Abstract: A self-contained foul air eliminator comprises a housing with an intake port an impeller, a converter, and an exhaust port. The converter includes an oxidizing agent and an aqueous solution of a promoter. The eliminator is typically portable to eliminate malodors foul air from a toilet or another environment. The device is powered by a battery or a household current.

Abstract: A fuel gas-steam reformer assembly, preferably an autothermal reformer assembly, for use in a fuel cell power plant, includes a catalyst bed which is formed from a cylindrical monolithic open cell foam body. The foam body is preferably formed from a high temperature material such as stainless steel, nickel alloys and Iron-aluminum alloys, or from a ceramic material. The foam body includes open cells or pores which are contained within the metal or ceramic lattice. The lattice is coated with a porous wash coat which serves as a high surface area substrate onto which catalysts used in the reformer are applied. The foam body has an inlet end into which a mixture of fuel, steam and air is fed to begin the reforming process. An inlet portion of the foam body may be provided with an iron oxide and/or noble metal catalyst and the remainder of the foam body may be provided with a copper, copper/zinc and/or noble metal catalyst.

Abstract: A honeycomb structure having, in the axial direction, a number of through-channels separated by partition walls, which honeycomb structure contains refractory particles and a vitreous component and is porous. Although the honeycomb structure contains refractory particles such as silicon carbide particles or the like, it can be produced at a relatively low firing temperature; therefore, the honeycomb structure has a low production cost and a high yield and can be provided at a low price.

Abstract: In an air conditioning system which includes a catalytic air purifier, a control system is provided for sensing the level of predetermined conditions in a space and for responsively modulating the air purification process in a manner which optimizes the process in terms of its effectiveness and its economical use. The conditions that are sensed include the levels of VOC's, CO2, and biological contaminants, as well as degree of occupancy, relative humidity and air flow. The air purification process is modulated by varying the power to a UV lamp, turning one or more UV lamps on or off, varying the effectiveness of the catalyst, varying the volume or speed of the air flowstream and/or varying the relative humidity in the space.

Abstract: A honeycomb body made from a ceramic material with improved radial pressure resistance that is of cylindrical shape and features a first and a second end face and a cylindrical shell and that is traversed from one end face to the other by axially parallel channels formed by channel walls and distributed across the cross section of the honeycomb body in a regular grid pattern, in which design an outer marginal zone of the honeycomb body, the thickness of which amounts to several channel diameters, encloses a central area. The increase in radial pressure resistance of the honeycomb body is achieved by reinforcing the ceramic material of the cylindrical shell and of the channel walls in the outer marginal zone of the honeycomb body by depositing on or in it one or several inorganic substances for the purpose of increasing its mechanical stability.

Abstract: Modification, neutralization and/or decontamination of airborne biological and/or chemical contaminants from a breathable atmosphere by subjecting the breathable atmosphere to a filter which is formed from a plurality of polymeric multilobal fibers. These fibers include a central core with T-shaped lobes projecting therefrom, wherein each T-shaped lobe has a leg and a cap. The lobes define a longitudinally extending internal cavity between two adjacent legs that extends the entire length of the fiber. The filter is impregnated with a biological and/or chemical decontamination reagent for chemically modifying, neutralizing and/or decontaminating airborne biological and/or chemical contaminants from a breathable atmosphere. A filter projection preferably extends into an external reservoir containing a supply of biological and/or chemical decontamination reagent. This configuration increases the capacity and efficiency of the filter, and causes a lower pressure differential across the filter.

Abstract: The invention provides an improved ceramic packing element having the basic shape of a cylinder with an aspect ratio, defined by the diameter to length dimensions that is from 2.7 to 4.5.

Abstract: A fragrance emanating device for freshening atmospheric air has (i) a closed container for accommodating a liquid fragrance composition in its interior, (ii) an emanator having a surface open to the ambient air for evaporation of the liquid fragrance composition, and (iii) a conduit linking the emanator surface with the liquid fragrance composition in the interior of the container. The components of the device are so dimensioned that, in use, thermal expansion of air and/or liquid in the container, resulting from an increase in temperature, causes a portion of the fragrance composition to travel along the conduit from the container to the emanator surface, and thermal contraction of the air and/or liquid in the container, resulting from a decrease in temperature, causes air from the atmosphere to enter the container via the conduit.

