Claims:We claim:
1. An Evaporative Air Cooler comprising of an outer frame with recess at the bottom to hold water, side walls which could be removable and attached to the outer frame, cooling media / pads removable and attached to the side walls / back walls, a pump to distribute water on the cooling media / pad through tubing and channels on the cooling media / pads, a fan to draw air from the atmosphere through the side and/ or back walls and discharge from front, or, top, or bottom; Control panel with switches to operate the Air Cooler and a switch to operate the Air Cooler in monsoon mode and a Printed Circuit Board with a switch which when selected for EHC, connects and disconnects power supply to the pump at regular time interval; and so water circulation on cooling media will stop and resume at regular time interval;
2. An evaporative air cooler of claim 1, with optional control method other than use of electronic circuit or EHC button, that allows to connect and disconnect power supply to the pump at regular time interval; and so water circulation on cooling media will stop and resume at regular time interval;
3. An Evaporative Air Cooler of claim 1 optionally comprising of a control panel which houses a switch which when pressed once, the pump is switched on continuous cooling operation.
4 Control panel of claim 3 for evaporative cooler of claim 1, wherein if the switch of claim 3 is pressed second time, the cooler operates in monsoon mode.
5. Control panel of claim 5 in monsoon mode wherein the pump is automatically switched ON and OFF at regular time intervals.
6. Control panel as described in claim 1 to claim 3 where such operation is enabled by a specially developed electronic circuit and control logic software. The on and off periods for pump are optimized for control of addition of humidity in to the room during humid ambient / monsoon, which is the essence of the invention. Such optimized time intervals will be specific to the specific air cooler models having their individual air delivery and cooling efficiency specifications.
, Description:The following specification describes the invention

TECHNICAL FIELD:
The present invention relates to an evaporative air cooler which can be also used during humid environment or during rainy / monsoon season. The present invention more particularly relates to an evaporative air cooler which provides comfort cooling by maintaining humidity level in the space low even in humid environment or during rainy season when the humidity levels are generally high. The present invention controls the addition of humidity to air by optimized periodic operations of water circulating pump.

BACKGROUND AND PRIOR ART:
An evaporative air cooler is a device that cools the air in the space to be cooled by the process of the evaporation of water and are popularly known as Evaporative Air Coolers. Existing evaporative air cooling devices have a small water reservoir typically at the bottom of the device. A pump pulls water from the reservoir and pumps it through tubing to the top and / or side of the unit, where it gets distributed through appropriate arrangement and flows down the sides and through one or more porous pads (cooling media) that line the sides (and / or back) of the unit. An electric motor powers a fan (centrifugal / axial / cross flow or any other type of fan) typically near to the air discharges side of the device, and, is responsible to suck air from the cooling media and blow to the space being cooled. As the air is sucked through the water soaked pads (cooling media), the water gets evaporated in the evaporated in the stream which reduces the temperature of the air and the cooled air is then blown out from the air cooler to provide cooling to the space being cooled. This evaporation is caused by a transfer of heat from the air to the water. This results in a net loss of heat in the air or, in other words, cooling. Evaporative coolers are considerably less expensive to operate than air conditioners and, in seasons of low ambient humidity they are quite effective. However, as humidity increases, the cooling efficiency of evaporative air coolers decreases drastically. Using the evaporative air cooler in humid ambient conditions or during rainy / monsoon season when the atmospheric humidity levels are already higher causes further increase in humidity levels and discomfort to the users.
During seasons of high humidity, the pump of the cooler can be turned off enabling the air cooler to deliver air blast without adding extra humidity. However, in when such pump is turned off, there is no cooling also. Hence, the air coolers of prior art cannot provide cooling (and yet not increase humidity levels in space being cooled) during monsoon or high humidity seasons.
It is therefore an objective of the present invention to provide for an evaporative air cooler which controls addition of humidity to the air during monsoon (high humidity) season.
It is therefore an objective of the present invention to provide for evaporative air cooler which maintains temperature and humidity in an enclosure automatically.
It is therefore an objective of the present invention to provide for evaporative air cooler which has an electronics circuit and logic software to monitor the Pump ON / OFF mode at regular intervals to provide air cooling with controlled addition of humidity levels in the space being cooled.

SUMMARY OF THE INVENTION:
An evaporative air cooler as per the present invention comprises of an evaporative air cooler with a specially designed electronics circuit and a control logic software. The air cooler comprises of an outer frame with a reservoir at the bottom to store water. The side and / or back walls of the outer frame comprise of fixed or removable walls. The side and / or back walls comprise of an appropriately designed arrangement of channel running through the upper length such that water can flow through the channel and have suitable opening at regular intervals facing such that water can fall on the pads. An assembly of clamp on the inside of the side walls hold pads onto the wall. The pad could be any materials which can retain some amount of moisture and water. The side walls are removable on the outer frame through an interlocking mechanism. In a preferred embodiment the outer frame is made of metal or plastic material. The air discharge (usually front, top or bottom) portion of the Air Cooler house the electronic control panel for operating the Air Cooler. Such a control panel can be conveniently placed or housed in any part of the cooler and is within the scope of the present invention.
The Control panel houses the printed circuit board duly mounted with specially arranged electronic parts (including ICs and other components) with power switch. Various modes in which the cooler could be operated are programmed through a specially designed control logic software. The printed circuit board – along with other electronic components - holds the switch for turning the Air Cooler into ON or OFF mode, switch for the fan in the Air Cooler to be specifically turned into ON or OFF mode, switch for the pump to be specifically to be turned into ON or OFF. This control circuit – among other switches and controls – Also holds the monsoon mode button, with a nomenclature thought of as COOL / EHC. The COOL / EHC (Electronics Humidity Control) button to switch the pump into regular ON or ON/OFF cycle mode. When the COOL is pressed once, the pump is turned ON. When the COOL is pressed for the second time, the Air Cooler starts operating on the EHC / monsoon mode (that is On/Off cycle mode). The time duration for ON and OFF periods of pump have been optimized after years of experiments in order to achieve cooling even in monsoon or high humidity conditions with minimum increase to the room humidity. The EHC LED light will also indicate that the Air Cooler is on Monsoon mode. On turning the Air Cooler into monsoon mode the power supply to the pump is connected and disconnected at regular intervals as programmed. The pump will then turn ON and OFF at regular intervals. The Air Cooler according to the present invention can be used in different applications (residential, commercial or industrial) and at different positions.
The Air Cooler with the EHC as per the present invention will also reduce consumption of energy as the pump is turned OFF at regular intervals.
The Air Cooler with the EHC as per the present invention will also result in an increased life for the pump as it is turned off at regular intervals.
The term EHC is only generic, it is one of the method of describing monsoon mode. The inventor reserves right to describe the monsoon mode with any other name or nomenclature in future – from time to time – as may be easy for the users to understand the effect and application. The essence of this invention lies in optimized periodic operation (ON and OFF) of water circulating pump, and the function and control can be achieved electronically or by any other suitable methods, and all such control variations will form a part of present inventions.

