Claims:We Claim;

1. Present improved evaporative air cooler 1, wherein said evaporative air cooler comprises of;
• Pad Assembly 3,
• Evaporative Pad 4,
• Nano filter 5,
• Water Tank 6,
• Centrifugal Fan 7,
• Centrifugal Fan Housing8,
• Motor 9,

wherein;

said pad assembly 3 consists of an evaporative pad 4, and is arranged such that it provides a large surface area for the evaporation of water; said pad assembly 3 further consists of nano filter 5; said nano filter 5, made up of nano resins is located within tank; said centrifugal fan assembly 8accommodates centrifugal fan 7.

2. An improved evaporative air cooler 1, as claimed in claim 1, wherein said nano filter5 is made up of nano resins and cellulose fibre and is located in the path of water circulation, or kept within water tank 6.

3. An improved evaporative air cooler 1, as claimed in claim 1 and 2, wherein said evaporative pad 4 is made up of fibrous absorbent material that includes aspen fibre, cellulose fibre honeycomb pads.

Dated this 1st Day of August, 2017.

Gopi J Trivedi (Ms)
Authorized Agent of Applicant

To,
The controller of Patents
The Patent Office
At Mumbai
, Description:FORM – 2

THE PATENTS ACT, 1970
(39 of 1970)

COMPLETE SPECIFICATION
(SECTION 10; RULE 13)

“An Improved Evaporative Air Cooler”

Symphony Limited,
A Company Incorporated under the Indian Companies Act
having address at
Symphony house FP-12-TP-50 Bodakdev, Off S. G. Highway, Ahmedabad, Gujarat, India-380054

The following specification particularly describes the invention and the manner in which it is to be performed: -

FIELD OF INVENTION:
The present invention relates to an improved evaporative air cooler.In particular the present invention provides an improved evaporative air cooler which provides purified, fresh, cool air through purification and evaporation of purified water. Said invention thereby utilizes less water and eliminates the need to change the water in the cooler frequently.

BACKGOUND OF INVENTION:

The air pollution has become quite severe globally, many hazardous substances and pollutants, volatile organic compounds, microbial matter, formaldehyde, dust, mites, which are harmful to the human body are contained in the polluted air. When air containing such hazardous substances and pollutant dust, harmful to the human body, is ingested without any filtration, it causes various adverse effects on the human body which is mainly affecting the respiratory system and cardiovascular system damage, including respiratory irritation, coughing, breathing difficulties, reduced lung function, aggravate asthma, cause chronic bronchitis, arrhythmia, nonfatal heart attack, lung and heart disease, also leading to premature death.

In order to meet with the quality of the air and maintain human health and hygiene, many work has been carried out in the field of purifying the air but none of them meets with requirements of purifying the water along with the purification of air. The prior art emphases on purifying the air either by providing only the air purifiers or by providing air coolers that purifies the air.An evaporative cooler is a device that cools air through the evaporation of water. In the evaporative air coolers the water is passed through the wet porous air filters and the air is drawn from those filters. The moisture evaporates in the air as it is drawn from the filters.

The principles of evaporative air-cooling have been exploited for several decades by people of many countries to obtain relief from uncomfortably warm environments. Air coolers are more effective in dry, hot and tropical locations. Present day air coolers typically comprise of a body, a water tank, fibre pads of different possible materials, air moving device (axial or centrifugal or cross flow fans) and water circulation system. A motorized air-moving device mounted within the body of the air cooler — with fibre pads mounted on at least one of the sides of the air cooler blows the cool air from the air outlet, usually at front or top of the air cooler. The loosely woven fibres of the fibre pads are preferably made of wood shavings or cellulose. In case when fibre pads are made of wood shavings, wool is filled in the cotton net of the fibre pad and in the case when fibre pads are made of cellulose, the fibre pad consist of paper and special adhesive with multiple layer of corrugated paper arranged in honeycomb manner. The fibres of the pads are kept wetted using a water distribution system. The air filters are arranged between an air inlet and an air outlet of the air in order to purify the passing air. Air inlet grills of the evaporative air coolers are always kept open, in order to allow air to be drawn with minimum resistance from the air inlet of the air cooler.

