WO2021181152A1

WO2021181152A1 - System and method for purifying air through natural means

Info

Publication number: WO2021181152A1
Application number: PCT/IB2020/058605
Authority: WO
Inventors: Shashikumar R; Nidhi Rana
Original assignee: Shashikumar R; Nidhi Rana
Priority date: 2020-03-10
Filing date: 2020-09-16
Publication date: 2021-09-16

Abstract

A system for purifying air through natural means includes a filter bed to grow plants with roots to receive airflows pollutants and arrests a first set of pollutants. The system then includes a filter membrane made of a fibrous structure that receives airflows from filter bed and arrests a second set of pollutants. The system also includes an air propulsion mechanism that propels the indoor airflow through the filter bed and the filter membrane. The system then includes a UV chamber connected to the air propulsion mechanism that receives the airstreams from the filter membrane and disinfects the airstreams from a third set of pollutants from the airstreams. The system further includes an IOT based system to control the air propulsion mechanism and UV chamber and a user interface to display pollution level, various activity and status of components.

Description

SYSTEM AND METHOD FOR PURIFYING AIR THROUGH NATURAL MEANS

This complete specification seeks priority from provisional application number 202041010261 filed on 10^thday of March, 2020 with title “SYSTEM AND METHOD FOR PURIFYING AIRTHROUGH NATURAL MEANS”

FIELD OF THE INVENTION

This invention relates, generally, to the field of purification of air, more specifically the invention relates to purifying air by natural means like plants.

BACKGROUNDOF THE INVENTION

[0001] Generally, people spend more than 90 percent of their time indoors, where they are exposed to indoor air quality. In such cases, indoor air quality helps them relax and keep them healthy. Mostly, indoor air contains tiny microbe sized items that can have numerous and diverse effects on our health once inhaled into the body. These to a growing number of health-threatening indoor pollutants. These pollutants can be categorized into three groups: biological contaminants, such as bacteria, viruses and molds; toxic gases and fumes given off by furniture, carpeting, etc.; and particulates, such as dust and smoke.

[0002] Most of the office buildings are configured with contaminated heating, ventilation and air conditioning (HVAC) systems. Any negligence in maintenance of such HVAC systems can convert such systems as a hotbed for the growth of molds and bacteria, regardless of the age of the building. Occupants of these buildings can be expected to suffer from symptoms related to exposure to these health-threatening indoor pollutants. The problem of health-threatening indoor pollutants is exacerbated when the building is a health facility where not only are there a greater number of harmful health-threatening pollutants present, but occupants of the health facility may be more susceptible to maladies caused by these health-threatening pollutants.

[0003] A known solution for above mentioned problem is HEPA air purifiers, High Efficiency Particulate Air Purifiers were developed back in the 1940s. HEPA filters filter out bacteria, chemicals, and viruses to create a more sanitary living environment. Such filtered particles remain trapped in the filter decreasing effectiveness of HEPA filters over time. Mostly HEPA filters are supposed to be replaced every two years. Generally, HEPA filters uses three steps to prevent particulate matter from passing through. The smallest particles experience known as diffusion, which is when particulate matter becomes trapped by gas particles and the fibers. Secondly, slightly larger particles stick to the fibers upon contact known as interception. Larger particles go through impaction, where they collide with the fibers and become stuck within them. However, HEPA filters are inefficient to remove odors, chemicals, or gases.

[0004] Another known solution are Ionizers, also known as negative ion air purifiers that rely on chemical injection to purify the air. Ions are naturally occurring particles that have either positive or negative charges. Negative ions can attack pollen and dust like a magnet. Once the ion is weighed down by the particulate matter, it gets stuck to the ground or wall.

[0005] However, ionizers in many cases are proved to be ineffective as instead of cleaning the air, it often mask smells and visible particulate matter. Since ionizers are not capable of absorbing or eliminating harmful particles, it moves such particles from air to walls, and hence exposing the occupants.

