Abstract: A ventilation system for a space includes an air supply partition configured to cause filtered air to flow into an area of the space, and an air exhaust partition in spaced-apart relationship with the air supply partition and configured to cause air to be drawn in and filtered from the area. The air supply partition and the air exhaust partition create a “push-pull” air flow across the area. A ventilation partition includes air inlets in a first portion of the housing, air outlets in a second portion of the housing, a filter, and a fan configured to draw air in through the air inlets, through the filter, and out through the air outlets. The partition is a portable, free-standing structure configured to be supported by a surface, such as a floor of a room in which the partition is located.

Abstract: An air purification piece and an air purification module including same. The air purification piece includes a substrate piece and a purification coating (4), which is provided on the outer surface of the substrate piece; the substrate piece comprises a first support piece (11), a second support piece (12) and a heating component (2), which is provided between the first support piece (11) and the second support piece (12).

Abstract: The present invention is a dust abatement device that secures over a container. Powdery material, such as plaster, cement, grout or the like, is poured through the device, and mixed with water inside the container. The device has a mounting sleeve and radial manifold. The manifold forms a radial pneumatic channel with a circumferentially disbursed air intake that generates a radially uniform airflow to draw in airborne dust that would otherwise escape to the surrounding air. The manifold is connected to a vacuum with an air filter, and generates a dust shield zone above and around the device, which only extends down from the manifold a few inches. The manifold also funnels material and water into the container, and forms an inner eave that spaces material and water from the air intake, and forms a splash guard to retain upwardly projected splashes of material and water inside the container.

Abstract: The present invention is a dust shield device that secures over a mixing pail. Powdery material, such as plaster, cement, grout or the like, is poured through the device, and mixed with water inside the pail. The device includes a mounting sleeve, a radial manifold housing and a funnel shaped lid. The manifold housing and lid form a radial pneumatic channel with a circumferentially disbursed air intake that generates a radially uniform airflow that draws in airborne dust that would otherwise escape to the surrounding air. The manifold is connected to a vacuum with an air filter, and generates a dust shield zone and air intake zone above the device. The manifold lid forms a radial guard to prevent downward flows of material and water from entering the manifold, and forms a splash guard to retain upwardly projected splashes of material and water inside the pail.

Abstract: Moisture separation systems and condensation devices for gas extracted from drilling fluids while drilling are provided. The condensation devices include a body having a first end and a second end and an exterior wall defining an interior surface, an interior passage providing a connection from the first end to the second end, and an angled support path within the interior passage, the angled support path extending from the interior surface and angled with respect to gravity. The angled support path is configured to direct a condensate away from the interior surface by the operation of gravity.

Abstract: A compressor system includes a compression module having an inlet for receiving air; and a filter housing in fluid communication with the compression module. The filter housing is constructed to house a filter, the filter having a sealing feature disposed at a first end of the filter and having an engagement feature disposed at a second end of the filter opposite the first end. The filter housing includes a trap door constructed to contact the engagement feature, and constructed to drive the engagement feature in a direction parallel to an axis of the filter toward the sealing feature and urge the sealing feature into sealing engagement with the filter housing.

Abstract: The present invention relates to a porous support intended to be removably positioned on a top side of a perforated plate of a table of a vacuum hold down device, the perforated plate having a bottom side connected to a vacuum system for producing reduced pressure on the bottom side, wherein the porous support comprises a perforated tray provided on one side with outer reliefs and on the other side with a blade penetrable porous structure fixed thereon. The invention further relates to a vacuum hold down device comprising such a support. The invention also relates to a process for replacing a first porous support by a second porous support in such a device.

Abstract: The cap assembly for a carbon canister fuel tank includes an outer cap and an inner cap. There is a cavity with an opening at the inner cap, and the outer cap is above the inner cap covering the opening. There is a lower vent cap in the cavity which divides the cavity into a filling cavity and a volume cavity. There is a through hole in the center of the lower vent cap with a breathing valve which would open automatically when there is air pressure imbalance in the filling cavity and volume cavity. The first vent hole is at the bottom of the volume cavity, while the second vent hole is at the bottom of the filling cavity. The first vent hole, breathing valve and the second vent hole are arranged in sequence to constitute the exhaust channel for the vaporizing oil gas in the fuel tank.

