APPARATUS TO PURIFY FRESH AIR USING BIODEGRADABLE FILTER

Abstract

An apparatus to purify fresh air contains at least three types of filters such as high efficient particle filter 5, chemical filter 6 and two stage electrostatic filters 2. The said filters are secured to fresh air unit 1 that is secured to the wall 4 or window 11 of the building. Particularly, the present invention contains low noise fan 7 to reduce noises entering from outside. The said particle filters and chemical filters are either in rolled form or in plate form with protrusions to have effective filtration. More particularly, the present invention relates to an apparatus for purifying freshly supplied air from outdoor environment and recirculates the indoor air by using new type easily installable and serviceable, filters that are environmentally friendly biodegradable filters.

Claims

1. An apparatus to purify fresh air using biodegradable filter comprises: Fresh air unit; Wherein the said fresh air unit comprises of: At least one Housing unit; At least one High efficient particle filter; At least one Chemical filter; Plurality of protrusions; Particle filter media; At least one Two-stage electrostatic filters; One or more Brush type carbon fibers; One or more Grounded frames; At least one Fresh air inlet; At least one Low pressure one way rubber valve; One or more Low noise fans;

2. Apparatus as claimed in claim 1, wherein the said particle filter is either in rolled form or in plate form.

3. Apparatus as claimed in claim 1, wherein the said particle filter media is either conductive, medium conductive, non-conductive or combination of all.

4. Apparatus as claimed in claim 1, wherein the said filter has plurality of protrusions formed on filter film.

5. Apparatus as claimed in claim 1 wherein the said chemical filter is selected from the mixture of several compounds such as activated carbon, impregnated activated carbon, zeolite, sodium bicarbonate etc. having sizes of granulates, that are suitable for gluing without blocking significantly adsorption area.

6. Apparatus as claimed in claim 1, wherein the said two-stage electrostatic filters comprises of corona discharge from brush type carbon fibers that are installed inside grounded frames and collection section media.

7. Apparatus as claimed in claim 1, wherein the said collection section media is either conductive, medium conductive, non-conductive or combination of these.

8. Apparatus as claimed in claim 1, wherein the said low pressure one way rubber air valve is twisted on sides against the said housing, whereas the said air valve opens inside fresh air unit to maintain pressure inside the unit.

9. Apparatus as claimed in claim 1, wherein the said rubber is selected from impermeable material but not limited to halogenated butyl rubber or EDPM rubber.

10. Apparatus as claimed in claim 1, wherein the said low noise fan is selected based on rotation speed, air volumes and pressure difference.

11. Apparatus as claimed in claim 1, wherein the said particle filters and chemical filters are made of environmentally friendly biodegradable materials.

Description

DESCRIPTION OF THE DRAWINGS

[0084] FIG. 1 illustrates the perspective view of fresh air unit affixed to wall or window, according to the present invention.

[0085] FIG. 2 illustrates the sectional view of one way air valve n the housing of the fresh air unit, according to the present invention.

[0086] FIG. 3 illustrates the perspective view fresh air unit affixed to the wall or window with the rolled high efficient particle filter, according to the present invention.

[0087] FIG. 4 illustrates the side view of high efficient particle filter in rolled form and in plate form with the protrusions formed on the filter film, according to the present invention.

[0088] FIG. 5 illustrates the sectional view of the high efficiency particle filter in plate form according to the present invention.

[0089] FIG. 6 illustrates the diagonal view of arrangement of high efficiency particle filter with chemical filter, according to the present invention.

[0090] FIG. 7 illustrates the side view of high efficiency particle filter with chemical filter film secured at its bottom, according, to the present invention.

[0091] FIG. 8 illustrates the rolled mode of high efficiency particle filter, according to the present invention.

[0092] FIG. 9 illustrates the sectional view of arrangement of brush type carbon fibers and grounded frames in circular plate, according to the present invention.

[0093] FIG. 10 illustrates the sectional view of arrangement of brush type carbon fibers and grounded frames in square plate, according to the present invention.

[0094] The figures constitute a part of this specification and include illustrative embodiments of the present invention and illustrate various objects and features thereof. Further, the figures are not necessarily to scale, some features may be exaggerated to show details of particular components. In addition, any specifications and the like shown in the figures are intended to be illustrative, and not restrictive. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0095] The present invention will be apparent from the following detailed description, which proceeds with reference to the accompanying drawing, wherein the same references relate to the same elements.

[0096] In general, the subject matter of the present invention is directed to an apparatus to purify fresh air. Specifically, the apparatus contains fresh air unit with biodegradable filters secured to it. Particularly, the present invention contains three types of filters such as two stage electrostatic filters, high efficiency particle filter 5 and chemical filters 6. The said filters are either in rolled form or in plate form. The said filter has plurality of protrusions with equal size and space between them. The present invention has open installation surface secured to air inlet valve 14 of wall 4 or window 11. The said fresh air unit 1 contains low pressure one way rubber valve 14 secured to housing. More particularly, the present invention contains fans 7 with low noise that enable the usage of the invention even at night times, when carbon dioxide levels are highest in bedrooms.