[0006] Yet another known solution is activated carbon. Activated carbon is porous and can absorb large amounts of pollutants, from chemicals to gases, smoke, and odors. And once a pollutant is absorbed, it is captured forever. However, activated carbon is not extremely effective in addressing particulate matter and allergens.

[0007] All the above solution the problem discussed generates e-waste and require high maintenance. Hence, there is a critical need to improve the air quality of inhabited areas that utilizes lower maintenance without any e-waste.

SUMMARY OF THE INVENTION

[0008] The following description is a complete disclosure and therefore lays down the aspects of the solution being proposed. A person skilled in the art would appreciate that this complete specification may comprise one or more elements and sub - elements thereof, including but not limited to, routines, methods, processes, operations, systems, apparatuses and devices, whether named or unnamed, without deviating from the scope of this complete application. Those skilled in the art would also appreciate that the invention disclosed in this complete application may be carried out by methods and/ or through systems which are equivalent to the solution disclosed in this complete application, and therefore any definition/ description of the said equivalents in the complete specification should be construed as being amply covered in the complete specification. [0009] The present invention is intended to address at least one of the abovementioned problems and/ or disadvantages and to provide a suitable solution. Accordingly, an aspect of the present invention is to provide system and method for purifying air through natural means.

[0010] In accordance with an aspect of the present invention, a system for purifying air through natural means is provided. The system includes a filter bed configured to grow plants with roots through a growing medium such that the roots receive - airflows with a first set of pollutants, a second set of pollutants and a third set of pollutants and arrests a first set of pollutants from the airflows. In an embodiment the first set of pollutants includes volatile organic compounds and/or fine-particulate and/or odor in air. The system then includes a filter membrane made of a fibrous structure configured to receive the airflows from the filter bed such that the filter membrane arrests the second set of pollutants that has passed through the filter bed. In an embodiment, the second set of pollutants includes particulate matter 2.5 pollutants in air. The system also includes an air propulsion mechanism with one or more fans, connected to the surface of the filter membrane propels the indoor, airflow through the filter bed and the filter membrane. The system then includes an ultraviolet light chamber connected to the air propulsion mechanism receives the airstreams from the filter membrane and disinfects the airstreams from a third set of pollutants from the airstreams. In an embodiment, the third set of pollutants includes viruses and/or germs and/or other microorganisms in air. The system further includes an IOT based system configured to control the air propulsion mechanism and the ultraviolet light chamber. In an embodiment the IOT based system includes one or more sensors coupled with a microprocessor so that the IOT based system. In an embodiment, the IOT based system detects water level and a nutrition level of the filter bed and initiates delivery of water or/and nutrition if the water level or/and the nutrition level decreases, detects requirement of a grow lamp for the plants and controls power level of the grow lamp, detects volume of indoor space and/or occupants and initiates required number of fan in the air propulsion mechanism, detects pollution level of indoor and initiates the system if required else initiates a power saving mode if air purification is not required and detects requirement of maintenance or replacement of one or more component of the system and triggers replacement or maintenance request. The system furthermore includes a user interface communicably connected to the IOT system and configured to display pollution level, various activity and status of components.

[0011] In an embodiment of the present invention, the system also includes a reservoir for containing water for watering the growing plants. The system further includes a drip irrigation system connected to the reservoir, for supplying water to the growing plants in the filter bed. The system furthermore includes an ultraviolet disinfection system connected to the reservoir. In an embodiment, the ultraviolet disinfection system and the drip irrigation system is controlled by the IOT based system.

