Description:Field of the invention:
[001] The present disclosure relates to a method and system for air purification, more particularly the disclosure ¬¬¬relates to a system and method for enhanced indoor air quality and lighting
Background of the invention:
[002] In the present global scenario, most people spend significant amounts of time in habitable environments such as enclosed indoor spaces associated with homes, apartments, condominium units, hotel suites or rooms, motel suites or rooms, spas, hospitals, and other public and private facilities. Recent studies have shown that the level of invisible airborne organic chemical and odour contaminates, as well as ozone and other oxidant related contaminates, in our indoor air is generally two to five times higher than the levels found outdoors. Potentially harmful contaminates known as volatile organic compounds (VOCs) are a large group of carbon-based chemicals that easily evaporate at room temperature. Concerns about the effects of indoor air quality on human health have increased in recent years. As information about the health risks related to exposure to various types of contaminants becomes available, interest in maintaining a healthy indoor environment has increased.
[003] The US patent US 10,363,327 B2 describes a luminaire with white light LEDS and UV LEDs for lighting and disinfection. The combined Disinfection and Lighting luminaire comprising of at least three sets of LEDs. The first set of LEDs producing the white light to illuminate the room. The second set of LEDs with UVC emitters directed in downward direction to illuminate the surfaces in the room. The third set of LEDS again emitting UVC light is not directed in downward direction and is used for disinfection of air in the room. The luminaire also makes use of body temperature based sensor to detect the occupancy in the room and turns the second set of LEDs off when the room is occupied. The third set of LEDs will remain ON always when the first set of LEDS in ON. The first set of LEDs makes use of Red, Green and blue light emitting LEDS to produce white light. The device also makes use of UVC LEDs that has low efficiency in terms of air disinfection as the UVC LED efficacy itself is very low. Also the disinfection in this case is completely dependent on the air circulation or ventilation within the room to take the air in upper part of the room.
[004] US patent number US20070045641A1 describes a While light emitting LED which makes use of UV LED emitting in the wavelength range of 380 to 410 nm. The UV light is made to fall on to the Phosphor layer which converts the UV light in to white light. There is also reflector arrangement for reflecting the non absorbed UV light by phosphor layer again on the same layer to add the white light intensity. Even though this is UV LED application to produce white light it cannot be used for air disinfection application as it is in UVA range.
[005] One more patent US20080008620A1 describes a light bulb consisting of two filaments one UV filament and one White light filament contained within a single outer cover. The device comprises of these two light sources along with a housing unit, a switch within, a switch outside and a sensor that senses the human motion. The outer switch enables the automatic or manual operation switching the lamp ON/OFF etc. The arrangement of the motion sensor is made such that when there is no occupancy in the room UV lamp will be switched ON and Lighting lamp (Fluorescent or incandescent) is switched OFF. The arrangement of switch is such that either of the sources (UV and lighting) is ON; both lamps ON condition is not possible. This system takes care of surface disinfection when the room is unoccupied but does not take care of air disinfection to that level.
[006] Another US patent US 20170151359A1 describes use of light sources of different wavelengths in the range of 280 nm to 380 nm along with blue light for disinfection of surfaces and human at the same time. The UV intensity over the area of the floor is adjusted such that it will inactivate one more pathogens by illuminating the surfaces as well as human being at the same time and due to the wavelength in the range of UVA and UVB range and its low intensity it is not harmful to the human under exposure. The emission of wavelengths between 280 nm to 380 nm is adjusted such that such that the emission includes no more than 0.001 watts of actinic ultraviolet light per square meter of floor area, including no more than 10 watts per square meter of floor area of ultraviolet A light, and including no more than 100 watts of blue light per steradian per square meter of floor area.
[007] The prior arts are either based on UVA, UVB sources (US20070045641A1, US 20170151359A1, US20070045641A1) which are not efficient as far as germicidal action is concerned or make use of UVC LEDs which are efficient as germicidal source but efficacy wise inferior to the mercury based low pressure UVC lamps. The patents are also used mainly for surface disinfection or for air disinfection when there is no human occupancy (US20080008620A1). US 10,363,327 B2 claims about the air disinfection during human occupancy but makes use of inferior source i.e. UVC LEDS also the air disinfection in this case is dependent on the air circulation or the ventilation in the room which further reduces the efficiency of the system in terms of air disinfection.
[008] Hence, there is a need in the art for a system and method thereof that addresses the shortcomings of the existing art and provides enhanced indoor air quality and lighting.
Objects of the invention:
An objective of the present invention is to provide a system and method tfor converting the existing LED lighting fixtures used for lighting application into a lighting and IAQ enhancement system.
Another objective of the present invention is to increase or improve the IAQ enhancement efficiency of the system by providing a three in one action including: a) Air disinfection with UV germicidal lamp and PCO; b) VOC and PM reduction with PCO; and c) existing room lighting with LEDs.
Summary of the invention
[009] The present invention provides a method and system for air purification, more particularly the disclosure ¬¬¬relates to a system and method for enhanced indoor air quality and lighting. The system and method thereof make use of existing or new LED lighting fixture to be used for lighting application to convert it in to Indoor Air Quality (IAQ) Enhancement system with lightening with addition of small unit attachment. The regular lighting system that makes use of LED lighting strip for lighting application can be converted in to lighting and IAQ enhancement system with the help of this unit attachment. The Unit consists of a control box which consists of a) an inbuilt power supply that can run the DC fan in the unit at the same time can also be used to drive the LED strips. b) It also has a electronic ballast to drive UV lamp and c) the controller circuit that can keep only lighting ON or only UV Zone ON or both ON based on the power supply switch ON/OFF. The unit makes use of a silent fan to pass the air through the IAQ enhancement zone created by a UV lamp and a nano-particle coating around it improving the IAQ. The efficiency of IAQ enhancement is further improved by making use of Lighting LED and UV lamp together.
