FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
As amended by the Patents (Amendment) Act, 2005
AND
The Patents Rules, 2003
As amended by the Patents (Amendment) Rules, 2005
COMPLETE SPECIFICATION (See section 10 and rule 13)
TITLE OF THE INVENTION
A solar energy enhanced hybrid oven system
APPLICANTS :
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai 400 030, Maharashtra, India, an Indian Company
INVENTOR (S):
Sharma Neeraj, of Crompton Greaves Ltd, Crompton Greaves Ltd, machine (M7) Division, D-5 Industrial Area, MPAKVN, Mandideep-462046, Madhya Pradesh, India; an Indian National.
PREAMBLE TO THE DESCRIPTION:
The following specification particularly describes the nature of this invention and the manner in which it is to be performed:

Field of the Invention:
This invention relates to the field of ovens and solar energy.
Particularly, this invention relates to a solar energy enhanced hybrid oven system.
Background of the Invention:
In the electrical equipment industry or switchgear industry, ovens are used. One of the uses of ovens is to baking windings of a transformer.
Ovens are used for heating purpose to process job according to requirement / specification / process of the Ht / Lt / DC / Traction motor manufacturing. Ovens can be electric powered or thermal powered. Either way, dependency on conventional fuels increases cost.
Current developments in alternative fuels supplies have paved the way for 'green' technology; one which does not harm the environment, one which is abundantly and freely available, and one which can be efficiently harnessed. Harnessing of such a technology has always been a challenge and an impediment to develop associated assemblies around it.
There is a need for an efficient, economic, and 'green' system.
Prior Art:
US4556103 discloses a Heat exchange apparatus with blower and helical conduit system. A fluid based heat transfer medium is provided to piping's which are used for connecting heat exchange device and heat storage tanks.

US4681154 discloses a Heat accumulating material enclosing container and heat accumulating apparatus. The heat transfer medium is fluid. The fluid is transferred through a heat collecting return pipe from a radiator to heat collecting portion.
Each of the above patents is fluid based.
US5335447 discloses a thermally efficient integrated greenhouse system. Air to be heated is fed to the upper surface of the absorber between each pair of adjacent corrugations by means of inlet pipes.
The technology and oven of the prior art includes the following deficiencies:
1) Fluid bases, thereby monitoring amount of fluid at all times;
2) Dependency on an external source of power;
3) Loss of temperature and time in cases of power cut.
Objects of the Invention:
An object of the invention is to provide a clean and green oven / heating / baking system.
Another object of the invention is to reduce heating time.
Yet another object of the invention is to provide an efficient oven system.
Still another object of the invention is to provide a continuous oven system.

An additional object of the invention is to reduce electricity consumption of an oven system.
Yet an additional object of the invention is to provide reduction in time required for temperature rise in an oven system.
Still an additional object of the invention is to provide a hybrid oven system which uses conventional electrical energy and solar energy.
Summary of the Invention:
According to this invention, there is provided a solar energy enhanced hybrid oven system comprises:
a. baking chamber adapted to receive items upon which heat is to be irradiated,
said baking chamber being lined with electrically operated heaters along its
walls and further including openings to receive hot air;
b. green house chamber adapted to trap solar radiation, said green hous chamber
including blackened surfaces for heat trapping and blackened corner surfaces
to receive the heat collectively;
c. first pipe means, connected from each of said blackened corner surfaces,
adapted to transfer hot air from said green house chamber to said baking
chamber to be released through said openings of said baking chamber; and
d. second pipe means adapted to transfer relatively cold air from said baking
chamber to said green house chamber .

Typically, said green house chamber is a glass walled chamber.
Typically, said system includes at least one blower adapted to assists transfer of air from said green house chamber to said baking chamber.
Typically, said system includes control means adapted to monitor and control temperatures in the baking chamber. Typically, control of air flow from one chamber to another regulates the temperature.
According to this invention, there is provided a method of providing a solar energy based hybrid oven system, said method comprises the steps of:
a. providing a baking chamber adapted to receive items upon which heat is to be
irradiated;
b. lining said electrically operated heaters along the walls of said baking chamber;
c. providing openings on walls of said baking chamber to receive hot air;
d. trapping solar radiation in a green house chamber by providing blackened
surfaces for heat trapping;
e. collecting heat through blackened corner surfaces of said green house chamber;
f. transferring hot air from said green house chamber to said baking chamber
through a first pipe means, connected from each of said blackened corner
surfaces;
g. releasing said transferred hot air through openings of said baking chamber; and
h. transferring relatively cold air from said baking chamber to said green house
chamber through a second pipe means.