Abstract: A method for separating technical and biological polymers by generating two liquid phases using an added gas or an adjusted temperature. The separated polymers are obtained in solution with a high degree of purity. Complete separation can be achieved by subsequently performing liquid chromatography during which the corresponding trace component irreversibly adheres to the column while the other trace component is not retarded.

Abstract: A portable air purifier system and apparatus which includes a multi-element filter pack that is replaceable as a single unit, thus facilitating health safety of maintenance personnel. By serially disposing filter elements in order of descending sizes of particulates, filtering is improved. Selectably includable within the filters are materials that are particularly efficacious in removing contaminants such as acetone, ammonia, ozone, carbon monoxide, carbon dioxide, ethanol, methane, ethane, methanol, formaldehyde, hydrogen sulfide and other hazardous substances. By including an ultra-violet light source directed onto an activated charcoal layer, germicidal action is facilitated, and noise is abated through the advantageous employment of an expanded plenum and multiple right angle bends in air passageways.

Abstract: The present invention provides a garbage disposal machine and includes a body and a disposal tub installed in the body to put in garbage and garbage disposal materials that decompose the garbage. An agitator agitates the garbage and garbage disposal materials in the disposal tub. A warm air inductor induces warm air into the disposal tub, circulating the gas developed in the process of garbage decomposing in the disposal tub and sends the gas into the disposal tub. Part of the gas circulated by the warm air inductor is exhausted through an exhaust passage. The gas in the exhaust passage is deodorized and exhausted and ejected to the outside.

Abstract: An incense burner is provided with an upper compartment comprising a bottom, surrounding side wall structure, and an open top. An array of openings is provided in the bottom that permits air to move upwardly through the bottom into a burning chamber defined above the bottom and interiorally of the surrounding side wall structure. A series of legs extends downwardly from the bottom to where they join a base. An open space is defined between the bottom and the base. In addition, there is provided a series of side openings that are formed between the bottom and the base, and between the respective legs. This enables air to move inwardly through the side openings into the space between the bottom and the base, and therefrom upwardly through the array of openings in the bottom into the burning chamber of the incense burner.

Abstract: The plants are disposed on a near-vertical matrix panel of porous or fibrous inert material, in which the roots of the plants are embedded. Hydroponic water trickles down the panel, keeping the roots wet. A fan draws the air to be treated horizontally through the panel. The unit freshens stale air in a room. It may be provided as a wall-mounted unit, or as a self-standing tower unit.

Abstract: Domestic appliances are provided with a catalytic deodorizing coating, prepared by applying a coating material containing a polycondensate of at least one hydrolysable organosilane, optionally one or more compounds of glass-forming elements, and particles of one or more catalytically active transition metal oxides, and then heat-treating the applied coating material.

Abstract: This system consists of a static device (1) provided with ultraviolet ray lamps (12), fixed permanently inside the air duct (2) near the inlet in the circuit, to disinfect the incoming air flow. The system also includes a mobile device (3) to be periodically inserted inside the duct (2) and moved inside in order to fully disinfect the duct. This device consists of an axle (31), on which ultraviolet ray lamps (34) are assembled, end discs (32 and 33) provided with wheels (35 and 36) on the edge, and traction and retention cables (38 and 39).

Abstract: A ceramic carrier and ceramic catalyst body used as NOx purification catalysts for lean burn engines, which are inexpensive, exhibit high temperature durability and can maintain their catalytic function for extended periods. The ceramic carrier has a diffusion-inhibiting layer formed on the surface of a cordierite honeycomb structure, to inhibit diffusion of alkali metals, alkaline earth metals, etc. carried as NOx storage materials. The diffusion-inhibiting layer is composed of a ceramic material such as Y2O3, NiO or CeO2 which does not react with alkali metals or alkaline earth metals at temperatures of up to 1000° C. and has a melting point of higher than 1000° C., and the diffusion-inhibiting layer inhibits diffusion of catalyst components such as potassium into the interior to prevent their reaction with cordierite, so that the durability is greatly enhanced without reducing catalytic performance.

Abstract: Disclosed herein is an odor eliminating fiber structure having an indicator comprising a fiber substrate containing odor eliminating fibers, a surface thereof being visibly determined for change of odor eliminating power with a difference between a color of the fiber substrate discoloring through adsorption of a smelling gas and a color of a standard color display part.

