FORM 2
THE PATENTS ACT, 1970 (39 of 1970) & THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See section 10, rule 13)
1. Title of the invention: EFFECTIVE CLEANING OF AN EVAPORATIVE COOLING
UNIT
2. Applicant(s)
NAME NATIONALITY ADDRESS
BAJAJ ELECTRICALS LTD Indian 45/47, Veer Nariman Road,
Mumbai Maharashtra 400 001,
India

TECHNICAL FIELD
[0001] The present subject matter relates, in general, to a cleaning of a cooling
unit, in particular, effective cleaning of an evaporative cooling unit.
BACKGROUND
[0002] Cooling units, such as desert coolers, are very commonly used for
cooling indoor environments. The desert cooler, when operated, circulates water through evaporative pads of the desert cooler. By means of an adiabatic heat exchange between incoming air and the water on the evaporative pads, the air passes heat to water thereby cooling itself down to lower temperature and converting water to vapours. The cooled air is thrown out of the desert cooler to provide cooling effect outside the desert cooler.
BRIEF DESCRIPTION OF DRAWINGS
[0003] The detailed description is described with reference to the
accompanying figures. In the figures, the left-most digit(s) of a reference number
identifies the figure in which the reference number first appears. The same numbers
are used throughout the figures to reference like features and components. Some
implementations of the system(s), in accordance with the present subject matter, are
described by way of examples, and with reference to the accompanying figures, in
which:
[0004] Fig. 1 illustrates a front view of a cooling unit, in accordance with an
implementation of the present subject matter.
[0005] Fig. 2 illustrates a rear isometric view of the cooling unit, in accordance
with an implementation of the present subject matter.
[0006] Fig. 3 illustrates a front isometric view of the cooling unit, in accordance
with an implementation of the present subject matter.
[0007] Fig. 4 illustrates a perspective view of the four-way diverter valve, in
accordance with an implementation of the present subject matter.

[0008] Fig. 5 illustrates a schematic view of the knob positioned on the cooling
unit, in accordance with an implementation of the present subject matter.
[0009] Fig. 6 illustrates a sectional view of the filter unit housed within the
cooling unit, in accordance with the implementation of the present subject matter.
DETAILED DESCRIPTION
[0010] In existing cooling units, such as desert coolers, water is circulated
through evaporative pads of the cooling unit. By means of an adiabatic heat exchange between incoming air and the water on the evaporative pads, the air passes heat to water thereby cooling itself down to lower temperature and converting water to vapours. The cooled air is thrown out of the cooling unit to provide cooling effect outside the cooling unit. The loss of water, by way of conversion into vapours results in reduction in the volume of water within the cooling unit over time. However, as water is converted to water vapour, water inside the cooling unit becomes more and more hard. The hardness of the water leads to scale formation on the surfaces and the components of the cooling unit. The scale formation in the cooling unit adversely affects the performance of the cooling unit.
[0011] The cooling unit requires regular cleaning of scale formations for
enhanced performance of the cooling unit. In the existing cooling units, water is
drained out of the cooling unit. Typically, the water is manually removed from the
cooling unit using a mug or a bucket. The manual removal of the water using a mug
or a bucket may leave some water in the cooling unit. A drain plug provided on a
base of the cooling unit may be removed to remove all the water. However, such
conventional water drainage techniques are tedious and time consuming. Also, such
techniques require the user to use his hands, which may be unhygienic for the user.
[0012] Furthermore, upon draining water from the cooling unit, the surfaces of
the cooling unit are manually scrubbed or cleaned using a scrubber. Upon scrubbing of the cooling unit, the cooling unit is further washed with water so that the scrubbed