Brief Description of the Accompanying Drawings:
The invention will now be described in relation to the accompanying drawings, in which:
Figure 1 illustrates a schematic of the oven system.
Detailed Description of the Accompanying Drawings:
According to this invention, there is provided a solar energy enhanced hybrid oven system.
Figure 1 illustrates a schematic of the oven system (100).
In accordance with an embodiment of this invention, there is provided a baking chamber (12) of an oven. Typically, this baking chamber (12) receives items upon which heat is to be irradiated. It serves as the housing for the oven. This baking chamber is lined with heaters (14) along the walls. Primarily, they are lined along the walls of the chamber. These heaters are typically electrically operated.
In accordance with another embodiment of this invention, there is provided a green house chamber (16) adapted to trap solar radiation. Green house system is the system, on which when solar radiation falls, it gets trapped inside and heats the air inside the system. Typically, this chamber is a glass walled chamber. Glasses have property of converting short waves into long waves when radiation passes through the glass. These radiation waves inside chamber can be concentrated by placing blackened corner surfaces (22) which receive the heat collectively. The surface

(24) of green house system is black painted so that more radiation can be captured inside the system
In accordance with yet another embodiment of this invention, there is provided a first pipe means (18) adapted to transfer hot air from said green house chamber (16) to said baking chamber (12). A blower (20) assists the transfer. The pipe means communicably couple said green house chamber (16) to said baking chamber (12). The pipes are adequately insulated to avoid loss of heat while transfer. The pipes, typically, are connected to the blackened corner surfaces (22) of the green house chamber (16).
Reference numeral (28) refers to hot air openings (from the pipe) in the baking chamber.
In accordance with still another embodiment of this invention, there is provided a second pipe means (26) adapted to transfer relatively cold air from the baking chamber (12) to the green house chamber (14).
In accordance with an additional embodiment of this invention, there is provided a control means adapted to monitor and control temperatures in the baking chamber. Typically, control of air flow from one chamber to another regulates the temperature.
The dotted arrows depict the flow of air. Solar radiation concentration, towards the corners, is depicted by reference numeral (30).

According to an exemplary embodiment, the previous calculated time for a prior art oven for temperature rise was more than 8 hrs. By the use of the system of this invention, there is a reduction by about 4 hrs with substantial savings in energy consumption, too.
The incorporation of this green house system reduces the time required for temperature rise in oven. The oven can be continuously utilized by maintaining the chamber temperature due to solar irradiation from the green house chamber.
While this detailed description has disclosed certain specific embodiments of the present invention for illustrative purposes, various modifications will be apparent to those skilled in the art which do not constitute departures from the spirit and scope of the invention as defined in the following claims, and it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.

We claim,
1. A solar energy enhanced hybrid oven system comprising:
a. baking chamber adapted to receive items upon which heat is to be
irradiated, said baking chamber being lined with electrically operated
heaters along its walls and further including openings to receive hot air;
b. green house chamber adapted to trap solar radiation, said green hous
chamber including blackened surfaces for heat trapping and blackened
corner surfaces to receive the heat collectively;
c. first pipe means, connected from each of said blackened corner surfaces,
adapted to transfer hot air from said green house chamber to said baking
chamber to be released through said openings of said baking chamber;
and
d. second pipe means adapted to transfer relatively cold air from said
baking chamber to said green house chamber .
2. A system as claimed in claim 1 wherein, said green house chamber is a glass walled chamber.
3. A system as claimed in claim 1 wherein, said system includes at least one blower adapted to assists transfer of air from said green house chamber to said baking chamber.
4. A system as claimed in claim 1 wherein, said system includes control means adapted to monitor and control temperatures in the baking chamber. Typically, control of air flow from one chamber to another regulates the temperature.

5. A method of providing a solar energy based hybrid oven system, said method comprising the steps of:
a. providing a baking chamber adapted to receive items upon which heat is
to be irradiated;
b. lining said electrically operated heaters along the walls of said baking
chamber;
c. providing openings on walls of said baking chamber to receive hot air;
d. trapping solar radiation in a green house chamber by providing blackened
surfaces for heat trapping;
e. collecting heat through blackened corner surfaces of said green house
chamber;
f. transferring hot air from said green house chamber to said baking
chamber through a first pipe means, connected from each of said
blackened corner surfaces;
g. releasing said transferred hot air through openings of said baking
chamber; and
h. transferring relatively cold air from said baking chamber to said green house chamber through a second pipe means.