[0010] The system of the present invention, a system for enhanced indoor air quality and lighting is comprise of at least one enclosure unit, the enclosure unit having at least one surface section translucent, at least one other inner surface coated with a photo catalytic oxidation (PCO) coating and an air inlet at one end of the at least one enclosure unit. The system comprises a plurality of white light LEDs constituting white light LED lamp, at least one UV lamp configured to emit UVC light upon excitation through electrical power. The system comprises a fan mechanism adapted at the other end of the at least one enclosure unit and configured to generate airflow through the at least one enclosure unit. The system comprise of a control box comprising at least one high efficiency DC driver configured to provide electrical power to run the fan mechanism and operate and drive the plurality of white light LEDs, at least one high frequency ballast circuit to provide electrical power to operate and drive the UV lamp, and a controller circuit to control and provide selection of the mode with an ON/OFF switch trigger based on OFF time delay and operate the system in three modes of operation UV mode, lighting mode and dual mode by controlling the power input to at least one high frequency ballast circuit and the at least one high efficiency DC driver. The system comprises at least one ON/OFF switch configured and electrically connected to the control box to provide trigger pulse to the control box for operation mode selection.
[0011] The method of the present invention, a method for enhanced indoor air quality and lighting includes step of constructing at least one enclosure unit, the enclosure unit having at least one surface section translucent, at least one other inner surface coated with a photo catalytic oxidation (PCO) coating; an air inlet at one end of the at least one enclosure unit; and fan mechanism adapted at the other end of the at least one enclosure unit and configured to generate airflow through the at least one enclosure unit. The method includes step of mounting, a plurality of white light LEDs the at least one enclosure unit on inner surface other than the translucent surface. The method includes step of mounting, at least one UV lamp inside the at least one enclosure unit on inner surface other than the translucent surface. The method includes step of connecting electrically, at least one high frequency ballast circuit to the UV lamp to provide the electrical power and connecting electrically the at least one high frequency ballast circuit to a controller circuit of a control box to receive the power inputs. The method includes step of connecting electrically, at least one high efficiency DC driver to the plurality of white light LEDs to provide the electrical power and connecting electrically the at least one high efficiency DC driver to a controller circuit of a control box to receive the power inputs. Further, the method includes step of connecting electrically, a fan mechanism to at least one high efficiency DC driver of a control box and powering and switching it ON during all operational modes by controller circuit of a control box to generate airflow through the at least one enclosure unit. The method includes step of connecting electrically at least one ON/OFF switch to the control box to provide trigger pulse to the control box for operation mode selection. The method includes step of configuring a controller circuit of a control box to provide selection of the mode with ON/OFF switch trigger based on OFF time delay. The method includes step of operating system in desired/selected mode out of UV mode, lighting mode or dual mode to provide enhanced indoor air quality and lighting.
Brief description of the drawings:
[0012] The embodiments can be better understood with reference to the following drawings and description. The components in the figures are not necessarily to scale, the emphasis instead being placed upon illustrating the principles of the embodiments. Moreover, the figures, like reference numerals designate corresponding parts throughout the different views.
[0013] Reference will be made to embodiments of the invention, examples of which may be illustrated in the accompanying figures. These figures are intended to be illustrative, not limiting. Although the invention is generally described in the context of these embodiments, it should be understood that it is not intended to limit the scope of the invention to these particular embodiments.
[0014] The above and other objects, features, and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
Figure 1 illustrates a Schematic showing the exploded view of the system for enhanced indoor air quality and lighting, according to an exemplary implementation of the present invention.
Figure 2 illustrates a Schematic showing the system for enhanced indoor air quality and lighting to be installed in false ceiling, according to an exemplary implementation of the present invention.
[0015] It should be appreciated by those skilled in the art that any block diagrams herein represent conceptual views of illustrative systems embodying the principles of the present invention. Similarly, it will be appreciated that any flowcharts, flow diagrams, and the like represent various processes which may be substantially represented in a computer-readable medium and so executed by a computer or processor, whether or not such computer or processor is explicitly shown.
Detailed description of the invention:
[0016] The embodiments herein provide a method and system for air purification, more particularly the disclosure ¬¬¬relates to a system and method for enhanced indoor air quality and lighting. The system and method thereof make use of existing or new LED lighting fixture to be used for lighting application to convert it in to Indoor Air Quality (IAQ) Enhancement system with lightening with addition of small unit attachment. The regular lighting system that makes use of LED lighting strip for lighting application can be converted in to lighting and IAQ enhancement system with the help of this unit attachment. The Unit consists of a control box which consists of a) an inbuilt power supply that can run the DC fan in the unit at the same time can also be used to drive the LED strips. b) It also has a electronic ballast to drive UV lamp and c) the controller circuit that can keep only lighting ON or only UV Zone ON or both ON based on the power supply switch ON/OFF. The unit makes use of a silent fan to pass the air through the IAQ enhancement zone created by a UV lamp and a nano-particle coating around it improving the IAQ. The efficiency of IAQ enhancement is further improved by making use of Lighting LED and UV lamp together.
[0017] In the following description, for the purpose of explanation, specific details are set forth in order to provide an understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these details. One skilled in the art will recognize that embodiments of the present invention, some of which are described below, may be incorporated into a number of systems.
[0018] Furthermore, connections between components and/or modules within the figures are not intended to be limited to direct connections. Rather, these components and modules may be modified, re-formatted, or otherwise changed by intermediary components and modules.
[0019] References in the present invention to “one embodiment” or “an embodiment” mean that a particular feature, structure, characteristic, or function described in connection with the embodiment is included in at least one embodiment of the invention. The appearances of the phrase “in one embodiment” in various places in the specification are not necessarily all referring to the same embodiment.
[0020] Hereinafter, embodiments will be described in detail. For clarity of the description, known constructions and functions will be omitted.
