DESC:FIELD OF INVENTION
The present invention Hot Air Ventilator relates to ventilation system for automotive cabin to retain a comfortable temperature within a vehicle during hot days when a user leaves the vehicle at outdoor, exposed to sun.

BACKGROUND OF THE INVENTION
Generally, when vehicle is parked outdoor for long time, particularly in sunny days then Inside Cabin becomes very Hot. It’s become hotter than the outside; sometime it reaches to 60°~ 70°C, because air inside the cabin is getting heated up continuously by outer panels of vehicle, mainly roof & sidebody & Windshield glass which are directly exposed to sun. Electronics or sensitive automotive gadgets, Interior trim, leather seat-cover, Dash-board and other plastic parts deteriorate because high temperature and also creates toxic fumes. When user enters to Vehicle, he/she feels very hot, uneasy & discomfort. Even vehicle’s air conditioner takes more time to cool the cabin.

PRIOR ART
A type of Vehicle ventilating Devices is known in the prior art. It is temporarily placed on the Window glass by maintaining some gap at above side. This Solar Window ventilator, merely blows hot air out of the car through its exhaust vent, and sucks presumably cooler air into the car through its intake vent. Solar Window ventilator has following limitations –
1. Solar Window ventilators require small opening or Gap on window glass for mounting of device, which could conceivably invite thieves to easily open vehicle. Also it cannot be used in the rainy season as water may get enter in case of sudden rain.
2. It does not work with tinted window.
3. Vehicle must park such that Solar Window ventilator can get direct sun light. As the sun light direction keeps changing & gets away then it may not work.
4. Must be removed for driving as it will block vision of either side window.

OBJECTS OF THE INVENTION
Primary object of the present invention is to provide a ventilation system for automotive Cabin which evacuates Hot air from automotive Cabin & retaining a comfortable temperature when it is parked outdoor at high temperature.
Another objective of this invention is to provide ventilation only in vehicle switched Off condition without added fuel or battery consumption and using only by solar energy.

Further object of invention to provide fixed & rigid mounting of ventilation system on vehicle body so that it cannot be stolen when is parked outside.

A distinct feature feature of this invention is – It’s mounting position which is the roof. As Hot air always moves to top, it is mounted on top of the Cabin that is Roof. Thus hottest air always is getting sucked from upper side of cabin.

It has an advantage that invention functionality does not depend upon vehicle parking orientation or sun light direction as it is mounted on roof.

An even further object of the present invention is to provide a Hot Air Ventilator which is susceptible of a low cost of manufacture with regard to both materials and labor, and which accordingly is then susceptible of low prices of sale to the consuming public, thereby making such Hot Air Ventilator economically available to the buying public.

It has also following advantages -
1. It does not depend upon the Window glass condition, whether tinted or otherwise.
2. It’s functionality does depend upon the Parking condition with respect to sun position.
3. It does not block vision as it is mounted on the Roof.
4. There is no problem of Water leakage.
5. It eliminates the Toxic fumes & reduces deterioration of vehicle interior.
6. It enhances health & comfort.
7. Less work and time is required for vehicle cabin’s air conditioner to perform at vehicle start-up,

These together With other objects of the invention, along with the various features of novelty which characterize the invention, are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and the specific objects attained by its uses, reference should be had to the accompanying drawings and descriptive matter in which there is an illustrated preferred embodiment of the invention.

SUMMARY OF THE INVENTION
In view of the foregoing disadvantages inherent in the known types of Solar Window ventilator in prior art, the present invention provides a permanently Fixed type of Solar Powered Hot Air Ventilator mounted on Roof of Automotive cabin, wherein the same is used for ventilating the Hot air & maintaining a comfortable temperature within a vehicle during hot days When a user leaves the vehicle out door, exposed to sun.
The present invention comprises of a stylish housing mounted on the Roof. Housing has opening from two sides, one side connected with Cabin through hole on roof, where a small exhaust fan is mounted and another side opened to atmosphere. It also comprises solar panels electrically connected to small exhaust fan for providing electrical energy. And also it comprises a sensor to give signal to exhaust fan for switching ON-OFF by sensing the ‘ON-OFF’ condition of vehicle using current supply on harness for tail lamp. Only and only when Vehicle is in OFF condition then sensor gives signal to exhaust Fan for switching ON and vice versa. If Vehicle is parked out door and getting heated then Solar panel supplies current to Fan and Hot Air Ventilator starts to suck out the hot air thus it gets auto activate.

There has thus been outlined, rather broadly, the more important features of the invention in order that the detailed description thereof that follows may be better understood, and in order that the present contribution to the art may be better appreciated. There are additional features of the invention that will be described hereinafter and Which Will form the subject matter of the claims appended hereto.

In this respect, before explaining at least one embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and to the arrangements of the components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced and carried out in various Ways. Also, it is to be understood that the phraseology and terminology employed herein are for the purpose of description and should not be regarded as limiting. As such, those skilled in the art will appreciate that the conception, upon which this disclosure is based, may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present invention. It is important, therefore, that the claims be regarded as including such equivalent constructions in so far as they do not depart from the spirit and scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood and objects other than those set forth above Will become apparent When consideration is given to the following detailed description thereof Such description makes reference to the annexed drawings Wherein:
FIG. 1 shows an outlook view of Hot Air Ventilator mounted on vehicle.
FIG. 2 shows a perspective view of Hot Air Ventilator mounted on roof.
FIG. 3 shows an exploded illustration of Hot Air Ventilator.
FIG. 4 shows sensor function & electric supply in various conditions.
FIG. 5 shows perspective section view in assembled condition.

