TECHNICAL FIELD

The present disclosure relates to air cooling. More particularly, the present
disclosure relates to a water efficient air cooler to provide comfort cooling and that is water efficient.

BACKGROUND

Background description includes information that may be useful in understanding
the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] Earth's atmosphere is trapping more heat due to greenhouse gases, causing
average temperatures to rise globally. As the temperature of the earth is increasing, heat waves are becoming more and more common. The heat waves can occur when a very high temperature is observed for several days and nights. Higher temperatures can also lead to other changes around the world because increasing air temperature directly affects the oceans, patterns of weather, rain and snow, and plants and animals. Warmer it gets, more severely it impacts people. Living in optimal temperature conditions is essential for survival of all life forms, including humans.
[0004] To fight this adverse temperature conditions, we require air cooling or air
conditioning techniques to provide comfort cooling. Now, commercially available Air Conditioners (ACs) can be used for providing comfort cooling. However, ACs consume a lot more power therefore operating cost of the ACs is very high. Hence, ACs can be only afforded by wealthy. Air coolers provides a cost-effective alternative to ACs to provide comfort cooling. Comfort cooling is used in residential houses and office buildings. The use of an air/dessert cooler is to cool the air ambient to the air cooler. The air cooler require water to bring about cooling of the ambient air. Thus, water consumption/wastage is increased during summer time. We should never forget about the excessive wastage of water in these devices, as water is the most precious natural resource since it is essential for human survival and life on the Earth. But

availability of water for human consumption is increasingly under stress due to a number of factors.
[0005] Further, present air/dessert cooling devices for comfort cooling are not very
efficient since their uses totally depend on the climate conditions. The water vapors add to air and cool down the air. The humid areas have high humidity in the air. So, when you operating air cooler in high humidity area, there is no place for extra humid to air, making the air cooler functioning less effective. During the runtime of air cooler, water evaporates and increases the humidity in the air. Increase in the humidity is much favorable conditions to increase bacteria, viruses, mold in the water.
[0006] Hence, there is a need for an air cooler for providing comfort cooling that is
economical to produce and maintain, and can be used in humid areas that overcome the above-mentioned and other limitations of the existing solutions and utilize techniques, which are robust, accurate, fast, efficient, cost effective and simple.
[0007] All publications herein are incorporated by reference to the same extent as if each
individual publication or patent application were specifically and individually indicated to be
incorporated by reference. Where a definition or use of a term in an incorporated reference is
inconsistent or contrary to the definition of that term provided herein, the definition of that term
provided herein applies and the definition of that term in the reference does not apply.
[0008] In some embodiments, the numbers expressing quantities of ingredients,
properties such as concentration, reaction conditions, and so forth, used to describe and claim certain embodiments of the invention are to be understood as being modified in some instances by the term "about." Accordingly, in some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable. The numerical values presented in some embodiments of the invention may

contain certain errors necessarily resulting from the standard deviation found in their respective testing measurements.
[0009] As used in the description herein and throughout the claims that follow, 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.
[00010] The recitation of ranges of values herein is merely intended to serve as a
shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g. "such as") provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.
[00011] Groupings of alternative elements or embodiments of the invention disclosed
herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all groups used in the appended claims.
OBJECTS OF THE INVENTION
[00012] Some of the objects of the present disclosure, which at least one embodiment
herein satisfies are as listed herein below.
[00013] It is an object of the present disclosure to provide a water efficient air cooler.
[00014] It is another object of the present disclosure to provide a water efficient air cooler
that is cost efficient and easy to implement.

[00015] It is another object of the present disclosure to provide a water efficient air cooler
that is does not increase humidity of the ambient air.
[00016] It is another object of the present disclosure to provide a water efficient air cooler
that reduces energy consumption.
[00017] It is another object of the present disclosure to provide a water efficient air cooler
that reduces wastage of water.
SUMMARY
[00018] The present disclosure relates to air cooling. More particularly, the present
disclosure relates to a water efficient air cooler to provide comfort cooling that is water efficient.
[00019] An aspect of the present disclosure provides an air cooler. The air cooler can
include a housing. The housing can include: an inlet provided on the housing to receive air at an
ambient temperature; a heat exchanger configured to receive the air at the ambient temperature,
said heat exchanger comprising a plurality of coils configured for flow of a cooling fluid,
wherein, as the air flow across the heat exchanger, heat exchange is affected between the air at
ambient temperature and the heat exchanger to cool the air; and an outlet provided on the
housing for the outward flow of cooled air.
[00020] In an embodiment, the flow of air within the housing is enabled by a forced
draught fan.
[00021] In an embodiment, the air cooler comprises a pump to circulate the thermal fluid
through the heat exchanger.
[00022] In an embodiment, the air cooler comprises a set of sensors to sense the
temperature of ambient air, and a control unit operatively coupled with the set of sensors, the
control unit configured to control the cooling operation of the heat exchanger based on the
sensed temperature.
[00023] In an embodiment, the air cooler comprises a Peltier module thermally coupled to
the cooling fluid to cool the thermal fluid.
[00024] Another aspect of the present disclosure provides a cooling fluid of an air cooler.
The cooling fluid can include: at least a fraction of water; and a thermal fluid, wherein the

