US20170028093A1 - Enhanced photo-catalytic cells - Google Patents
Enhanced photo-catalytic cells Download PDFInfo
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- US20170028093A1 US20170028093A1 US15/144,980 US201615144980A US2017028093A1 US 20170028093 A1 US20170028093 A1 US 20170028093A1 US 201615144980 A US201615144980 A US 201615144980A US 2017028093 A1 US2017028093 A1 US 2017028093A1
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- catalytic coating
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- 230000001699 photocatalysis Effects 0.000 title claims abstract description 39
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 30
- 238000000576 coating method Methods 0.000 claims description 24
- 239000004408 titanium dioxide Substances 0.000 claims description 13
- 150000002500 ions Chemical class 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims description 5
- 238000002310 reflectometry Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 23
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 10
- 239000003054 catalyst Substances 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 241000700605 Viruses Species 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000002048 anodisation reaction Methods 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000013032 photocatalytic reaction Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
- A61L9/18—Radiation
- A61L9/20—Ultraviolet radiation
- A61L9/205—Ultraviolet radiation using a photocatalyst or photosensitiser
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/12—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electromagnetic waves
- B01J19/122—Incoherent waves
- B01J19/123—Ultraviolet light
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J2219/0873—Materials to be treated
- B01J2219/0875—Gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J2219/0873—Materials to be treated
- B01J2219/0892—Materials to be treated involving catalytically active material
Definitions
- the present invention generally relates to methods and apparatus for producing an enhanced ionized cloud of bactericidal molecules.
- Photo-catalytic cells may be employed to produce bactericidal molecules in air flow passing through the cells.
- the cells may be positioned to ionize air that may then be directed into an enclosed space or room. Emerging molecules from the cells may have a bactericidal effect on various bacteria, molds or viruses which may be airborne in the room or may be on surfaces of walls or objects in the room.
- such cells may be constructed with a “target material” (or coated surface(s) surrounding a broad spectrum ultraviolet (UV) emitter.
- a target material or coated surface(s) surrounding a broad spectrum ultraviolet (UV) emitter.
- UV broad spectrum ultraviolet
- the target may be coated with titanium dioxide as well as a few other proprietary trace elements.
- UV energy striking the titanium dioxide may result in a catalytic reaction that may produce the desired cloud of bactericidal molecules within the airflow. These molecules, upon contact with any bacteria, mold or virus, may kill them.
- Effectiveness of such photo-catalytic cells may be dependent on the concentration of the bactericidal molecules which may be produced by the cells.
- the bactericide concentration level may be dependent on the degree to which UV energy is applied to the titanium dioxide of the honeycomb mesh.
- a photo-catalytic cell with an ultraviolet (UV) emitter and catalyst-coated targets may be comprised of at least one UV reflector configured to reflect UV energy from the UV emitter onto the targets.
- UV ultraviolet
- the rectangular “honeycomb matrix” target shape shown in the attached FIGS. 1,2 and 3 is just one of many mechanical shapes that could use the proposed “enhanced ionization” technology proposed in this application.
- the proposed enhancement technology consist of reflective surfaces that have the unique reflective specifications as described in paragraphs 21 thru 26 .
- a method for producing bactericidal molecules in air may comprise the steps of: passing air across catalyst coated targets; emitting UV energy from a source; applying a first portion of the UV energy from the source directly onto the targets; and reflecting a second portion of the UV energy from the source onto the targets.
- FIG. 1 is a perspective view of a typical photo-catalytic cell in accordance with an embodiment of the invention in which a typical “honeycomb matrix” is shown as the “target”;
- FIG. 2 is a side elevation view of the photo-catalytic cell of FIG. 1 ;
- FIG. 3 is a cross sectional view of the photo-catalytic cell of FIG. 2 taken along the line 3 - 3 ;
- FIG. 4 is a comparison graph showing a difference in performance of the photo-catalytic cell of FIG. 1 with and without use of UV reflectors in accordance with the invention.
- embodiments of the present invention generally provide photo-catalytic cells in which reflectors may be positioned to reflect UV energy and increase a proportion of emitted UV energy that strikes titanium dioxide in the cell at high incident angles.
- an exemplary embodiment of a photo-catalytic cell 10 may comprise an electronics box 12 ; a light pipe indicator 14 ; a power cord 16 ; a chamber 18 ; honeycomb targets 20 ; UV reflectors 22 - 1 , 22 - 2 and 22 - 3 ; and a UV emitter or lamp 24 .
- the honeycomb targets 20 may be coated with titanium dioxide.
- air may pass across the honeycomb targets 20 while UV energy may be applied to the target 20 by the lamp 24 .
- a photo-catalytic reaction may take place in the presence of the UV energy.
- the reaction may produce bactericidal molecules in the air.