Abstract: Devices and methods using freshening agents, such as perfumes, synthetic fragrances, deodorizers, fragrance fixing agents or mixtures thereof, for freshening the air exhausting from a vacuum cleaner during operation. One embodiment includes a thin, flexible sheet capable of being vacuumed into a vacuum cleaner, wherein the sheet has the freshening agent bound thereto. Methods for utilizing such a device are also disclosed. A second embodiment includes a disposable vacuum cleaner bag wherein at least a portion of the vacuum cleaner bag has the freshening agent bound thereto. A third embodiment includes a tubular collar to be affixed to the inlet tube of a vacuum cleaner, wherein the collar has the freshening agent bound thereto. The applied fragrance shall have a higher or greater impact on the olfactory senses of the vacuum cleaner operator than does the malodorous exhaust.

Abstract: The invention concerns a device for filtering gas comprising a microporous or microfibrous adsorbent filter (6) and means for forcing an air flow between an exhaust hood (2) and outlet duct (3) for the filtered air. The invention is characterized in that it comprises liquid spraying means (18) and centrifuging means arranged between the spray means and the filtered gas outlet. The particles wetted by the sprayer are blocked by the internal rotary filter and discharged with the carrier liquid towards an external container (10).

Abstract: A method and an apparatus for purifying a gas containing contaminants are disclosed. The gas is irradiated with an ultraviolet ray and/or a radiation ray so as to produce microparticles of the contaminants. The resultant microparticles of the contaminants are contacted with a photocatalyst. Then, the photocatalyst is irradiated with light so as to decompose the contaminants held in contact with the photocatalyst. Organic compounds, organosilicon compounds, basic gas and the like can be decomposed by the action of the photocatalyst. Even when these species are present at a low concentration, they can be concentrated locally by transforming into microparticles, and hence can be removed.

Abstract: Method and apparatus for treating the atmosphere to lower the concentration of pollutants, such as ozone, hydrocarbons, nitrogen oxides, sulfur oxides, carbon monoxide and the like, therein in which ambient air is passed into operative contact with a stationary substrate such as an automobile at rest, a billboard, an air conditioning unit, a transportation tunnel and the like, the stationary substrate having at least one ambient air contacting surface having a pollutant treating composition, such as manganese compounds, copper compounds, platinum group metals and compounds thereof, precious metals, and the like, thereon.

Abstract: Photocatalyst filter, method for fabricating the same, and air cleaner thereof, the photocatalyst filter including a base material of a required shape, an enamel layer consisting of frit for forming an inorganic layer and additives for forming a porous surface layer as main composition coated on a surface of the base material, and a photocatalyst layer consisting of a photocatalyst solution consisting of a photocatalyst and a dispersion solvent and bonding agents as main composition coated on the enamel layer, and the method including the steps of (1) coating an enamel layer on a surface of a base material subjected to pretreatment for removal of foreign matters, the enamel layer consisting of frit for forming an inorganic layer on a surface of the base material and additives for forming a porous surface layer on the surface of the base material as main composition, and (2) coating a photocatalyst layer on the enamel layer; the photocatalyst layer consisting of a photocatalyst solution and bonding agents as m

Abstract: The disclosure relates to an apparatus for removing a sterilant from a sterilant containing atmosphere of a room comprising an enclosure (10) having an inlet (13) to receive sterilant containing air from the room following sterilization of the room, outlet nozzles (17) to return air from which sterilant has been removed to atmosphere and a catalyst (15) within the enclosure for removing sterilant from the air. A fan (14) draws sterilant containing air from the inlet through the catalyst and thence to atmosphere. An additional fan (18) is provided to circulate air containing sterilant from the room during a room sterilization process through that part of the enclosure which is downstream of the catalyst to ensure sterility of that part of the enclosure for the sterilant removal phase.

Abstract: A method and system are provided for simulating the metabolic consumption of oxygen contained in a breathable gas. A variable volume chamber cyclically increases/decreases in volume to receive the breathable gas/expel an exhaust gas. Hydrogen and carbon dioxide are introduced into the chamber to mix with the breathable gas to form the exhaust gas. Hydrogen is introduced in an amount sufficient to react with an amount of the oxygen in the exhaust gas equivalent to that used by a human during a selected level of activity. Carbon dioxide is introduced in an amount equivalent to that provided by a metabolic respiratory quotient associated with the same level of activity. A catalyst, exposed to the exhaust gas, causes a reaction between the hydrogen and oxygen in the exhaust gas to generate simulated human exhalation.

