Patent application number | Description | Published |
20090185966 | PREPARATION AND MANUFACTURE OF AN OVERLAYER FOR DEACTIVATION RESISTANT PHOTOCATALYSTS - A photocatalyst system for volatile organic compounds with two parts that include a photocatalyst layer on a substrate and a porous overlayer. The photocatalyst layer is reactive with volatile organic compounds when UV light is projected on it. The overlayer is situated on the photocatalyst layer. The overlayer is UV transparent and has an interconnected pore network that allows contaminated air to pass through the overlayer. The size and the shape of the interconnected pores acts to selectively exclude certain contaminants that can deactivate the photocatalyst. | 07-23-2009 |
20090246091 | AIR PURIFICATION SYSTEM - An air purification system that comprises a substrate, and at least one layer of photocatalysts. The at least one layer of photocatalysts further comprise a plurality of metal clusters. | 10-01-2009 |
20090288941 | PHOTOCATALYTIC AIR PURIFIER FOR A FAN COIL UNIT - A photocatalytic air purifier is disclosed. The photocatalytic purifier includes filter structures coated with a catalytic material such as titanium dioxide. One or more UV lamps are interposed between the filter structures. The catalytic layer reacts with airborne VOCs and bioaerosols when activated by the UV lamps to thereby oxidize the VOCs and destroy the bioaerosols. The photocatalytic air purifier does not need to be replaced or regenerated after a period of continuous usage. The photocatalytic purifier of the present invention substantially eliminates odors, VOCs, and bioaerosols from air directed through the fan coil. The photocatalytic air purifier includes a control system that optimizes operating costs. Because of these features, service, maintenance, and filter replacement are reduced to a minimum. At the same time, the well being of persons living in the space conditioned by the photocatalytic air purifier is improved. | 11-26-2009 |
20100172793 | METHOD AND SYSTEM FOR USING AN OZONE GENERATING DEVICE FOR AIR PURIFICATION - An air purification system for a heating, ventilation, and air conditioning (HVAC) system includes an ozone generating device that is used to introduce ozone into an air stream flowing through the ozone generating device. The ozone is used to remove contaminants, including volatile organic compounds (VOCs), from the air stream. The purification system includes sensors in various locations within the HVAC system to measure a concentration of constituents in the air. In some embodiments, the constituents may include ozone and VOCs, such as toluene, butene, and propanal. To control an amount of ozone generated, the purification system controls an amount of electrical power to the ozone generating device. To control a concentration of ozone generated, the purification system controls a flow rate of air through the ozone generating device. | 07-08-2010 |
20100196223 | PHOTOCATALYST PROTECTION - A gas treatment system for treating a gas stream containing contaminants includes first and second gas treatment members in fluid communication with each other. Each of the first and second gas treatment members is selectively controllable between an on and an off condition. A third gas treatment member is in fluid communication with the first and second gas treatment members, and the third gas treatment member selectively retains or releases the contaminants based upon the on or off condition of at least one of the first or second gas treatment members. | 08-05-2010 |
20100254868 | PURIFICATION OF A FLUID USING OZONE WITH AN ADSORBENT AND/OR A PARTICLE FILTER - A system and method ( | 10-07-2010 |
20110002815 | FLUID PURIFIER WITH NON-LAMINAR FLOW STRUCTURE - The substrate cell surfaces of a catalytic air purifier are so structured as to disrupt the occurrence of laminar flow along the flow path of the fluid passing therethrough. A plurality of substrates are connected in serial flow but axially offset relationship to obtain improved performance. Also, the dimensional aspects of the individually cells are selected so as to maintain adequate mass-transfer coefficient and UV photon penetration depths throughout the length thereof. | 01-06-2011 |
20110027138 | Photocatalytic Device With Mixed Photocatalyst/Silica Structure - A catalytic device comprises a mixed structure of photocatalyst and silica. The mixed structure may be comprised of alternating layers of photocatalyst and silica, a layer having a uniform mixture of photocatalyst particles and silica particles, or a layer having a graded mixture of photocatalyst particles and silica particles. | 02-03-2011 |
20110117002 | SYSTEMS AND METHODS FOR REMOVAL OF CONTAMINANTS FROM FLUID STREAMS - A contaminant removal system for selectively removing contaminants from a fluid stream. The contaminant removal system has a catalytic reactor of the type that is susceptible to deactivating agents. The catalytic reactor is configured to remove contaminants from a fluid stream. The contaminant removal system has a first adsorbent device positioned upstream, with respect to the fluid stream direction, of the catalytic reactor, that is configured to remove the deactivating agents from the fluid stream. The contaminant removal system has a second adsorbent device positioned downstream, with respect to the fluid stream direction, of the catalytic reactor. The second adsorbent device is configured to remove undesirable byproducts that may be generated when the catalytic reactor removes contaminants from the fluid stream. | 05-19-2011 |
20120027657 | CONTROL SYSTEM FOR UV-PCO AIR PURIFIER - Ultraviolet photocatalytic oxidation (UV-PCO) air purification system includes controller that coordinates operation of photocatalytic reactor that removes volatile organic compounds from air and a regeneration mode that removes contaminants adsorbed in UV-PCO system. Controller coordinates operation of the regeneration mode and photocatalytic reactor so that when air purification system is turned on, the regeneration mode begins to operate before photocatalytic reactor is activated. The initial operation of the regeneration mode allows contaminants that have adsorbed in UV-PCO system to be removed before controller initiates a normal operation mode by activating photocatalytic reactor to cleanse the air. | 02-02-2012 |
20130270446 | IONIZATION WINDOW - An exemplary ionization window assembly includes a support layer having a thickness between a first side and a second side. There is at least one opening in the support layer extending between the first and second sides. The opening has a first width dimension near the first side of the support layer and a second, larger width dimension near the second side of the support layer. A window layer is supported on the second side of the support layer. The window layer extends across the opening to allow ionizing radiation to pass through the opening in a direction from the first side toward the second side. | 10-17-2013 |