- the efficacy of the UV reflectors 22 - 1 may be illustrated. If the reflector 22 - 1 were not present, an emitted ray 26 might pass through the honeycomb target 20 without impinging on the titanium dioxide. However, when one of the reflectors 22 - 1 is present, an illustrative emitted ray 28 - 1 of UV energy may impinge on the UV reflectors 22 - 1 . The ray 28 - 1 may be reflected to become a reflected ray 28 - 2 . It may be seen that the reflected ray 28 - 2 may impinge on a surface of the honeycomb target 20 .
- a hypothetical unreflected ray 26 which might follow a path parallel to that of the ray 28 - 1 , might pass through the honeycomb target 20 without impinging on the target 20 .
- presence of the reflector 22 - 1 in the path of the ray 28 - 1 may result in avoidance of loss of the UV energy from the ray 28 - 1 .
- the reflectors 22 - 1 may be relatively small as compared to the size of the honeycomb target 20 . The small size (about 10% of the size of the target 20 ) may allow for minimal air flow obstruction.
- the reflectors 22 - 1 may be effective because they may reflect virtually all of the (normally lost) UV energy that is emitted in a direction that is almost orthogonal (i.e., within ⁇ 5° of orthogonality) to the outer vertical plane of the honeycomb target 20 .
- UV energy would pass thru the honeycomb target without touching the TiO2 surface.
- the number of ions created by any incoming UV ray is proportional to the sine of the incident angle (Theta) between the UV ray path and the TiO2 surface that a given ray is impacting.
- Reflectors 22 - 3 may be interposed between the lamp 24 and walls of the chamber 18 . UV energy striking the reflectors 22 - 3 may be reflected onto the honeycomb target 20 . Thus presence of the reflectors 22 - 3 may result in avoidance of loss of UV energy that might otherwise be absorbed or diffused by walls of the chamber 18 . Similarly, reflectors 22 - 2 may be placed in corners of the chamber 18 to reflect UV energy onto the honeycomb target 20 .
- the reflectors 22 - 1 , 22 - 2 and/or 22 - 3 may be constructed from material that is effective for reflection of energy with a wavelength in the UV range (i.e., about 184 nanometers [nm] to about 255 nm). While soft metals such as gold and silver surfaces may be effective reflectors for visible light, their large grain size may make them less suitable than metallic surfaces with a small grain size (i.e., hard metals). Thus, hard metals such as chromium and stainless steel and other metals that do not readily oxidize may be effective UV reflectors and may be particularly effective for use as UV reflectors in the photo-catalytic cell 10 .
- Material with a UV reflectivity of about 90% or higher may be suitable for use in the reflectors 22 - 1 , 22 - 1 and 22 - 3 . Lower reflectively produces lower effectiveness. To achieve the level of reflection required, it may be necessary to “micro-polish or buff” a selected materials reflective surface to achieve the specifications defined in para 22]-24] below.
- reflecting surfaces of the reflectors 22 should be electrically conductive.
- outer surface coatings like glass, clear plastics, clear anodization (i.e. non-conductive) may diminish (considerably) any performance enhancement of the photo-catalytic cell 10 .
- specular reflection being a “mirror-like reflection” of light—in which a single incoming light ray is reflected into a single outgoing direction
- Specular reflection is distinct from “diffuse” reflection where an incoming light ray is reflected into a broad range of directions. Diffuse reflection may diminish performance enhancement of the photo-catalytic cell 10 .
- the reflectors 22 - 1 , 22 - 2 and 22 - 3 may be chromium-plated plastic.
- Chromium-plated plastic may be a desirably low cost material with a desirably high degree of reflectivity for UV energy. So called “soft chrome” such as the plating used to produce a mirror-like finish that is seen on automobile chromed surfaces may be advantageously employed.
- the cell 10 may be circular, tubular, or may have an otherwise complex shape.
- an optimum reflector design may be curved or otherwise non-flat in shape.
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- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Epidemiology (AREA)
- Electromagnetism (AREA)
- Physics & Mathematics (AREA)
- Toxicology (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Biomedical Technology (AREA)
- Catalysts (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
Abstract
A photo-catalytic cell may produce bactericidal molecules in air by passing air across catalyst coated targets. Ultraviolet (UV) energy may be emitted from a source. A first portion of the UV energy from the source may be applied directly onto the targets. A second portion of the UV energy from the source may be reflected onto the targets.
Description
- This application claims is a continuation of U.S. patent application Ser. No. 14/065,031 filed on Oct. 28, 2013, which is a continuation of co-pending U.S. patent application Ser. No. 13/115,546 filed on May 25, 2011, and claims the benefit of U.S. Provisional Patent Application No. 61/380,462 filed on Sep. 7, 2010, all of which are herein incorporated by reference.
- The present invention generally relates to methods and apparatus for producing an enhanced ionized cloud of bactericidal molecules.