However, said air purifiers are designed for use in a closed room, and, fail to provide constant source of fresh air. Indoor air quality hence suffers due to stale air in the space. Conventional Air coolers fails to purify the water and thereby fails to provide fresh, filtered cooled air. The filter system of the conventional evaporative air cooler comprise a pad filter, and air moving device (axial or centrifugal or cross flow fans) which is not effective for cleaning the air and water, and thus the conventional evaporative air coolers fails to provide purified air free of any microbial contamination, dust particles. Further in the conventional evaporative air coolersair inlet grills of the evaporative air coolers are always kept open, in order to allow air to be drawn with minimum resistance from the air inlet of the air cooler.Such an air inlet has to be kept open during air flow, at the best one can put a plastic mesh or metal mesh or cotton mesh to remove insects and remove very coarse dust particles. Also, it is not feasible to place any air filter at the air outlet, because the velocities and resistance are high, which further leads to entrance of various pollutants from air inlet grills.

Further dust and other particles and microbial contaminationentering into the conventional air cooler leads to unpleasant smell issues over a period of time and the delivered air from the air outlets are dusty and pollutant. There are varieties of pollutants in ambient air like particulate matter, volatile organic compounds, formaldehyde, harmful gases, dust, mites, pollen, and microbial matter harmful to human beings. Conventional evaporative air coolers fails to provide mechanism to purify air by removing all these pollutants. Furthermore, the insides of the conventional evaporative air cooler (tank, pad) are wet for some time after the air cooler is switched off, which further leads to breeding of mosquitoes, insect and other microbial matter. The water stored in the evaporative coolers is stagnant and thereby leads to production of mosquito larvae. Further, said microbial matters enters water and eventually passes in the air stream. Conventional air coolers fails to provide devices or processes to control the growth or filter microbial matter before letting them pass to the air stream. Also, the water that remains stored in the air cooler tank, while cooler is not in use, becomes breeding ground for not only mosquitoes, but also bacteria and other bio-mass. This results also in a bed smell apart from other health issues. In order to avoid mosquito breeding and microbial growth in the conventional evaporative air coolers the water in the eater tank needs to be frequently replaced which thereby consumes more water and causes water loss. Thus the conventional evaporative air coolers fails to provide a system that delivers fresh, purified microbial, pollutantfree air and a system that saves water.

PRIOR ART AND IT’S DISADVANTAGES:

• US patent application numbered US 20140174116 A1 discloses, an evaporative cooler and pad operates on the principle of cooling the air by evaporation of water passing through one or more evaporator pads in the cooler. The evaporation of water cools the air as it is drawn through the cooler by an internal fan. The pads of the evaporative cooler and pad are formed of luffa sponge fibres. The cooler may include a device for dispensing antimicrobial and/or antifungal agents into the water reservoir of the cooler. Alternatively, the pads may be pre-treated with antimicrobial and/or antifungal agents. A cooling fan is provided in the interior of the cooler to blow cooled, humidified air over the surface of the water in the reservoir before the water is passed through the evaporator pads, thereby increasing the cooling efficiency of the system. However, in the cited prior art the water is only purified from the microbial contamination when it passes through the evaporative pads and fails to purify the stagnant water stored in the water tank
• Another patent application numbered CN 1634604 A discloses, a composite nanometer air purifying material comprising ingredients by weight percentages as follows: di 3 5 5 trimethylhexylfumarate 10-35%, nano titanium dioxide 10-25%, nano sweet wormwood 1-2%, nanoarnebia root 1-2%, nano bupleurum root 1-3%, nano pepper mint 1-10%, linalool 10-16%, geranium oil 10-18%, grass oil 5-15%. The product can effectively inhibit and kill harmful bacteria in the air.

• However, the cited prior arts fails to provide a system that purifies water filled in the water tank of the evaporative air cooler. In said prior arts the filter are placed in the evaporative pads and are provided for the filtration of evaporated air. Further said evaporative pads due to placement of filters gets choked up due to bio-mass filtration and thereby reduces the efficiency and velocity of air delivery. Also due to bacterial, fungal and mosquito larvae growth in the water in the water tank of said evaporative air coolers there is a need to frequently drain and replace the water and thereby leads to more utilization of water.

DISADVANTAGES OF PRIORART:

Conventional evaporative air coolers and said prior arts suffers from all or at least any of the following disadvantages.

? Most of them fails to provide a system that purifies the stored water in the water tank of the evaporative air coolers.