[0012] In accordance with an aspect of the present invention, a method for purifying air through natural means is provided. The Method includes receiving a plurality of airflows on a filter bed comprising plant roots and on a filter membrane, wherein the plant roots in the filter bed arrests a first set of pollutants in the airflow and the filter membrane arrests a second set of pollutants. In an embodiment the first set of pollutant includes volatile organic compounds and/or fine-particulate and/or odor in air and the second set of pollutant includes particulate matter 2.5 pollutants in air. The method then includes initiating one or more fans in an air propulsion mechanism for propelling the airflows through the filter bed upon detecting an active source of airflow. The method further includes disinfecting the airflow received from the filter membrane to arrest a third set of pollutants from the airstream by activating an ultraviolet light chamber which is connected to the air propulsion mechanism. In an embodiment, the third set of pollutants includes viruses and/or germs and/or other microorganisms in air. The method also includes controlling the system by an IOT based system. In an embodiment, the IOT based system operates at least one control function of detecting water level and a nutrition level of the filter bed and initiates delivery of water or/and nutrition if the water level or/and the nutrition level decreases, detecting requirement of a grow lamp for the plants and controls power level of the grow lamp, detecting volume of indoor space and/or occupants and initiates required number of fan in the air propulsion mechanism, detecting pollution level of indoor and initiates the system if required else initiates a power saving mode if air purification is not required and detecting maintenance or replacement requirements of one or more component of the system and triggering respective request. The method further includes displaying pollution level, various activity and status of components of the system through a user interface which is communicably connected to the IOT system.

[0013] Other aspects, advantages and salient features of the invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses exemplary embodiments of the invention.

BRIEF DESCRIPTION OF DRAWINGS [0014] The above and other aspects, features and advantages of certain exemplary embodiments of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0015] Fig. 1 illustrates a high level block diagram of a preferred embodiment of the claimed system wherein plants and filter bed arrests a first set of pollutants,

[0016] Fig. 2 illustrates a block diagram of a preferred embodiment of the claimed system ,

[0017] Fig. 3 illustrates a block diagram of a preferred embodiment of the claimed system wherein IOT based system manages and controls the claimed system,

[0018] Fig. 4 illustrates a high-level flow chart of a non-limiting, exemplary embodiment of a method for purifying air by natural means, and

[0019] Fig. 5 provides a flow chart of a non-limiting, exemplary embodiment of the claimed method wherein the IOT based system controls and manages the claimed system .

[0020] Persons skilled in the art will appreciate that elements in the figures are illustrated for simplicity and clarity and may have not been drawn to scale. For example, the dimensions of some of the elements in the figure may be exaggerated relative to other elements to help to improve understanding of various exemplary embodiments of the present disclosure.

DETAILED DESCRIPTION [0021] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. In addition, descriptions of well- known functions and constructions are omitted for clarity and conciseness.

[0022] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the invention. Accordingly, it should be apparent to those skilled in the art that the following description of exemplary embodiments of the present invention are provided for illustration purpose only and not for the purpose of limiting the invention as defined by the appended claims and their equivalents.

[0023] It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a component surface” includes reference to one or more of such surfaces.

[0024] Fig. 1 to Fig. 5, discussed below, is non-limiting illustrations which may be used to explain and describe the invention used to explain and describe the invention disclosed herein. Persons skilled in the art will appreciate that the purpose of these figures is to provide clarity on the concepts associated with the various technical embodiments of this invention. These figures may include block diagrams and/or flowcharts and/or other simplistic representations and may not always indicate the real time operations taking place in the invention.

[0025] Accordingly, Fig. 1 illustrates a high level block diagram of a preferred embodiment of the claimed system wherein plants and filter bed arrests a first set of pollutants, 100. In an aspect of the present invention, a plant is selected on a basis of its properties to purify air. Preferably, plant having properties of purifying air and with big roots are considered, however, the system is configured to use any plants with the properties of air purification.

[0026] The plant is fixed in a manner that air flows 110 through its leaves and stems arresting one part of first set of pollutants 120 and then the air flows to its root where the other part of first set of pollutants are arrested 130. The system is configured in a manner that only air that has passed through the leaves and stems of the plant leaving one part of first set of pollutants 120 and then it has passed through plant’s root leaving other part of first set of pollutants 130 is allowed to go to next step of purification. In an embodiment the first set of pollutants includes volatile organic compounds and/or fine- particulate and/or odor in air.