Abstract: A semi-enclosed air purifier for an air-conditioner having stable quality, good air purification and dust removal, little generation of ozone, high efficiency, low cost, safety and convenience is provided. The semi-enclosed air purifier comprises a cartridge comprising an assembly of electrostatic generating strips, an anode connector of FBT, and a cathode connector of FBT. The assembly of electrostatic generating strips comprises electrostatic generating strips. The semi-enclosed electrostatic generating strip comprises a PET resin strip and a conductive strip. The assembly of electrostatic generating strips comprises two or more positive conductive strips and the same amount of negative conductive strips. Insulating spacers are provided between adjacent electrostatic generating strips.

Abstract: The fuel tank cap with a charcoal canister includes a fuel tank inner cap and a fuel tank outer cap. A filling room with an upper opening is disposed in the center of the fuel tank inner cap. The fuel tank outer cap is disposed above the fuel tank inner cap. The fuel-absorption substrate is filled in the filling room, and a containing room is disposed at the bottom of the filling room. The fuel vapor can be absorbed by the filled charcoal completely, and the little liquid fuel entering from the fuel tank can be stored by the containing room and recycled back to the fuel tank when the gasoline engine stops. The filtering performance of charcoal powder can be enhanced since it is exempted from long-time fuel soaking.

Abstract: An agrichemical spray mask according to the present invention comprises: a main body (114) which is worn hermetically attached to the face and has an inhalation inlet port (110) and an exhalation outlet port (112); an anti-dust and anti-toxin filter tube (120) which is provided on the outside of the inhalation inlet port (110) of the main body (114) of the mask so as to link to the inhalation inlet port and is provided with an anti-dust and anti-toxin filter (113); and a spray filter tube which is separably fastened to the anti-dust and anti-toxin filter tube (120), has a spray filter (223) provided on the inside thereof, and has a respiration port (220a).

Abstract: A fluorine gas generating device 100 which is characterized by having a cylindrical member 31a for circulating therein the main-product gas, a gas feed port 51a for introducing the main-product gas into the cylindrical member 31a, a gas discharge port 52a for discharging the main-product gas from the cylindrical member 31a, an adsorbent holding member 201 arranged in the cylindrical member 31a to form a space to provide a channel for the main-product gas circulated in the cylindrical member 31a, a stirring blade 202 for stirring the main-product gas that is introduced through the gas feed port 51a, and a gas flow guiding cylinder 203 for circulating or diffusing the main-product gas in the space within the cylindrical member 31a.

Abstract: A filter assembly includes: a filter pad including fibers selected from wool fibers, wood-based viscose fibers, and cellulose-based synthetic fibers, the fibers configured to absorb grease particulates; a baffle-type filter; and a support bracket configured to support the filter pad. The support bracket includes: a clip portion that is substantially u-shaped; an attachment portion including a mounting hole formed in a surface thereof; and a support portion arranged between the clip portion and the attachment portion, the support portion configured to support the disposable filter thereon. The filter assembly includes a hanging bracket configured to support the filter pad therein, the hanging bracket including a front wall, an attachment wall including a mounting hole formed in a surface thereof, and a top wall, arranged between the front wall and attachment wall. The support bracket and the hanging bracket are configured to mount the filter assembly to an exhaust hood.

Abstract: A getter structure including at least one portion of getter material at least one face of which is positioned against at least one portion of gas-permeable material such that said portion of getter material is able to achieve a gaseous absorption and/or adsorption at least by said face through at least said portion of gas-permeable material, and in which the portion of gas-permeable material includes one or more channels made at the level of a face of said portion of gas-permeable material which is in contact with the portion of getter material, where the portion of getter material is able to achieve a gaseous absorption, or a gaseous adsorption, or both a gaseous absorption and a gaseous adsorption, via the channel or channels.

Abstract: An adsorbent canister includes a casing defining a first adsorption chamber, a second adsorption chamber and a diffusion chamber therein, and an adsorbent capable of adsorbing the fuel vapor and filled in the first adsorption chamber and the second adsorption chamber. The first adsorption chamber and the second adsorption chamber communicate with each other via the diffusion chamber. The casing has on a side wall thereof a fuel introducing port configured to introduce fuel vapor into the first adsorption chamber and an air communicating port configured to introduce air into the second adsorption chamber. The diffusion chamber has at least one of a first diffusion chamber and a second diffusion chamber. The first adsorption chamber is positioned above the first adsorption chamber and extends over the entire length of the first adsorption chamber. The second diffusion chamber is positioned below the second adsorption chamber and extends over the entire length of the second adsorption chamber.