- Photo-catalytic cells may be employed to produce bactericidal molecules in air flow passing through the cells. The cells may be positioned to ionize air that may then be directed into an enclosed space or room. Emerging molecules from the cells may have a bactericidal effect on various bacteria, molds or viruses which may be airborne in the room or may be on surfaces of walls or objects in the room.
- Typically, such cells may be constructed with a “target material” (or coated surface(s) surrounding a broad spectrum ultraviolet (UV) emitter. This combination can produce an ionized cloud of bactericidal molecules. The target may be coated with titanium dioxide as well as a few other proprietary trace elements. As air passes through or onto the target, UV energy striking the titanium dioxide may result in a catalytic reaction that may produce the desired cloud of bactericidal molecules within the airflow. These molecules, upon contact with any bacteria, mold or virus, may kill them.
- Effectiveness of such photo-catalytic cells may be dependent on the concentration of the bactericidal molecules which may be produced by the cells. The bactericide concentration level may be dependent on the degree to which UV energy is applied to the titanium dioxide of the honeycomb mesh.
- As can be seen, there is a need for a system in which a higher proportion of UV energy from a UV emitter (in such a photo-catalytic cell) can be caused to impinge upon the titanium dioxide within the cell.
- In one aspect of the present invention, a photo-catalytic cell with an ultraviolet (UV) emitter and catalyst-coated targets may be comprised of at least one UV reflector configured to reflect UV energy from the UV emitter onto the targets. The rectangular “honeycomb matrix” target shape shown in the attached
FIGS. 1,2 and 3 is just one of many mechanical shapes that could use the proposed “enhanced ionization” technology proposed in this application. The proposed enhancement technology consist of reflective surfaces that have the unique reflective specifications as described in paragraphs 21thru 26. - In another aspect of the present invention, a method for producing bactericidal molecules in air may comprise the steps of: passing air across catalyst coated targets; emitting UV energy from a source; applying a first portion of the UV energy from the source directly onto the targets; and reflecting a second portion of the UV energy from the source onto the targets.
- These and other features, aspects and advantages of the present invention will become better understood with reference to the following drawings, description and claims.
-
FIG. 1 is a perspective view of a typical photo-catalytic cell in accordance with an embodiment of the invention in which a typical “honeycomb matrix” is shown as the “target”; -
FIG. 2 is a side elevation view of the photo-catalytic cell ofFIG. 1 ; -
FIG. 3 is a cross sectional view of the photo-catalytic cell ofFIG. 2 taken along the line 3-3; and -
FIG. 4 is a comparison graph showing a difference in performance of the photo-catalytic cell ofFIG. 1 with and without use of UV reflectors in accordance with the invention. - The following detailed description is of the best currently contemplated modes of carrying out exemplary embodiments of the invention. The description is not to be taken in a limiting sense, but is made merely for the purpose of illustrating the general principles of the invention, since the scope of the invention is best defined by the appended claims.
- Various inventive features are described below that can each be used independently of one another or in combination with other features.
- Broadly, embodiments of the present invention generally provide photo-catalytic cells in which reflectors may be positioned to reflect UV energy and increase a proportion of emitted UV energy that strikes titanium dioxide in the cell at high incident angles.
- Referring now to the Figures, it may be seen that an exemplary embodiment of a photo-
catalytic cell 10 may comprise anelectronics box 12; alight pipe indicator 14; apower cord 16; achamber 18;honeycomb targets 20; UV reflectors 22-1, 22-2 and 22-3; and a UV emitter orlamp 24. The honeycomb targets 20 may be coated with titanium dioxide. - In operation, air may pass across the honeycomb targets 20 while UV energy may be applied to the
target 20 by thelamp 24. A photo-catalytic reaction may take place in the presence of the UV energy. The reaction may produce bactericidal molecules in the air. - Referring now particularly to
FIG. 3 , the efficacy of the UV reflectors 22-1 may be illustrated. If the reflector 22-1 were not present, an emittedray 26 might pass through thehoneycomb target 20 without impinging on the titanium dioxide. However, when one of the reflectors 22-1 is present, an illustrative emitted ray 28-1 of UV energy may impinge on the UV reflectors 22-1. The ray 28-1 may be reflected to become a reflected ray 28-2. It may be seen that the reflected ray 28-2 may impinge on a surface of thehoneycomb target 20. It may be seen that a hypotheticalunreflected ray 26, which might follow a path parallel to that of the ray 28-1, might pass through thehoneycomb target 20 without impinging on thetarget 20. Thus, presence of the reflector 22-1 in the path of the ray 28-1 may result in avoidance of loss of the UV energy from the ray 28-1. The reflectors 22-1 may be relatively small as compared to the size of thehoneycomb target 20. The small size (about 10% of the size of the target 20) may allow for minimal air flow obstruction. In spite of their relatively small size, the reflectors 22-1 may be effective because they may reflect virtually all of the (normally lost) UV energy that is emitted in a direction that is almost orthogonal (i.e., within ±5° of orthogonality) to the outer vertical plane of thehoneycomb target 20. Hence, UV energy would pass thru the honeycomb target without touching the TiO2 surface. But by “reflecting” the UV rays onto the “opposite side” target matrix—that energy could be captured and utilized so as to add to the total ion count within the desired cloud of ionized molecules. In other words, the number of ions created by any incoming UV ray is proportional to the sine of the incident angle (Theta) between the UV ray path and the TiO2 surface that a given ray is impacting. -