quality of said thermal fluid is determined by a pre-determined ratio with the fraction of water.
The cooling fluid can be used to bring about cooling action of the air cooler.
[00025] Various objects, features, aspects and advantages of the inventive subject matter
will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.
BRIEF DESCRIPTION OF THE DRAWINGS
[00026] The accompanying drawings are included to provide a further understanding of
the present disclosure, and are incorporated in and constitute a part of this specification. The
drawings illustrate exemplary embodiments of the present disclosure and, together with the
description, serve to explain the principles of the present disclosure.
[00027] FIG. 1A illustrates an exemplary representation of a front view of an air cooler in
accordance with an embodiment of the present disclosure.
[00028] FIG. 1B illustrates an exemplary representation of side view of an air cooler in
accordance with an exemplary embodiment of the present disclosure.
[00029] FIG. 1C illustrates an exemplary representation of perspective view of an air
cooler in accordance with an exemplary embodiment of the present disclosure.
[00030] FIG. 1D illustrates an exemplary representation of sideways sectional view of an
air cooler in accordance with an embodiment of the present disclosure.
[00031] FIG. 2 illustrates an exemplary block diagram representation of an air cooler in
accordance with an embodiment of the present disclosure.
[00032] FIG. 3 illustrates an exemplary representation of schematic diagram of an air
cooler in accordance with an embodiment of the present disclosure.
DETAILED DESCRIPTION
[00033] The following is a detailed description of embodiments of the disclosure depicted
in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications,
6

equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[00034] Each of the appended claims defines a separate invention, which for infringement
purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the "invention" may in some cases refer to certain specific embodiments only. In other cases, it will be recognized that references to the "invention" will refer to subject matter recited in one or more, but not necessarily all, of the claims.
[00035] Various terms as used herein are shown below. To the extent a term used in a
claim is not defined below, it should be given the broadest definition persons in the pertinent art
have given that term as reflected in printed publications and issued patents at the time of filing.
[00036] Embodiments of the present invention may be provided as a computer program
product, which may include a machine-readable storage medium tangibly embodying thereon instructions, which may be used to program a computer (or other electronic devices) to perform a process. The machine-readable medium may include, but is not limited to, fixed (hard) drives, magnetic tape, floppy diskettes, optical disks, compact disc read-only memories (CD-ROMs), and magneto-optical disks, semiconductor memories, such as ROMs, PROMs, random access memories (RAMs), programmable read-only memories (PROMs), erasable PROMs (EPROMs), electrically erasable PROMs (EEPROMs), flash memory, magnetic or optical cards, or other type of media/machine-readable medium suitable for storing electronic instructions (e.g., computer programming code, such as software or firmware).
[00037] Various methods described herein may be practiced by combining one or more
machine-readable storage media containing the code according to the present invention with appropriate standard computer hardware to execute the code contained therein. An apparatus for practicing various embodiments of the present invention may involve one or more computers (or one or more processors within a single computer) and storage systems containing or having network access to computer program(s) coded in accordance with various methods described herein, and the method steps of the invention could be accomplished by modules, routines, subroutines, or subparts of a computer program product.
7

[00038] If the specification states a component or feature “may”, “can”, “could”, or
“might” be included or have a characteristic, that particular component or feature is not required
to be included or have the characteristic.
[00039] As used in the description herein and throughout the claims that follow, 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.
[00040] 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)
[00041] The present disclosure relates to air cooling. More particularly, it relates to an air
cooler to provide comfort cooling air with lesser usage of water.
[00042] The present disclosure relates to comfort cooling using a water efficient air
cooler. The air cooler can include: a housing comprising: an inlet provided on the housing to
receive air at an ambient temperature; a heat exchanger configured to receive the air at the
ambient temperature, the heat exchanger comprising a plurality of coils configured for flow of a
cooling fluid, wherein, as the air flow across the heat exchanger, heat exchange is affected
between the air at ambient temperature and the heat exchanger to cool the air; and an outlet
provided on the housing for the outward flow of cooled air.
[00043] In an embodiment, the flow of air within the housing is enabled by a forced
draught fan.
[00044] In an embodiment, the air cooler comprises a pump to circulate the thermal fluid
through the heat exchanger.
8