Abstract: A method includes using an element which includes a monoblock concrete body with a volume greater than 1 L and a surface porosity greater than 8%, which body includes in the body and/or on a surface thereof a compound having a BET specific surface greater than 100 m2/g, and which element does not include a photocatalytic agent, to absorb from the atmosphere a gas selected from the group consisting of nitrogen oxides, carbon oxides, sulphur oxides, and ozone, or a volatile organic compound.

Abstract: An integrated device for removal of both liquid-containing droplets and pollutants from a gas stream includes a plurality of passageways and a plurality of exposed surface portions, different ones of the surface portions disposed along different ones of the plurality of passageways. The plurality of passageways include an inlet and an outlet for the flow of a gas stream therethrough, wherein each passageway includes at least one segment configured to perturb the flow of at least a portion of the gas stream between the inlet and the outlet. Such gas perturbation enhances gas stream contact with the exposed surfaces. Portions of the exposed surfaces comprise a sorbent-polymer-composite material adapted for adsorption of elemental and oxidized mercury vapor. The exposed surfaces are disposed to enhance the removal of liquid-containing droplets and elemental and oxidized mercury vapor.

Abstract: This invention relates to an adsorbent cartridge assembly having at least one end cap, and systems related thereto, for removing gaseous contaminants from the air or other gases.

Abstract: The group of inventions relates to the technology for purifying liquids and gases by removal of contaminating multicomponent ingredients. The device comprises a housing comprising at least one hollow spiral element with a conical shape, with separation openings being formed in at least some of the turns of the spiral element, each of the openings communicating with a corresponding separation chamber. Arranged opposite the separation opening is a nozzle, which is intended for compensating for the mass and centrifugal moment of the fluid medium. A guide element around which a flow passes is mounted on the wall of the nozzle. The cross-sectional area and the radius of each successive turn is selected from the condition for maintaining an estimated value for the centrifugal moment of the substance to be purified. The method consists in that a flow of medium to be purified is spun by the above-described device. Contaminating components in each turn are positioned by coaxial layers.

Abstract: A duct filter bag used in connection with a heating and air conditioning vent, the duct filter bag including a filter body constructed of a material that is air permeable yet catches particles exiting the vent, the filter body having a perimeter; an attachment assembly connected to the filter body; where the filter body is extendable outward relative to the attachment assembly to define a filter volume; the attachment assembly being adapted to attach the filter body such that the filter volume is in registry with the vent.

Abstract: An exterior duct filter retainer used in connection with a heating and air conditioning vent, the duct filter retainer including a filter body constructed of a material that is air permeable yet catches particles exiting the vent, the filter body having a an attachment assembly connected to the filter body; the attachment assembly being adapted to attach the filter body such that the filter is against and/or in registry with the vent. The filter body can be flat, and the attachment assembly can use a variety of means to attach the filter body in registry with the vent.

Abstract: An external oil coalescing adapter fitted to a desiccant breather with an adapter housing with a coalescing chamber for receiving an air flow containing oil; oil coalescing media contained within the coalescing chamber for coalescing oil contained in the air flow; a first end cap for attaching to one end of the housing, the first end cap also attachable to a breather; and a second end cap for attaching to the opposite end of the housing from the first end cap, the second end cap attachable to a system.

Abstract: An air cleaning system (10) is disclosed comprising a fire protection system. The fire protection system comprises at least one of (i) a spark arrestor (21), (ii) a particle feeder (31), (iii) a fire detection system; and (iv) a fire extinguishing system. A preferred spark arrestor comprises a particle pre-separator (22). A preferred particle pre-separator has a core-and-vane assembly that prevents air traveling through the particle pre-separator from traveling in a straight line.

Abstract: An adsorbent construction for use in an electronic enclosure is disclosed. In certain embodiments the adsorbent construction comprises an adsorbent material and a polymeric material substantially surrounding the adsorbent material. The polymeric material regulates the flow of water vapor into and out of the adsorbent material. In example implementations one or more openings are present in the polymeric cover, the openings permitting flow of water vapor through the polymeric cover. A filter material can cover the opening in the polymeric cover. The adsorbent material can comprise, for example, activated carbon, silica gel, or a combination thereof.