- At theta=90 deg Sine (90)=1 Maximum energy gathered
- At theta=0 deg Sine (0)=0 Minimum energy gathered
- Reflectors 22-3 may be interposed between the
lamp 24 and walls of thechamber 18. UV energy striking the reflectors 22-3 may be reflected onto thehoneycomb target 20. Thus presence of the reflectors 22-3 may result in avoidance of loss of UV energy that might otherwise be absorbed or diffused by walls of thechamber 18. Similarly, reflectors 22-2 may be placed in corners of thechamber 18 to reflect UV energy onto thehoneycomb target 20. - The reflectors 22-1, 22-2 and/or 22-3 may be constructed from material that is effective for reflection of energy with a wavelength in the UV range (i.e., about 184 nanometers [nm] to about 255 nm). While soft metals such as gold and silver surfaces may be effective reflectors for visible light, their large grain size may make them less suitable than metallic surfaces with a small grain size (i.e., hard metals). Thus, hard metals such as chromium and stainless steel and other metals that do not readily oxidize may be effective UV reflectors and may be particularly effective for use as UV reflectors in the photo-
catalytic cell 10. Material with a UV reflectivity of about 90% or higher may be suitable for use in the reflectors 22-1, 22-1 and 22-3. Lower reflectively produces lower effectiveness. To achieve the level of reflection required, it may be necessary to “micro-polish or buff” a selected materials reflective surface to achieve the specifications defined in para 22]-24] below. - Advantageously, reflecting surfaces of the reflectors 22 should be electrically conductive. Specifically, outer surface coatings (added for oxidation protection) like glass, clear plastics, clear anodization (i.e. non-conductive) may diminish (considerably) any performance enhancement of the photo-
catalytic cell 10. - Also it is important that reflecting surfaces of the UV reflector 22 produce surface specular reflection. (Specular reflection being a “mirror-like reflection” of light—in which a single incoming light ray is reflected into a single outgoing direction) Specular reflection is distinct from “diffuse” reflection where an incoming light ray is reflected into a broad range of directions. Diffuse reflection may diminish performance enhancement of the photo-
catalytic cell 10. - In an exemplary embodiment of the photo-
catalytic cell 10, the reflectors 22-1, 22-2 and 22-3 may be chromium-plated plastic. Chromium-plated plastic may be a desirably low cost material with a desirably high degree of reflectivity for UV energy. So called “soft chrome” such as the plating used to produce a mirror-like finish that is seen on automobile chromed surfaces may be advantageously employed. - It may be noted that there may be other cell shape designs which are not rectangular. For example, the
cell 10 may be circular, tubular, or may have an otherwise complex shape. For these non-rectangular shaped cells, an optimum reflector design may be curved or otherwise non-flat in shape. - It should be understood, of course, that the foregoing relates to exemplary embodiments of the invention and that modifications may be made without departing from the spirit and scope of the invention as set forth in the following claims.
Claims (22)
1. An apparatus for ionizing air, the apparatus comprising:
a first target including:
an inner side arranged to receive ultra-violet (“UV”) energy from a UV emitter,
an outer side that abuts a region where an airflow is unobstructed,
a plurality of passages extending continuously between the inner side and the outer side, and
a photo-catalytic coating on the plurality of passages, wherein the photo-catalytic coating comprises titanium dioxide;
a first reflector configured to reflect UV energy from the UV emitter towards the photo-catalytic coating of the first target, wherein the first reflector is a specular UV reflector; and
wherein the first target is arranged to:
receive, through the inner side and at the photo-catalytic coating, UV energy from the UV emitter and UV energy from the first reflector, wherein incident angles of specularly reflected UV ray paths received from the first reflector are greater than incident angles of UV ray paths received directly from the UV emitter,
ionize air in response to the received UV energy, and
pass the airflow from the inner side and through the plurality of passages to carry the ionized air away from the outer side.
2. The apparatus of claim 1 , wherein a reflecting surface of the first reflector is electrically conductive.
3. The apparatus of claim 1 , wherein the first reflector comprises micro-polished stainless steel.
4. The apparatus of claim 1 , wherein the first reflector comprises a material that does not readily oxidize.
5. The apparatus of claim 1 , wherein the first reflector comprises a material having a UV reflectivity of about 90% or greater at UV wavelengths of 185 nm and 254 nm.
