Abstract: An impact filter suitable for a kitchen exhaust hood is provided with a grease trap to capture grease particles and channel the particles away. The trap can be of different configurations. The filter can be used in various system layouts.

Abstract: An air purifier with bactericidal and odor removal effect is disclosed. The air purifier comprises a fan module; UV light source; and light catalyst, wherein the fan module withdraws external air into the purifier and the UV light source and the light catalyst are provided at the rear section of the fan module so as to receive the external air withdrawing by the fan module, and the UV light source and the light catalyst are configured to form a passage; the radiation of UV light source onto the light catalyst causes the formation of free radicals in air which decompose bacteria, micro dust and suspension within the air, to clean air odor removal and air drying.

Abstract: An air purifier includes a vertically disposed housing provided with a wire gauze filter, electric fans and air filter elements. The electric fans draw outside air around the floor vertically into the bottom air intake port toward the top air output port of the housing so that the flow of air, when passed out of the air output port, flows upwards to a certain elevation and is then diffused and lowered in all directions around the housing. By means of the traction of the flow of air, the pressure difference of the convection of air between the low air pressure and the high air pressure at the bottom and top sides of the housing, high concentration of car waste gas, micro dust particles, hair dust, micro fibers and other harmful industrial odors that fall to the floor due to the effect of gravity or floating nearly above the floor are sucked into the inside of the housing by the low air pressure zone at the open bottom side of the housing and then removed by the filter elements.

Abstract: An exemplary self-cleaning light source module includes a light source assembly, a housing, and a photocatalyst layer. The light source assembly includes a first light emitting component for emitting visible light and a second light emitting component for emitting UV light. The housing encloses the light source assembly therein and has a light permeable portion. The photocatalyst layer is formed on an outer surface of the light permeable portion of the housing.

Abstract: A pollution control device that provides an external air filtration system for pollutants and other undesirable materials. The system includes a pipe which is attached to the external wall of a building and which provides water to each of the filtration units. An air flow chute is associated with the pollution control device and allows incoming air to pass through a replaceable filter and adjacent to an ultraviolet light setup that are located within each air filtration unit. The air being drawn into the system and subsequently filtered is drawn in by a rooftop device that draws air upward through the device and expels it through the top of the air flow chute.

Abstract: A method is disclosed for enhancing condensation and separation in a fluid separator, wherein: —a fluid mixture is accelerated to a transonic or supersonic velocity in a throat section of a flow channel and thereby expanded and cooled such that at least some initially gaseous components become supersaturated and condense; —at least some condensed components are removed from the fluid mixture in the flow channel at a location downstream of the throat section; and —condensation of at least some supersaturated components is enhanced by illuminating the fluid mixture flowing through the flow channel by a radiation source (10), such as an Ultraviolet (UV) light source which excites and/or ionizes and induces mercury, water, aromatic hydrocarbons, carbon dioxide, hydrogen sulphide and/or other components to condense thereby forming condensation nuclei for other supersaturated fluid components.

Abstract: An air purifier with bactericidal and odour removal effect is disclosed. The air purifier comprises a fan module; UV light source; and light catalyst, wherein the fan module withdraws external air into the purifier and the UV light source and the light catalyst are provided at the rear section of the fan module so as to receive the external air withdrawing by the fan module, and the UV light source and the light catalyst are configured to form a passage; the radiation of UV light source onto the light catalyst causes the formation of free radicals in air which decompose bacteria, micro dust and suspension within the air, to clean air odour removal and air drying.

Abstract: A system for treating a medium, such as water, with ultraviolet light is provided. The system can include an ultraviolet treatment chamber that is shaped to reduce reflections of the ultraviolet light within the ultraviolet treatment chamber and/or improve absorption of the ultraviolet light by the medium. Furthermore, the system can add an agent to the medium within the treatment chamber to further treat one or more contaminants that may be present within the medium. Still further, additional treatment, such as filtering the medium with a permeable material can be implemented within the treatment system.

Abstract: A storage compartment comprises an enclosure defining a storage space and an air treatment system in fluid communication with the interior space. The air treatment system includes a light source and a catalyst and configured to treat air without the use of ozone.

Abstract: A system that captures and eliminates indoor pollutants and chemical and biological agents within a HVAC system by breaking down the pollutants and chemical and biological threats into non-hazardous molecules. The surface area created by crystalline titanium dioxide nano-structures results in highly effective elimination rates when catalytic ionization by UV exposure occurs. The catalyst is activated with UVA light.

