are merely for ease of description and refer to the orientation of the components as shown in the figures. It should be understood that any orientation of the components described herein is within the scope of the present invention.

Referring now to the drawings, wherein the showings are for purposes of illustrating the present invention and not for purposes of limiting the same, <FIG> show embodiments of scent delivery systems or assemblies <NUM> and <NUM>. In a preferred embodiment, the scent delivery assemblies are used in the interior of aircraft, as shown in <FIG>. However, this is not a limitation on the present invention and the scent delivery assemblies <NUM> and <NUM> can be used elsewhere.

With reference to <FIG>, scent delivery assembly <NUM> is shown and described. In a preferred embodiment, scent delivery assembly <NUM> includes a main body portion <NUM> that defines an interior <NUM> and includes at least one intake opening <NUM> and at least one outlet opening <NUM>. As shown in <FIG>, an airflow path P1 is defined between the intake opening <NUM> and the outlet opening <NUM>. A fan <NUM> is positioned along the airflow path P1. At least one and preferably a plurality of cartridges <NUM> are positioned along the airflow path P1. Each cartridge <NUM> includes a housing portion <NUM> that defines a housing interior <NUM>, a cover <NUM> and a scent assembly <NUM> positioned in the housing interior <NUM>. The cover <NUM> is movable between a closed position and an open position. In a preferred embodiment, the scent assembly <NUM> is movable together with the cover <NUM> between the closed and opened positions. The scent assembly <NUM> is not in flow communication with the airflow path P1 when the cover <NUM> is in the closed position and is in flow communication with the airflow path P1 when the cover <NUM> is in the open position. <FIG> show the middle cartridge <NUM> with the cover <NUM> and scent assembly <NUM> in the open position and the top and bottom cartridges <NUM> with the cover <NUM> and scent assembly <NUM> in the closed position.

As shown in <FIG>, the main body portion <NUM> includes a housing <NUM> having a divider member <NUM> that divides the interior <NUM> into an airflow path portion <NUM> and a non-airflow path portion <NUM>. The cartridges <NUM> are positioned in the in the airflow path portion <NUM> and a plurality of actuators <NUM> are positioned in the non-airflow path portion <NUM>.

<FIG> show a cartridge <NUM> and actuator <NUM>. In a preferred embodiment, the actuator <NUM> includes an arm <NUM> that is movable between a first position and a second position. The cartridge <NUM> is attached to a distal end of the arm <NUM>. As shown in <FIG>, the arms <NUM> extend through openings 34a in the divider member <NUM>. Preferably, the cartridge <NUM> is removable from the arm <NUM> so that the cartridges <NUM> can be replaced during use. The connection between the cartridge <NUM> and the arm <NUM> can be any connection that allows the cartridge <NUM> to be replaced. In a preferred embodiment, the arm <NUM> includes a connection member <NUM> on the end thereof. The connection member <NUM> includes flanges <NUM> on the bottom thereof that include openings 46a therein that receive a screw <NUM> to connect the connection member <NUM> to the arm <NUM>.

As shown in <FIG>, the connection member <NUM> also includes a circumferential groove <NUM> defined in its outer diameter that receives a spring <NUM> therein. The connection member <NUM> is received in an opening <NUM> in the bottom of the cartridge <NUM>. The cartridge <NUM> includes a groove <NUM> defined in the inner diameter that receives the spring <NUM>. This provides a snap fit relationship so that the cartridge <NUM> can be removed from the distal end of the arm <NUM>/connection member <NUM>. It will be appreciated that other methods of connection between the arm and cartridge are within the scope of the present invention, e.g., the cartridge can be threaded onto the arm or a friction fit can be used. The actuator <NUM> and cartridge <NUM> are referred to herein together as a cartridge assembly <NUM>. In a preferred embodiment, the force to install and remove the cartridge is sufficiently low to be done by hand (without tools), but enough force is required so that the cartridge is not disconnected during actuator operation and cartridge opening. However, this is not a limitation and in another embodiment, tools can be used.