6. The apparatus of claim 1 , wherein the first target comprises a honeycomb matrix.
7. The apparatus of claim 1 , further comprising:
a second target opposite the first target, wherein the second target includes:
an inner side arranged to receive ultra-violet (“UV”) energy from a UV emitter,
an outer side that abuts a region where the airflow is unobstructed,
a plurality of passages between the inner side and the outer side, and
a photo-catalytic coating on the plurality of passages, wherein the photo-catalytic coating comprises titanium dioxide;
wherein the first reflector is further configured to reflect UV energy from the UV emitter towards the photo-catalytic coating of the second target; and
wherein the second target is configured to:
receive, through the inner side and at the photo-catalytic coating, UV energy from the UV emitter and the first reflector, wherein incident angles of specularly reflected UV ray paths received from the first reflector are greater than incident angles of UV ray paths received directly from the UV emitter,
ionize air in response to the received UV energy,
pass an airflow from the outer side and through the plurality of passages to carry the ionized air away from the inner side.
8. The apparatus of claim 7 , wherein the second target comprises a honeycomb matrix.
9. The apparatus of claim 1 , wherein:
each of the plurality of passages includes an ingress opening and an egress opening; and
the size of the ingress opening is the same as the size of the egress opening for a respective passage.
10. An apparatus including a chamber for ionizing air, the apparatus comprising:
a first target comprising:
a first side abutting an interior region of the chamber,
a second side abutting a region exterior to the chamber, wherein an airflow in the region exterior to the chamber is unobstructed,
a plurality of passages extending continuously between the first side and the second side of the first target, wherein each of the plurality of passages includes an ingress opening and an egress opening, and wherein the size of the ingress opening is the same as the size of the egress opening for a respective passage, and
a photo-catalytic coating on the plurality of passages, wherein the photo-catalytic coating comprises titanium dioxide;
a first reflector configured to reflect UV energy from a UV emitter towards the photo-catalytic coating of the first target, wherein the first reflector is a specular UV reflector; and
wherein the photo-catalytic coating is arranged to receive UV energy directly from the UV emitter and UV energy reflected from the first reflector.
11. The apparatus of claim 10 , further comprising at least one corner reflector arranged in an interior corner of the chamber, wherein the at least one corner reflector is a specular UV reflector.
12. The apparatus of claim 10 , wherein the chamber further includes:
a second target opposite the first target, wherein the second target includes:
a first side abutting an interior region of the chamber,
a second side abutting a region exterior to the chamber, wherein the airflow in the region exterior to the chamber is unobstructed,
a plurality of passages extending continuously between the first side and the second side of the second target, wherein each of the plurality of passages includes an ingress opening and an egress opening, and wherein the size of the ingress opening is the same as the size of the egress opening for a respective passage, and
a photo-catalytic coating on the plurality of passages, wherein the photo-catalytic coating comprises titanium dioxide;
wherein the first reflector is further configured to reflect UV energy from the UV emitter towards the photo-catalytic coating of the second target; and
wherein the photo-catalytic coating is arranged to receive UV energy directly from the UV emitter and UV energy reflected from the first reflector.
13. The apparatus of claim 12 , further comprising a second reflector opposite the first reflector and configured to reflect UV energy from the UV emitter towards the photo-catalytic coating of the first target and the photo-catalytic coating of the second target, and wherein the second reflector is a specular UV reflector.
14. The apparatus of claim 13 , further comprising:
a third reflector located at a corner between the first target and the first reflector;
a fourth reflector located at a corner between the second target and the first reflector;
a fifth reflector located at a corner between the first target and the second reflector; and
a sixth reflector located at a corner between the first target and the second reflector.
15. The apparatus of claim 14 , further comprising a seventh reflector on the first target and facing the interior region of the chamber,
wherein the seventh reflector configured to reflect UV energy that is emitted from the UV emitter in a direction that is almost orthogonal to the first target, and
wherein the seventh reflector is a specular UV reflector.
16. The apparatus of claim 10 , wherein a reflecting surface of the first reflector is electrically conductive.
17. The apparatus of claim 10 , wherein the first target comprises a honeycomb matrix.
18. The apparatus of claim 10 , wherein the first reflector comprises a material having a UV reflectivity of about 90% or greater at UV wavelengths of 185 nm and 254 nm.
19. An apparatus for ionizing air, the apparatus comprising:
a first reflector configured to reflect ultra-violet (“UV”) energy from a UV emitter, wherein the first reflector is a specular UV reflector; and
a target including plurality of passages between a region interior to the apparatus and a region exterior to the apparatus, wherein each of the plurality of passages has a photo-catalytic coating, wherein the plurality of passages is arranged to:
receive direct UV energy directly from the UV emitter,
receive specularly reflected UV energy reflected from the first reflector,
generate a first number of ions at the photo-catalytic coating in response to receiving the specularly reflected UV energy, and
generate a second number of ions at the photo-catalytic coating in response to receiving the direct UV energy,
wherein the first number of ions is greater than the second number of ions when passing an airflow of at least 272 feet per minute through the apparatus.