Abstract: A catalytic system (10) for fluid purification, the system (10) comprising: at least one photon source (2) to substantially break down at least two types of target molecules in the fluid to create short lived intermediates; and a ceramic core (5) including at least one type of micropore to adsorb the short lived intermediates for the propagation reactions and termination reactions of the short lived intermediates.

Abstract: The present invention relates to an air filtration system and a method for making a photocatalytic oxidation substrate by powder coating a photocatalyst onto a metal substrate.

Abstract: An apparatus for providing pollution free air to an individual includes an enclosed or semi-enclosed space or compartment for surround or partially surrounding an individual's head or upper body to separate the individual from polluted air. A filter assembly and fan forcing polluted air through the filter assembly and into the enclosure. The filter assembly includes a first filter for removing relatively large particles such as sand or dust from the polluted air while a second HAPA filter removes airborne allergens before forcing non-polluted air into the enclosed or semi-enclosed space.

Abstract: A multi-chamber air sterilization system including an air inlet, an air test chamber in fluid communication with the air inlet, a mechanical and chemical filtration chamber, an ultraviolet light chamber, a blower and an air exhaust. The system includes a filter sleeve for filtering particulates and chemical agents, and an ultraviolet lamp for killing biological agents.

Abstract: A modular ductwork assembly decontaminates an air stream circulating within an heating, ventilation and air conditioning (HVAC) system. The assembly includes (a) an ionizing module for removing particulates from the air stream, (b) a sterilization module for neutralizing airborne pathogens present in the air stream, (c) an ozone treatment module for neutralizing odoriferous constituents or volatile organic compounds (VOCs) present in the air stream, optionally (d) baffles for slowing and disrupting the flow rate and promoting turbulence in the air stream traveling through the modules and optionally (e) a fan module for directing a treated air stream. Each of the modules is arranged substantially adjacent to at least one of the other modules.

Abstract: A surface cleaning apparatus comprises a dirt inlet, a handle, a cyclonic cleaning unit comprising a plurality of cyclones and at least one dirt collection chamber, each of the plurality of cyclones having an outer wall, an interior, a fluid inlet downstream from the dirt inlet and a fluid outlet, the at least one dirt collection chamber having an outer wall and an interior, wherein the surface cleaning apparatus is constructed such that the interior of the at least one dirt collection chamber is visible from a position exterior to the surface cleaning apparatus and a fluid flow motor. The surface cleaning apparatus may have a filter with a housing that is at least partially transparent.

Abstract: This UV light system for use in a central air handling unit of a heating or air conditioning system includes a UV light source and is adapted for operation on, and receives power from, an approximately 24VAC low voltage power supply for a thermostat of the heating or air conditioning system. In its preferred embodiments it is provided with a mounting system including a bendable “Z” shaped mounting bracket, which bracket can be bent to multiple angles allowing the UV light source to be positioned in numerous ways within the central air handling unit. It is preferably packaged in a cylindrical packing case where the elongate cylindrical emitter portion of the UV light source is aligned with the axis of the case.

Abstract: A portable room air purifier includes a hollow cylindrical air filter disposed within a housing and having an inner surface circumscribing a cylindrical air treatment space and an outer surface. A sorbant material is disposed on the inner surface of the air filter and a germicidal lamp is disposed within the cylindrical air treatment space to emit germicidal light within the space and incident upon the sorbant material on the inner surface of the air filter. A fan is disposed in the housing to draw air from the cylindrical air treatment space through the air filter such that the air enters the filter through the inner surface and exits the filter through the outer surface. The portable room air purifier preferably includes an electrical circuit configured to power the fan and the germicidal lamp when the housing is in an assembled condition, and to deactivate both the fan and the lamp when the housing is disassembled.

Abstract: An indoor air purification system and method of same includes a case which removably attaches to an exhaust of cleaning equipment. An air purification chamber housed within the case includes an intake and exhaust wall and side walls, including a first side wall having an outside and inside surface. The intake and exhaust walls of the chamber are covered by aluminum metal mesh filters with a titanium dioxide coating. An ultraviolet-A blacklight blue is mounted to the inside surface of the first side wall of the chamber and includes an elongated u-shaped lamp for activating the titanium dioxide coating. An ultraviolet-C germicidal light for ultraviolet germicidal irradiation is mounted above the ultraviolet-A blacklight blue within the chamber and includes an elongated u-shaped lamp. A solid state high frequency electronic ballast powers and activates the lamps and converts voltage.