In a preferred embodiment, the cartridge <NUM> includes a base member <NUM> in which opening <NUM> is defined. The base member <NUM> includes a shaft <NUM> extend therefrom that is connected at its distal end to the cover <NUM>. The shaft <NUM> is the spool that receives the scent assembly <NUM>. In a preferred embodiment, the scent assembly <NUM> includes a reservoir portion <NUM> and a diffusing portion <NUM>. The diffusing portion <NUM> is tubular and is received in a circular groove <NUM> defined in the base member <NUM> (a similar circular groove <NUM> is defined in the cover <NUM>). The reservoir portion <NUM> is received in the diffusing portion <NUM> and the shaft <NUM> is received in a central opening <NUM> in the reservoir portion <NUM>. In a preferred embodiment, the cartridge includes O-rings <NUM> that are seated in grooves and that seal the movable cover <NUM> and base member <NUM> against the stationary housing portion <NUM>. The O-rings <NUM> seal the cartridge every time it is closed to prevent scent contamination in the cabin and to prevent mixing of the scents when not in use.

It will be appreciated that the reservoir portion <NUM> is preferably made of a porous material that is impregnated with scented oil. In the open position, the diffusing portion <NUM> pulls the oil out of the reservoir portion <NUM> and evaporates it into the air as a result of the flow of air along the airflow path P1. Preferably, each of the cartridges <NUM> in the scent delivery assembly <NUM> includes a different scented oil in the reservoir portion <NUM>. The scents can be diffused to instill different moods or simply different scents into the environment (e.g., the room <NUM> or volume within the aircraft <NUM>; see <FIG>). It will be appreciated that the scent assembly <NUM>, including the reservoir portion <NUM> and the diffusing portion <NUM> can be any shape and is not limited to the cylindrical shape shown. For example, the scent assembly <NUM> can include a plurality of fins that extend in the same direction as the airflow. In another embodiment, the scent assembly <NUM> can include a plurality of openings therein. Generally, the scent assembly <NUM> includes the reservoir portion <NUM> that holds the scented oil and the diffusing portion <NUM>. Any shape of the components is within the scope of the present invention provided the airflow flows over or through the diffusing portion and pulls the oil from the reservoir portion and moves the scent out in to the environment.

In a preferred embodiment, the cover <NUM> includes at least one and preferably three alignment rods <NUM> that extend therefrom and into alignment openings <NUM> that are defined in the housing portion <NUM>. The movable portion of the cartridge <NUM> (e.g., the base member <NUM>, scent assembly <NUM>, cover <NUM>, shaft <NUM> and alignment rods <NUM>, etc.) are referred to together herein as the movable portion <NUM>.

In a preferred embodiment, the scent delivery system <NUM> includes a plurality of positioning pegs <NUM> positioned adjacent the exterior surface of the cartridges. The positioning pegs <NUM> make it easier to position the cartridge <NUM> when replacing a used one with a new one and are provided for fixing or clamping the housing portion <NUM> within the airflow path portion <NUM>.

As shown in <FIG>, in a preferred embodiment, the actuators <NUM> are attached via brackets <NUM> that are mounted on a mounting board <NUM> positioned in the non-airflow path portion <NUM>. Another board <NUM> can be mounted on the opposite side of the actuators <NUM>. In a preferred embodiment, the airflow path portion <NUM> is covered by a door <NUM> that is openable to replace the cartridges <NUM>.

The actuators <NUM> can include any type of mechanism capable of extending the arm <NUM> in a linear manner. In a preferred embodiment the arm <NUM> is movable within a housing <NUM> that slidably receives the arm and houses the mechanism for extending and retracting the arm <NUM>. The electronics for the actuator <NUM> are also preferably housed in the housing <NUM>. The actuators <NUM> are in communication with and controlled by a controller <NUM> that is part of a printed circuit board or the like.

<FIG> shows an exemplary embodiment of the communication between the controller <NUM> (which is preferably part of a PCB), the actuators <NUM>, the fan <NUM>, and the control panel. The controller and PCB are capable of communicating with the control panel (e.g., tablet, smart phone) wirelessly or on a device with buttons. It provides the actuators and fan proper input settings for selecting the proper cartridge (from user selection) and proper settings (fan speed etc.) depending on room size, scent selected, etc..

In a preferred embodiment, the controller <NUM> is in communication with the cartridges (e.g., through RFID or other wireless communication) so that the controller <NUM> can identify the particular scent associated with the cartridge and to monitor the cartridge (e.g., scent oil remaining, how long the cartridge has been in use, etc.). For example, the cartridge can include an RFID tag or other transmitter attached thereto and the controller can include a receiver to recognize the cartridge scent once installed. This will then populate the control pad or other human machine interface (e.g., tablet) so that it is apparent what scent is in the particular cartridge (e.g., energetic, calming, relaxing, etc.). Generally, it will be appreciated that the controller <NUM> can selectively move the covers <NUM> (and, therefore, the scent assemblies <NUM>) between the open and closed positions.