[0027] Fig. 2 illustrates a block diagram of a preferred embodiment of the claimed system 200, In accordance with an aspect of the present invention, a system for purifying air through natural means is provided. The system includes a filter bed 210 configured to grow plants with roots through a growing medium such that the roots receive plurality of airflows with pollutants and arrests the first set of pollutants from the airflows. The system then includes a filter membrane 220 made of a fibrous structure configured to receive the airflows from the filter bed 210 such that the filter membrane 220 arrests a second set of pollutants that has passed through the filter bed 210. In an embodiment, the second set of pollutants includes particulate matter 2.5 pollutants in air. The system also includes an air propulsion mechanism 230 with one or more fans, connected to the surface of the filter membrane 220 propels the indoor, airflow through the filter bed 210 and the filter membrane 220. The system then includes an ultraviolet light chamber 240 connected to the air propulsion mechanism 230 receives the airstreams from the filter membrane 220 and disinfects the airstreams from a third set of pollutants from the airstreams. In an embodiment, the third set of pollutants includes viruses and/or germs and/or other microorganisms in air. The system further includes an IOT based system configured to control the air propulsion mechanism 230 and the ultraviolet light chamber 240 and includes one or more sensors coupled with a microprocessor. In an embodiment, the IOT based system detects water level and a nutrition level of the filter bed 210 and initiates delivery of water or/and nutrition if the water level or/and the nutrition level decreases, detects requirement of the grow lamp 290 for the plants and controls power level of the grow lamp 290, detects volume of indoor space and/or occupants and initiates required number of fan in the air propulsion mechanism 230, detects pollution level of indoor and initiates the system if required else initiates a power saving mode if air purification is not required and detects requirement of maintenance or replacement of one or more component of the system and triggers replacement or maintenance request. The system furthermore includes a user interface 250 communicably connected to the IOT system and configured to display pollution level, various activity and status of components.

[0028] In an embodiment of the present invention, the system also includes a reservoir 260 for containing water for watering the growing plants. The system further includes a drip irrigation system 270 connected to the reservoir, for supplying water to the growing plants in the filter bed 210. The system furthermore includes an ultraviolet disinfection system 280 connected to the reservoir. In an embodiment, the ultraviolet disinfection system 280 and the drip irrigation system 270 is controlled by the IOT based system.

[0029] In one embodiment, the said IOT based system controls the removal of microbial organism from the water in the reservoir 260 by periodically circulating the water through the ultraviolet disinfection system and also controls frequency of circulation of the water through the ultraviolet disinfection system based on concentration of microbial organisms in the water. In other embodiment, the said IOT based system controls the water flow into the filter bed 210 by selectively activating the drip irrigation system 270.

[0030] In one other embodiment, the system includes the grow lamp 290 for providing light to said at least one plant, the grow plant 290 includes at least one light emitting diode (LED), wherein the grow lamp 290 is controlled by the IOT based system.

[0031] In other embodiment, the said filter membrane 220 is further configured wherein the fibrous structure is capable therefrom to restrict sound from the air propulsion system.

[0032] In one other embodiment, the said IOT based system is further configured to detect and auto-learn usage of the system based on factors comprising time of a day, historical data of usage, actuation by a user, occupancy rate and value of air pollution. [0033] In yet another embodiment, the said filter membrane 220 rejects indoor airflow that has not passed through filter bed.

[0034] Fig. 3 illustrates a block diagram of a preferred embodiment of the claimed system wherein IOT based system manages and controls the claimed system 300, In accordance with an aspect of the present invention the system to purify air by natural means 310 has a user interface 320 that displays pollution level, status of components and activities of the system 310. In an embodiment, the system 310 can be controlled by the user interface 320.

[0035] In a preferred embodiment, the user interface display 320 is communicably connected to IOT based system 330 to provide status of the system 310, and components of the system 310 which can be monitored by a remote user by a hand held device 340a, 340c or a processor 340b. In one other embodiment, the remote user can provide input via hand held device 340a, 340c or the processor 340b to control any component or whole system 310.