Abstract: A refrigerated appliance is disclosed. The refrigerated appliance comprises an enclosure defining a cooled space and having an outer wall and an inner wall spaced apart from the outer wall to define an air duct. The refrigerated appliance further includes an evaporator disposed at least partially in the air duct and configured to cool air in the air duct, and the evaporator fan is configured to move air from the air duct into the cooled space, and an air treatment system at least partially located in the air duct. A portion of the air passing through the air duct passes through the air treatment system. The air treatment system comprises a filter cartridge or module, a base with a receptacle configured to receive the filter cartridge, and a mounting or coupling mechanism configured to move the filter cartridge into and out of engagement with the base. The mechanism has a release handle such that both the release handle and the cartridge are accessible from the cooled compartment.

Abstract: An air treatment system includes a housing defining a chamber, and an ultraviolet lamp positioned within the chamber. The housing further defines an air inlet at a first end portion of the housing and an air outlet at a second end portion of the housing opposing the first end portion. The chamber provides flow communication between the air inlet and the air outlet. At least one ultraviolet lamp is positioned within the chamber. The at least one ultraviolet lamp is positioned about a first axis and includes a first end and a second end spaced with respect to the first end along the first axis. The at least one ultraviolet lamp is configured for facilitating inactivating contaminants within air channeled through the chamber.

Abstract: The invention relates to a device for disinfecting liquids by means of ultraviolet radiation in a continuous flow method, with a reactor chamber through which flow can take place and in which a number of UV radiator units is arranged, the reactor chamber being provided with a wall, which is open at two end sides, and locally surrounded by at least one pre-chamber. Advantageous flow conditions are achieved if the at least one pre-chamber is welded to the wall at a distance from the end side so that an annular intermediate space with an internal width (r) is formed between a side of the per-chamber and the wall, and an essentially axisymmetric annular gap (d) is formed between the end side and the pre-chamber.

Abstract: A device for filtering nanoparticulate matter below 300 nm in size from ambient air within a defined enclosed space comprises at least one filter medium containing at least one filter material, and a fan or blower, which blows or draws the air through the filter medium does so with sufficiently low air velocity in the filter medium that the air has a long residence time in the filter medium, during which time adhesive encounters between nanoparticulate matter and the solid phase of the filter material are highly probable. This air velocity is also being sufficiently low to ensure that, once adhesion has taken place, kinetic de-adhesion by the air flow is highly improbable. Such a device allows to keep the nanoparticle count inside the enclosed space kept below 5000/cc, equivalent to ‘natural woodland’, even though external levels may exceeded 200,000/cc: the removal of nanoparticles by cleaning making this <2.5% the external count.

Abstract: A system and method for controlling operation of an ultraviolet air treatment device including an ultraviolet lamp positioned to treat air within an air handling system that operates in either an on state or an off state. The method includes activating the ultraviolet lamp, and determining the operational state of the air handling system. The ultraviolet lamp is deactivated upon expiration of a predetermined time period during which the air handling system remains in the off state. The predetermined time period is preferably 30-60 minutes, preferably 40 minutes for residential applications.

Abstract: An air-pressure-control system, the system comprising a system inlet, a system outlet, and a variable-speed fan configured to operate at a speed. A motor controller in communication with the fan is configured to control the speed of the fan. A differential-pressure transducer configured to monitor an air pressure at the system inlet and an air pressure at the system outlet. A closed-loop pressure controller in communication with the motor controller and differential-pressure transducer, wherein the pressure controller is configured to vary the speed of the fan based on the pressure differential between the inlet and outlet of the system, thereby controlling a pressure within a space. An ultraviolet kill chamber may be disposed between the inlet and outlet to expose airborne particulate to UV radiation. The system may also have a filter located within an air-flow path between the system inlet and system outlet.

Abstract: An air purifying system for a vacuum cleaner. An airflow reduction chamber is insertable along an airflow passage of the vacuum cleaner so that air pumped by the vacuum cleaner passes in the airflow reduction chamber prior to being released out in the open. The airflow chamber has an air inlet and an air outlet and an inner wall extending therebetween. An air deflector plate is positioned in front of one of the air inlet and the air outlet inside the airflow reduction chamber. A UV lamp of a type emitting radiations killing germs and bacteria extends inside the airflow reduction chamber. At least a portion of the inner wall of the air chamber at a level of the UV lamp has a surface reflective to UV radiations emitted by the UV lamp. A control circuit controls operation of the UV lamp.