In use, when a user wants to diffuse a scent into the environment, the user pushes a button or the like on the tablet or other control panel. The tablet communicates with the controller <NUM> of the scent delivery assembly <NUM>, which, in turn, actuates the actuator <NUM> of the appropriate cartridge assembly <NUM>. When the actuator <NUM> is actuated arm <NUM> moves from the first position to the second position and the movable portion <NUM> (which includes the cover <NUM>) is moved from the closed position to the open position. Because the distal end of arm <NUM> is engaged with opening <NUM>, as arm <NUM> moves to the second position it moves base member <NUM>, which moves the scent assembly <NUM> and shaft <NUM> together with cover <NUM>. The alignment rods <NUM> also move within alignment openings <NUM>. The controller <NUM> also actuates fan <NUM>, thereby pulling air through intake opening <NUM> and moving air along airflow path P1. As a result of air flowing over the exposed diffusing portion <NUM>, oil is pulled from the reservoir portion <NUM>, is expelled through outlet opening <NUM> and released into the environment.

In a preferred embodiment, as shown in <FIG>, the cartridges <NUM> are positioned so that the scent assemblies <NUM> are generally out of the air flow path P1 when the covers <NUM> are in the closed position, and are extended into or are aligned with the airflow path P1 when the covers <NUM> are in the open position.

With reference to <FIG>, scent delivery assembly <NUM> is shown and described. In a preferred embodiment, scent delivery assembly <NUM> includes a main body portion <NUM> that defines an interior <NUM> and includes at least one intake opening <NUM> and at least one outlet opening <NUM>. As shown in <FIG>, an airflow path P2 is defined between the intake opening <NUM> and the outlet opening <NUM>. A fan <NUM> is positioned along the airflow path P2. At least one and preferably a plurality of cartridges <NUM> are positioned along the airflow path P2. As shown in <FIG>, each cartridge <NUM> includes a housing portion <NUM> that defines a housing interior <NUM>, a first cover <NUM> and a scent assembly <NUM> positioned in the housing interior <NUM>. The first cover <NUM> is movable between a closed position and an open position. In a preferred embodiment, the cartridge <NUM> includes a second cover <NUM> that is movable together with the first cover <NUM> between the closed position and the open position. It will be appreciated that the scent assembly <NUM> is positioned between the first cover <NUM> and the second cover <NUM> when the first and second covers are in the closed position and is therefore not in flow communication with the airflow path P2 when the first and second covers are in the closed position. The scent assembly <NUM> is in flow communication with the airflow path P2 when the first and second covers <NUM> and <NUM> are in the open position. <FIG> shows one cartridge <NUM> with the first cover <NUM> in the open position and the other two cartridges <NUM> with their first covers <NUM> in the closed position.

As shown in <FIG>, in a preferred embodiment, the main body portion <NUM> includes a lower housing portion <NUM> and an upper housing portion <NUM> that cooperate to define the interior <NUM>. The intake openings <NUM> are is defined in the lower housing portion <NUM> and the outlet opening <NUM> is defined in the upper housing portion <NUM>. Preferably, the upper housing portion <NUM> is hingedly connected (see hinges <NUM>) to the lower housing portion <NUM>. However, in another embodiment, the upper housing portion <NUM> can be removable. As shown in <FIG>, the upper housing portion <NUM> includes openings <NUM> therein that are generally aligned with the cartridges <NUM>.

As shown in <FIG>, the scent delivery assembly <NUM> includes a removable tray portion <NUM> that is received in a tray portion recess <NUM> that is defined in the lower housing portion <NUM> and includes a ledge <NUM>. The tray portion <NUM> includes a plurality of cartridge openings <NUM> that receive the cartridges <NUM>. In a preferred embodiment, the housing portion <NUM> of the cartridges <NUM> is tapered and the cartridge openings <NUM> include a similar taper to hold the cartridges in place (the taper can be seen in <FIG>), and allows them to be removed and replaced. In a preferred embodiment, the tray portion <NUM> and tray portion recess <NUM> include complementary male and female alignment members <NUM>. In the drawings, the male alignment member is shown in the tray portion <NUM> and the female alignment members are shown defined in the lower housing portion <NUM> in the tray portion recess <NUM>. However, this arrangement can be reversed. The upper housing portion <NUM> also includes alignment members <NUM> for aligning with the tray portion <NUM> The fan <NUM> is positioned in an opening <NUM> in the lower housing portion <NUM>. Preferably, the fan <NUM> includes tabs <NUM> that mate with complementary tabs <NUM> on the lower housing portion to position and secure the fan <NUM>.