scale formations mix with the water and the mixture is further drained out of the cooling unit using the techniques as previously described.
[0013] The conventional cleaning techniques specifically clean the surfaces of
the cooling unit. However, the scale formations on the evaporative pads and fluid
circulations means of the cooling unit cannot be cleaned with the conventional
techniques. The uncleaned evaporative pads and the fluid circulations means of the
cooling unit result to a reduced service life of said evaporative pads and the fluid
circulations means and require complete replacement thereof leading to cost addition.
[0014] The conventional cleaning process of the cooling unit is manual and
unhygienic for the user. Further, the cooling units having bigger capacity are heavy and volumetric and need to be taken to a place where left over dirty water may be drained out. Again, there is a possibility of damaging the base of the cooling unit while draining out the left over dirty water.
[0015] To this end, a cooling unit is described which may be cleaned
automatically with minimal human intervention in accordance with the implementations of the present subject matter.
[0016] The present subject matter presented here addresses the issue of dirty
and tedious chores of cleaning the cooling unit. With the present subject matter, the user has to exercise minimal efforts for cleaning the cooling, without affecting the hygiene of the user.
[0017] In an implementation of the present subject matter, the cooling unit
comprises a tank for storing a fluid. In one example, the tank includes a base having a sump. Further, a submersible pump is positioned within the sump. In one example, the submersible pump comprises at least one inlet and at least one outlet for the fluid. Yet further, a four-way diverter valve is disposed within the cooling unit. In one example, the four-way diverter valve comprising an inlet and three outlets. Furthermore, a filter unit is detachably disposed over the sump such that the filter unit covers the pump and the sump. In one example, the filter unit has at least one hole,

through which a first pipe connecting the at least one outlet of the submersible pump with the inlet of the four-way diverter valve passes.
[0018] The four-way diverter valve is controlled to enable a plurality of settings
for evaporative cooling, descaling of scale formations within the cooling unit, cleaning of the cooling unit, and draining out the stored fluid from the tank. In one example, the four-way diverter valve may be manually or automatically controlled as per the required setting.
[0019] In an implementation of the present matter, the tank includes a plurality
of side panels. In one example, one of the side panels includes an opening. In one implementation, the four-way diverter valve is disposed at the opening of one of the side panels.
[0020] In an implementation of the present matter, the cooling unit includes a
plurality of side covers. In one example, one of the side covers includes an opening. In an implementation, the four-way diverter valve is disposed at the opening of one of the side covers.
[0021] In an implementation of the present subject matter, a surface of the base
adjoining the sump is tapered to flow the fluid into the sump. The tapered design of the base surface may ensure that maximum amount of fluid may flow into the sump so that effective utilization of the fluid may be done through the submersible pump in all the settings.
[0022] In an implementation of the present subject matter, the cooling unit
comprises evaporative pads. In one example, the evaporative pads may be honeycomb pads. In one example, the evaporative pads may be husk pads. In one example, a first outlet of the four-way diverter valve may be connected to a distribution pipe via a second pipe. In one example, the distribution pipe runs over the evaporative pads. The distribution pipe runs over the evaporative pads for uniform distribution of the fluid over the evaporative pads for the purpose of evaporative cooling by the cooling unit.

[0023] In an implementation of the present subject matter, a second outlet of the
four-way diverter valve may be connected to a drain orifice via a third pipe. In one example, the drain orifice is disposed on one of the side panels. In one example, the drain orifice may include an extension so that an auxiliary pipe may be connected to the extension for draining out the stored fluid.
[0024] In an implementation of the present subject matter, a third outlet of the
four-way diverter valve may be connected to a fourth pipe which opens into the tank. In one example, the fourth pipe is a recirculation pipe. In one example, the recirculation pipe may end just above the base of the tank.
[0025] For the evaporative cooling, the cooling unit may be operated in a first
setting of the plurality of settings. In the first setting, the four-way diverter valve may
direct the incoming fluid from the pump to the distribution pipe via the second pipe.
The distribution pipe may circulate the incoming fluid over the evaporative pads of
the cooling unit. The circulated fluid upon contacting with incoming air converts to
vapours, since the incoming air passes heat to the fluid. The vapours cool the air
inside the cooling unit and the cooled air is thrown out of the cooling unit.
[0026] For descaling of scale formations within the cooling unit, a cleaning
agent may be mixed with the fluid already filled in the tank and the cooling unit may be operated in the first setting. The four-way diverter valve may direct the incoming fluid mixture (mixed with the cleaning agent) from the pump to the distribution pipe via the second pipe. The distribution pipe may circulate the fluid mixture over the evaporative pads of the cooling unit, which then flows to the tank. The fluid mixture, when passes through the pump, the second pipe, the distribution pipe, the evaporative pads and the tank, reacts with the scale formations within the the pump, the second pipe, the distribution pipe, the evaporative pads and the tank, and further descales the scale formations. In one example, the cleaning agent upon contacting with the scale formations descale them and lumps of scales float within the tank along with the fluid.