[0036] In yet another embodiment, the user interface 320 provides information in case there is a replacement or maintenance requirement of the system 310 to IOT based system 330 which in turn can alert responsible person to take action of such repair or maintenance requirement.

[0037] Fig. 4 illustrates a high-level flow chart of a non-limiting, exemplary embodiment of a method for purifying air by natural means. In accordance with an aspect of the present invention, a method 400 for purifying air through natural means is provided. At step 410 a plurality of airflows is received on a filter bed comprising plant roots and on a filter membrane, wherein the plant roots in the filter bed arrests a first set of pollutants in the airflow and the filter membrane arrests a second set of pollutants at step 420. In an embodiment the first set of pollutant includes volatile organic compounds and/or fine-particulate and/or odor in air and the second set of pollutant includes particulate matter 2.5 pollutants in air. At step 430 at least one fan in an air propulsion mechanism is initiated for propelling the airflows through the filter bed upon detecting an active source of airflow. Then at step 440 the airstreams received from the filter membrane is disinfected to arrest a third set of pollutants from the airstream by activating an ultraviolet light chamber which is connected to the air propulsion mechanism. In an embodiment, the third set of pollutants includes viruses and/or germs and/or other microorganisms in air. In a preferred embodiment, the system is controlled by an IOT based system. In an embodiment, the IOT based system includes one or more sensors coupled with a microprocessor and operates at least one control function of detecting water level and a nutrition level of the filter bed and initiates delivery of water or/and nutrition if the water level or/and the nutrition level decreases, detecting requirement of a grow lamp for the plants and controls power level of the grow lamp, detecting volume of indoor space and/or occupants and initiates required number of fan in the air propulsion mechanism, detecting pollution level of indoor and initiates the system if required else initiates a power saving mode if air purification is not required and detecting maintenance or replacement requirements of one or more component of the system and triggering respective request. At step 450 pollution level, various activity and status of components of the system are displayed through a user interface which is communicably connected to the IOT system. [0038] In a preferred embodiment, water is delivered to filter bed through a drip irrigation system, wherein the water is fed from a reservoir. The drip irrigation system is controlled through the IOT based system.

[0039] In one embodiment, water is disinfected periodically through an ultraviolet disinfection system. The frequency of circulation of water through the ultraviolet disinfection system is determined on basis of concentration of microbial organisms in the water.

[0040] In one other embodiment, speed of fan in the air propulsion mechanism is controlled upon detection of the active source of airflow.

[0041] In one other embodiment, a grow lamp is controlled through IOT based system to provide light to said at least one plant by at least one light emitting diode (LED)

[0042] In yet another embodiment, indoor airflow is rejected if it has not passed through the filter bed.

[0043] In a preferred embodiment, IOT based system is used to control operation of at least one control function to detect and auto-learn the plurality of airflows based on the time of the day or detect and auto-learn the plurality of airflows based on historical data of system use or detect and auto-learn the plurality of airflows based on actuation by a user or detect and auto-learn the plurality of airflows based on occupancy; and/or detect and auto-learn the plurality of airflows based on air pollution count.

[0044] Fig. 5 provides a flow chart of a non-limiting, exemplary embodiment of the claimed method wherein the IOT based system controls and manages the claimed system 500. In an aspect of the present invention an IOT based system 510 controls various operations of the said system.

[0045] In an embodiment, in case the IOT based system 510 detects low level of water or nutrition in one or more filter bed at step 520 the IOT based system 510 initiates delivery of water or nutrition to those filter bed through drip irrigation system at step 525.

[0046] In one embodiment, if the IOT based system 510 identifies that any one or more plant requires light energy for grown at step 530 then the IOT based system 510 controls power level of grow lamps at step 535 such that optimum light is provided to said one or more plant for proper growth of the plant.