[0021] Parts of the description may be presented in terms of operations performed by at least one electrical/electronic circuit, a processing/controlling system, using terms such as switch, controller, circuit, state, link, fault, driver and the like, consistent with the manner commonly employed by those skilled in the art to convey the substance of their work to others skilled in the art. For instance, some embodiments may be implemented by a processing system that executes program instructions so as to cause the processing system to perform operations involved in one or more of the methods described herein. The program instructions may be computer-readable code, such as compiled or non-compiled program logic and/or machine code, stored in a data storage that takes the form of a non-transitory computer-readable medium, such as a magnetic, optical, and/or flash data storage medium. Moreover, such processing system and/or data storage may be implemented using a single processing system or may be distributed across multiple processing systems that are communicatively linked through a network to allow the processing systems to operate in a coordinated manner.
[0022] Embodiments of the present invention include various steps, which will be described below. The steps may be performed by hardware components or may be embodied in machine-executable instructions, which may be used to cause a general-purpose or special-purpose processor programmed with the instructions to perform the steps. Alternatively, steps may be performed by a combination of hardware, software, firmware, and/or by human operators.
[0023] As used in the description herein, the meaning of "a, an," and "the" includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of "in" includes "in" and "on" unless the context clearly dictates otherwise.
[0024] Exemplary embodiments will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this invention will be thorough and complete and will fully convey the scope of the invention to those of ordinary skill in the art. Moreover, all statements herein reciting embodiments of the invention, as well as specific examples thereof, are intended to encompass both structural and functional equivalents thereof. Additionally, it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future (i.e., any elements developed that perform the same function, regardless of structure).
[0025] While embodiments of the present invention have been illustrated and described, it will be clear that the invention is not limited to these embodiments only. Numerous modifications, changes, variations, substitutions, and equivalents will be apparent to those skilled in the art, without departing from the scope of the invention.
[0026] In an implementation according to one of the embodiments, the present invention is a system and method thereof for enhanced indoor air quality and lighting. According to one of the embodiments, one of the objectives of the system and method thereof of the present invention is to convert the existing LED lighting fixtures used for lighting application into a lighting and IAQ enhancement system.
[0027] According to one of the embodiments one of the objectives of the system and method thereof of the present invention is to increase or improve the IAQ enhancement efficiency of the system by providing a three in one action. The three in one action is achieved with introduction of Photo catalytic Oxidation (PCO) coating on the inside wall of the system. The PCO coating will give improved air disinfection compared to only UV disinfection, reduction in Volatile Organic Compounds (VOCs) resulting in odour reduction and Particulate Matter (PM 2.5, PM10 etc.) reduction after exposure to UV and/or Visible light. The three actions a) Air disinfection with UV germicidal lamp and PCO b) VOC and PM reduction with PCO and c) existing room lighting with LEDs are the three actions which will form the three in one action of the complete system.
[0028] According to one of the embodiments the system and method thereof of the present invention provides three modes of operation in the system with one mode called UV Mode in which IAQ enhancement is achieved even during human occupancy with help of UV lamp and PCO coating. The second mode called only lighting mode in which the UV lamp is switched off and only white light LEDs are ON. The PCO coating in this mode is activated with visible white light LEDs mounted inside the unit and work with low efficiency resulting in low efficiency IAQ enhancement as compared to UV mode. In this mode the room lighting is also working. The third mode is called as Dual Mode wherein the IAQ enhancement is achieved with best efficiency using UV Lamp, white light LEDs and PCO coating and at the same time room lighting requirement of the occupant is also fulfilled with LEDs.
[0029] According to one of the embodiments the system and method thereof of the present invention provides a selection of the mode with ON/OFF switch based on OFF time delay. If the OFF time is higher than the pre-defined specified time (e.g. 4 sec.), then previous mode will be continued and if the OFF time is lower than the pre-defined specified time (e.g. 4 sec.) the mode will shift to other mode of operation.
[0030] According to one of the embodiments the system and method thereof of the present invention maximize the efficiency of IAQ enhancement with the help of white light LEDs mounted inside the unit by activating the PCO in addition to activation with UVC light leading to highest efficiency of IAQ enhancement in Dual mode. Also give low efficiency of IAQ enhancement in absence of UVC light by activating PCO with only white light LEDs which leads to give some IAQ enhancement even in lighting mode. The system and method thereof of the present invention provide some IAQ enhancement in all three modes so that functionally only lighting system is converted in to Lighting plus IAQ enhancement system.
[0031] According to one of the embodiments the system and method thereof of the present invention improves the efficiency of the system for air disinfection using UVC mercury lamp with high efficacy and high output, PCO coating and by using white light LEDs for room lighting application in the same system. The present invention provides a system and method thereof that can be used for air disinfection even in case of human occupancy without any impact of UVC lamp on the occupants.
[0032] According to one of the embodiments the system and method thereof of the present invention provides a system with a fan mechanism that will work even in absence of air circulation in the room or will work more efficiently in case of additional air circulation.
[0033] According to one of the embodiments the system and method thereof of the present invention provides IAQ enhancement with reduction in microbes, VOCs and particulate matter through the three in one action.
[0034] According to one of the embodiments the system and method thereof of the present invention provides a unit that can convert a lighting system that is used as a down lighter (using hanger arrangement) or wall mounted (using clipping arrangement) system for two different applications one being IAQ enhancement and other being room lighting. Furthermore, the unit can convert lighting fixtures (e.g. a 2 ft. X 2 ft. or any other lighting fixture) that fits in to a false ceiling into a IAQ enhancement and lighting fixture.
[0035] According to one of the embodiments the system and method thereof of the present invention relates to the system formed with a) the existing LED lighting fixture used for room lighting and b) the additionally introduced unit that will be used for efficient IAQ enhancement. The combined system formed thus will serve for two different applications first application is IAQ enhancement by means of microbial disinfection, VOC reduction and Particulate Matter (PM2.5, PM10) reduction. The second application is room lighting application i.e. provide white light using LEDs in the room.