20. The apparatus of claim 19 , wherein the plurality of passages is further arranged to:
receive the direct UV energy at a first incident angle,
receive the specularly reflected UV energy at a second incident angle, and
wherein the second incident angle is greater than the first incident angle.
21. An apparatus for ionizing air, the apparatus comprising:
a first reflector configured to reflect ultra-violet (“UV”) energy from a UV emitter, wherein the first reflector is a specular UV reflector; and
a first target having a photo-catalytic coating comprising titanium dioxide and arranged to:
receive direct UV energy directly from the UV emitter,
receive specularly reflected UV energy reflected from the first reflector,
generate ions in response to the direct UV energy and the specularly reflected UV energy, and
emit the ions into an airflow directed to deliver the ions into an external environment.
22. The apparatus of claim 21 , wherein the photo-catalytic coating comprises titanium dioxide.
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US15/144,980 US20170028093A1 (en) | 2010-09-07 | 2016-05-03 | Enhanced photo-catalytic cells |
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US15/144,980 US20170028093A1 (en) | 2010-09-07 | 2016-05-03 | Enhanced photo-catalytic cells |
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US15/822,681 Abandoned US20180333512A1 (en) | 2010-09-07 | 2017-11-27 | Enhanced photo-catalytic cells |
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EP (1) | EP2625145B1 (en) |
JP (1) | JP5638140B2 (en) |
CN (2) | CN103261101B (en) |
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Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8585980B2 (en) * | 2010-09-07 | 2013-11-19 | Puradigm, Llc | Enhanced photo-catalytic cells |
US8585979B2 (en) | 2010-09-07 | 2013-11-19 | Puradigm, Llc | Enhanced photo-catalytic cells |
US9867897B2 (en) | 2012-09-01 | 2018-01-16 | Dbg Group Investments Llc | Active photocatalytic oxidation |
WO2016178698A1 (en) | 2015-05-06 | 2016-11-10 | Dbg Group Investments Llc | Active photocatalytic oxidation |
CN105435290B (en) * | 2015-12-18 | 2018-09-11 | 中国商用飞机有限责任公司 | Photocatalyst honeycomb assembly and photocatalyst purification device |
CN105833306B (en) * | 2016-03-31 | 2018-07-24 | 泰州市海陵区一马商务信息咨询有限公司 | For the exceeded disinfection system of bacterial concentration and its method for disinfection of different crowd |
US20200108166A1 (en) * | 2018-10-05 | 2020-04-09 | Hamilton Sundstrand Corporation | Air purifier system with ultraviolet light assembly |
CN111920999B (en) * | 2020-09-28 | 2021-01-05 | 武汉光谷航天三江激光产业技术研究院有限公司 | Based on ultraviolet laser and TiO2Photocatalytic air purification device and method |
JP6987416B1 (en) * | 2021-06-15 | 2022-01-05 | 有限会社数研 | Air sterilizer |
WO2023233156A1 (en) * | 2022-05-31 | 2023-12-07 | Pathogen Reduction systems Limited | System and device for reflecting ultraviolet radiation |
Family Cites Families (66)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3607133A (en) | 1968-10-23 | 1971-09-21 | Kachita Co Ltd | Apparatus for removing carbon monoxide from room air and exhaust gas |
US4230571A (en) | 1979-01-22 | 1980-10-28 | Dadd Robert C | Ozone/ultraviolet water purification |
JPH02164420A (en) | 1988-12-19 | 1990-06-25 | Hitachi Ltd | Deodorizing apparatus for refrigerator |
CA2127552C (en) | 1992-11-10 | 2004-10-12 | Toshiya Watanabe | Photocatalytic air treatment process under room light |
WO1998005413A1 (en) | 1996-08-05 | 1998-02-12 | Nippon Sheet Glass Co., Ltd. | Photocatalyst and process for the preparation thereof |
US6149717A (en) | 1997-01-06 | 2000-11-21 | Carrier Corporation | Electronic air cleaner with germicidal lamp |
CA2202716A1 (en) | 1997-04-15 | 1998-10-15 | The University Of Western Ontario | Photocatalytic reactor and method for destruction of organic air-borne pollutants |
KR100436705B1 (en) | 1997-05-06 | 2004-08-25 | 삼성에스디아이 주식회사 | Cathode ray tube having antibacterial coating film formed on panel unit, and method for manufacturing the same |