? In said prior art, evaporative pads gets clogged due to deposition of various dust particles and minerals from the water and there by fails to provide consistent and efficient air delivery.
? They fail to provide a system that filters the microbial contamination, dust particles from the water stored in the water tank.
? Most of them requires a constant and frequent supply of water and thereby fails to conserve water.
? None of them improves the quality of water with each usage.
? Most of them fails to provide air and water purification process which removes pollutants such as dust, particulate matter, microbial contamination, oily substances, greasemites, pollen, volatile organic compounds, formaldehyde, and harmful gases.

Thus, there is an unmet need to come up with an invention that obviates the problems of prior art and conventional evaporative air coolers.

OBJECTS OF INVENTION:

The primary object of the present invention is to provide an improved evaporative air cooler.
Another object of the present invention is to provide an improved evaporative air cooler which provides purified, fresh, cool air through purification and evaporation of purified water.
Yet another object of the present invention is to provide an improved evaporative air cooler which provides a system for air and water purification and thereby aids in removal of pollutants such as dust, particulate matter, microbial contamination, oily substances, grease mites, pollen, volatile organic compounds, formaldehyde, and harmful gases.

Yet another object of the present invention is to provide an improved evaporative air cooler that filters out the microbial contamination including bacterial and fungal contamination from the water and thereby provides fresh, purified air.

Yet another object of the present invention is to provide an improved evaporative air cooler that filters out the dust, oily substances and grease from the water and thereby provides fresh and purified air.

Yet another object of the present invention is to provide an improved evaporative air cooler that filters out larvae of mosquitos form the water stored in the water tank of the cooler and thus provides fresh and purified air.

Yet another object of the present invention is to provide an improved evaporative air cooler that prevents the clogging of evaporative pads and thereby provides efficient and consistent air delivery.
Yet another object of the present invention is to provide an improved evaporative air cooler that eliminates the requirement of frequently changing the water stored in the water tank and thereby conserves water.

Yet another object of the present invention is to provide an improved evaporative air cooler which provides fresh, filtered purified air through purification of water stored in the evaporative cooler.

Yet another object of the present invention is to provide an improved evaporative air cooler that obviates the disadvantages of prior art.

BRIEF DESCRIPTION OF DRAWINGS:

Fig.1 : Shows the perspective view of an Evaporative air cooler.
Fig.2 : Shows the fragmented view of the present improved Evaporative air cooler.
Fig.3 : Graph showing reduction in oily and greasy substances in the water treated through present improved evaporative air cooler.
Fig.4 : Graph showing comparison of reductionof microbial contamination between the untreated water, water treated through present improved evaporative air cooler, RO treated water.

Meaning of Reference numerals of said component parts of present IMPROVED Evaporative Air Cooler:

1 : Present Improved Evaporative Air Cooler
2 : Evaporative Air cooler
3 : Pad Assembly
4 : Evaporative Pad
5 : Nano filter
6 : Water Tank
7 : Centrifugal Fan
8 : Centrifugal Fan Housing
9 : Motor
10 : Pump
11 : Back Panel
12 : Front panel

DETAILED DESCRIPTION OF INVENTION:

The present invention provides an improved Evaporative air cooler1.Present improved evaporative air cooler 1 provides a system for purification of water and air and thereby aids in removal of pollutants such as dust, particulate matter, microbial contamination, oily substances, grease mites, pollen, volatile organic compounds, formaldehyde, and harmful gases. Said system takes into account following key features and eliminates the disadvantages of the prior art.

i. Provides a system for purification of water and air in the evaporative air coolers.
ii. Consistently provides fresh, filtered, purified air through evaporation of purified water.
iii. Eliminates the clogging of the evaporative pads, and thereby provides constant and consistent air delivery.
iv. Eliminates the need of frequently changing the water stored in the water tank and thereby minimizes water consumption.

Referring to Fig. 1 the evaporative air cooler 2 comprises of:
• Front Panel 12,
• Back Panel 11;

And further referring to Fig.2, present improved evaporative air cooler comprises of:

• Pad Assembly 3
• Evaporative Pad 4
• Nano filter 5
• Water Tank 6
• Centrifugal Fan 7
• Centrifugal Fan Housing8
• Motor 9
• Pump 10

Said evaporative air cooler 2consists of an evaporative cooler body, which further comprises of Front Panel 12, Back Panel 11. Referring to Fig.2, adjacent to said Front Panel 12, a pad assembly 3 is provided for cooling. Said pad assembly 3 consists of an evaporative pad 4, made up of fibrous absorbent material that includes but does not limits to aspen fiber or cellulose fiber honeycomb pads. Said evaporative pad 4 is arranged such that it provides a large surface area for the evaporation of water and thus provides air delivery with consistent air velocity. Said pad assembly 3 further consists of nano filter 5. Said nano filter 5, made up of nano resins and cellulose fibres is located within tank and is provided for purification of water. Said centrifugal fan assembly 8 is provided for accommodating the centrifugal fan 7, wherein said centrifugal fan 7 is provided forair movement.