[0036] Figure 1 illustrates a Schematic showing the exploded view of the system (100) for enhanced indoor air quality and lighting, according to an exemplary implementation of the present invention. According to one of the embodiments the system (100) for enhanced indoor air quality and lighting comprises of at least one enclosure unit (8), the enclosure unit (8) having at least one surface section translucent, at least one other inner surface coated with a photo catalytic oxidation (PCO) coating (4) and an air inlet (6) at one end of the at least one enclosure unit (8). The system (100) comprises a plurality of white light LEDs (7) constituting white light LED lamp, at least one UV lamp (1) configured to emit UV light upon excitation through electrical power. The system (100) comprises a fan mechanism (5) adapted at the other end of the at least one enclosure unit (8) and configured to generate airflow through the at least one enclosure unit (8). The system (100) comprise of a control box (2) comprising at least one high efficiency DC driver configured to provide electrical power to run the fan mechanism (5) and operate and drive the plurality of white light LEDs (7), at least one high frequency ballast circuit to provide electrical power to operate and drive the UV lamp (1), and a controller circuit to control and provide selection of the mode with an ON/OFF switch trigger based on OFF time delay and operate the system in three modes of operation UV mode, lighting mode and dual mode by controlling the power input to at least one high frequency ballast circuit and the at least one high efficiency DC driver. The system comprises at least one ON/OFF switch configured and electrically connected to the control box to provide trigger pulse to the control box for operation mode selection.
[0037] According to one of the embodiments of the present invention the system (100) includes a control box (2) that provides three modes of operation UV Mode, Lighting Mode and Dual Mode. When operated in UV Mode only the UV lamp (1) which is low pressure mercury vapor lamp (operated using high frequency ballast circuit) gets switched ON and Lighting LEDs are switched OFF. In this mode with UV Lamp and UV activated PCO coating (4) serves to give efficient IAQ enhancement. In the Lighting Mode, the UV lamp (1) is switched OFF and Lighting LEDs (7) are switched ON (operated using high efficiency DC driver). In this mode the visible white light LEDs (7) fitted inside the IAQ enhancement unit are used to activate the PCO coating (4) and serves for enhancement in IAQ with low efficiency (as compared to UV and white light plus PCO coating efficiency) and the room lighting can be used alongside to that. Whereas in the Dual Mode the White light LEDs inside the IAQ enhancement unit are switched ON along with UV lamp (1) which enables the system to use for maximizing the efficiency of IAQ enhancement and also for room lighting application.
[0038] According to one of the embodiments the control box (2) of the system (100) allows the selection of modes based on ON/OFF switching action (using a control circuit in the control box) and the time delay of the OFF position is predefined and can be set to desired value e.g. time delay currently set at 4 second. The delay time can be changed by modifying the program and is preset during manufacturing. When the delay is set as 4 sec. if the OFF time is less than 4 sec., i.e. ON – OFF – ON switching is done with OFF time less than 4 seconds the mode will change from UV Mode to Light Mode and to Dual Mode based on set sequence and the previous mode of operation. When the delay is more than 4 second the system will operate on the previous selected mode. These modes give the flexibility or choice of using the system only for efficient IAQ enhancement application or for room lighting application with low efficiency IAQ enhancement or for both room lighting with efficient IAQ enhancement application for the end user.
[0039] According to one of the embodiments the system and method thereof of the present invention provides a unit which can be added and coupled with the LED lighting fixture of maximum 40W (limited by only existing driver wattage but not otherwise) as single fixture or multiple fixtures which gives IAQ enhancement achieved by the use of UV lamp (1) and the white light LEDs (7) which are fitted in the closed section of the Aluminium extrusion (3) and coated with Photo Catalytic Oxidation (PCO) Coating (4). The aluminium extrusion can be replaced by rectangular tube fabricated using Aluminium sheet or aluminium pipe not limited in shape and form of material used to give the tube form. Any other metals such as steel can be used but preferably Aluminium is used due to its high reflectivity to UV light and very good adherence of PCO coating with aluminium. The Aluminium extruded casing can be replaced by any other UV resistant plastic molded casing or any other metal casing. The Tube is fitted with fan (5) at one end and opening (6) for air intake from other end such that the air will pass through the IAQ enhancement zone formed inside the unit. When this unit is switched ON, it provides the IAQ enhancement with the microbial disinfection achieved by emission of UVC light. The unit also makes use of the Photo Catalytic Oxidation (PCO) coating given on the inner wall of the Unit to provide additional microbial disinfection along with VOC reduction as well as PM2.5 & PM10 reduction. This is achieved by activating the coating with UVC lamp and / or visible white light from LEDs which in turn converts the organic matter in water and CO2. The only difference being the activation of PCO with visible light is less efficient as compared to activation with UVC light. The PCO coating is a mixture of two phases of TiO2 namely the Rutile phase and Anatase phase. The UV absorption of Rutile phase is very high and that of Anatase phase is low. The Anatase phase activity increases in presence of visible light. Thus, the PCO coating can be activated by both UV and visible light if both phases are present, but the IAQ enhancement is less efficient (in terms of microbial disinfection and VOC reduction and not in terms of PM reduction) when coating is activated with visible light as Routile phase does not get activated and IAQ enhancement is more efficient when the activation is done using UV and visible both (in terms of microbial disinfection and VOC reduction and not in terms of PM reduction). All the above mentioned actions result in IAQ enhancement. The circulating fan makes it sure that the air passes through the IAQ enhancement zone created inside the unit and IAQ enhancement is not dependent on the air circulation or ventilation inside the room. The air inlet/inlets can be at the far end from the fan mounting end or can be in between both ends with other end closed hence not restricted in position as long as it is passing all the air through the IAQ enhancement zone. The unit can have linear arrangement of fan, IAQ enhancement zone and air inlet if it is fitted inside the working room.
