FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[See section 10, Rule 13]
A COOLING SYSTEM AND METHOD FOR
HEAT GENERATING
ELECTRONIC/ELECTRICAL OBJECTS;
BLUE STAR LIMITED A COMPANY INCORPORATED UNDER THE COMPANIES ACT, 1956, WHOSE ADDRESS IS KASTURl BUILDINGS, MOHAN T. ADVANI CHOWK, JAMSHETJI TATA ROAD, MUMBAI - 400 020, MAHARASHTRA, INDIA
THE FOLLOWING SPECIFICATION
PARTICULARLY DESCRIBES THE
INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED.

FIELD OF INVENTION
The present invention generally relates to cooling for heat generating
Electronic/electrical objects. More particularly, the invention provides humidity controlled
cooling for Electronic/electrical objects.
BACKGROUND OF INVENTION
The presence of humidity on electronic objects like components/circuits of electronic
equipments is conductive to corrosion.
Equipment such as a mechanical or electrical device may not function properly if it is
subjected to moisture or condensation. Enclosures may protect such devices from
dripping water on the outside but may not prevent direct condensation from forming
inside the enclosure, for example, during extreme temperature cycling.
Further, the daytime use of electronic objects in conditions of relative humidity
approaching saturation favors the infiltration of humidity in the objects and the deposit of
water molecules on the circuits and/or components of the said objects. Some of these

molecules are deposited on metallic parts forming circuits and/or electronic components, thus causing an oxidation of the said circuits or components. The oxidation of electronic circuits or components can thus be substantial and cause sometimes irreversible malfunctions.
When the environment around an enclosure cools, the inside walls of the enclosure also cool and the air inside may eventually cool. When the inside air cools, the relative pressure inside the enclosure may drop, drawing external air into the enclosure {e.g., through leaks in the enclosure), for example, when the enclosure is rapidly cooled in a rainstorm. The external air may be near 100% relative humidity. The relative humidity of the air inside the enclosure may eventually reach the relative humidity of the external air outside the enclosure, and when cooled further, may cause condensation inside of the enclosure.
Further, as need for high end computing is rising, electronic circuits/components are becoming more compact resulting into high heat generation. The dissipation of this heat is essential, considering the safe working of the components and the device inclusive.

For these type of cooling needs air cooling (generally for low heat low end applications), Water cooling (for high heat and high end applications), refrigerant cooling (for very high end and high heat with more compact applications) are employed. Also, the combinations to these can also be used.
Generally, in induced cooling systems, it is observed that the dew formation happens on the electronic components/ circuits as the temperature of air surrounding the circuit falls below the dew point or the dew point of air rises to the air temperature. This can happen in one or many conditions as, electronic component fails to generate heat and heat dissipation system or cooling system continues to work with full capacity or temperature control systems of cooling devices partially fail to deliver the output or Room air conditioning fails to maintain the humidity content or application of the device itself needs humidity content in air or applications or regions where air-conditioning with humidity control is not possible or any condition irrespective the cause which brings the humid air in contact with the electronic devices, inclusive or exclusive of above.

It is therefore required to provide a system that overcomes the shortcomings associated
with the prior art technologies for heat generating Electronic/ electrical objects.
SUMMARY OF THE INVENTION
Accordingly, the present invention provides a cooling system for electronic or electrical
objects. The system comprises a housing having at least one inlet and at least one
outlet, at least one cooling unit in the housing for adapting at least one electronic or
electrical object, at least one fan for regulating air flow in the housing; at least one
dehumidification unit adapted at each inlet means for removing moisture from air; and a
controller adapted to detect a temperature signal indicating the temperature inside the
system and selectively actuating a fan for inlet and outlet of air.
DESCRIPTION OF THE DRAWINGS
The features, aspects and other advantages of the present invention will become better
understood when the following description is read with reference to the accompanying
drawings, wherein:
Figure 1 shows the system with air blow through arrangement as per one embodiment.

Figure 2 shows the system with air suck through arrangement as per another embodiment.
DESCRIPTION OF THE INVENTION
The present invention relates to a Cooling system and method for heat generating
Electronic/Electrical objects.
Various embodiments of the present invention provide a cooling system for electronic or
electrical objects. The system comprises a housing having at least one inlet and at least
one outlet, at least one cooling unit in the housing for adapting at least one electronic or
electrical object, at least one fan for regulating air flow in the housing; at least one
dehumidification unit adapted at each inlet means for removing moisture from air; and a
controller adapted to detect a temperature signal indicating the temperature inside the
system and selectively actuating a fan for inlet and outlet of air.
In an embodiment the cooling circuit of the dehumidification circuit for passing a
refrigerant to facilitate cooling extends through the cooling unit to pass same coolant in
the dehumidification unit and cooling unit.
In an embodiment the coolant can be water, coolant or refrigerant.