Abstract: The invention provides a portable or hand-held vacuum cleaner that includes a filtration system or filtration module that can pick up particles and contaminants. It has a first passive stage (such as a HEPA filter) to collect dust particles, and contaminants over a predetermined size. The invention also includes an active stage filter(such as an ozone generator) which may include one or more chemical (or biological) agents effective to kill bacteria, viruses, and the like.

Abstract: A scent dispensing apparatus attachable to a flashlight body for heating of a liquid scent medium. The device includes a flashlight attachment having coupled thereto a heating apparatus that includes a resistive element submerged in a reservoir containing scent medium.

Abstract: A filter material having a supporting structure which supports and absorption filter layer, which in turn contains an additive having a biocidal effect.

Abstract: The present invention reduces the amount of oxygen in an oxygen-containing gas within a closed environment. A selected amount of hydrogen gas is mixed with a portion of the oxygen-containing gas from the closed environment to form a first gas mixture. A catalyst exposed to the first gas mixture causes a reaction between the hydrogen and at least a portion of the oxygen therein. The resulting second gas mixture, which is returned to the closed environment, has a lower percentage of oxygen. At least one oxygen sensor is positioned in the closed environment to determine when oxygen levels in the closed environment reach a threshold level. The output signal from the sensor is used to control when and/or how much hydrogen is mixed in the first gas mixture.

Abstract: A method and apparatus for releasing fragrance. An embodiment of the apparatus includes a first scented layer that releases a first portion of fragrance and a second scented layer adjacent to the first layer that releases a second portion of fragrance. The second portion of fragrance is released after the first portion of fragrance is released. Exemplary applications include air fresheners and fragrance samplers.

Abstract: A multi-layer deodorizing device having at least one generally flat, fragrance-infused layer enabling cloaking of unpleasant odors, at least one odor-absorbent layer enabling substantial removal of malodors from a surface or personal article, and a specialized shape enabling deodorization of a targeted personal article, such as for exemplary purposes only, a shoe, wherein an individual desires to utilize a temporary storage period to remove odors and refresh a personal article, such as a shoe.

Abstract: An apparatus and method are provided, which enable an air modifying agent such as an insecticide, pesticide, insect repellant, fragrance, perfume etc. to be disseminated into an atmosphere. The air modifying agent is entrained in a flammable liquid carrier (2) which is less volative than the agent, which is held in a container (1). A wick (3) draws the agent/carrier (2) up to an igniting station provided at the rim (5) of a metal collar (4) which closely encircles the wick (3). The collar (4) is provided with a pair of diametrically opposed elongate slots (8), which expose part of the wick (3) to the atmosphere and thereby provide a vaporisation station spaced below the igniting station and disposed in the path of the flammable liquid carrier.

Abstract: An ultraviolet disinfection (UV) system for gases including a UV light-ready gas purifier having at least one portal in the gas purifier for receiving UV light input from a UV light source, which is removably connected to the gas purifier via a connector at the portal, and positioned to provide a focused, controllable UV light output that has at least one UV dose zone for providing effective sterilization of microorganisms and disinfection within an interior of the gas purifier. The light source is positioned within a housing that is external to the gas purifier and capable of being connected thereto via optical connectors, such as fiber optic transmission lines. A method for UV disinfection of the interior of gas purifiers is also included in the present invention.

Abstract: A self-contained foul air eliminator comprises a housing with an intake port an impeller, a converter, and an exhaust port. The converter includes an oxidizing agent and an aqueous solution of a promoter. The eliminator is typically portable to eliminate malodors foul air from a toilet or another environment. The device is powered by a battery or a household current.

Abstract: A method of dispensing fragrant vapor into the ambient. A container having a fragrant material and a reactant system therein is provided, wherein the reactant system generates heat when an aqueous solution is added to the container. An aqueous solution is then added to the container such that the reactant system generates heat which releases fragrant vapor. A device for dispensing fragrance is also provided.

Abstract: An aromatic bag freshener specifically for the interior of various types of carrying bags, including handbags and athletic bags, provides a highly perforated, hollow, decorative holder that allows the insertion and placement of pre-scented material within the holder. Fragrance may escape from the pre-scented material to the ambient environment within the bag through the perforated area of the holder. The holder may take the shape of a teardrop, flower petal, geometric shape, or the like, and extends from a decorative chain, strap or other attachment element with an end hook, pin, or magnetic clasp to fasten the holder to the inside of the bag. The scent carrying material may comprise pre-scented wax-based material, scented molded polymer, formed absorbent carrier material infused with fragrance, or other scented material. The holder, and scented insert are organized into a kit which has a matching color coded position, emotive word, and/or associated name for each fragrance.

