1040 results about "HEPA" patented technology

A vacuum cleaner includes a first housing defining a cyclonic airflow chamber and a second housing defining a main suction opening that is in communication with an inlet of the cyclonic chamber. A suction source has a suction airstream inlet in communication with an outlet of the cyclonic chamber, and establishes a suction airstream that enters said main suction opening, passes through said cyclonic chamber, and passes to an outlet of said suction source. A substantial portion of particulates entrained in the suction airstream are separated therefrom when said suction airstream moves in a cyclonic fashion through the cyclonic chamber. A main filter assembly, preferably including filter medium comprising polytetrafluoroethylene (PTFE), is located in the cyclonic chamber so that a suction airstream moving from the main suction opening to the inlet of said suction source by way of the cyclonic airflow chamber passes through the filter medium thereof after said airstream moves in a cyclonic fashion within the cyclonic airflow chamber to remove residual particulates from the suction airstream before it leaves the cyclonic chamber. A HEPA filter can be provided to filter the suction airstream exhausted through the outlet of the suction source prior to the airstream being discharged from the vacuum.

A high efficiency filtration medium comprised of a nonwoven filter web of electret charged fibers of a nonconductive thermoplastic resin having a resistivity greater than 1014 ohm-cm, preferably polypropylene. The nonwoven filter web has a basis weight (BW) of less than 60 grams/m2, an effective fiber diameter (EFD) of less than 5 microns and a penetration (PEN) of less than 0.03%, wherein the ratio); BW/(EFD.PEN) is greater than 200. The invention filter medium can be easily used in applications requiring HEPA performance at relatively low pressure drops.

There is provided a vacuum cleaner filer bag including at least two sidewalls which sidewalls are joined by seams. At least one first sidewall comprises a film laminate of a heat sealable film layer and a film support layer. At least one second sidewall comprises a filter laminate comprising at least a synthetic fiber filter layer and synthetic fiber support layer where the at least one first sidewall is joined to adjacent sidewalls by thermal seams. The filter layer is preferably a high efficiency microfiber filter media which provides HEPA level performance for the vacuum cleaner bag.

A portable, variable speed cabin air purifier (10) operates independently of a vehicle HVAC system and is constructed as an armrest or console (114) that can be placed on any passenger seat and held in place by the seat belt. The air purifier (10) may also be strapped to the floor of a van or SUV, or be positioned in the trunk (100) of a sedan with ducting (104, 108) installed into the vehicle cabin. A 12 volt DC blower (48) can be connected to the cigarette lighter outlet (62) or permanently wired in. Three to five replaceable packed bed filter media packets (70-76), a HEPA filter (78) and a carbon impregnated filter (80) may be installed. The filter media packets (70-76) comprise filter media envelopes (86) of a non-woven, gross particulate filter material packed with other filter media (88), including desiccants, sorbents, chemisorbents, pelletized and granular carbon particles, and catalysts, and are placed between grates (82, 84) and installed in a selected sequence.

A vacuum collector is provided comprising a suction hose, a first drum with a cover having a cylindrical head capable of generating powerful, small-diameter cyclones, a second drum capable of generating large-diameter cyclones, and a stack of three modules containing vacuum-producing motors atop a HEPA filter atop primary filters. The suction hose is connected to the inlet of the small-diameter cyclone-generating head on the cover of the first drum. The stack of modules containing motors, HEPA filter, and primary filters is mounted on the second drum. The two cyclonic drums communicate through a flexible vacuum hose. When the vacuum-producing motors pull air from the interior of the vacuum collector, the suction hose sucks atmospheric air mixed with contaminants from a surface into the head, which spins the contaminant-laden air-stream into a powerful, small-diameter cyclone. As a result of cyclonic action, the contaminant laden air-stream spirals to the bottom of the first drum, deposits most of its contaminants, reverses course, exits the drum, and enters the second drum, where it spins into a large-diameter cyclone, deposits more contaminants, passes through the primary and HEPA filters, and exhausts via the vacuum-producing motors. Collectors comprising more than two communicating cyclonic drums for tailored environmental remediation are also described.

An air conditioner and filtering unit produces a positive or negative pressure to create an isolation space. A common air intake plenum has first and second inlets for admitting return air from the space or outside air which may be from a building main A/C system supply. Sanitized, cleaned and conditioned air is returned to the conditioned space; and condenser air is exhausted outside the conditioned space. The air intake plenum may be common to both the condenser air flow and to the evaporator air flow. A HEPA filter cleans the air suppled to both the condenser and the evaporator. A slide damper or other arrangement selectively opens and closes air flow through the first and second air inlets into the common intake plenum. This permits creation of overpressure, underpressure, or an intermediate pressure in the conditioned space. All air supplied to the room and all air exhausted from the room is cleaned and sanitized. The unit is self-contained and portable.

The invention discloses an electronic nose for detecting indoor air quality. The electronic nose mainly comprises a nose frame, a shell, a suction fan, HEPA (High Efficiency Particulate Air) filter paper, a nasal cavity, a gas sensor array and a processing circuit integration module thereof, a DSP (digital signal processor), a human-computer interaction interface, a harmful gas absorption and purification device and the like. The electronic nose is characterized in that indoor air to be detected is sucked into the nasal cavity by the suction fan through the HEPA filter paper to perform a full reaction with the gas sensor array; the measurement and identification of harmful gases in the air are completed inside the nasal cavity; then the harmful gas absorption and purification device is used for absorbing and purifying harmful gases with high concentration. The electronic nose has the characteristics of small size, anti-interference, quickness, accuracy, secondary pollution prevention and the like, and is suitable for detecting the harmful gases in the indoor air.