[0040] Figure 2 illustrates a Schematic showing the system (100) for enhanced indoor air quality and lighting to be installed in false ceiling, according to an exemplary implementation of the present invention. According to one of the embodiments of the present invention the system (100) can make use of alternative non linear arrangement of fan (5), IAQ enhancement zone and air inlet (6) as shown in fig. 2 with bend inlet (9) as shown in fig. 2 and outlet (10) as shown in fig. 2, not restricted to any specific angle for circulating the air in working room if it has to be fitted in / above the false ceiling.
[0041] According to one of the embodiments the system and method thereof of the present invention can make use of existing or new LED lighting fixture to be used for lighting application specifically for room lighting coupled with the IAQ enhancement unit described above. The system thus formed can fulfill both the lighting requirement of the occupant and at the same time can improve the IAQ. For coupling the existing LED lighting fixture / s (with maximum 40 W LED load), the LED load needs to be connected to the driver provided with the IAQ enhancement unit control box either inside the unit or outside. The lighting application is covered under the lighting Mode or Dual Mode where both the applications are catered at the same time vis. IAQ enhancement and Lighting inside the room the only difference being in lighting mode the IAQ enhancement is less efficient and low power consuming as compared to Dual mode where the IAQ enhancement is more efficient and more power consuming due to additional use of UV lamp. The UV mode can serve only the IAQ enhancement and does not serve the room lighting.
[0042] In an implementation according to one of the embodiments the system of the present invention, a system for enhanced indoor air quality and lighting is comprise of at least one enclosure unit, the enclosure unit having at least one surface section translucent, at least one other inner surface coated with a photo catalytic oxidation (PCO) coating and an air inlet at one end of the at least one enclosure unit. The system comprises a plurality of white light LEDs constituting white light LED lamp, at least one UV lamp configured to emit UVC light upon excitation through electrical power. The system comprises a fan mechanism adapted at the other end of the at least one enclosure unit and configured to generate airflow through the at least one enclosure unit. The system comprise of a control box comprising at least one high efficiency DC driver configured to provide electrical power to run the fan mechanism and operate and drive the plurality of white light LEDs, at least one high frequency ballast circuit to provide electrical power to operate and drive the UV lamp, and a controller circuit to control and provide selection of the mode with an ON/OFF switch trigger based on OFF time delay and operate the system in three modes of operation UV mode, lighting mode and dual mode by controlling the power input to at least one high frequency ballast circuit and the at least one high efficiency DC driver. The system comprises at least one ON/OFF switch configured and electrically connected to the control box to provide trigger pulse to the control box for operation mode selection.
[0043] In an implementation according to one of the embodiments the at least one enclosure unit of the system of the present invention is made up of Aluminium extrusion or rectangular tube fabricated using Aluminium sheet or aluminium pipe not limited in shape and form of material used to give the tube form or any other metals such as steel encapsulating a translucent material forming one of the surfaces of the at least one enclosure along the length of the at least one enclosure. The at least one enclosure unit have its inner surfaces other than the translucent surface coated with a photo catalytic oxidation (PCO) coating, the photo catalytic oxidation (PCO) coating a mixture of two phases of TiO2 the Rutile phase and Anatase phase.
[0044] In an implementation according to one of the embodiments the system of the present invention comprises the plurality of white light LEDs are mounted inside the at least one enclosure unit on inner surface other than the translucent surface and the at least one UV lamp mounted inside the at least one enclosure unit on inner surface other than the translucent surface. The at least one UV lamp in power on stage activates both the phases, the Rutile phase and Anatase phase of photo catalytic oxidation (PCO) coating. The plurality of white light LEDs in power on stage activates anatase phase of photo catalytic oxidation (PCO) coating.
[0045] In an implementation according to one of the embodiments of the present invention the system upon power on performs microbial disinfection by emission of UVC light and performs by activating the photo catalytic oxidation (PCO) coating, additional microbial disinfection along with volatile organic compounds (VOC) reduction as well as particulate matter reduction.
[0046] In an implementation according to one of the embodiments of the system of present invention the at least one high frequency ballast circuit is electrically connected to the UV lamp to provide the electrical power and electrically connected to the controller circuit of the control box to receive the power inputs. Also, the at least one high efficiency DC driver is electrically connected to the plurality of white light LEDs to provide the electrical power and electrically connected to the controller circuit of the control box to receive the power inputs.
[0047] In an implementation according to one of the embodiments of the system of present invention the controller circuit of the control box is configured to provide selection of the mode with ON/OFF switch trigger based on OFF time delay wherein previous mode will be continued if the OFF time is higher than a predefined delay and switch the mode based on set sequence and the previous mode of operation if the OFF time is lower than a predefined delay.
[0048] In an implementation according to one of the embodiments of the system of present invention the controller circuit of the control box to operate the system in UV mode is configured to switch on UV lamp by providing electrical power to the at least one high frequency ballast circuit electrically connected to the UV lamp and switch OFF the plurality of white light LEDs by terminating supply of electrical power to the at least one high efficiency DC driver electrically connected to the plurality of white light LEDs.
[0049] In an implementation according to one of the embodiments of the system of present invention the controller circuit of the control box to operate the system in lighting mode is configured to switch OFF UV lamp by terminating supply of electrical power to the at least one high frequency ballast circuit electrically connected to the UV lamp and switch ON the plurality of white light LEDs by providing supply of electrical power to the at least one high efficiency DC driver electrically connected to the plurality of white light LEDs.
[0050] In an implementation according to one of the embodiments of the system of present invention the controller circuit of the control box to operate the system in dual mode is configured to switch ON UV lamp by providing supply of electrical power to the at least one high frequency ballast circuit electrically connected to the UV lamp and switch ON the plurality of white light LEDs by providing supply of electrical power to the at least one high efficiency DC driver electrically connected to the plurality of white light LEDs.