[0047] In one other embodiment, the IOT based system 510, detects volume of indoor space and occupants of the indoor space at step 540 and select mode of the system accordingly at step 545. For a non-limiting example, if the indoor space has less number of occupants at step 540, then IOT based system 510 powers on less number of fans in air propulsion mechanism at step 545 to save power, if the indoor space has more occupants at step 540 then the IOT based system 510 enables all or maximum fan in the air propulsion mechanism at step 545 and in case there are no occupants in the indoor space at step 540 then the IOT based system 510 enables stand-by mode to save power at step 545.

[0048] In yet another embodiment, the IOT based system 510 detects pollution level at step 550 and selects system mode accordingly at step 555. For a non-limiting example, if the IOT based system 510 detects that there is no air pollution at step 550 then the IOT based system 510 enable stand-by mode to save power at step 555, in case the IOT based system 510 detects less air pollution at step 550 then the IOT based system 510 enables power mode of the system by enabling only few fans that are required to purify polluted air at step 555 and if the IOT based system 510 detects high level of air pollution at step 550 then it activates all fans to process the system in full throttle at step 555.

[0049] In a preferred embodiment, the IOT based system 510 detects a requirement of maintenance or replacement of one or more component of the system at step 560 then it raises a request for such maintenance or replacement executive at step 565. In a non-limiting example, the IOT based system detects a replacement requirement if there is a fused grow lamp by continuously checking power on the grow lamp, if there is a jammed filter membrane by continuously checking power load in each fan of the air propulsion mechanism requirement to change.

[0050] In an embodiment of the invention, filter membrane can be replaced easily by pluck, remove and insert mechanism. In one other embodiment, the filter membrane are made of non-woven fiber so that it is cheaper and easily disposable without creating any electronic or non-disposable waste.

[0051] While the invention has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

[0052] In relation to the preceding specification, it is reiterated that the present disclosure and its advantages have been described with reference to exemplary embodiments and that, a person of ordinary skill in the art would appreciate that various modifications and changes may be made, without departing from the scope of the present disclosure, as set forth in the appended claims and their equivalents. Furthermore, it is re-emphasized that the preceding specification and figures are to be regarded as illustrative examples of the present disclosure, rather than in restrictive sense. All such possible modifications are intended to be included within the scope of the present invention.

Claims

I/We Claim:

1 . A system to purify air by natural means, wherein the system comprises: a filter bed 210 configured to grow plants with roots through a growing medium such that the roots receive airflows with pollutants and arrests a first set of pollutants from the airflows, wherein the first set of pollutants are volatile organic compounds and/or fine-particulate and/or odor in air; characterized by: a filter membrane 220 made of a fibrous structure configured to receive the airflows from the filter bed 210 such that the filter membrane 220 arrests a second set of pollutants that has passed through the filter bed 210, wherein the second set of pollutants are particulate matter 2.5 pollutants in air; an air propulsion mechanism 230 with one or more fans, connected to the surface of the filter membrane 220 propels the indoor, airflow through the filter bed 210 and the filter membrane 220; an ultraviolet light chamber 240 connected to the air propulsion mechanism 230 receives the airstreams from the filter membrane 220 and disinfects the airstreams from a third set of pollutants from the airstreams, wherein the third set of pollutants are viruses and/or germs and/or other microorganism in air; an IOT based system 330 configured to control the air propulsion mechanism 230 and the ultraviolet light chamber 240; wherein the: detects water level and a nutrition level of the filter bed 210 and initiates delivery of water or/and nutrition if the water level or/and the nutrition level decreases; detects requirement of a grow lamp 290 for the plants and controls power level of the grow lamp 290; detects volume of indoor space and/or occupants and initiates required number of fans in the air propulsion mechanism; detects pollution level of indoor and initiates the system if required else initiates a power saving mode if air purification is not required; and detects requirement of maintenance or replacement of one or more component of the system and triggers replacement or maintenance request; and a user interface 250 communicably connected to the IOT based system 330 and configured to display pollution level, various activity and status of components.