Abstract: A heating, ventilating and air conditioning (HVAC) system, comprising a heat exchanger plenum having a surface located therein that is susceptible to degradation upon exposure to light, and a light bulb located within the plenum. In one embodiment, the light bulb has a side directed toward the surface and a light-absorptive barrier coupled to the side. The light-absorptive barrier is configured to reduce direct light transmission from the light bulb to the surface to thereby inhibit degradation of the surface. The invention further provides an HVAC system comprising a light bulb configured to emit photonic energy, and an absorptive barrier coupled to at least a portion of an outside of the bulb. The absorptive barrier is configured to substantially reduce transmission of the emitted photonic energy beyond the portion of the bulb.

Abstract: A vaporizing apparatus for generating a process gas from a liquid material includes a vaporizing container defining a vaporizing space of the vaporizing apparatus; an injector connected to the vaporizing container to spray the liquid material in an atomized state into the vaporizing space; and a heater attached to the vaporizing container to heat the liquid material sprayed in the vaporizing space. The vaporizing apparatus further includes a gas delivery passage connected to the vaporizing container to output from the vaporizing space a generation gas generated from the liquid material; a filter disposed inside the gas delivery passage or between the gas delivery passage and the vaporizing space to trap mist contained in the generation gas; and an infrared irradiation mechanism configured to irradiate the filter with infrared rays.

Abstract: A ventilation system has a filter apparatus which comprises a porous filter media 10 arranged to trap micro-organisms contained in a fluid flow along a duct 14 of the apparatus, and a lamp 13 for irradiating the filter media 10 with ultraviolet light, the filter media 10 being formed of a fluroplastics material which is substantially transparent to the ultraviolet light so that micro-organisms trapped inside the pores of the filter are irradiated and killed by the ultraviolet light. The ventilation system alternatively or additionally comprises a filter apparatus which comprises a porous filter media 40 formed of an electrically conductive material arranged to trap micro-organisms contained in a fluid flow along a duct 42 of the apparatus, and a coil 25 for irradiating the filter media 40 with electromagnetic radiation so as to heat the filter media 45 and thereby kill any micro-organisms trapped by the filter media 40.

Abstract: A deputation process and corresponding apparatus for purification of the air of a closed environment characterized by indoor pollution, in which, in order to reduce the pollution, a water tank is provided that contains a multiplicity of active biomasses designed to absorb and metabolize the pollutant substances that are contained in the water and come from the air of the closed environment, and elements of water-air contact, designed precisely to transfer the pollutant substances from the closed environment into the water within the tank.

Abstract: Ultraviolet radiation is used to disinfect air (105) in a flow tube (110), where the flow tube (110) includes total internal reflecting features (120) on a portion of its external surface and said ultraviolet radiation propagates through a portion of the flow tube via total internal reflection.

Abstract: An apparatus for maintaining a desired air pressure inside a home includes a differential pressure switch/gage having a first port and a second port. The first port is adaptable for sensing a first pressure inside the home; the second port is adaptable for sensing a second pressure outside the home. The differential pressure switch/gage is adaptable for producing a signal in response to a difference between the first pressure and the second pressure. A motorized damper is in signal communication with the differential pressure switch/gage and is operable to control entry of air into the home in response to the signal. A method of maintaining a desired air pressure inside a home comprises sensing a first pressure inside the home, sensing a second pressure outside the home, and introducing air into the home through a controlled opening if said second pressure exceeds said first pressure by a specified amount.

Abstract: Described is an air and surface purifying device having a purifying cell structured for maximizing the realized photocatalytic reaction at a photocatalytic surface without using an additional ultraviolet bulb. The purifying cell positions at least three photocatalytic surfaces about a single ultraviolet bulb such that the photocatalytic surfaces substantially encompass the ultraviolet bulb and are saturated by ultraviolet light radiating from the ultraviolet bulb. Because the photocatalytic surfaces are saturated, the potential photocatalytic reaction at the photocatalytic surfaces is fully realized. Stated differently, the realized photocatalytic reaction is maximized. Because the purifying cell maximizes the realized photocatalytic reaction, the purifying cell maximizes the purifying capacity of the photocatalytic surface and, thus, the purifying cell itself.

Abstract: The present invention relates to a system for removal of airborne contaminants in a confined space comprising a primary reaction chamber which chamber comprises at least one ultraviolet light tube for the generation of ozone, in which chamber air coming from the confined space is treated with a combination of UV radiation and ozone. It is an object of the invention to provide a system for removal of airborne pollutants in confined spaces, such as a livestock stable. A further object of the invention is to overcome the problem of dust accumulation on the ultraviolet light emitting lamp and production of nitrogen containing toxic gases.