<FIG> best shows a cartridge <NUM>. As shown, the cartridge <NUM> includes the housing <NUM>, with the interior <NUM>, which is preferably a cylindrical opening, first and second covers <NUM> and <NUM> and the scent assembly <NUM>. Preferably, the scent assembly <NUM> includes an inner diffusing portion <NUM> and an outer reservoir portion <NUM>. The second cover <NUM> (the lower cover) has a pivot shaft <NUM> extending therefrom that extends through a pivot opening <NUM> defined in the housing portion <NUM>. The pivot shaft <NUM> is connected to the first cover <NUM> by a threaded fastener <NUM>. Preferably, a spring <NUM> (e.g., a torsion spring) is received on the pivot shaft <NUM> and into the pivot opening <NUM> and biases the first and second covers <NUM> and <NUM> toward the closed position. In another embodiment, the pivot shaft <NUM> can extend from the first cover <NUM>. In another embodiment, the pivot shaft <NUM> can be removably connected (via a threaded fastener or the like) to both the first and the second cover. Similar to the first embodiment, the cartridges <NUM> reseal when closed to keep scent from diffusing therefrom.

As shown in <FIG>, in a preferred embodiment, the scent delivery assembly includes a motor <NUM> that is operable to move the first cover <NUM> (and, therefore, the second cover <NUM>) between the open and closed positions. The motor <NUM> includes an arm <NUM> extending therefrom that includes a finger <NUM> on the distal end thereof. The motor <NUM> can move the arm in a rotational manner. In use, when the arm <NUM> rotates the finger <NUM> contacts the first cover <NUM> of a cartridge <NUM> and pivots the first cover <NUM> to the open position. To close the first cover <NUM>, the arm <NUM> continues to rotate in the same direction, and, because of the curved shape of the first cover <NUM>, once the arm <NUM> passes the first cover <NUM>, the spring <NUM> biases the first cover <NUM> back to the closed position. Because the first cover <NUM> is connected to the second cover <NUM> via the shaft <NUM>, the second cover <NUM> always pivots with the first cover <NUM>. In another embodiment, the arm can rotate the opposite direction (of the opening direction) to allow the cover to close.

Similar to the embodiment described above, the scent delivery assembly <NUM> includes a controller <NUM> that controls the motor <NUM> and thereby the opening and closing of the first and second covers. The controller also controls the operation of the fan.

In use, when a user wants to diffuse a scent into the environment, the user pushes a button or the like on the tablet or other control panel. The tablet communicates with the controller <NUM> of the scent delivery assembly <NUM>, which, in turn, actuates the motor <NUM>. The motor <NUM> rotates the arm <NUM> such that the first cover <NUM> of the appropriate cartridge <NUM> is pivoted to the open position. Because shaft <NUM> is attached to second cover <NUM>, the second cover <NUM> is also moved to the open position. This opens the scent assembly <NUM> to the airflow path P2. The controller <NUM> also actuates fan <NUM>, thereby pulling air through intake openings <NUM> and moving air along airflow path P2. As a result of air flowing over the exposed diffusing portion <NUM>, oil is pulled from the reservoir portion <NUM>, is expelled through outlet opening <NUM> and released into the environment.

<FIG> show another embodiment of a scent deliver assembly or fragrance dispensing unit <NUM> in accordance with a preferred embodiment of the present invention. The fragrance dispensing unit <NUM> includes one or more fragrance modules <NUM> therein. The fragrance modules <NUM> are each configured to receive a fragrance cartridge <NUM>. The present invention also includes a method or system for using or integrating a plurality of fragrance dispensing units <NUM> within one or more zones in an aircraft.