JP3426927B2 (en) | 1997-08-21 | 2003-07-14 | 共立電器産業株式会社 | Ion and ozone generator |
US6221314B1 (en) * | 1997-11-04 | 2001-04-24 | Wil Bigelow | Air actinism chamber apparatus and method |
US6241856B1 (en) | 1997-11-11 | 2001-06-05 | The Board Of Regents Of The University Of Oklahoma | Enhanced oxidation of air contaminants on an ultra-low density UV-accessible aerogel photocatalyst |
JPH11276558A (en) | 1998-03-30 | 1999-10-12 | Kanai Hiroaki | Apparatus for purifying fluid and photocatalyst body used for the same |
JP2000254452A (en) | 1999-03-15 | 2000-09-19 | Sharp Corp | Air purifier |
US6613277B1 (en) | 1999-06-18 | 2003-09-02 | Gerald C. Monagan | Air purifier |
JP2001062253A (en) | 1999-06-24 | 2001-03-13 | Fujitsu Ltd | Purifying device |
EP1205244B1 (en) | 1999-08-05 | 2012-05-02 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Use of a photocatalytic material |
JP4103262B2 (en) | 1999-08-25 | 2008-06-18 | 株式会社デンソー | Air purifier |
US6902653B2 (en) | 1999-11-22 | 2005-06-07 | Titan Technologies | Apparatus and method for photocatalytic purification and disinfection of fluids |
JP2001340441A (en) | 2000-03-31 | 2001-12-11 | Paramaunt Trading Co Ltd | Photocatalyst unit and wall construction |
JP3634234B2 (en) | 2000-04-24 | 2005-03-30 | 五洋建設株式会社 | Deodorizing device |
US6500387B1 (en) * | 2000-05-19 | 2002-12-31 | Nukuest, Inc. | Air actinism chamber apparatus and method |
US6700112B2 (en) * | 2001-05-29 | 2004-03-02 | Advanced Optical Technologies, Llc | High-reflectance paint for high-intensity optical applications |
US6884399B2 (en) | 2001-07-30 | 2005-04-26 | Carrier Corporation | Modular photocatalytic air purifier |
WO2003033143A1 (en) * | 2001-10-10 | 2003-04-24 | Noritake Co.,Limited | Photocatalytic material selectively inactivating biologically harmful substance and utilization thereof |
US20030211022A1 (en) | 2002-05-10 | 2003-11-13 | Gross Karl J. | Method and apparatus for decontaminating water or air by a photolytic and photocatalytic reaction |
US20040013583A1 (en) | 2002-07-19 | 2004-01-22 | Aerus Llc | Apparatus and method for a sanitizing air filter |
JP3390429B1 (en) * | 2002-09-18 | 2003-03-24 | サカエ理研工業株式会社 | Air purification filter device |
WO2004045660A1 (en) | 2002-11-15 | 2004-06-03 | Fujitsu Limited | Air cleaner |
EP1600699A4 (en) | 2002-12-30 | 2007-06-13 | Chiaphua Ind Ltd | Air cleaner |
US20040166037A1 (en) | 2003-02-25 | 2004-08-26 | Youdell Harry F. | Air filtration and treatment apparatus |
EP1656985A4 (en) | 2003-04-23 | 2008-10-29 | Nat Inst Of Advanced Ind Scien | Three-dimensional fine cell structured photocatalyst filter responding to visible light and method for production thereof, and clarification device |
JP4022920B2 (en) | 2003-05-08 | 2007-12-19 | 株式会社バリテック新潟 | Air purification device |
US7063820B2 (en) | 2003-06-16 | 2006-06-20 | University Of Florida Research Foundation, Inc. | Photoelectrochemical air disinfection |
US20050019120A1 (en) * | 2003-07-25 | 2005-01-27 | Penn Troy Manufacturing, Inc. | Worm gear having thread pitch and method for making same |
US20050063881A1 (en) | 2003-07-30 | 2005-03-24 | Senne Dennis R. | Air purifier including a photocatalyst |
US7279144B2 (en) | 2003-09-23 | 2007-10-09 | Carrier Corporation | Reflective lamp to maximize light delivery to a photoactive catalyst |
JP4010416B2 (en) | 2003-11-21 | 2007-11-21 | 一朗 阿部 | Fluid purification device |
JP2005198846A (en) | 2004-01-16 | 2005-07-28 | Shigeaki Kokubo | Air cleaning method and apparatus using photocatalyst |
US7988923B2 (en) | 2004-02-23 | 2011-08-02 | Rgf Environmental Group, Inc. | Device, system and method for an advanced oxidation process using photohydroionization |
US20050191205A1 (en) | 2004-02-27 | 2005-09-01 | Federico Uslenghi | Indoor air quality module including a shield to minimize the leakage of ultraviolet light |
CN100373107C (en) | 2004-04-06 | 2008-03-05 | 北京工业大学 | Light conduit system for realizing light catalytic air purification and natural ventilation |
JP2005343427A (en) | 2004-06-07 | 2005-12-15 | Shigeaki Kokubo | In-vehicle air cleaning device |