Abstract: An air filtration device for suppressing biological pollutants for closed environments, including at least one enclosure with at least one air inlet, at which at least one perforated conducting grille is located, that has a present negative electrical potential adapted to emit electrons when air flows, so as to give negative electric charge to particles to which microorganisms adhere, at least one air passage duct being formed between at least one plate having predefined positive potential for collecting negatively charged particles to which microorganisms adhere, at least one deflector plate having a negative potential adapted to divert the particles to which microorganisms adhere, an electrical field being generated between the collector plate and the deflector plate, facing each other, the field to divert and precipitate the particles to which the microorganism adhere onto the collector plate, and an inactivator for inactivation of the microorganisms provided and at least one filtered air outlet.

Abstract: An air ventilation system, comprising an air inlet for admitting contaminated air into the ventilation system, an air outlet for discharging decontaminated air from the ventilation, and an ultra-violet light source disposed therebetween. The ventilation system has a filter disposed upstream of the ultra-violet light source. The filter has a grease particle separator with at least two layers of expanded metal associated therewith. Each has a predetermined number of apertures forming a reticulum. A cartridge filter may be provided for each grease particle separator and disposed upstream thereof. Each cartridge filter and associated grease particle separator preferably forms an integral filtering unit and may be placed at any location of the system.

Abstract: A fluid purification device is provided, which comprises a chamber having an inlet and an outlet, a fluid mover, such as a fan, which causes fluid to pass through the chamber from the inlet towards the outlet and four elongate UV-C light sources in an arrangement such that fluid passes along their length and such that each light source forms an elongate edge of a square prism. The volume of the chamber and the speed of fluid movement as caused by the fluid mover are such that the fluid has a residence time in the chamber of greater than 1.0 seconds. The device may in particular be used to purify air.

Abstract: A method is disclosed for enhancing condensation and separation in a fluid separator, wherein: —a fluid mixture is accelerated to a transonic or supersonic velocity in a throat section of a flow channel and thereby expanded and cooled such that at least some initially gaseous components become supersaturated and condense; —at least some condensed components are removed from the fluid mixture in the flow channel at a location downstream of the throat section; and —condensation of at least some supersaturated components is enhanced by illuminating the fluid mixture flowing through the flow channel by a radiation source (10), such as an Ultraviolet (UV) light source which excites and/or ionizes and induces mercury, water, aromatic hydrocarbons, carbon dioxide, hydrogen sulphide and/or other components to condense thereby forming condensation nuclei for other supersaturated fluid components.

Abstract: An air purifier for industrial plants has an ultraviolet (UV) cleaner. The UV cleaner has a duct casing, multiple UV generators and an air pump. The duct casing has a cavity defined in the duct casing, an air inlet communicating with the cavity and an air outlet communicating with the cavity. The UV generators are mounted in the cavity in the duct casing and generate UV when in operation. The air pump is connected to the air outlet and generates an outward air suction force through the air outlet. The air purifier operates without any filtering elements and has an excellent filtering rate.

Abstract: A multi-chamber air sterilization system including an air inlet, an air test chamber in fluid communication with the air inlet, a mechanical and chemical filtration chamber, an ultraviolet light chamber, a blower and an air exhaust. The system includes a filter sleeve for filtering particulates and chemical agents, and an ultraviolet lamp for killing biological agents.

Abstract: A surface light emitting device utilizes special features of a back light, and emits ultraviolet light. The surface light emitting device also functions as a filter that allows the passage of a fluid. The surface emitting device includes a light source; and a light guide plate with the light source disposed on a side surface thereof, wherein at least one of the front surface and rear surface of the light guide plate is a light emitting surface for emitting light from the light source. Surfaces other than the light emitting surface of the light guide plate and the side surface are formed as light shielding surfaces. The emitted light has a peak wavelength of 388 nm or less. The surface emitting device can be one in which the light guide plate has a plurality of through-holes, and the surface in which the through-holes are formed is a light emitting surface.

Abstract: An air filtration unit for use in a work environment includes a housing disposed with an air filtration system and light source. The housing includes a handle and corner caps to prevent damage and provide stability. The air filtration system draws air into the housing, via a blower, through a first and second inlet gate, the air is at least partially filtered by a first and second filter assembly, which provide a two stage filtering, and then the at least partially filtered air is blown through an exhaust conduit back out into the work environment.