The fragrance dispensing unit <NUM> is best shown in <FIG>. As shown in <FIG>, in a preferred embodiment, the fragrance dispensing unit <NUM> includes a housing <NUM> with an inlet <NUM>, an outlet <NUM> and a cover or door <NUM> that is pivotally connected to the housing <NUM>. <FIG> shows the dispensing unit <NUM> without the door <NUM>. As shown, the interior of the housing <NUM> includes a plurality of fragrance modules <NUM>, a fan <NUM> for pulling air into the housing interior, and a tray <NUM>. The fragrance modules <NUM> are disposed on the tray <NUM>, which is movable out of the front of the housing so that the fragrance cartridges <NUM> (two are shown in <FIG>, one in the open position and one in the closed position) can be replaced or the fragrance modules <NUM> can be removed. In other words, the tray <NUM> is movable between an open and a closed position. It will be appreciated that the fragrance dispensing unit <NUM> can include as few as one fragrance module <NUM> or more than four fragrance modules <NUM>. Any number of fragrance modules within a single fragrance dispensing unit <NUM> is within the scope of the present invention.

In a preferred embodiment, the fragrance dispensing unit <NUM> is designed to contain any flames or fire within the housing. In a preferred embodiment, a flame arrester (not shown) is positioned in the interior and adjacent the outlet <NUM>. Any type of flame arrester can be used. For example, the flame arrester can be a heat exchanger that draws heat out of flame and disperses it along the housing. This type of flame arrester includes a steel honeycomb that the air goes through and is cooled to extinguish any flame.

<FIG> and <FIG> show a fragrance module <NUM>. As shown in <FIG>, the fragrance module <NUM> includes a housing <NUM> and a cartridge enclosure <NUM> that includes an opening <NUM> for receiving a fragrance cartridge <NUM> (not shown in <FIG> and <FIG> shows an exploded view of the interior of the fragrance module <NUM> with the housing omitted. As shown, the interior includes a motor <NUM>, a PCB <NUM> in communication with the motor <NUM>, the cartridge enclosure <NUM>, an LED <NUM> and a base <NUM>. In a preferred embodiment, the motor <NUM> is a DC motor. However, this is not a limitation on the present invention. The base <NUM> includes a rotatable plate <NUM> having a plurality of protrusions <NUM> extending outwardly therefrom. As described more fully below, the protrusions <NUM> engage with slots on the fragrance cartridge <NUM>. In use, the motor <NUM> rotates the rotatable plate <NUM> and protrusions <NUM> to rotate a component in the fragrance cartridge <NUM> to open the fragrance cartridge <NUM> to expose the scent assembly. The scent assembly can be any component that includes the ability to wick away a scent. In a preferred embodiment, the scent assembly is taught in <CIT>, the entirety of which is incorporated by reference herein.

In a preferred embodiment, the cartridge enclosure <NUM> includes a plurality of balls or protrusions <NUM> that are biased inwardly into the module interior. The protrusions <NUM> cooperate with and are seated in indentations or dimples <NUM> defined in or on the outside of the cartridge <NUM>. Therefore, when the cartridge <NUM> is loaded into the module <NUM> through the front opening <NUM> and into the module interior, the protrusions <NUM> are biased (by a spring or the like) into the indentations. In a preferred embodiment, the protrusions are ball bearings that are partially pressed through openings <NUM> in the cartridge enclosure <NUM> by a spring.

Preferably, the cartridge enclosure <NUM> includes connection protrusions <NUM> extending outwardly therefrom and that include openings <NUM> defined therein. The openings <NUM> receive posts <NUM> extends outwardly from the base <NUM>. Long threaded fasteners (not shown) are received in the front opening <NUM> and extend into an opening in post <NUM> to secure the cartridge enclosure <NUM> on the base <NUM>. The base <NUM> can also include threaded fasteners <NUM> that extend into openings in the back of the cartridge enclosure <NUM>.

<FIG> show the fragrance cartridge <NUM>, which is received in the module interior of the fragrance module <NUM>. As shown, in a preferred embodiment, the cartridge <NUM> is shaped to fit into the cartridge enclosure <NUM> in the module <NUM>. As shown in <FIG>, the cartridge <NUM> generally includes a housing portion <NUM> that defines a housing interior <NUM>, a cover <NUM>, a movable scent assembly <NUM>, and a communication portion <NUM>. The movable scent assembly <NUM> includes an exteriorly threaded post <NUM> with female threads and an interiorly threaded cylinder <NUM> with male threads. The opposite threading arrangement can be used. The scent assembly <NUM> also includes a wick or scented portion <NUM>. The threaded engagement of the post <NUM> and cylinder <NUM> allow the cylinder <NUM>, on which the scented portion <NUM> is mounted, together with the cover <NUM> to move between a closed position and an open position. Rotational motion of the rotatable plate <NUM> is translated to linear or axial motion of the scented portion <NUM>.