Abstract: A filtration device 8 for filtering air used with a fuel vapor recovery system 100 may comprise a housing comprising an upper end 10 having at least one air inlet 18 and a lower end 12 having at least one air outlet 26, a first passageway 32 in fluid communication with the air inlet 18 and configured to increase the velocity of the air through the first passageway 32 compared to the air inlet 18, a collection cavity 34 in fluid communication the first passageway 32 and configured to reduce the velocity and abruptly change the direction of the air through the collection cavity 34 compared to the first passageway 32, a filter cavity 14 in fluid communication with the collection cavity 34 comprising a filtering media 16, and a clean air cavity 40 in fluid communication with the filter cavity 14 and the air outlet 26 of the housing.

Abstract: A canister includes a first fuel vapor adsorption device and a second fuel vapor adsorption device. The second fuel vapor adsorption device can adsorb a part of fuel vapor that still remains in a gas after desorption by the first fuel vapor adsorption device. The second fuel vapor adsorption device includes a first passage containing a fuel vapor adsorption material and a second passage containing no fuel vapor adsorption material. The first passage and the second passage allow the gas to flow therethrough. A gas introduction device allows the fuel vapor to flow from the second passage into the first passage.

Abstract: It is an object to provide a vent filer that can reduce contaminants diffusing through the vent filter into the inside of a housing, and has high diffusion efficiency and low pressure loss. The vent filter has an adhesive layer 1 having a through-hole 1a at least in one area; a flow path member 2 provided with a flow path 2a in communication with the through-hole 1a; and an air-permeable membrane 3 covering the flow path member 2 and part of the adhesive layer 1, wherein the peripheral portion 3a of the air-permeable membrane 3 is fixed to the adhesive layer 1 and the flow path member 2 is held within a hollow portion formed between the adhesive layer 1 and the air-permeable membrane 3.

Abstract: In a vaporized fuel treatment apparatus a partition wall member is housed in an inner cap, and a gas-liquid separation chamber and a fuel adsorption chamber are defined on either side of the partition wall member. Further, a partition plate is provided on an open end of the inner cap. Wall portions are formed respectively on the partition wall member and the partition plate, and a conduction passage is defined in the fuel adsorption chamber by these wall portions. As a result, air containing vaporized fuel can be guided to every corner of the fuel adsorption chamber. Further, a through hole is provided in a central portion of the partition wall member, and therefore liquid fuel is prevented from flowing into the fuel adsorption chamber even when a fuel tank is tilted.

Abstract: An adsorbent canister has a housing defining an adsorption chamber therein, an adsorbent filled in the adsorption chamber, and a honeycomb core. The honeycomb core is made from a material having a higher thermal conductivity than the adsorbent, defines therein a plurality of cells passing through the honeycomb core and is disposed in the adsorption chamber. The adsorbent canister can further have a heater for heating the honeycomb core or the honeycomb core can be made from a material, which produce heat when current is applied.

Abstract: Embodiments of the present disclosure provide for collection devices, methods of making collection devices, methods of collecting gases and aerosol particles, and the like.

Abstract: A canister for trapping a fuel vapor vaporized in a fuel tank has a casing defining an adsorption chamber therein, an adsorbent capable of adsorbing the fuel vapor and filled in the adsorption chamber and a flow regulation plate disposed in the casing. The casing has a fuel introducing port configured to introduce the fuel vapor from the fuel tank into the adsorption chamber, and an air communicating port communicating the adsorption chamber with the atmosphere. The air communicating port is formed on a side surface of the casing extending in a direction of gravitational force. The flow regulation plate disposed at an end of the adsorption chamber near the air communicating port and has an opening configured to communicate the adsorption chamber with the air communicating port. The opening is positioned above the air communicating port in the direction of gravitational force.

Abstract: The present invention relates to a method and device for the purpose of filtering particulate laden air exiting a rooftop from a commercial kitchen or other high particulate laden air exhaust. By positioning a filter at a distance from the air exhaust exit in such a manner that the air flow is reflected off the filter a substantial portion of the particulate matter is filtered out of the air without substantially obstructing the flow from the exhaust preventing problems that might be caused from creating back flow in an exhaust system.

Abstract: An adsorbent canister has a housing defining an adsorption chamber therein, an adsorbent filled in the adsorption chamber, and a honeycomb core. The honeycomb core is made from a material having a higher thermal conductivity than the adsorbent, defines therein a plurality of cells passing through the honeycomb core and is disposed in the adsorption chamber. The adsorbent canister can further have a heater for heating the honeycomb core or the honeycomb core can be made from a material, which produce heat when current is applied.