Present improved evaporative air cooler 1 provides a system for purification of water and air and thereby provides pollutant free air, wherein said pollutants are dust, particulate matter, microbial contamination, oily substances, grease mites, pollen, volatile organic compounds, formaldehyde, and harmful gases. Referring to Fig.3, the present system through nano filters, filters the oily substances and grease from the water stored in the said water tank. Further measuring the absorbance of the water filtered through present improved evaporative air cooler 1 shows the reduction in oily substances and grease by 72%, which thereby leads to the production of purified air. As shown in the fig.3, the dotted line in the said figure clearly depicts the reduction in oily substances and grease in the stored water as compared to the untreated water shown as control with dark black lines in the said figure. Thus, the present system efficiently provides purified filtered air through purification of water.

Further, the present improved evaporative air cooler 1 through the said nano filters, filters out the microbial contamination and the larvae of the mosquitoes from the water stored in the water tank. The test data of purifying the water stored in the water tank for up to seven weeks is shown in below table 1.

Table.1 Test Data of purified water in the present improved evaporative air cooler.

Table 1 shows the data where there is substantial reduction in the microbial contamination in the water tested from the evaporative coolers water tank. The water from the water tank of the evaporative cooler is tested for seven weeks and at the end of the seventh week the remaining water in the water tank i.e. 6.63% shows 93.37% of bacterial reduction. Thus even the stagnant water in the water tank of the present improved evaporative air cooler 1 shows the substantial bacterial reduction.
Referring to fig.4, the water treated through the present improved evaporative air cooler 1 is compared with the water treated with the RO (Reverse Osmosis process). Said graph clearly depicts the reduction in microbial contamination in the water treated in the present improved evaporative air cooler1. The untreated water shows the presence of 100% microbial contamination whereas the water treated shows the reduction in microbial contamination by 99.98%. Thus, the present improved evaporative air cooler efficiently saves the water consumption and also provides pure, fresh air through removal of microbial contamination, oily substances, grease, mosquito larvae through purifying the water by said nano filters.

WORKING OF THE INVENTION: (confirm the working of the invention)

The working of the present invention an improved evaporative air cooler 1is best understood in the herein below described steps:

Step:1

For the working of the present improved evaporative air cooler 1 start the power supply to the evaporative air cooler. The air suction is provided for evaporative air cooler mounted on front panel 12 / back panel 11 or any other parts of the evaporative air cooler.

Step: 2
The water from the stored water in the said water tank 6 passes through said nano filters 5 and is pumped with the help of said pump 10. Said nano filters 5 filters out the microbial contamination, oily substances, grease, and mosquito larvae and thus purifies the water before the water passes to the said pad assembly 3.

Step: 3

Warm outside air is drawn into the evaporative air cooler through wet Evaporative Pad 4by the said Centrifugal Fan 7. Said warm air passing through the evaporative pads 4makes the filtered water in the pads to evaporate and thereby provides fresh filtered pure air

Having described what is considered the best from presently contemplated for embodying the present invention, various alterations, modifications, and/or alternative applications of the invention for any system will be promptly apparent to those skilled in the art. Therefore it is to be understood that the present invention is not limited to the practical aspects of the actual preferred embodiments hereby described and that any such modifications and variations must be considered as being within the scope and spirit of this invention, as described in the description of invention above.

ADVANTAGES OF PRESENT INVENTION:

The present improved evaporative air cooler obviates the problems of prior art and has many advantages over the prior art:

? It provides a system for purification of water and air in the evaporative air coolers.
? Provides fresh, purified air through evaporation of purified water.
? Increases the efficacy of evaporative pads by eliminating the problem of clogging of particulate matters in the evaporative pads.
? Provides efficient air delivery through consistent velocity of air.
? Provides anti-microbial effects which eliminates the microbial contamination from the water and thereby provides fresh, purified air.
? Eliminates the contents of oily substance and grease from the water and provides fresh, purified air.
? It further eliminates the mosquito larvae from the water.
? Eliminates the foul smell of the stored stagnant water and further eliminates the need to change the stagnant water frequently as in conventional evaporative air coolers.