[0051] In an implementation according to one of the embodiments of the system of present invention the fan mechanism is electrically connected to and powered by the at least one high efficiency DC driver of the control box and is switched ON by the controller circuit during all operational modes to generate airflow through the at least one enclosure unit.
[0052] In an implementation according to one of the embodiments the method of the present invention, a method for enhanced indoor air quality and lighting includes step of constructing at least one enclosure unit, the enclosure unit having at least one surface section translucent, at least one other inner surface coated with a photo catalytic oxidation (PCO) coating; an air inlet at one end of the at least one enclosure unit; and fan mechanism adapted at the other end of the at least one enclosure unit and configured to generate airflow through the at least one enclosure unit. The method includes step of mounting, a plurality of white light LEDs the at least one enclosure unit on inner surface other than the translucent surface. The method includes step of mounting, at least one UV lamp inside the at least one enclosure unit on inner surface other than the translucent surface. The method includes step of connecting electrically, at least one high frequency ballast circuit to the UV lamp to provide the electrical power and connecting electrically the at least one high frequency ballast circuit to a controller circuit of a control box to receive the power inputs. The method includes step of connecting electrically, at least one high efficiency DC driver to the plurality of white light LEDs to provide the electrical power and connecting electrically the at least one high efficiency DC driver to a controller circuit of a control box to receive the power inputs. Further, the method includes step of connecting electrically, a fan mechanism to at least one high efficiency DC driver of a control box and powering and switching it ON during all operational modes by controller circuit of a control box to generate airflow through the at least one enclosure unit. The method includes step of connecting electrically at least one ON/OFF switch to the control box to provide trigger pulse to the control box for operation mode selection. The method includes step of configuring a controller circuit of a control box to provide selection of the mode with ON/OFF switch trigger based on OFF time delay. The method includes step of operating system in desired/selected mode out of UV mode, lighting mode or dual mode to provide enhanced indoor air quality and lighting.
[0053] In an implementation according to one of the embodiments of the method of present invention the step of configuring a controller circuit of a control box to provide selection of the mode with ON/OFF switch trigger based on OFF time delay includes continuing previous mode if the OFF time is higher than a predefined delay and switching the mode based on set sequence and the previous mode of operation if the OFF time is lower than a predefined delay.
[0054] In an implementation according to one of the embodiments of the method of present invention the step of operating system in desired/selected mode includes operating the system in UV mode by configuring the controller circuit of the control box to switch on UV lamp by providing electrical power to the at least one high frequency ballast circuit electrically connected to the UV lamp and switch OFF the plurality of white light LEDs by terminating supply of electrical power to the at least one high efficiency DC driver electrically connected to the plurality of white light LEDs.
[0055] In an implementation according to one of the embodiments of the method of present invention the step of operating system in desired/selected mode includes operating the system in lighting mode by configuring the controller circuit of the control box to switch OFF UV lamp by terminating supply of electrical power to the at least one high frequency ballast circuit electrically connected to the UV lamp and switch ON the plurality of white light LEDs by providing supply of electrical power to the at least one high efficiency DC driver electrically connected to the plurality of white light LEDs.
[0056] In an implementation according to one of the embodiments of the method of present invention the step of operating system in desired/selected mode includes operating the system in dual mode by configuring the controller circuit of the control box to switch ON UV lamp by providing supply of electrical power to the at least one high frequency ballast circuit electrically connected to the UV lamp and switch ON the plurality of white light LEDs by providing supply of electrical power to the at least one high efficiency DC driver electrically connected to the plurality of white light LEDs.
[0057] In an implementation according to one of the embodiments of the method of present invention the at least one enclosure unit have its inner surfaces other than the translucent surface coated with a photo catalytic oxidation (PCO) coating, the photo catalytic oxidation (PCO) coating a mixture of two phases of TiO2 the Rutile phase and Anatase phase.
[0058] In an implementation according to one of the embodiments of the method of present invention the at least one UV lamp in power on stage activates both the phases, the Rutile phase and Anatase phase of photo catalytic oxidation (PCO) coating. Also, the plurality of white light LEDs in power on stage activates anatase phase of photo catalytic oxidation (PCO) coating.
[0059] In an implementation according to one of the embodiments of the method of present invention the step of operating the system in desired/selected mode includes upon powering, performing microbial disinfection by emission of UVC light and performing by activating the photo catalytic oxidation (PCO) coating, additional microbial disinfection along with volatile organic compounds (VOC) reduction as well as particulate matter reduction.
[0060] In an implementation according to one of the embodiment of the present invention the performance and efficacy exhibited by the system and method thereof of the present invention is as listed below:
Results for Microbial air disinfection, VOC Reduction, PM2.5 and PM 10 for site 1, site 2 and site 3 of 1000 ft3 area
Site Microbial air disinfection VOC Reduction PM2.5
PM10

Site 1 93.1 % in 30 mins From 29 ppm to 18.8 ppm in 8 Hrs From 77 to 38 i.e. 51% in 8 Hrs From 83 to 44 i.e. 47% 8 hrs
Site 2 95.0 % in 30 mins From 29.5 ppm to 20.5 ppm in 8 Hrs From 83 to 46 i.e. 45% in 8 Hrs From 90 to 53 i.e 41% in 8 Hrs
Site 3 90.9 % in 30 mins -- -- --

Microbial Air disinfection in 2.5 hrs for 2000 ft3 room in UV mode, with and without PCO
Mode Microbial air disinfection
UV mode without PCO Microbe Reduction in UV mode without PCO: 59% in 2.5 hrs for 2000 ft3 room
UV mode with PCO Microbe Reduction in UV mode with PCO: 71% in 2.5 hrs for 2000 ft3 room

VOC Reduction in different modes in 8 hrs for 1000 ft3 room
Mode VOC Reduction PM 2.5 PM 10
UV From 30 ppm to 19.7 ppm i.e. 34% reduction From 155 to 79 i.e 49% reduction From 172 to 86 i.e 50% reduction

Lighting From 30 ppm – 24.7 ppm i.e 18% reduction From 151 to 59 i.e 61% reduction From 186 to 91 i.e 51% reduction
UV + Lighting From 30 ppm – 17 ppm i.e. 43% reduction from 146 to 43 i.e. 71% reduction From 158 to 50 i.e. 68% reduction

[0061] The advantageous limitations of the system and method thereof of the present invention includes:
• The existing lighting system can be converted into a lighting and IAQ enhancement system. It can be either used as a down lighter or wall mounted system or false ceiling fitted system as per requirement.