Abstract: An air drier for an air suspension of a vehicle for supplying dry air to the air suspension, includes a housing having inflow and outflow ports formed at first and second ends in an axial direction, first and second filters accommodated in the housing, a desiccant agent supported between the first and second filters, and an air guide member arranged between the first filter and the first end of the housing and including a tubular portion and an annular plate having a plurality of holes, the tubular portion covering the inflow port in the axial direction to form a flow passage guiding fluid from the inflow port to the first filter, wherein the fluid guided from the inflow port flows through the flow passage and the first filter into the desiccant agent and is dried thereby, and the dry air is discharged from the outflow port to the air suspension.

Abstract: One exemplary embodiment can be a vessel. The vessel can include a body, an inlet, and an impermeable impingement plate. The body may include a substantially cylindrical structure orientated substantially horizontally, and first and second heads coupled at opposing ends of the substantially cylindrical structure. Generally, the body forms an interior space, and a lower portion of the body forms a trough having a length and a width. The inlet can communicate with the interior space of the vessel. Typically, the impermeable impingement plate has an impingement surface. The impermeable impingement plate may have a first side and a second side extending substantially the length of the trough. The first and second sides may be substantially parallel and spaced apart across at least a portion of the width of the trough.

Abstract: An energy recycling type dust removing processing system for removing a contaminated material in high temperature contaminated gas and an inertial impact type energy recovery and dust removal apparatus. The energy recycling type dust removing processing system includes: a duct collecting a high temperature contaminated gas including high temperature dust; an energy recovery and inertial impact type dust removal unit recovering energy of the high temperature contaminated gas to convert the high temperature contaminated gas into a middle temperature contaminated gas and removing coarse dust from the high temperature dust through an inertial impact phenomenon; an in-flight adsorption apparatus removing fine dust from the contaminated gas in which the coarse dust is removed; and a micro dust removal apparatus removing micro dust in the contaminated air from which the fine dust is removed by the in-flight adsorption apparatus.

Abstract: A vehicle air handling system includes an air handler, a desiccant assembly and a regeneration mechanism. The air handler has an air inlet configured to receive airflow into the air handler and an air outlet configured to direct the airflow from the air handler to a passenger compartment of a vehicle. The desiccant assembly is installed in a fixed non-movable orientation within the air handler. The desiccant assembly is configured to absorb moisture from the airflow and is disposed between the air inlet and the air outlet. The desiccant assembly includes a first flow path and a second flow path separated from one another such that the airflow passes through the first flow path. The regeneration mechanism is in fluid communication with the second air flow path of the desiccant assembly and is configured to remove moisture from the airflow passing through the desiccant assembly.

Abstract: An adsorbent is described. The adsorbent may include a membrane and an adsorbent material encapsulated within the membrane. An inhalation device is also described. The inhalation device may include a housing and a membrane within the housing. The membrane may encapsulate an adsorbent material. The membrane may be positioned such that airflow through the housing passes across but not through the membrane.

Abstract: The invention relates to an air filter device (1) having a filter housing comprising a filter housing cup (2) and a filter housing cover, in which filter housing at least one filter element (3) is arranged. Pertinent to the invention is that a flow-directing element (7) is provided that is configured in such a manner that it is ensured that the filter element (3) is flowed through uniformly.

Abstract: A hydrocarbon adsorption filter device comprising: a filter housing; at least one filter element with activated carbon arranged in the filter housing; an intake canal, connecting the filter housing with an environment, wherein fresh air is taken in during a flushing operation; and an intake canal housing cover, wherein the intake canal housing cover includes a labyrinthine canal structure having a first end and an opposing second end, wherein the first end is in communication with the intake canal while the second end is in communication with a floor-side opening of the housing.

Abstract: One aspect according to the present invention includes a fuel vapor processing apparatus including an insert. The insert can determine an effective flow passage area of the adsorption material chamber without producing a non-filled region of an adsorption material, through which fuel vapor containing gas flows.

Abstract: A method and an apparatus are provided for deodorizing and disinfecting air and droplets from urinal, toilet bowl, and other receivers and holders of urine and fecal matter. The apparatus comprises a housing (1) having an air inlet (2) and air outlet (3), wherein the housing (1) encloses a droplet removal chamber (4) for removing droplets from airflow; a deodorization and disinfection chamber (5) for removing air contaminants in the airflow; and an delivery unit (6) for airflow generation. Being actively drawn into the apparatus, air contaminants such as odor, bacteria and virus are removed without discharge of contaminated air and causing secondary pollution. The apparatus and method provide odorless and comfortable environment and avoid disease transmission in both public and domestic toilets.