2. The system as claimed in Claim 1 , wherein the system comprises:

A reservoir 260 for containing water for watering the growing plants; a drip irrigation system 270 connected to the reservoir 260, for supplying water to the growing plants in the filter bed 210; an ultraviolet disinfection system 280 connected to the reservoir260; wherein, the ultraviolet disinfection system 280 and the drip irrigation system 270 is controlled by the IOT based system.

3. The system as claimed in Claim 1 , wherein, the said IOT based system 330 controls the removal of microbial organism from the water in the reservoir 260 by periodically circulating the water through the ultraviolet disinfection system 280 and also controls frequency of circulation of the water through the ultraviolet disinfection system 280 based on concentration of microbial organisms in the water.

4. The system in Claim 2, wherein, the said IOT based system 330 controls the water flow into the filter bed 210 by selectively activating the drip irrigation system 270.

5. The system as claimed in Claim 1, wherein the system has a grow lamp 290 for providing light to said at least one plant, comprising at least one light emitting diode (LED), wherein the grow lamp 290 is controlled by the IOT based system.

6. The system as claimed in Claim 1, wherein, the said filter membrane 220 is configured wherein the fibrous structure is capable therefrom to restrict mechanical sound generated while running the air propulsion system.

7. The system as claimed in Claim 1 , wherein, the said IOT based system 330 is configured to detect and auto-learn usage of the system based on factors comprising time of a day, historical data of usage, actuation by a user, occupancy rate and value of air pollution.

8. The system as claimed in Claim 1; wherein, the said filter membrane 220 rejects indoor airflow that has not passed through filter bed 210.

9. A method for purifying air by natural means, wherein the method comprising steps of: receiving a plurality of airflows on a filter bed 210 comprising plant roots and on a filter membrane 220, wherein the plant roots in the filter bed 210 arrests a first set of pollutants in the airflow and the filter membrane 220 arrests a second set of pollutants, wherein the first set of pollutants are volatile organic compounds and/or fine-particulate and/or odor in air and the second set of pollutants are particulate matter 2.5 pollutants in air; initiating at least one fan in an air propulsion mechanism 230 for propelling the airflows through the filter bed 210 upon detecting an active source of airflow; disinfecting the airstreams received from the filter membrane 220 to arrest a third set of pollutants from the airstream by activating an ultraviolet light chamber 240 which is connected to the air propulsion mechanism, wherein the third set of pollutants are viruses and/or germs and/or other microorganism in air; controlling the system by an IOT based system, wherein the IOT based system330 operates at least one control function of: detecting water level and a nutrition level of the filter bed 210 and initiates delivery of water or/and nutrition if the water level or/and the nutrition level decreases; detecting requirement of a grow lamp 290 for the plants and controls power level of the grow lamp 290; detecting volume of indoor space and/or occupants and initiates required number of fan in the air propulsion mechanism; detecting pollution level of indoor and initiates the system if required else initiates a power saving mode if air purification is not required; and detecting maintenance or replacement requirements of one or more component of the system and triggering respective request; and displaying pollution level, various activity and status of components of the system through a user interface 250 which is communicably connected to the IOT based system.

10. The method as claimed in Claim 9, wherein the method comprising step of delivering water to the filter bed 210 through a drip irrigation system 270 fed from a reservoir 260, wherein the drip irrigation system 270 is controlled through the IOT based system.

11. The method as claimed in Claim 10, wherein the method has step of disinfecting the water through periodic circulation through an ultraviolet disinfection system.

12. The method as claimed in Claim 10, wherein the method has step of determining the frequency of circulation of water through the ultraviolet disinfection system 280 based on concentration of microbial organisms in the water.

13. The method as claimed in Claim 10, wherein the method has step of controlling the flow of the water to the filter bed 210 by selectively activating the drip irrigation system 270.

14. The method as claimed in Claim 9, wherein the method has step of controlling of the speed of one or more fan in the air propulsion mechanism 230 upon detection of an active source of airflow.

15. The method as claimed in claim 9, wherein the method comprising step of rejecting indoor airflow that has not passed through the filter bed 210.