[00045] In an embodiment, the air cooler comprises a set of sensors to sense the
temperature of ambient air, and a control unit operatively coupled with the set of sensors, the control unit configured to control the cooling operation of the heat exchanger based on the sensed temperature.
[00046] In an embodiment, the air cooler comprises a Peltier module thermally coupled to
the cooling fluid to cool the thermal fluid.
[00047] In an embodiment, a cooling fluid of an air cooler can include: at least a fraction
of water; and a thermal fluid, wherein the quality of the thermal fluid is determined by a pre-determined ratio with the fraction of water that can be further used as a cooling fluid for the air cooler.
[00048] More particularly, it relates to a cooling fluid configured to cool the heat
exchanger coils, in such a way it cools down the induced ambient air and provide comfort cooling.
[00049] During the runtime of the cooler, most of the them generate cooling with
humidification’s. This problem will generate the problem to the comfort condition of the user, where the present disclosure provide a solution for this problem.
[00050] FIGs. 1A through 1D illustrates an exemplary representation of front, side,
perspective and sideways sectional view of an air cooler in accordance with an embodiment of present disclosure.
[00051] In an embodiment, an air cooler 100 can include a housing 106. The housing 106
can be used for providing a frame for loading all the components of the air cooler 100. Further, the housing 106 can enclose all components of the air cooler 100. In an embodiment, the housing 106 can be made of a material that is firm to withstand load of all the components of the air cooler 100. In an embodiment, the housing 106 can be of material such as alloy of iron such as steel and the like that are firm, rust resistant and can withstand load of components of the air cooler 100.
[00052] In an embodiment, the housing 106 can have one or more inlets 104. The inlets
104 can be configured such that they can accept air ambient to the air cooler 100. In an embodiment, the inlet 104 can be plurality of openings on the housing 106 or the inlet 104 can
9

include detachable fins or pads that can be coupled with the housing 106. In an embodiment, the
inlet 104 can be an opening in the housing 106 for accepting air ambient to the air cooler 100.
[00053] In an embodiment, the air cooler 100 can include a heat exchanger 112 configured
to receive the air at the ambient temperature. The heat exchanger can include a plurality of coils for flowing of a cooling fluid wherein, as the ambient air flow across the heat exchanger 112, exchange of heat energy takes place and provide an effect on the air at ambient temperature to cool it down at desired temperature.
[00054] In an embodiment, the housing 106 can have an outlet 102 to deliver the cooled
air with the help of a forced draught fan 120. The fan 120 can be propelled using a fan motor 114. In an embodiment, the outlet 102 of the housing 106 can have strips of extended projected areas or fins configured to provide a direction of flow to the cooled air.
[00055] In an embodiment, the material of the fins can be same as that of the housing 106.
The fins can be configured on the outlet 106 of the housing 106. The fins can also have pivot
joints at the corner of each strips of the fin such that the fins can also be used to provide a feature
of adjustment of the strips to provide a direction for the outward flow cool air.
[00056] In an embodiment, the housing 106 can also include a reservoir 118. The reservoir
118 can be located at top end of the housing 106. The reservoir 118 can be used for storing the
cooling fluid, wherein the cooling fluid includes a mixture of least fraction of water with the
thermal fluid. The defined cooling fluid can have property of most of the liquid coolants.
[00057] In an embodiment, the mixture present in the reservoir 118 also contains of a pre-
determined ratio with the fraction of water that can be further used as a cooling fluid for the air cooler.
[00058] In an embodiment, the air cooler 100 can include a pump 116 that can be used for
circulation of the cooling fluid through the heat exchanger 112.In an embodiment, the air cooler 100 can include a set of sensors (not shown). The set of sensors can be coupled to the outlet 102 to sense the temperature of the air ambient to the air cooler 100. In an embodiment, the air cooler 100 can include a control unit (not shown) operatively coupled to the set of sensors, the forced draught fan, the pump and a Peltier module.
[00059] In an embodiment, the air cooler 100 can include a control unit (not shown)
operatively coupled to the set of sensors, the forced draught fan, the pump and a Peltier module
10