Abstract: A diffuser includes a base portion and a lid portion. The diffuser is adapted to allow emanation of vapor from a burning block of combustible material and contains a block receiving portion elevated from a surface of the base portion. The block receiving portion has one or more grooves formed in a top surface of the block receiving portion and extending below the top surface of the block receiving portion. The base portion further includes apertures forming channels extending from within the base portion to an outer surface of the base portion. The lid portion is preferably substantially pyramidal in shape and has an apex at an end remote from the base portion. The lid portion further includes apertures positioned towards the apex. In use, a burning block of combustible material, impregnated with fragrance, is placed on the block receiving portion, and the lid portion is placed over the block.

Abstract: A converter for transforming malodorous components of foul air comprises a porous layer having an oxidizing agent and an aqueous solution of a promoter. The promoter is preferably a water-soluble ethylene oxide or propylene oxide adduct. The layer is typically used in a gas-handling system to eliminate the foul air from a toilet or a bedpan. The layer can be used alone or with a second layer of activated charcoal. A Lewis acid and/or a Lewis base can be also used with the converter.

Abstract: The present invention provides a system and method for the treatment of hazardous biological materials being exhausted from sewer and grease trap vents. These vents may be located on the roof of public schools, commercial kitchens or multiple occupant restroom facilities. The method eliminates odors and kills bacteria associated with said emissions from sewer and grease trap vents. These emissions are neutralized when exposed to a mixture of ozone and ultraviolet radiation.

Abstract: A method of enhancing oxidation of air contaminants on an ultra-low density, UV light accessible aerogel photocatalyst is provided. The method includes the steps of providing a photocatalytic reactor system broadly comprising a photocatalytic reactor cell, a UV light source, and a pump to force the contaminated air stream through the photocatalytic reactor cell. The photocatalytic reactor cell includes glass cell. A catalyst bed formed of a titanium dioxide aerogel is provided in the glass cell whereby a high fraction of the titanium dioxide aerogel is accessible to UV light and gas. The catalyst bed is exposed to UV light from the UV light source and a contaminated air stream is introduced into the photocatalytic reactor cell such that the air stream passes through the catalyst bed causing oxidation of the contaminants of the air stream.

Abstract: An adsorptive decomposition deodorizing element comprising of a heating unit having an electrical heating unit inserted between laminated mica plates and a deodorizing unit located on the peripheral surface of said heating unit which can be heated very quickly, gives little offensive odor even in the step of regeneration by heating, and has a light weight and an excellent processability.

Abstract: The present invention relates to the passage and device of an air purifier having a plurality of filter layers of light catalyst disposed layer by layer on a predetermined space, and a plurality of engraved openings formed on the surface of each filter layer, and a plurality of recessions formed on the surface panel. When each filter layer is stacked, the recession of each filter layer is disposed on surface of each filter layer below, and forms an isolating section at where the recession lands such that a plurality of passages having appropriate gaps between every two filter layers and every two isolating sections. The air can pass through the passage between two filter layers and thus accomplishes the disinfections effect, and such device can be installed between a base having a fan and a cover having a gas inlet and a gas outlet where an infrared light illuminates each filter layer.

Abstract: An air-freshener for a vehicle, in particular a motorcar, provided with a housing into which a container for a volatile liquid or a liquid containing one or more volatile components can be inserted, in the opening of which container a wick extending into the housing is fitted. There are further present a covering cap which, when the container with wick has been inserted into the housing, is movable up and down over the wick, and control means for setting the position of the covering cap.

Abstract: An air purification system for purifying recirculated air eg in an aircraft, vehicle, offices or hospitals comprises the combination of a filter section with an ultraviolet illumination section and a coating of an antimicrobial agent on surfaces in one or both of the filter and illumination sections. Air flow through the illumination section is caused to be slightly turbulent by means of a multi-bladed fan being fixed in position between the filter and illumination sections. This increases the dwell time of contaminants in the illumination section. The antimicrobial agent includes as an active ingredient a quarternary ammonium salt and preferably as the following structure.