[0027] The cooling unit may be operated for a first pre-specified time period for
descaling the scale formations within the cooling unit. In one example, the first pre-specified time period may be thirty (30) minutes.
[0028] In one example, the cooling unit may be operated in the first setting for
descaling the scale formations, when the scale formations are visually identified on the surfaces of the tank, the evaporative pads and the pipes. In another example, the cooling unit may be operated in the first setting for descaling the scale formations, when a regular cleaning procedure is scheduled.
[0029] For cleaning of the cooling unit, the cooling unit may be operated in a
second setting of the plurality of settings. In the second setting, the four-way diverter
valve directs the incoming fluid from the pump to the recirculation pipe for creating a
fluidic turbulence within the tank. In one example, the fluid may be a mixture of
water and the cleaning agent. The turbulent fluid when passes through the filter unit
leaves the lumps of scales onto the filter unit. In one example, when the pump sucks
the fluid from the pump may also suck the lumps of scales, which when try to pass
through the filter unit stuck thereon. In one example, the cooling unit may be
operated in the second setting for a second prespecified time period for cleaning of
the cooling unit, in which the lump of scales nearly deposits onto the filter unit. In
one example, the second prespecified time period may be thirty (30) minutes.
[0030] For draining out the stored fluid from the tank, the cooling unit may be
operated in a third setting of the plurality of settings. In the third setting, the four-way diverter valve may direct the incoming fluid from the pump to the drain orifice. The drain orifice acts as a passage, through which the stored fluid is drained outside. The cooling unit may be operated in the third setting until the fluid stored in the tank is emptied. Further, upon completely draining the incoming fluid, the filter unit may be detached for manual cleaning and may be replaced after the cleaning.
[0031] In an implementation of the present subject matter, the cooling unit may
comprise a fluid pouring inlet on the one of the side panels. In one example, the fluid

pouring inlet is to pour a cleaning agent into the tank. In one example, the fluid pouring inlet is provided on a top edge of the one of the side panels.
[0032] The implementations of the present subject matter offer a user the ability
to automatically clean the tank and drain the fluid without hassles of manual cleaning. Further, implementations of the present subject matter addresses to the issue of dirty chores of cleaning of tanks of the cooling unit with minimal efforts and with enhanced hygiene. Furthermore, implementations of the present subject matter handle the aspects like scraping of sediments and scale, filtering of the sludge and mud and auto-draining of the stored fluid.
[0033] These and other advantages of the present subject matter would be
described in a greater detail in conjunction with the Figs. 1-6 in the following description. The manner in which the cooling unit is implemented and used shall be explained in detail with respect to the Figs. 1-6.
[0034] It should be noted that the description merely illustrates the principles of
the present subject matter. It will thus be appreciated that those skilled in the art will
be able to devise various arrangements that, although not explicitly described herein,
embody the principles of the present subject matter and are included within its scope.
Furthermore, all examples recited herein are intended only to aid the reader in
understanding the principles of the present subject matter. Moreover, all statements
herein reciting principles, aspects and implementations of the present subject matter,
as well as specific examples thereof, are intended to encompass equivalents thereof.
[0035] Fig. 1 illustrates a front view of a cooling unit 100 as per an
implementation of the present subject matter. The cooling unit 100 comprises a tank 102 capable of storing a fluid. In one example, the fluid may be water. The tank 102 may comprise a base 104 and a plurality of side panels 106. In one example, the plurality of side panels 106 may be mounted on the base 104. The base 104 further comprises a sump 108 in order to accommodate a pump (not shown in Fig. 1). In one example, a surface of the base 104 adjoining the sump 108 may be tapered to flow the