Abstract: A sieve bed including an inlet end, an outlet end, a retainer disposed toward the inlet end and including an interior portion, an exterior portion, a plurality of openings disposed toward the exterior portion, and a passage disposed toward the interior portion, an inlet cap and an inlet port configured to receive a feed stream, wherein the inlet cap includes at least a portion spaced from the retainer thereby defining an inlet chamber in fluid communication with the inlet port and the plurality of openings, an outlet lid disposed toward the outlet end, an exterior wall extending from the inlet cap to the outlet lid, an intermediate wall spaced from the exterior wall and extending from the retainer toward and terminating short of the outlet lid and an interior wall spaced from the intermediate wall and extending from the retainer proximate the passage to at least the outlet lid.

Abstract: A fuel vapor adsorbing device has a casing having an axis and defining a vapor inlet, a vent connected to the outside environment, and a chamber connected fluidically to the inlet and the vent. The adsorbing device also includes a filter material housed in the chamber; a cover wall covering the chamber; and an elastic mechanism and, preferably, a grille, which are integral with the cover wall and cooperate with the filter material.

Abstract: A collection apparatus comprises a nozzle comprising an inlet for receiving at least a portion of a gas stream and an outlet, and at least one sorbent trap having an inlet in fluid communication with the outlet of the nozzle, wherein the sorbent trap comprises one or more collection media configured to collect at least one of a metal, an element, and a halogen present in the portion of the gas stream.

Abstract: A dryer for an air suspension for a vehicle, includes a housing having an inlet port and an outlet port, a desiccant disposed between first and second filters within the housing, and a guide member including a shielding cylinder portion and a plate portion having plural communication holes, wherein the guide member is disposed between the inlet port and the first filter positioned closer to the inlet port, supports the first filter and the desiccant and guides a fluid to the desiccant, the shielding cylinder portion includes an opening and forms a flow passage for guiding the fluid, the fluid is guided to the desiccant from the inlet port via the shielding cylinder portion, and the flow passage and the communication holes, so that the fluid is dried by the desiccant and is then discharged from the dryer as a dry air to the air suspension for the vehicle.

Abstract: Hydrogen sulfide is removed from a hydrogen rich gas stream using adsorbents having a low loss of carbon dioxide adsorption capacity upon sulfur loading including high purity silica gels, titania or highly cross-linked, non-chemically reactive resins. The adsorbents may be used to adsorb both carbon dioxide and hydrogen sulfide, or may be used as a guard bed upstream of a separate carbon dioxide adsorbent.

Abstract: Embodiments of the invention generally include a filter housing having a bagging ring coated to enhance a bag-to-bagging ring seal. In one embodiment, the housing assembly includes a housing having an inlet, an outlet and an access port. A bagging ring is disposed around the access port and includes a material having a property that enhances the bag-to-bagging ring seal. Examples of materials that have a property that enhance the bag-to-bagging ring seal include materials that are attracted to a plastic bag, materials that are tacky, materials that have a static attraction to a plastic bag.

Abstract: One exemplary embodiment can be a vessel. The vessel can include a body, an inlet, and an impermeable impingement plate. The body may include a substantially cylindrical structure orientated substantially horizontally, and first and second heads coupled at opposing ends of the substantially cylindrical structure. Generally, the body forms an interior space, and a lower portion of the body forms a trough having a length and a width. The inlet can communicate with the interior space of the vessel. Typically, the impermeable impingement plate has an impingement surface. The impermeable impingement plate may have a first side and a second side extending substantially the length of the trough. The first and second sides may be substantially parallel and spaced apart across at least a portion of the width of the trough.

Abstract: It is an object to provide a vent filer that can reduce contaminants diffusing through the vent filter into the inside of a housing, and has high diffusion efficiency and low pressure loss. The vent filter has an adhesive layer 1 having a through-hole 1a at least in one area; a flow path member 2 provided with a flow path 2a in communication with the through-hole 1a; and an air-permeable membrane 3 covering the flow path member 2 and part of the adhesive layer 1, wherein the peripheral portion 3a of the air-permeable membrane 3 is fixed to the adhesive layer 1 and the flow path member 2 is held within a hollow portion formed between the adhesive layer 1 and the air-permeable membrane 3.