108. The Peltier module 108 can be used to cool the cooling fluid. In an embodiment, the air
cooler 100 can include fins 110. The fins 110 can enable generation of forced draught.
[00060] FIG. 2 illustrates an exemplary block diagram representation of the water efficient
air cooler in accordance with the present disclosure.
[00061] In an embodiment, the system shown in FIG. 2 allows the air cooler 100 to
decrease the temperature of induced ambient air by functioning of the heat exchanger unit. In a
preferred way a controller 204 can be used for controlling all components assemble of the air
cooler to provide optimized operation to provide controlled comfort cooling of the air ambient to
the air cooler 100.
[00062] In an embodiment, the controller 204 can be operatively coupled with water level
indicator unit 209 to monitor in real-time level of the cooling fluid present in the reservoir.
[00063] In an embodiment, the controller 204 can be operatively coupled with temperature
sensor unit 207. The temperature sensor unit 207 can be used to sense the temperature of the
cooling fluid or mixture of thermal fluid and water.
[00064] In an embodiment, the air cooler can include a relay 205. The relay 205 can be
operatively coupled with the controller unit 204 to control turning ON or turning OFF of Peltier
module 206. In an embodiment, the Peltier module 206 can be thermally coupled with the
cooling fluid. The Peltier module 205 can be used to enable cooling of the cooling fluid. The
Peltier module 206 can provide cooling effect using Peltier effect (also known as thermoelectric
effect).
[00065] The Peltier module 206 has two sides, and when a DC electric current flows
through it, heat is transferred from one side of the plate to another, so that one side gets cooler
while the other gets hotter. The ‘hot’ side is attached to a heat sink so that it remains at ambient
temperature, while the ‘cool’ side goes below room temperature, and can be used to in turn
provide cooling effect to other media (such as fluids, for example air in present invention) either
directly or by using a heat exchanger configuration.
[00066] In an embodiment, based on the sensed temperature of the cooling fluid, the
control unit 204 can be configured to control the cooling of the cooling fluid to cool the ambient
air to a desired temperature.
11

[00067] In an embodiment, the Peltier module 206 can have a terminal marked +ve that
can be coupled with positive terminal of a battery and a terminal marked –ve that can be coupled with negative terminal of the battery. In this manner, appropriate DC power can be supplied to a Peltier module 206 when cooling is required.
[00068] In an embodiment, the air cooler can include an LCD screen 208 operatively
coupled with the controller 204 to display various parameters associated with the air cooler. In an embodiment, the various parameters associated with the air cooler can include ambient temperature, cooling fluid temperature, set temperature and the like.
[00069] In an embodiment, the air cooler can include a pump 203. The pump 203 can be
placed at the base of the cooler, so that it can collect the cooling fluid from bottom to top with the help of two-way centrifugal pump which enables the heated fluid to enters from one side and leaves from other side to pump up the cooling fluid back to reservoir and the cooling fluid within to pipes to transmit the thermal fluid to the heat exchanger unit to facilitate cooling of the ambient air. Now, the cooling fluid from the heat exchanger unit will get warm due to heat exchange, and can be made to flow, using the pipes, to the reservoir.
[00070] In an embodiment, power supply 202 of the air cooler can receive power from AC
source to DC power supply. The power supply 202 can be used for providing power to various
components of the air cooler such as the controller 204, the pump 203, the relay 205 etc.
[00071] In an embodiment, the AC source to DC power supply 201 can be used for
powering a motor 210 of a fan 211. The fan 211 can be configured to induce air ambient to the air cooler towards the heat exchanger.
[00072] In an embodiment, the power supply box 202 can be used to convert the AC
power received from the AC source 201 into DC power. The power supply 202 can include rectifiers to convert the AC power to the DC power.
[00073] In an embodiment, the controller 204 can include one or more processors or
controllers. Examples of controllers include, but are not limited to PIC® 16F877A microcontroller, AVR® ATmega8 & ATmega16, Renesas® microcontroller and the like. Examples of processor can include, but are not limited to, an Intel® Itanium® or Itanium 2 processor(s), or AMD® Opteron® or Athlon MP® processor(s), Motorola® lines of processors, FortiSOC™ system on a chip processors or other future processors.
12