fluid into the sump 108. The tapered design of the base surface may ensure that
maximum amount of fluid may flow into the sump 108 so that effective utilization of
the fluid may be done by the pump in all the settings of the cooling unit 100.
[0036] One of the side panels 106 may comprise a fluid level indicator 110. In
one example, the fluid level indicator 110 may be a longitudinal transparent slit,
through which the level of any fluid inside the tank 102 may be visually observed.
[0037] Further, the cooling unit 100 comprises a front cover 112. In one
example, the front cover 112 may be made of plastic. In another example, the front cover 112 may be made of metal. The front cover 112 comprises an opening 114, which acts as a passage of air from the cooling unit 100 to outside. In one example, a plurality of louvers 116 may be disposed within the opening 114. In one example, the plurality of louvers 116 may be electrically controlled to enable a swing function which directs outflow of air in multiple directions. In one example, the plurality of louvers 116 may be manually controlled. The underside of the base 104 may comprise a plurality of wheels 118. The plurality of wheels 118 may assist in movement of the cooling unit 100 from one location to another in a hassle-free manner.
[0038] Fig. 2 illustrates a rear isometric view of the cooling unit 100 as per an
implementation of the present subject matter. The cooling unit 100 comprises side covers 202. Although two side covers 202 (right-side cover and back cover) are visible in Fig. 2, the cooling unit 100 may include three side covers, which along with the front cover 112 form an enclosure. In one example, each of the side covers 202 may comprise an evaporative pad. In one example, the evaporative pad may be a honeycomb pad. In one example, the cooling unit 100 includes a top cover 204 along with the three side covers, the front cover 112 and the tank 102 form a completely enclosure structure.
[0039] The cooling unit 100 further comprises a fluid pouring inlet 206. In one
example, a cleaning agent from a container 208 may be added to the tank 102 via the

fluid pouring inlet 206. In one example, water may be poured inside the tank 102 via the fluid pouring inlet 206. Examples of the cleaning agent include, but is not limited to Citric acid, Sodium hexametaphosphate, and Acetic acid. The cleaning agent is capable of descaling the scale formations, when the scale formations are treated with the cleaning agent for a prespecified time period. In one example, the prespecified time period may be thirty minutes.
[0040] In an implementation of the present subject matter, the cooling unit 100
comprises a knob 210 for manually controlling a plurality of settings of the cooling unit 100. The knob 210 is described in detail in Figure 5. Fig. 5 illustrates a schematic view of the knob 210 positioned on the cooling unit 100 in accordance with an implementation of the present subject matter. The knob 210 may be controlled for operation in the plurality of settings. In one example, the number of settings may be three. In another example, the settings may be referred to as modes. In one example, the plurality of settings may be a first setting, a second setting and a third setting. The first setting may be a cool mode. The second setting may be a clean mode. The third setting may be a drain mode. In one example, the knob 210 may be manually controlled. In another example, instead of the knob 210, the cooling unit may include an electronic controller (not shown) to control the plurality of settings of the cooling unit 100.
[0041] Returning to the description of Fig. 2, the knob 210 controls a four-way
diverter valve (not shown in Fig. 2) that enables the plurality of settings of the cooling unit 100. In one example, the knob 210 may be positioned on the one of the side covers 202. In another example, the knob 210 may be positioned on one of the side panels 106. Further, an outlet 212 is disposed on one of the side panels 106 In one example, the outlet 212 may be disposed on a top edge of one of the side panels 106. In one example, the outlet 212 may be an auto-drain outlet 212. The auto-drain outlet 212 may drain out the fluid from the tank 102 when the cooling unit 100 is operated in a specific position of the knob 210.