[0097] With reference to FIG. 1, the present invention contains fresh air unit 1 of various shapes but not limited to cube, cuboid, square pyramid, cone, triangular prism, triangular pyramid, cylinder and sphere or there combinations. The said fresh air unit 1 intakes the air, especially the fresh air for purification from outdoor, having air volume normally between 5-20 I/s (18-72 m3/h) per person that is depending on usage of facilities and national standards and it can be mixed with re-circulated air with an adjustable re-circulation rate.

[0098] In one embodiment of the present invention, wherein the said apparatus as referred in FIG. 2 contains housing unit secured to fresh air unit 1. The said housing consists of low pressure one way rubber air valve arrangement that is designed for automatic re-circulating of air rate without any manually or electrically driven valves or dampers. Air flow direction in fresh air unit 1 is from outside to inside. The rubber of one way air valve 14 is twisted on sides against housing, thus one way air escape valve 14 open inside fresh air unit 1 as soon as the pressure inside the unit exceeds adjusted pressure. The said rubber is made from impermeable material but not limited to halogenated butyl rubber and EDPM rubber.

[0099] In another embodiment of the present invention, wherein the said unit has maintenance free charger that is executed by brush type carbon fibers 8, installed permanently to unit's air intake for giving uniformly corona discharge to the intake air, both for fresh and re-circulated ones.

[0100] In yet another embodiment, the present invention contains fans 7 and based on fans rotation speed, air volumes and pressure difference, one way air valves 14 rubber sensitiveness (flexibility and thickness) is designed to adjust automatically with targeted fresh and re-circulated air rates.

[0101] In one preferred design of the present invention, as referred in FIGS. 3 to 10, the said fresh air unit 1 contains three types of filters such as two way electrostatic filter, high efficiency particle filter 5 and chemical filter. Based on the gaseous form of pollutants that are required to be filtered, the said filters are selected from mixture of several compounds such as activated carbon, impregnated activated carbon, zeolite, sodium bicarbonate etc. having size of granulates, that are suitable for gluing without blocking significantly adsorption area.

[0102] In another preferred design of the present invention, wherein the said fresh air unit 1 comprises of high efficiency particle filter 5 and chemical filter, for purifying particle and gaseous contaminants. The said particle filter sheet and chemical filter sheet are fixed together in adjacent position. These filters are either in rolled or in plate form 15. Particle filter media is either conductive, medium conductive, non-conductive or combination of these. The said filters have plurality of protrusions 16 formed on filter film systematically with equal sizes and distance between them to have intended gap between filter film layers. This leads even distribution of dust particle inside filter media and whole surface of the filter have high loading capacity.

[0103] Based on the need of the width of carbon bed, granulates are mixed with required amount to form glue and the process is based on heating (time and temperature). After heating with certain temperature and time, activated carbon granulates transform to required form with low pressure, hence enabling the use in required form, size and position inside air purifier.

[0104] In one embodiment of the present invention, the filter used is at least two-stage electrostatic filter 2 with corona discharge from brush type carbon fibers 8 that are secured to grounded frames 9 and collection section media which is either conductive, medium conductive, non-conductive or combination of these. The present invention uses 5-10 kV corona discharger when using in normal household fresh air arrangement and 7-50 kV corona discharger when using in mechanical ventilated buildings air handling units. Charged air that flows through the filter is at least 1 kV charged before reaching collection section. This provides high electric field on collection filter film, even it is fully covered by ultrafine and fine particles. This also provides high filtration efficiency even air velocity inside filter media increases.

[0105] In another embodiment of the present invention, the said open installation surface is secure to air inlet 10, fixed in wall 4 or window 11 and its frames 12 or other surfaces and their structures, but limited to display housing size of the invention. The said open installation surface is designed to fit the thickness of the wall 4 or other structures without any extra arrangement for installation.

[0106] The present invention uses existing pipe(s) of the building for securing to wall 4 or window 11 while bringing fresh air from outdoor to indoor. It provides continuously flow of fresh air from outdoor, thus protecting people against carbon monoxide poisoning. It also uses existing liquid pipes that are installed for spilt air conditioning unit. These pipes can be used even they are partly filled with other components like insulated pipes/hoses. This provides the easy installation of the invention without making any new holes to the buildings. The present invention is design to act as active noise insulation unit 13 preventing outdoor noises to access through it to indoor.

Advantages:

[0107] Fresh air and recirculated air filtration is efficient solution to dilute formaldehyde level present inside the building.

[0108] The said filters efficiently filters ozone from fresh and re-circulated air with its low pressure drop and high efficiency chemical filter.

[0109] The present invention has efficient particle and chemical filter to prevent NO.sub.2 from entering inside through fresh air inlet and filter it through re-circulated air.

[0110] The present invention has efficient chemical filter to prevent SO.sub.2 from entering inside through fresh air inlet, thus it purifies SO.sub.2 from re-circulated air.

[0111] The said invention efficiently filters VOC's from fresh and re-circulated air with its low pressure drop and high efficiency chemical filter.

[0112] The said invention efficiently filters particulate matters from fresh and re-circulated air with its low pressure drop and high efficient environment friendly biodegradable disposable filters.

[0113] The present invention is designed to reduce noise from outside by providing small openings.

[0114] The said invention can be used in naturally and mechanically ventilated buildings.

[0115] Although the invention has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternative embodiments, will be apparent to persons skilled in the art. It is, therefore, contemplated that the appended claims will cover all modifications that fall within the true scope of the invention.