Brief description of drawings:
The invention will now be described with reference to the accompanying drawings wherein the same numerals are used to denote the same parts. However, it is made clear that the description and the drawings only illustrate the invention and in no way limit the same.
In accompanying drawings:
Figure 1 shows typical construction of an air cooler commonly found in market place as per prior art.

Figure 2 shows the air cooler incorporating monsoon mode as per this invention

Figure 3 shows a control panel incorporating the monsoon mode as per this invention.

Figure 4 shows corresponding PCB

It will be understood that, for the purposes of clarity, certain elements maybe intentionally omitted from certain views where they are believed to be illustrated for better advantage in other views.

The following are the details of the main components of the air cooler in accordance with the invention, which are used with reference to figure 1 to figure 4:

DETAILED DESCRIPTION OF DRAWINGS:
For the purposes of illustrations numerous specific details are set forth in order to provide a thorough understanding of the invention. While the invention has been described in conjunction with the specific embodiments outlined herein, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the preferred embodiments of the invention as set forth above are intended to be illustrative and not limiting. Various changes may be made without departing from the spirit and scope of the invention as defined herein. However, it will be understood by those of ordinary skill in the prior art that the invention may be practiced without these specific details. In other instances, well – known methods, procedures or / or components have not been described in detail so as not to obscure the invention. Reference will now be made in detail to the preferred embodiments of the present invention, an example of which is illustrated in the accompanying drawings (but not restricted or limiting to these inventions by drawings).
Directional phrases used herein, such as, for example, left, right, top, bottom, upper, bottom, side, back, inner, outer and derivatives thereof, relate to the orientation of the elements shown in the drawings and are not limiting upon the claims unless expressly recited therein.

Figure 1 shows typical construction of an Air Cooler 10 which is commonly sold in the market. The three side walls 11 are attached the frame by any means including an interlocking mechanism. The Air Cooler has a control panel 12 to turn the Air Cooler and its electric devices ON or OFF as per the requirement of the user. The Air is discharged into the room from one side wall 13 which has slits 14 for air to flow. The slits enable control of direction of air flow in a horizontal mode 15 as well as vertical mode 16.
Figure 2 shows an Air Cooler 20 as per the present invention after all the components parts are attached including the control panel 31. The Air is discharged into the room from one side wall 21 which has slits for flow of the Air and is known in the art as shown in Fig. 1. The slits enable control of direction of air flow in a horizontal pattern 15 as well as vertical pattern 16.
FIG 3 shows the isometric view of the control panel 31. The control panel 31 houses the Cool / EHC button 32 for the user to operate the Air Cooler in the monsoon mode and the LED indicator 33 which shows to the user that monsoon mode has been activated. The control panel further houses several other buttons (switches) and LEDs depending upon other functionality and features of the cooler. The supply of power from the control panel through electric cables is a known mechanism.
FIG 4 shows the printed circuit board (PCB) 41 which is housed within the Control Panel but is not visible to the user until the cover of the control panel is removed. The Control Panel is attached to the PCB 41 in such a manner that when a user touches any switch or button on the Control panel it is immediately connected to the corresponding switch or button on the PCB 41. The printed circuit board 41 houses the cool EHC button 42 and the LED indicator 43. The printed circuit board has been configured for EHC button 42 such that it supplies and disconnects power supply to the pump at regular intervals of time. The supply of power from the control panel through electric cables is a known mechanism. When the EHC button 42 is in normal mode the power supply to the pump is continuous. When the EHC 42 is in monsoon mode, the power supply is through the electronic circuitry mounted on PCB 41 which using the logic software program, connects and disconnects power supply to the pump at regular intervals. This results in release of moisture at regulated intervals thereby allowing air cooling yet without increase in humidity levels to the space being cooled.
The advantage of new concept :-

1. The Invented “Monsoon Mode” of Air cooler allows air cooling even in monsoon / high humidity conditions without increase in humidity level in the space being cooled.
2. The invented “Monsoon Mode” of air cooler regulates power supply to pump (Stop pump at regular intervals and runs for regular intervals) hence less power consumption.
3. The Invented “Monsoon Mode” of Air cooler also ensures to run pump only for required duration (To allow cooling but yet not add humidity levels) hence pump life is increased.