[0042] Fig. 3 illustrates a front isometric view of the cooling unit 100 as per an
implementation of the present subject matter. A submersible pump (not shown in Fig. 3) is positioned within the tank 102. In one example, the submersible pump may be positioned in the sump 108. In one example, the sump 108 is of approximately equal height to that of the submersible pump. In one example, the submersible pump comprises at least one inlet and at least one outlet for the fluid.
[0043] In an implementation of the present subject matter, a four-way diverter
valve 302 may be disposed at an opening of one of the side panels 106. In one example, the four-way diverter valve 302 may be disposed at an opening of one of the side covers 202. In one example, the side cover 202 may be a left-hand side cover. The four-way diverter valve 302 is described in detail in Fig. 4, which illustrates a perspective view of the four-way diverter valve 302 as per an implementation of the present subject matter. The four-way diverter valve 302 comprises an inlet 402, which may be connected to the pump. The inlet 402 ensures supply of the fluid to the four-way diverter valve 302. Further, the four-way diverter valve 302 comprises three outlets 404, 406, 408.
[0044] Returning to the Fig. 3, the four-way diverter valve 302 is disposed
within the cooling unit 100 such that the four-way diverter valve 302 may be
controlled from outside using the knob 210. The outside control of the four-way
diverter valve 302 may enable the plurality of settings of the cooling unit 100.
[0045] In an implementation of the present subject matter, the cooling unit 100
comprises a filter unit 304. Another view of the filter unit 304 is described in detail in Fig. 6, which illustrates a sectional view of the filter unit 304 as per the implementation of the present subject matter. Under the filter unit 304, the sump 108 is disposed with the submersible pump 602. In one example, a bottom of the sump 108 may comprise a drain plug 604. In one example, the drain plug 604 may be plugged out so as to allow the flow of the fluid from the tank 102 to outside. The

filter unit 304 may comprise a hole, through which the submersible pump 602 is connected to the four-way diverter valve 302.
[0046] Returning to the Fig. 3, the filter unit 304 may be detachably disposed
over the sump 108 such that the filter unit 304 covers the submersible pump 602 and the sump 108. In one example, the filter unit 304 has at least one hole, through which a first pipe 306 connecting the at least one outlet of the submersible pump 602 with the inlet 402 of the four-way diverter valve 302 passes. The diameter of the hole is adaptable with the diameter of the first pipe 306.
[0047] In one example, the four-way diverter valve 302 may be controlled to
enable the plurality of settings. Examples of the plurality of settings may include, but is not limited to, evaporative cooling and descaling of scale formations, cleaning of the cooling unit 100, and draining out the stored fluid from the tank 104. In one example, the four-way diverter valve 302 may be manually controlled to enable the plurality of settings. In another example, the four-way diverter valve 302 may be automatically controlled to enable the plurality of settings.
[0048] In an implementation of the present subject matter, the cooling unit 100
may comprise a fan (not shown) connected to a motor (not shown). In one example, the motor may be mounted on a stand positioned on the base 104 of the tank 102. In one example, the cooling unit 100 may comprise a rotary blower unit.
[0049] In an implementation of the present subject matter, the side cover 202
comprises evaporative pads. Example of the evaporative pads may include, but is not limited to, honeycomb pads and husk pads.
[0050] In one example, a first outlet 404 of the four-way diverter valve 302
may be connected to a distribution pipe 308 via a second pipe 310. In one example, the distribution pipe 308 runs over the evaporative pads. The distribution pipe 308 runs over the evaporative pads for uniform distribution of the fluid over the evaporative pads. Further, a second outlet 406 of the four-way diverter valve 302 may be connected to a drain orifice 312 via a third pipe 314. In one example, the drain