The fan of the present invention is adapted at each inlet or at each outlet.
In an embodiment of the present invention, the fan adapted at the inlet is a fan blower.
In an embodiment, the fan adapted at the outlet is an exhaust fan.
In an embodiment the system of the present invention further comprises a heater coil for
reheating the chilled/cooled air adapted to the dehumidification unit.
In an embodiment the system of the present invention further comprises a mist
eliminator is connected to the dehumidification unit for absorbing water droplets. The
mist eliminator may be a demister pad or the like.
In an embodiment, the system includes an air filter for clearing the dust from the air.
In an embodiment, the system of the present invention includes temperature sensors,
drain tray for condensate.
As per one exemplary embodiment the system provides two arrangements namely
forced air cooling arrangement using blower fan and air suck through arrangement
using cooling/exhaust fan.

Referring to Fig. 1 and 2, cooling system (100) is provided in accordance with an
embodiment of the present invention. The system (100) includes a housing (100a)
cooling unit (10), dehumidification unit (20), a blower fan (30a) or cooling fan (30b),
conduit (40) for refrigerant flow, air filter (50), mist eliminator (60) to retain any existing
mist and a drain tray (70) for condensate is shown.
The air filter (50) filters the incoming air to prevent dust or particulate matter form
entering in the housing (100a).
As per one embodiment the mist eliminator (60) pad has several layers of wire mesh.
The wire mesh may be configured with varying sizes, weaving and bulk density.
As per one embodiment the system of Fig. 1 provides forced air cooling arrangement
using a blower fan (30a) for passing air over the electronic devices/ components placed
on the equipment cooling unit. The air flow path and the flow path of cooling refrigerant
through the conduit are shown in Fig. 1.
As per another embodiment the system of Fig. 2 provides air suck through arrangement
using a cooling/exhaust fan (30b) for allowing the air to pass over the electronic

devices/components placed on the equipment cooling unit. The air flow path and the
flow path of cooling refrigerant through the conduit are shown in Fig. 2.
As per one embodiment the system having a coolant or refrigerant cooled unit uses the
part or whole of the coolant or refrigerant for dehumidifying air flowing over the
electronic devices/components.
In an advantageous aspect the potential moist air which may lead to dew formation on
the electronic components gets dehumidified and electronic components are safe in
case electronic component fails to generate heat and heat dissipation system or cooling
system continues to work with full capacity. Further, even if the temperature control
systems of cooling devices partially fail to deliver the output the system of the present
invention works properly.
The system is configured to operate even if room air conditioning fails to maintain the
humidity content. Further, even if application of the device itself needs humidity content
in air the system works properly.

The significant advantage of the present system is that it provides use of the high end electronic devices in the regions where air-conditioning with humidity control is not possible. Further, in case of failure of room air conditioning, the devices will not get affected and Low end Control in cooling device (for refrigerant / coolant) can also be employed.
While the invention has been described with respect to presently preferred embodiment, it will be understood that the invention can be applied to numerous forms of applications involving humidity control for electrical/electronic devices. Accordingly, the principles of the invention are not limited to the embodiment described. The invention is capable of certain modification and change without departing from the spirit of the invention.

We Claim
1. A cooling system for electronic or electrical objects, the system comprising:
a housing having at least one inlet and at least one outlet;
at least one cooling unit in the housing for adapting at least one electronic or electrical object;
at least one fan for regulating air flow in the housing;
at least one dehumidification unit adapted at each inlet means for removing moisture from air; and
a controller adapted to detect a temperature signal indicating the temperature inside the system and selectively actuating a fan for inlet and outlet of air.
2. The system as claimed in claim 1 wherein cooling circuit of the dehumidification
circuit for passing a refrigerant to facilitate cooling extends through the cooling
unit to pass same coolant in the dehumidification unit and cooling unit.

3. The system as claimed in claim 2 wherein the coolant can be water, coolant or refrigerant.
4. The system as claimed in claim 1, wherein the fan is adapted at each inlet or at each outlet.
5. The system as claimed in claim 4, wherein the fan adapted at the inlet is a fan blower.
6. The system as claimed in claim 4, wherein the fan adapted at the outlet is an exhaust fan.
7. The system as claimed in any one of the preceding claims further comprises a heater coil for reheating the chilled/cooled air adapted to the dehumidification unit.

8. The system as claimed in any one of the preceding claims further comprises a mist eliminator is connected to the dehumidification unit for absorbing water droplets.
9. The system as claimed in claim 1, wherein the system includes an air filter for clearing the dust from the air.