• This system can be used for IAQ enhancement after coupling with the IAQ unit in all the three modes of operation. The IAQ enhancement achieved by the system is less when operated in lighting mode where as it increases when it is operated in UV mode or Dual Mode. In all the three modes of operation it gives IAQ enhancement.
• The system makes use of Fan for passing the air through the IAQ enhancement zone created inside the system which reduces dependency of system on the air circulation or ventilation inside the room.
• The PCO coating when activated by UV gives better IAQ enhancement by reducing VOCs along with PM2.5 and PM 10 count.
• The PCO coating when activated by visible light gives good amount of IAQ enhancement with minimal increase in power consumption.
• The system makes use of high power UVC lamp giving improved efficiency for air disinfection even during human occupancy in the room.

[0062] In some embodiments, the disclosed techniques can be implemented, at least in part, in may be Internet of Things (IoT) mode, by computer program instructions encoded on a non-transitory computer-readable storage media in a machine-readable format, or on other non-transitory media or articles of manufacture. Such computing systems (and non-transitory computer-readable program instructions) can be configured according to at least some embodiments presented herein, including the processes shown and described in connection with Figures.
[0063] Further, while one or more operations have been described as being performed by or otherwise related to certain modules, devices, or entities, the operations may be performed by or otherwise related to any module, device, or entity.
[0064] Further, the operations need not be performed in the disclosed order, although in some examples, an order may be preferred. Also, not all functions need to be performed to achieve the desired advantages of the disclosed system and method, and therefore not all functions are required.

, Claims:We claim:
1. A system (100) for enhanced indoor air quality and lighting, the system (100) comprising:
at least one enclosure unit (8), the enclosure unit (8) having at least one surface section translucent, at least one other inner surface coated with a photo catalytic oxidation (PCO) coating (4) and an air inlet (6) at one end of the at least one enclosure unit (8);
a plurality of white light LEDs (7), the plurality of white light LEDs (7) constituting white light LED lamp;
at least one UV lamp (1), the UV lamp (1) configured to emit UVC light upon excitation through electrical power;
a fan mechanism (5), the fan mechanism (5) adapted at the other end of the at least one enclosure unit (8) and configured to generate airflow through the at least one enclosure unit (8);
a control box (2), the control box (2) comprising at least one high efficiency DC driver configured to provide electrical power to run the fan mechanism (5) and operate and drive the plurality of white light LEDs (7), at least one high frequency ballast circuit to provide electrical power to operate and drive the UV lamp, and a controller circuit to control and provide selection of the mode with an ON/OFF switch trigger based on OFF time delay and operate the system in three modes of operation UV mode, lighting mode and dual mode by controlling the power input to at least one high frequency ballast circuit and the at least one high efficiency DC driver; and
at least one ON/OFF switch, the at least one ON/OFF switch is configured and electrically connected to the control box to provide trigger pulse to the control box for operation mode selection.
2. The system (100) as claimed in claim 1 wherein the at least one enclosure unit (8) is made up of Aluminium extrusion or rectangular tube fabricated using Aluminium sheet or aluminium pipe not limited in shape and form of material used to give the tube form or any other metals such as steel encapsulating a translucent material forming one of the surfaces of the at least one enclosure along the length of the at least one enclosure.
3. The system (100) as claimed in claim 1 wherein the at least one enclosure unit (8) have its inner surfaces other than the translucent surface coated with a photo catalytic oxidation (PCO) coating (4), the photo catalytic oxidation (PCO) coating a mixture of two phases of TiO2 the Rutile phase and Anatase phase.
4. The system (100) as claimed in claim 1 wherein the plurality of white light LEDs (7) are mounted inside the at least one enclosure unit (8) on inner surface other than the translucent surface.
5. The system (100) as claimed in claim 1 wherein the at least one UV lamp (1) is mounted inside the at least one enclosure unit (8) on inner surface other than the translucent surface.
6. The system (100) as claimed in claim 1 wherein the at least one UV lamp (1) in power on stage activates both the phases, the Rutile phase and Anatase phase of photo catalytic oxidation (PCO) coating.
7. The system (100) as claimed in claim 1 wherein the plurality of white light LEDs (7) in power on stage activates anatase phase of photo catalytic oxidation (PCO) coating.
8. The system (100) as claimed in claim 1 wherein the system upon power on performs microbial disinfection by emission of UVC light and performs by activating the photo catalytic oxidation (PCO) coating, additional microbial disinfection along with volatile organic compounds (VOC) reduction as well as particulate matter reduction.
9. The system (100) as claimed in claim 1 wherein the at least one high frequency ballast circuit is electrically connected to the UV lamp (1) to provide the electrical power and electrically connected to the controller circuit of the control box to receive the power inputs.
10. The system (200) as claimed in claim 1 wherein the at least one high efficiency DC driver is electrically connected to the plurality of white light LEDs (7) to provide the electrical power and electrically connected to the controller circuit of the control box to receive the power inputs.
11. The system (100) as claimed in claim 1 wherein the controller circuit of the control box (2) is configured to provide selection of the mode with ON/OFF switch trigger based on OFF time delay wherein previous mode will be continued if the OFF time is higher than a predefined delay and switch the mode based on set sequence and the previous mode of operation if the OFF time is lower than a predefined delay.