As shown in <FIG>, the threaded post <NUM> includes a disk <NUM> on the bottom thereof that has slots <NUM> defined therein. These slots <NUM> receive the protrusions <NUM> in the module <NUM>. Therefore, when the motor <NUM> turns the rotatable plate <NUM> and protrusions <NUM>, as a result of the engagement of the protrusions <NUM> and the slots <NUM>, the post <NUM> is rotated. Then, as a result of the engagement of the threads on the post <NUM> and cylinder <NUM> the post <NUM>, scented portion <NUM> and cover <NUM> move outwardly to the open position and to expose the scented portion <NUM>. Rotation of the rotatable plate <NUM> and protrusions <NUM> in the opposite direction causes the components to move to the closed position. In a preferred embodiment, the protrusions <NUM> are spring-loaded outwardly so that when the cartridge <NUM> is inserted into the module <NUM>, but the slots <NUM> are not properly aligned, the protrusions <NUM> are pushed up into the slots <NUM> after proper alignment. However this is not a limitation on the present invention.

In a preferred embodiment, the fragrance technology is dry dispersion. As will be appreciated by those of ordinary skill in the art, the oils are evaporated by air being blown across a wetted wick (scent portion <NUM>). In a preferred embodiment, the scent portion <NUM> includes an inner reservoir that holds the scented oil and an outer diffusing portion, similar to scent portion <NUM> above. The dry fragrances are dispersed in molecular form and preferably leave little to no residue on surfaces. The dry type preferably results in a high dispersion rate of the fragrance in cabin environment.

In a preferred embodiment, the distal end of the rotatable cylinder <NUM> is received in a recess in the bottom of the cover <NUM> and includes a key <NUM> that is received in a corresponding slot. Preferably, the rotatable cylinder <NUM> also includes a base <NUM> that seats the scented portion <NUM>. Preferably, the base <NUM> includes a key or protrusion <NUM> that is received in a slot <NUM> defined in the interior of the housing portion <NUM>. The arrangement between the protrusions <NUM> and slot <NUM> help keep the components in alignment when moving between the open and closed positions. The indentations <NUM>, described above, that cooperate with the protrusions <NUM> in the module <NUM> are shown in <FIG>.

In a preferred embodiment, the cartridge <NUM> includes near field communication technology (NFC) that communicates with NFC in the module <NUM>, the FDU <NUM> or other component. As shown in <FIG>, preferably, the NFC chip or the like is housed in the communication portion <NUM> and is positioned behind a bottom cover <NUM>.

<FIG> shows a LOPA (layout of passenger accommodation) of a VIP aircraft that includes three zones (zone <NUM>, zone <NUM> and zone <NUM>). Within each zone is an electronic control unit <NUM> (ECU) that contains most of the electrical components of the system for the zone (and can be mounted on a wall or the like) and two fragrance dispensing units <NUM> (FDU). The fragrance dispensing units <NUM> communicate with the ECU <NUM> via a control cable <NUM> (or any wired connection) (they can also communicate wirelessly). The control units <NUM> communicate with one another and with a user interface device or HMI touch screen <NUM> via a CAN Bus data cable <NUM> (or any wired connection) (they can also communicate wirelessly). The user interface device <NUM> can be any device that includes buttons (touchscreen or analog) or other controls for allowing a user to turn the fragrance dispersion on or off, up or down, etc. In another embodiment, the user interface device can be integrated with or be a part of a central command unit on the aircraft that controls other features such as lights, temperature and entertainment. It will be appreciated that each zone can include a single FDU or two or more FDUs. In a preferred embodiment, the ECU includes the motor drivers for activating the motors <NUM> in the fragrance modules <NUM>. In another embodiment, the stand alone.

It will be appreciated by those of ordinary skill in the art that in a preferred embodiment of the present invention, the system includes smart cartridge technology (NFC encoding) and user error proofing (fragrance cross checking), it is modular and configurable for each custom aircraft, includes multiple fragrances, individually controlled zones, a central system control, each zone can be locally controlled, replaceable cartridges <NUM>, dry scent technology, wired/wireless interface. In another embodiment, the system does not include NFC encoding.