Abstract: In an air conditioning system which includes a catalytic air purifier, a control system is provided for sensing the level of predetermined conditions in a space and for responsively modulating the air purification process in a manner which optimizes the process in terms of its effectiveness and its economical use. The conditions that are sensed include the levels of VOC's, CO2, and biological contaminants, as well as degree of occupancy, relative humidity and air flow. The air purification process is modulated by varying the power to a UV lamp, turning one or more UV lamps on or off, varying the effectiveness of the catalyst, varying the volume or speed of the air flowstream and/or varying the relative humidity in the space.

Abstract: An oxygen-concentrating equipment comprising an oxygen-concentrating means for separating oxygen from air and concentrating the oxygen, a humidifying means for humidifying the oxygen-concentrated air produced by said oxygen-concentrating means, and an oxygen-supplying means for supplying the humidified oxygen-concentrated air to a user, characterized in that said humidifying means has at least a cation-conducting solid electrolyte membrane equipped with electrodes on both the sides of the membrane and an electric source for applying an electric current to said electrodes.

Abstract: A device for purifying air within a room. The device includes a housing having a plurality of air inlet ports and a plurality of air outlet ports. An ultraviolet ray generator is positioned within the housing along with a fan for drawing air into the housing through the air inlet ports. A passageway leading from the air inlet ports and encircling the ultraviolet ray generator to the air outlet ports provides a path for air drawn into the housing. The ultraviolet rays produced by the generator kill bacteria, germs and viruses in the air passing thereby through the passageway and the passageway maximizes a distance traveled by the air through the housing and thereby maximizing exposure of the air to the ultraviolet rays. The device also generates ozone for neutralizing undesirable odors, such as stale tobacco smoke and mildew in the air drawn into the housing.

Abstract: An apparatus and method for ultraviolet irradiation of air for the purpose of removing contaminants from that air is disclosed. A U-shaped ultraviolet bulb enshrouded within a quartz tube provides enhanced contaminant destruction characteristics. By combining a plurality of those bulbs in a chamber that is of polished aluminum, and further combining aluminum filters therewith, added irradiation enhancement is achieved. Further provided are baffles or baffling proximate the ultraviolet bulbs that cause the air to go turbulent thus drawing the air closer to the ultraviolet bulb and further enhancing the contaminant destruction characteristics. Moreover disclosed is treatment of substrates with a chemical agent that facilitates the arrest of contaminants from the air onto the substrate for further irradiation of the contaminants from the bulbs. This further irradiation breaks down the arrested contaminants thus providing the substrate with a self-cleansing effect.

Abstract: A method and apparatus for purifying air to deactivate toxic chemical and biological species such as Sarin, mustard gas, phosgene, cyanogen chloride, Anthrax spores, E. coli bacteria, Salmonella bacteria, Hepatitis virus, and Norwalk virus. The apparatus comprises a reaction chamber coupled to a counterflow heat exchanger. Incoming contaminated air is directed through a heating side of a counterflow heat exchanger to preheat it. The air is further heated to a temperature of at least 200° C., which is sufficient to deactivate common biological toxic species. Optionally, the reaction chamber may include a catalyst on a surface area over which the heated air is directed, which enables a thermocatalytic reaction that is particularly effective in deactivating biological and chemical warfare agents, such as anthrax and Sarin.

Abstract: A purifying agent or the like which can improve purifying performance is obtained. A container (12) of a purifying agent generating apparatus (10) contains a solution (14), into which a surface-active agent has been dissolved, and ozone gas is supplied thereto. In this way, a purifying agent (34) (i.e., aggregate of ozone-containing bubbles (32), each of which includes an ozone-containing membrane, into which ozone has been dissolved, and ozone-containing gas, which is contained in the inner portion of the membrane and includes ozone) is generated. Therefore, odor which fills a sealed space can be removed and a higher purifying performance is obtained.

Abstract: A fragrance emanating device for freshening atmospheric air has (i) a closed container for accommodating a liquid fragrance composition in its interior, (ii) an emanator having a surface open to the ambient air for evaporation of the liquid fragrance composition, and (iii) a conduit linking the emanator surface with the liquid fragrance composition in the interior of the container. The components of the device are so dimensioned that, in use, thermal expansion of air and/or liquid in the container, resulting from an increase in temperature, causes a portion of the fragrance composition to travel along the conduit from the container to the emanator surface, and thermal contraction of the air and/or liquid in the container, resulting from a decrease in temperature, causes air from the atmosphere to enter the container via the conduit.