12. The system (100) as claimed in claim 1 wherein the controller circuit of the control box (2) to operate the system in UV mode is configured to switch on UV lamp by providing electrical power to the at least one high frequency ballast circuit electrically connected to the UV lamp (1) and switch OFF the plurality of white light LEDs by terminating supply of electrical power to the at least one high efficiency DC driver electrically connected to the plurality of white light LEDs (7).
13. The system (100) as claimed in claim 1 wherein the controller circuit of the control box (2) to operate the system (100) in lighting mode is configured to switch OFF the UV lamp (1) by terminating supply of electrical power to the at least one high frequency ballast circuit electrically connected to the UV lamp (1) and switch ON the plurality of white light LEDs (7) by providing supply of electrical power to the at least one high efficiency DC driver electrically connected to the plurality of white light LEDs (7).
14. The system (100) as claimed in claim 1 wherein the controller circuit of the control box (2) to operate the system (100) in dual mode is configured to switch ON UV lamp by providing supply of electrical power to the at least one high frequency ballast circuit electrically connected to the UV lamp (1) and switch ON the plurality of white light LEDs (7) by providing supply of electrical power to the at least one high efficiency DC driver electrically connected to the plurality of white light LEDs.
15. The system (100) as claimed in claim 1 wherein the fan mechanism (5) is electrically connected to and powered by the at least one high efficiency DC driver of the control box (2) and is switched ON by the controller circuit during all operational modes to generate airflow through the at least one enclosure unit (1).
16. A method for enhanced indoor air quality and lighting, the method comprising:
constructing at least one enclosure unit (8), the enclosure unit (8) having at least one surface section translucent, at least one other inner surface coated with a photo catalytic oxidation (PCO) coating (4); an air inlet (6) at one end of the at least one enclosure unit (8); and fan mechanism (5) adapted at the other end of the at least one enclosure unit (8) and configured to generate airflow through the at least one enclosure unit (8);
mounting, a plurality of white light LEDs (7) the at least one enclosure unit (8) on inner surface other than the translucent surface;
mounting, at least one UV lamp (1) inside the at least one enclosure unit (8) on inner surface other than the translucent surface;
connecting electrically, at least one high frequency ballast circuit to the UV lamp (1) to provide the electrical power and connecting electrically the at least one high frequency ballast circuit to a controller circuit of a control box (2) to receive the power inputs;
connecting electrically, at least one high efficiency DC driver to the plurality of white light LEDs (7) to provide the electrical power and connecting electrically the at least one high efficiency DC driver to a controller circuit of a control box (2) to receive the power inputs;
connecting electrically, a fan mechanism (5) to at least one high efficiency DC driver of a control box (2) and powering and switching it ON during all operational modes by controller circuit of a control box (2) to generate airflow through the at least one enclosure unit (8);
connecting electrically at least one ON/OFF switch to the control box (2) to provide trigger pulse to the control box (2) for operation mode selection;
configuring a controller circuit of a control box (2) to provide selection of the mode with ON/OFF switch trigger based on OFF time delay; and
operating system in desired/selected mode out of UV mode, lighting mode or dual mode to provide enhanced indoor air quality and lighting.
17. The method as claimed in claim 16 wherein the step of configuring a controller circuit of a control box (2) to provide selection of the mode with ON/OFF switch trigger based on OFF time delay includes continuing previous mode if the OFF time is higher than a predefined delay and switching the mode based on set sequence and the previous mode of operation if the OFF time is lower than a predefined delay.
18. The method as claimed in claim 16 wherein the step of operating system in desired/selected mode includes operating the system in UV mode by configuring the controller circuit of the control box to switch on UV lamp (1) by providing electrical power to the at least one high frequency ballast circuit electrically connected to the UV lamp (1) and switch OFF the plurality of white light LEDs (7) by terminating supply of electrical power to the at least one high efficiency DC driver electrically connected to the plurality of white light LEDs (7).
19. The method as claimed in claim 16 wherein the step of operating system (100) in desired/selected mode includes operating the system (100) in lighting mode by configuring the controller circuit of the control box (2) to switch OFF UV lamp (1) by terminating supply of electrical power to the at least one high frequency ballast circuit electrically connected to the UV lamp (1) and switch ON the plurality of white light LEDs (7) by providing supply of electrical power to the at least one high efficiency DC driver electrically connected to the plurality of white light LEDs (7).
20. The method as claimed in claim 16 wherein the step of operating system (100) in desired/selected mode includes operating the system (100) in dual mode by configuring the controller circuit of the control box (2) to switch ON UV lamp (1) by providing supply of electrical power to the at least one high frequency ballast circuit electrically connected to the UV lamp (1) and switch ON the plurality of white light LEDs (7) by providing supply of electrical power to the at least one high efficiency DC driver electrically connected to the plurality of white light LEDs (7).
21. The method as claimed in claim 16 wherein the at least one enclosure unit (8) have its inner surfaces other than the translucent surface coated with a photo catalytic oxidation (PCO) coating (4), the photo catalytic oxidation (PCO) coating a mixture of two phases of TiO2 the Rutile phase and Anatase phase.
22. The method as claimed in claim 16 wherein the at least one UV lamp (1) in power on stage activates both the phases, the Rutile phase and Anatase phase of photo catalytic oxidation (PCO) coating.
23. The method as claimed in claim 16 wherein the plurality of white light LEDs (7) in power on stage activates anatase phase of photo catalytic oxidation (PCO) coating (4).
24. The method as claimed in claim 16 wherein the step of operating the system (100) in desired/selected mode includes upon powering, performing microbial disinfection by emission of UVC light and performing by activating the photo catalytic oxidation (PCO) coating, additional microbial disinfection along with volatile organic compounds (VOC) reduction as well as particulate matter reduction.
Dated this 18th day of August, 2023
Prafulla Wange
(Agent for the applicant)
(IN/PA-2058)