The system of the present invention allows the deliverability of customized fragrances throughout the aircraft environment. As shown in <FIG>, each zone is controlled locally by the ECU. However, in another embodiment, each zone, and each FDU within a zone, can be controlled by a central control system or they can each be controlled separately. In other words, the control system can control multiple cabin zones.

As discussed above, the fragrance dispersion units <NUM> each contain single or multiple fragrance modules <NUM>. If multiple fragrance modules <NUM> are included within an FDU, each module may contain a different fragrance, or all the modules may contain the same fragrance.

<FIG> show an exemplary embodiment of the graphical user interface on the controller or touchscreen <NUM> that is in communication with the one or more ECUs <NUM>. It will be appreciated that this same graphical user interface can be included on the individual ECUs <NUM> as well. The fragrance cartridges <NUM> each contain the near field communication (NFC) chip which is encoded with information such as the name of the fragrance, the manufacturing date, a unique identifier, and a color code (unique to a fragrance) or any combination of one or more of these features. The NFC chip communicates with the NFC antenna or coil in the fragrance module <NUM>, which, in turn, communicates the encoded information to the associated ECU <NUM>. The fragrance name and color code are used to display information for the user on the GUI <NUM>, as shown in <FIG>. The manufacturing date is communicated to monitor shelf life and cartridge usage life to the controller. Usage life is limited to ensure the quality of the fragrance throughout its life. The data is preferably encrypted to make the cartridge tamper resistant. However, in another embodiment it may not be encrypted. The controller keeps track of which fragrance cartridges are installed in each FDU or each zone if multiple FDU's are installed in a common zone.

In a preferred embodiment, the fragrance module <NUM> contains the drive motor <NUM> to open the cartridge <NUM> and an NFC reader, receiver, antenna or coil (can be part of the PCB <NUM>) to decode the NFC chip once the cartridge <NUM> is inserted into the fragrance module <NUM>. Information is then transmitted from the NFC chip, to the NFC reader and to the controller or controllers (ECU) which recognize the cartridge as new or in use and then displays it as an available fragrance on the touchscreen.

In a preferred embodiment, the controller utilizes a user friendly GUI on the touch-screen device for human interaction. The controller software maps all the available fragrances in each aircraft zone in its memory, which can be accessed through a series of menus. To activate a fragrance, the user selects an aircraft zone (see <FIG>) and is presented with a list of available fragrances for that zone (e.g., see any of <FIG>). Upon selection of the desired fragrance, the controller commands the FDU or FDUs in the selected zone to open the fragrance cartridge and operate the fan for fragrance dispersion. In a preferred embodiment, the system also includes the ability to control the density of the fragrance released. As shown in <FIG> (only numbered in <FIG>) the touchscreen includes a slider bar <NUM> for increasing or decreasing the fragrance density.

In a preferred embodiment, the controller keeps track of the usage time for each cartridge, notifying the user when a cartridge should be replaced. A localized LED light <NUM> (see <FIG>) on the module <NUM> or the FDU is used to help identify which cartridge is to be replaced. Furthermore, if a cartridge <NUM> is "empty" (the fragrance is all consumed), it will not be displayed on the controller or touchscreen. In a preferred embodiment, if a zone includes more than one FDU, each FDU includes the same scents or fragrances therein. In other words, if Fragrance <NUM> is included in the first FDU, but not in the second FDU, the controller will alert the user that there is an issue in that the fragrances do not match. However, if Fragrance <NUM> is located in both the first FDU and the second FDU, Fragrance <NUM> will appear as a choice on the controller or touchscreen for that zone. Therefore, only the fragrances that are in both FDUs are displayed for use. In another embodiment, the first and second FDUs can contain different fragrances.

<FIG> shows an environmental control system for a commercial aircraft <NUM> and how the fragrance dispensing system can be integrated into the ECS. The fragrance dispensing system taught herein can be integrated into the typical aircraft environmental control system (ECS) in any aircraft. In a typical ECS, compressed air is taken off the engines <NUM>, the auxiliary power unit (APU) <NUM> or a ground cart (not shown). The air then goes through the air conditioning packs <NUM> to cool it through a process of compression and expansion cycles. There are filters and water separators in the A/C packs as well. From there, the air is fed into a mixer unit <NUM> where it is mixed with recirculated cabin air. For temperature control, the air is then fed through a hot air manifold or heat exchanger <NUM>. An alternate method for temperature controls is to pump uncooled bleed air into the mixer unit as well. From there, the conditioned and temperature controlled air is fed into the cabin. There are different duct lines <NUM> for different zones in the cabin. The aircraft <NUM> in the exemplary embodiment includes eight passenger zones and the flight deck, as well as ducts leading to the cargo compartments. Some of the air that is displaced from the cabin is dumped overboard and some is recirculated back into the mixer unit.