WO2005123246A1 (en) * | 2004-06-15 | 2005-12-29 | Sumitomo Electric Industries, Ltd. | Normal radiation device, filter using the same, optically assisted ceramic filter |
HK1063575A2 (en) | 2004-06-23 | 2004-11-26 | John Mfg Ltd | Multi-function optoelectronic air-conditioner. |
GB2415774B (en) | 2004-06-30 | 2007-06-13 | Alan Mole | Air decontamination device and method |
CN1803202A (en) * | 2005-01-14 | 2006-07-19 | 彭先锋 | Air purifying method |
US20080031783A1 (en) | 2005-04-02 | 2008-02-07 | Briggs Daniel J | Photocatalytic fabric |
US7520978B2 (en) | 2005-06-17 | 2009-04-21 | Philips Lumileds Lighting Co., Llc | Fluid purification system with ultra violet light emitters |
US7476885B2 (en) | 2006-02-22 | 2009-01-13 | Oreck Corporation | Disinfecting device utilizing ultraviolet radiation |
US20070251812A1 (en) | 2006-03-27 | 2007-11-01 | Hayman John J Jr | Photocatalytic air treatment system and method |
US8003058B2 (en) | 2006-08-09 | 2011-08-23 | Airinspace B.V. | Air purification devices |
US20080112845A1 (en) | 2006-11-15 | 2008-05-15 | Dunn Charles E | Air Cleaning Unit, and Method of Air Disinfection |
US20080253941A1 (en) | 2006-12-29 | 2008-10-16 | Wichers Donald W | Ultraviolet (uv) radiation source-based surface disinfection system |
JP2008200645A (en) * | 2007-02-22 | 2008-09-04 | Fujifilm Corp | Air cleaner |
US7820100B2 (en) | 2007-05-17 | 2010-10-26 | Garfield Industries, Inc. | System and method for photocatalytic oxidation air filtration using a substrate with photocatalyst particles powder coated thereon |
US8012412B2 (en) | 2007-08-02 | 2011-09-06 | Vollara, Llc | Method and device for purifying ambient air and surfaces |
US7824626B2 (en) | 2007-09-27 | 2010-11-02 | Applied Nanotech Holdings, Inc. | Air handler and purifier |
US20090152096A1 (en) | 2007-12-12 | 2009-06-18 | John Carlson | Method and system for the application of materials to improve indoor air quality |
CN101468845A (en) | 2007-12-28 | 2009-07-01 | 北京锦奥华荣科技有限公司 | Photocatalysis oxidation water purification tank |
US8067750B2 (en) | 2008-01-29 | 2011-11-29 | Deal Jeffery L | Area sterilizer and method of disinfection |
KR100874130B1 (en) | 2008-01-30 | 2008-12-15 | (주)동남이엔지 | Purification device using photocatalyst |
KR100997378B1 (en) | 2008-10-09 | 2010-11-30 | 주식회사 케네스 | Photocatalyst apparatus using porous pipe and air purification apparatus using the same |
US8017073B2 (en) | 2008-11-28 | 2011-09-13 | Life Spring Limited Partnership | High intensity air purifier |
US20100202932A1 (en) | 2009-02-10 | 2010-08-12 | Danville Dennis R | Air movement system and air cleaning system |
US20100266445A1 (en) * | 2009-04-21 | 2010-10-21 | Kenneth L. Campagna | Portable antimicrobial ultra violet sterilizer |
US8585979B2 (en) | 2010-09-07 | 2013-11-19 | Puradigm, Llc | Enhanced photo-catalytic cells |
-
2011
- 2011-05-25 US US13/115,546 patent/US8585979B2/en active Active
- 2011-09-07 MX MX2013002687A patent/MX2013002687A/en active IP Right Grant
- 2011-09-07 EP EP11824058.9A patent/EP2625145B1/en active Active
- 2011-09-07 CA CA2839428A patent/CA2839428C/en active Active
- 2011-09-07 CN CN201180053624.4A patent/CN103261101B/en active Active
- 2011-09-07 JP JP2013528266A patent/JP5638140B2/en active Active
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2016
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2017
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MX2013002687A (en) | 2013-06-03 |
HK1212637A1 (en) | 2016-06-17 |
WO2012033818A1 (en) | 2012-03-15 |
CA2839428C (en) | 2016-08-02 |
JP2014503338A (en) | 2014-02-13 |
CN103261101A (en) | 2013-08-21 |
EP2625145A1 (en) | 2013-08-14 |
EP2625145B1 (en) | 2019-06-05 |
US8585979B2 (en) | 2013-11-19 |
JP5638140B2 (en) | 2014-12-10 |
CN104784733A (en) | 2015-07-22 |
US20140050610A1 (en) | 2014-02-20 |
CN103261101B (en) | 2015-04-15 |
CN104784733B (en) | 2018-04-20 |
US20120058006A1 (en) | 2012-03-08 |
CA2839428A1 (en) | 2012-03-15 |
US20180333512A1 (en) | 2018-11-22 |
EP2625145A4 (en) | 2014-04-16 |
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