Abstract: An air treatment system includes a housing defining a chamber, and an ultraviolet lamp positioned within the chamber. The housing further defines an air inlet at a first end portion of the housing and an air outlet at a second end portion of the housing opposing the first end portion. The chamber provides flow communication between the air inlet and the air outlet. At least one ultraviolet lamp is positioned within the chamber. The at least one ultraviolet lamp is positioned about a first axis and includes a first end and a second end spaced with respect to the first end along the first axis. The at least one ultraviolet lamp is configured for facilitating inactivating contaminants within air channeled through the chamber.

Abstract: A photo-electronic air purifying disinfector firstly filters out airborne impurities using a washable filter screen. It then utilizes an activated carbon filter to filter out airborne bacteria and germs. The bacteria and germs which are capable of passing through the activated carbon filter are then eliminated by extreme-UV light emitted by extreme-UV light tubes. It also utilizes a negative ion generator to boost the level of anions in the air before being discharged. These two modes operate in the following manner: the first mode involves cathodic high-voltage output that is discharged via a carbonized fibre. The ionized air is then expelled by a fan. The second mode eliminates bacteria, germs and mould from air as it passes extreme-UV light tubes by exposure to extreme-UV light emitted by these extreme-UV light tubes.

Abstract: A cabinet-shaped AIR FILTER includes an air inlet in a lower casing, an air outlet in an upper casing, an air quality measurement and power control device, a fan behind the air inlet, a housing for enclosing the fan and having two sidewalls formed with the lower casing, the housing including a front air intake of streamline section, an upper air exit of rectangular section, and a board extended forward from a top of the air exit to a joining side of the upper and lower casings, one or more ultraviolet lamps on the top of the air exit, and a deodorant and dust filter in the upper casing. The fan can automatically operate in one of different stages in response to different levels of air quality measured by the air quality measurement and power control device.

Abstract: An air purifier is disclosed having an electrostatic chamber and a germicidal chamber, wherein the two chambers are distinct and there is no air flow communication between the electrostatic and germicidal chambers.

Abstract: A sterilization apparatus (200) comprises a robot (201), at least one germicidal energy source (202), and at least one motive capability (203). The sterilization apparatus may optionally further comprise numerous additional components, including a filtration unit (204), at least one power source (209), a power connector (210), an environmental sampling device (211), at least one sensor (212), a control system (213), an audio output device (214), a data transmitter (215), a global positioning satellite (GPS) receiver (216), a radio frequency identification (RFID) tag (217), a vacuum device (218), a floor washing device (219), an activator (220), a waterproof housing (221), and/or a padded housing (222).

Abstract: An air purifier for industry plants has an ultraviolet (UV) cleaner. The UV cleaner has a duct casing, multiple UV generators and an air pump. The duct casing has a cavity defined in the duct casing, an air inlet communicating with the cavity and an air outlet communicating with the cavity. The UV generators are mounted in the cavity in the duct casing and generate UV when operating. The air pump is connected to the air outlet and generating an outward air suction force through the air outlet. The air purifier operates without any filtering elements having a low filtering rate and air cleaning agents smelling and probably endangering people and ambient environment.

Abstract: An air purification apparatus and an illuminating apparatus which provide an eye protecting table lamp that emits gentle light and has an air purification function. The eye protecting table lamp comprises a lamp body unit, a lamp base unit, a focus lamp unit and an air purification unit. The focus lamp unit comprises an illuminant, a cambered reflecting mirror and a light collector. The illuminant has at least one environmentally protective and energy economized LED with minimal heat emission and a long service life. The cambered reflecting mirror is arranged at one side of the illuminant. The light collector is arranged at the side opposite to the reflecting mirror of the illuminant. The air purification unit comprises an air inlet, an extreme ultraviolet emitting device, an air exhaust device, a negative ion generating device and an air outlet.

Abstract: Ventilating and air purifying device including a case having a blower therein provided to a ceiling or a wall, a first flow passage provided between the blower and a room for making an outdoor, the blower, and the room in communication, a second flow passage for making the room, an inside of the case, and the outdoor in communication, and a damper in the case for isolating the first flow passage from the second flow passage so that room air is discharged to the outdoor and the room air is guided to the blower, or making the first flow passage and the second flow passage in communication so that the room air introduced into the second flow passage is guided to the blower, thereby ventilating and purifying the room air.