[00074] FIG. 3 illustrates an exemplary representation of schematic diagram of an air
cooler in accordance with an embodiment of the present disclosure.
[00075] In an exemplary embodiment, an air cooler 300 can include a reservoir 302 to
store cooling fluid. The cooling fluid can be made to flow to through a heat exchanger 304. The heat exchanger 304 can receive air ambient to the air cooler 300. The received air is at ambient temperature (warmer). Now, when the ambient air is made to pass over heat exchanger to cool the air to desired temperature and further warming the cooling fluid.
[00076] In an exemplary embodiment, the air cooler 300 can include a pump 306 to
provide circulation of the cooling fluid such that the cooling fluid can be transmitted to the reservoir with the help of a pipe 308. Further, the reservoir 302 can be thermally coupled with Peltier plates to cool the cooling fluid.
[00077] It would be appreciated by the person skilled in the art that the current invention
can help reduce wastage of water, as traditional air cooler utilize large amount of water as well as consume large amount of electric power to provide cooling effect. Thus, current invention is water and power efficient as compared to traditional air cooler.
[00078] Embodiments of the present disclosure may be implemented entirely hardware,
entirely software (including firmware, resident software, micro-code, etc.) or combining software and hardware implementation that may all generally be referred to herein as a “circuit,” “module,” “component,” or “system.” Furthermore, aspects of the present disclosure may take the form of a computer program product comprising one or more computer readable media having computer readable program code embodied thereon.
[00079] Thus, it will be appreciated by those of ordinary skill in the art that the diagrams,
schematics, illustrations, and the like represent conceptual views or processes illustrating systems and methods embodying this invention. The functions of the various elements shown in the figures may be provided through the use of dedicated hardware as well as hardware capable of executing associated software. Similarly, any switches shown in the figures are conceptual only. Their function may be carried out through the operation of program logic, through dedicated logic, through the interaction of program control and dedicated logic, or even manually, the particular technique being selectable by the entity implementing this invention. Those of ordinary skill in the art further understand that the exemplary hardware, software,
13

processes, methods, and/or operating systems described herein are for illustrative purposes and, thus, are not intended to be limited to any particular named.
[00080] As used herein, and unless the context dictates otherwise, the term "coupled to" is
intended to include both direct coupling (in which two elements that are coupled to each other contact each other) and indirect coupling (in which at least one additional element is located between the two elements). Therefore, the terms "coupled to" and "coupled with" are used synonymously. Within the context of this document terms "coupled to" and "coupled with" are also used euphemistically to mean “communicatively coupled with” over a network, where two or more devices are able to exchange data with each other over the network, possibly via one or more intermediary device.
[00081] It should be apparent to those skilled in the art that many more modifications
besides those already described are possible without departing from the inventive concepts
herein. The inventive subject matter, therefore, is not to be restricted except in the spirit of the
appended claims. Moreover, in interpreting both the specification and the claims, all terms
should be interpreted in the broadest possible manner consistent with the context. In particular,
the terms “comprises” and “comprising” should be interpreted as referring to elements,
components, or steps in a non-exclusive manner, indicating that the referenced elements,
components, or steps may be present, or utilized, or combined with other elements, components,
or steps that are not expressly referenced. Where the specification claims refers to at least one of
something selected from the group consisting of A, B, C …. and N, the text should be interpreted
as requiring only one element from the group, not A plus N, or B plus N, etc.
[00082] While the foregoing describes various embodiments of the invention, other and
further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.
ADVANTAGES OF THE PRESENT DISCLOSURE
[00083] The present disclosure provides a water efficient air cooler.
14

[00084] The present disclosure provides a water efficient air cooler that is cost efficient
and easy to implement.
[00085] The present disclosure provides a water efficient air cooler that is does not
increase humidity of the ambient air.
[00086] The present disclosure provides a water efficient air cooler that reduces energy
consumption.
[00087] The present disclosure provides a water efficient air cooler that reduces wastage
of water.

We Claim:

An air cooler comprising; a housing comprising:
an inlet provided on the housing to receive air at an ambient temperature; a heat exchanger configured to receive the air at the ambient temperature, said heat exchanger comprising a plurality of coils configured for flow of a cooling fluid, wherein, as the air flow across the heat exchanger, heat exchange is affected between the air at ambient temperature and the heat exchanger to cool the air; and an outlet provided on the housing for the outward flow of cooled air. The air cooler as claimed in claim 1, wherein the flow of air within the housing is enabled by a forced draught fan.
The air cooler as claimed in claim 1, wherein the air cooler comprises a pump to circulate the thermal fluid through the heat exchanger.
The air cooler as claimed in claim 3, wherein the air cooler comprises a set of sensors to sense the temperature of ambient air, and a control unit operatively coupled with the set of sensors, the control unit configured to control the cooling operation of the heat exchanger based on the sensed temperature.
The air cooler as claimed in claim 1, wherein the air cooler comprises a Peltier module thermally coupled to the cooling fluid to cool the thermal fluid. A cooling fluid of an air cooler comprising: at least a fraction of water; and
a thermal fluid, wherein the quality of said thermal fluid is determined by a pre-determined ratio with the fraction of water. The air cooler comprising the cooling fluid as claimed in claim 6.