In the present invention, fragrance can be delivered into the cabin in at least two ways using the ECS. The first is to inject the fragrance into the mixer unit <NUM> (see FDU <NUM> in <FIG>). This yields evenly dispersed fragrance throughout the entire cabin. This scenario may be used by airlines and operators that are, for example, self-promoting their "scent brand" (i.e., passengers will associate the scent of the cabin with the airline).

In another embodiment, the fragrance can be introduced in the ducts <NUM> between the mixer unit <NUM> and the zones or cabin sections. This allows for fragrance scenting cabin areas independently (e. different classes can be scented differently). In this embodiment, the system shown in <FIG> can be used, except that the FDUs (see the exemplary FDUs <NUM> in <FIG>) are positioned in or adjacent the ducts <NUM> to release fragrance into the ducts <NUM> as opposed to being located in a cabinet or other location within the zone.

To implement either of the systems discussed above (dispersion of fragrance in the mixing unit <NUM> or at some other point downstream of the ducts <NUM> for dispersion into the entire cabin or dispersion into separate ducts <NUM> for dispersion into zones), any of the scent delivery assemblies, fragrance dispensing units and/or systems can be used. For example, FDU <NUM> can be positioned in or in communication with the mixer unit <NUM> so that different scents can be dispersed into the mixer unit <NUM> and eventually into the cabin. FDU <NUM> can be in communication with a controller and/or a touch screen so that the scent dispersion from FDU <NUM> can be controlled from inside the cabin. In another embodiment, a different fragrance dispensing unit can be used, provided the ability to control the dispersion of one or more sense is included.

In another embodiment, a fragrance dispensing unit having one or more cartridges can be integrated into the personal service unit associated with each row or portion of a row of seats. This can provide control to individual passengers whether they are in a seat with others nearby or in their own room or suite.

Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise," "comprising," and the like are to be construed in an inclusive sense, as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to. " As used herein, the terms "connected," "coupled," or any variant thereof, means any connection or coupling, either direct or indirect, between two or more elements; the coupling of connection between the elements can be physical, logical, or a combination thereof. Additionally, the words "herein," "above," "below," and words of similar import, when used in this application, shall refer to this application as a whole and not to any particular portions of this application. Where the context permits, words in the above Detailed Description of the Preferred Embodiments using the singular or plural number may also include the plural or singular number respectively.

The above-detailed description of embodiments of the disclosure is not intended to be exhaustive or to limit the teachings to the precise form disclosed above. While specific embodiments of and examples for the disclosure are described above for illustrative purposes, various equivalent modifications are possible within the scope of the disclosure, as those skilled in the relevant art will recognize. Further, any specific numbers noted herein are only examples: alternative implementations may employ differing values, measurements or ranges.

The teachings of the disclosure provided herein can be applied to other systems, not necessarily the system described above. The elements and acts of the various embodiments described above can be combined to provide further embodiments. Any measurements described or used herein are merely exemplary and not a limitation on the present invention. Other measurements can be used. Further, any specific materials noted herein are only examples: alternative implementations may employ differing materials.

Claim 1:
An aircraft (<NUM>) comprising:
a fuselage defining a cabin interior including at least first and second zones, and
an environmental control system that includes
a source of air, wherein air flows between the source of air and the cabin interior along an airflow path (P1),
a mixer unit (<NUM>) in airflow communication with the source of air and positioned downstream from the source of air in the airflow path, wherein the mixer unit is configured to be fed air from said source of air and mix said air from said source of air with recirculated cabin air;
at least first and second air ducts (<NUM>) positioned in the airflow path between the mixer unit and the cabin interior,
a first fragrance dispensing unit (<NUM>, <NUM>, <NUM>) positioned between the mixer unit and the cabin interior along the airflow path, wherein the first fragrance dispensing unit is configured to dispense a first fragrance into the first duct along the airflow path and into the first zone, and
a second fragrance dispensing unit positioned between the mixer unit and the cabin interior along the airflow path, wherein the second fragrance dispensing unit is configured to dispense the first fragrance into the second duct along the airflow path and into the second zone.