orifice 312 may be disposed on one of the side panels 106. In one example, the drain orifice 312 may have an extension so that an auxiliary pipe may be connected for draining out the stored fluid. Yet further, a third outlet 408 of the four-way diverter valve 302 may be connected to a fourth pipe 316 which opens into the tank 102. In one example, the fourth pipe 316 is a recirculation pipe 316. In one example, the recirculation pipe 316 may end just above the base of the tank 102 so as to provide effective turbulence effect.
[0051] For the purpose of evaporative cooling, the four-way diverter valve 302
is operated in a first setting of the plurality of settings for evaporative cooling. In the first setting, the four-way diverter valve 302 may direct the incoming fluid from the submersible pump 602 to the distribution pipe 308 via the second pipe 310. The distribution pipe 308 may circulate the incoming fluid over the evaporative pads of the cooling unit 100. The circulated fluid upon contacting with incoming air converts to vapours, since the incoming air passes heat to the fluid; thereby cooling itself and the cooled air is thrown out of the cooling unit.
[0052] For the purpose of descaling of scale formations within the cooling unit
100, a cleaning agent may be mixed with the fluid already filled in the tank 102 and the cooling unit 100 may be operated in the first setting. The four-way diverter valve 302 may direct the incoming fluid mixture, i.e., mixed with the cleaning agent, from the submersible pump 602 to the distribution pipe 308 via the second pipe 310. The distribution pipe 308 may circulate the incoming fluid mixture over the evaporative pads of the cooling unit 100, which then flows to the tank 102. The fluid mixture, when passes through the submersible pump 602, the second pipe 310, the distribution pipe 308, the evaporative pads and the tank 102, reacts with the scale formations within the the submersible pump 602, the second pipe 310, the distribution pipe 308, the evaporative pads and the tank 102, and further descales the scale formations. The cooling unit may be operated for a first prespecified time period for descaling the

scale formations within the cooling unit. In one example, the first prespecified time period may be thirty (30) minutes.
[0053] The cleaning agent may be introduced into the tank, when the scale
formations are visually identified on the surfaces of the tank 102, the evaporative pads and the pipes. In one example, a regular maintenance may be scheduled, in which the cleaning agent may be introduced within the tank 102 and the cooling unit 100 may continue the operation in the first setting of the four-way diverter valve 302. In one example, the cleaning agent may be manually added to the tank 102 in a prespecified amount. In an embodiment, 1% volume/volume of the cleaning agent can be added in tank 102 for removal of scales. In one example, the fan may be switched off in the first setting. In another example, the fan may be switched on in the first setting.
[0054] After operating in the first setting, the cooling unit 100 may be cleaned.
For cleaning of the cooling unit 100, the cooling unit 100 may be operated in a second setting of the plurality of settings. In the second setting, the four-way diverter valve 302 directs the incoming fluid from the submersible pump 602 to the recirculation pipe (fourth pipe) 316 for creating a fluidic turbulence within the tank 102. In one example, the fluid may be the combination of the water and the cleaning agent. The turbulent fluid when passes through the filter unit 304 leaves the lumps of scales onto the filter unit 304. The filter unit 304 may be a strainer. In one example, the cooling unit may be operated in the second setting for a second prespecified time period for cleaning of the cooling unit, in which the lump of scales nearly deposits onto the filter unit 304. In one example, the second prespecified time period may be fifteen minutes.
[0055] In one example, the four-way diverter valve 302 may be controlled from
outside by changing the orientation of the knob 210. In one example, the fan may be switched off in the second setting. In another example, the fan may be switched on in the second setting.

[0056] After operating in the second setting, the fluid may be drained out from
the tank 102. For the purpose of draining out the stored fluid from the tank 102, the
cooling unit 100 may be operated in a third setting of the plurality of settings. In the
third setting, the four-way diverter valve 302 may direct the incoming fluid from the
submersible pump 602 to the drain orifice 312. The drain orifice 312 acts as a
passage, through which the stored fluid is drained outside. The cooling unit 100 may
be operated in the third setting until the fluid stored in the tank is emptied. Further,
upon completely draining the incoming fluid, the filter unit 100 may be detached for
manual cleaning and may be replaced after the cleaning. In one example, the drained-
out fluid may be directed to a water storage means or to a further drainage means.
[0057] Further, upon draining the incoming fluid, the filter unit 304 may be
detached for manual cleaning and may be replaced upon the cleaning. In one example, the fan may be switched off in the third setting.
[0058] In an implementation of the present subject matter, the filter unit 304
may comprise an upper surface, a plurality of side surfaces and an opened base. In one example, the upper surface and side surfaces comprise filter meshes.
[0059] Although examples for the present disclosure have been described in
language specific to structural features and/or methods, it should be understood that the appended claims are not necessarily limited to the specific features or methods described. Rather, the specific features and methods are disclosed and explained as examples of the present disclosure.