A modular recycling cleaning system comprising in combination: a pressure washing and control module, a vacuum motor assembly module, a reservoir module, an air/liquid separator module, a flexible hose system, a control system and a cleaning head, capable of being easily configured so as to function as any one of: a straight through pressure washer with cleaning liquid supplied from an external source; a straight through pressure washer with cleaning liquid supplied internally from an integral water reservoir; a recycling pressure washer with cleaning liquid being supplied and reused from an integral cleaning liquid reservoir replenished with cleaning liquid by means of a vacuum recovery system; a straight through pressure washer with recovery of contaminated cleaning liquid but without reuse; a conventional wet vacuum cleaning system or a conventional dry vacuum cleaning system. The appliance being capable of further configuration as a shampooing machine. Further preferred embodiments of the invention include the possible integration of a vane separator and/or a HEPA filter on the vacuum system exhaust; a coacting switch and control for the pressure pump and the vacuum recovery system such that maximum electric current draw remains below a threshold; IPX5 water resistance of the system; various filtering arrangements for both the air and the liquid drawn into the system and a compact coaxial hose set connecting the cleaner body to the hand piece.

A glove box for handling harmful material is formed to be lightweight and modular in design, allowing for use in the field and various remote locations where a full laboratory is not available. The tank portion of the glove box is formed of a rigid, lightweight plastic and includes a number of standard-sized passageways for connecting other components (intake filter, exhaust filter, input/output containers, gasketed gloves, etc), allowing for modularity in its configuration. The top portion of the glove box may include a transparent window for viewing the material within the glove box. Filter components utilize HEPA filter elements and a separate, portable power supply is used to control a vacuum fan included in an exhaust filter. The power supply can also be used to perform diagnostic tests on the glove and may include a battery back-up.

A dual filtration lateral flow containment enclosure is described wherein an air evacuation system is used to provide negative airflow between an upstream filtration system and a downstream filtration system. The enclosure may be arranged such that there is no unfiltered venting between the environment and the interior of the enclosure if so desired. Furthermore, the filtration systems are arranged for the insertion of multiple types of filters, for example, HEPA filters, chemical filters, biological filters and the like for specific removal of air-borne materials from the air flow.

A large capacity HEPA filter is produced having a layered filter medium unitarily formed by an upstream non-woven fabric, which can remove 70 to 90% of 0.3 μm particles, and a downstream non-woven fabric, which can remove 99.9% of 0.3 μm particles or more. The layered filter medium is shaped as a mini pleat shape in a thickness direction and an entire shape in the thickness direction is a plurality of continuous Vs. Also, a dust collecting device having such a large capacity HEPA filter is produced and an air intake device for a gas turbine is provided with such a dust collecting device.

An air purifier provides various air purification functions relating to various environmental conditions by increasing a purification function relative to specific contaminants through replacement of a filter based on the environment to be purified. The air purifier includes a main body of a structure allowing air to pass therethrough. A replaceable filter is received into the main body and is replaceable on a basis of the environmental properties of a space to be purified, removing contaminants in the air passing through the main body. Further, the air purifier includes a dust collecting unit to charge dust particles electrically and to collect the dust particles by electrostatic attraction. In addition, a metal filter functions to collect the dust particles charged in the dust collecting unit, and a HEPA filter is used to collect micro-contaminants. The metal filter is positioned in front of the HEPA filter.

A controlled atmosphere incubator having an interior chamber adapted to be heated and humidified. An easily accessed blower is located within the gaseous environment of the incubator chamber and includes a HEPA filter and VOC filter readily replaceable by the user from within the chamber.

Extracts prepared from red and high-pigment beetroots (Beta vulgaris L.) with a solvent, such as a water-containing solvent, possess antioxidant activity as demonstrated by a panel of assays. These extracts also have an ability to induce quinone reductase in Murine hepatoma cell (Hepa 1c1c7) cultured in vitro. Fractions purified from the active extracts also possess antioxidant activity and retain quinone reductase-inducing activity in the Hepa 1c1c7 cell line. The active extracts, purified by column, thin layer, and high-performance liquid chromatographic techniques, include betalains. A method of extracting a betalain includes steps of freeze-drying a source containing the betalain; grinding the freeze-dried source; and extracting the betalain from the ground source with the solvent. Additionally, the betalain extract can be isolated betalain components, such as by chromatography.

The invention discloses a wet and dry dual-purpose sewage tank assembly of a water machine. The wet and dry dual-purpose sewage tank assembly comprises a sewage tank body, a tank cover assembly, a filtering assembly, a floater assembly and a filtering HEPA; a sewage inlet pipe is arranged at the bottom of the sewage tank body; the filtering assembly is arranged in the sewage tank body and connected to the sewage inlet pipe in a sleeving mode; the tank cover assembly is installed on the sewage tank body; the floater assembly is installed on the lower end face of the tank cover assembly and arranged in the sewage tank body; and the filtering HEPA is installed on the upper end face of the tank cover assembly. The wet and dry dual-purpose sewage tank assembly has the beneficial effects that solid garbage in the sewage tank body can be conveniently taken out through the filtering assembly, so that an operator does not need to separately and manually separate the solid-liquid garbage in thesewage tank body, and the labor intensity is reduced; dry garbage is prevented from entering the dust collector host and the use of the dust collector host is not affected, and the safety and reliability are high; and the assembly is convenient to mount and dismount.