I/We Claim:
1. A cooling unit (100) comprising:
a tank (102) for storing a fluid, wherein the tank (102) comprises a base (104), wherein the base (104) comprises a sump (108);
a submersible pump (602) positioned within the sump (108), wherein the submersible pump (602) comprises at least one inlet and at least one outlet for the fluid;
a four-way diverter valve (302) disposed within the cooling unit (100), wherein the four-way diverter valve (302) comprises an inlet (402) and three outlets (404, 406, 408); and
a filter unit (304) detachably disposed over the sump (108) such that the filter unit (304) covers the submersible pump (602) and the sump (108), wherein the filter unit (304) has at least one hole, through which a first pipe (306) connecting the at least one outlet of the submersible pump (602) with the inlet (402) of the four-way diverter valve (302) passes;
wherein the four-way diverter valve (302) is controlled to enable a plurality of settings for evaporative cooling, descaling of scale formations within the cooling unit (100), cleaning of the cooling unit (100), and draining out the stored fluid from the tank (102).
2. The cooling unit (100) as claimed in claim 1,
wherein the tank (102) comprises a plurality of side panels (106), one of the side panels (106) comprising an opening; and
wherein the four-way diverter valve (302) is disposed at the opening of one of the side panels (106).

3. The cooling unit (100) as claimed in claim 1, wherein the cooling unit (100)
comprises a plurality of side covers (202), one of the side covers (202) comprising an
opening; and
wherein the four-way diverter valve (302) is disposed at the opening of one of the side covers (202).
4. The cooling unit (100) as claimed in claim 1, wherein a surface of the base (104)
adjoining the sump (108) is tapered to flow the fluid into the sump (108).
5. The cooling unit (100) as claimed in claim 1, wherein the cooling unit (100)
comprises evaporative pads;
wherein a first outlet (404) of the four-way diverter valve (302) is connected to a distribution pipe (308) via a second pipe (310), wherein the distribution pipe (308) runs over the evaporative pads.
6. The cooling unit (100) as claimed in claim 1, wherein a second outlet (406) of the four-way diverter valve (302) is connected to a drain orifice (312) via a third pipe (314), wherein the drain orifice (312) is disposed on one of the side panels (106).
7. The cooling unit (100) as claimed in claim 1, wherein a third outlet (408) of the four-way diverter valve (302) is connected to a fourth pipe (316) which opens into the tank (102).
8. The cooling unit (100) as claimed in claim 1, wherein, in a first setting of the plurality of settings, the four-way diverter valve (302) directs the incoming fluid from the submersible pump (602) to the distribution pipe (308) via the second pipe (310) for the evaporative cooling and the descaling of scale formations within the cooling unit (100).
9. The cooling unit (100) as claimed in claim 1, wherein, in a second setting of the plurality of settings, the four-way diverter valve (302) directs the incoming fluid from the submersible pump (602) to the fourth pipe (316) for creating a fluidic turbulence

within the tank (102) so that the turbulent fluid when passes through the filter unit (304) leaves scales onto the filter unit (304) for cleaning the cooling unit (100).
10. The cooling unit (100) as claimed in claim 1, wherein, in a third setting of the plurality of settings, the four-way diverter valve (302) directs the incoming fluid from the submersible pump (602) to the drain orifice (312) for draining out the stored fluid from the tank (102).
11. The cooling unit (100) as claimed in claim 1, wherein the fluid is water.
12. The cooling unit (100) as claimed in claim 1, wherein the fluid is a combination of water and a cleaning agent.
13. The cooling unit (100) as claimed in claim 1, wherein the sump (108) comprises a drain plug (604) on a surface thereof.
14. The cooling unit (100) as claimed in claim 1, wherein the filter unit (304)
comprising an upper surface, a plurality of side surfaces and an open base.
15. The cooling unit (100) as claimed in claim 14, wherein the upper surface and the
plurality of side surfaces comprise filter meshes.
16. The cooling unit (100) as claimed in claim 1, wherein the cooling unit (100) comprises a fluid pouring inlet (206) on one of the side panels (106).
17. The cooling unit (100) as claimed in claim 14, wherein the fluid pouring inlet (206) is provided on a top edge of the one of the side panels (106).