Following reference numerals indicate corresponding parts in shown in above figures:
• Roof of automotive cabin-10
• Hot Air Ventilator-20
• Housing-21
• Adhesive tape-22
• Small Exhaust Fan-30
• Screws-31
• Solar Panel-40
• Sensor-50
• Harness terminal from vehicle-11

DESCRIPTION OF THE PREFERRED EMBODIMENT
With reference now to the drawings, and in particular to FIG-1 Hot Air Ventilator embodying the principles and concepts of the Present invention and generally designated by the reference numeral 20 will be described.
Hot Air Ventilator-20 comprises of Stylish Housing-21 which is fixed on top of the Roof of automotive cabin-10 with help of double sided adhesive tape-22 which makes it water leak proof. Housing-21 has two side openings, upper end, which is smaller in size opened to atmosphere wherein lower end which is bigger in size connected to Cabin-10. Hot Air Ventilator-20 comprises of Small Exhaust Fan-30 to suck out the hot air from Cabin, which is mounted on lower end of Housing-21, with help of screws-31.
It also comprises of solar panel-40 mounted on upper surface of Roof, Which provides Electrical energy to small exhaust fan-20. And also it comprises a sensor-50 to sense the ‘ON-OFF’ condition of vehicle by sensing the electrical current supply on harness to tail lamp-11. Thus it gives signal to exhaust fan for switching ON-OFF (refer FIG-4). When Vehicle is in OFF condition then sensor gives signal to exhaust Fan to switch ON; and when Vehicle is in ON condition then sensor does not give signal to exhaust Fan & it remains OFF; refer condition.
Means when vehicle is in running condition, small exhaust fan-20 will be in OFF condition, Hot Air Ventilator-20 will not work & therefore the Air-conditioner performance of vehicle will not be affected because of any air leakage.
If Vehicle is out door parked on hot SUN then vehicle panels start getting heated and air inside the Cabin also getting heated gradually. Simultaneously Solar Panel-40 start to convert solar energy into Electrical energy & supplying it to Small exhaust Fan-20. And then Small exhaust Fan-20 starts to suck out the Air from Upper side of Cabin which is comparatively hotter because Hot air always moves up because it is lighter than cold air. In this way, Hot Air Ventilator keeps on sucking hot air from Vehicle & making cabin comparatively cooler.

WORKING CONDITION IN BRIEF (with reference to FIG-4)
Condition (a):
Vehicle running + irrespective of environment = Hot Air Ventilator NOT work

Condition (b):
Vehicle OFF + Parked out on SUN = Hot Air Ventilator works

Condition (c):
Vehicle OFF + Parked inside or night = Hot Air Ventilator NOT work

Thus Hot Air Ventilator works only & only when vehicle is parked outside exposed to SUN.
As to a further discussion of the manner of usage and operation of the present invention, the same should be apparent from the above description. With respect to the above description, it is to be realized that the optimum dimensional relationships for the parts of the invention, to include variations in size, materials, shape, form, function and manner of operation, assembly and use, are deemed readily apparent and obvious to one skilled in the art, and all equivalent relationships to those illustrated in the drawings and described in the specification are intended to be encompassed by the present invention.
Therefore, the foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention.
,CLAIMS:WE CLAIM:
1. A Hot Air Ventilator comprising:
a) A Housing, which is fixed on top of the Roof of automotive cabin and it has two side openings, upper end which is opened to atmosphere & lower end which is connected to Cabin through the hole on said Roof;
b) A Small Exhaust Fan to suck out the hot air from Cabin, which is mounted on lower end of said Housing, with help of fasteners;
c) Solar panels mounted on upper surface of Roof, Which is electrically connected to said small exhaust fan & provides Electrical energy;
d) A sensor placed inside the said housing, which electrically connects to said solar panel with said Small exhaust fan; and it gives signal to said small exhaust fan to switch ‘OFF-ON’.
2. A Hot Air Ventilator as claimed in claim 1 wherein housing is a stylish casing in which said Small exhaust Fan & said Sensor are mounted and it is placed on the top of automotive cabin at outside with help of double sided adhesive tape such that upper end is opened to atmosphere & lower end is connected to Cabin.
3. A Hot Air Ventilator as claimed in claim 1 wherein Small exhaust fan evacuates the hot air in the cabin from upper side to outwards as hot air always moves upside.
4. A Hot Air Ventilator as claimed in claim 1 wherein Solar panel supplies electrical current only when Vehicle parked outside & it is exposed to Sun; and Solar panel does not supply electrical current when Vehicle is not parked outside.
5. A Hot Air Ventilator as claimed in claim 1 wherein Sensor is placed in between said Small exhaust fan and said Solar panel to control the running of Small exhaust fan by sensing the electric current supply on harness for tail lamp and accordingly gives signals to said small exhaust fan to switch ‘OFF-ON’; when vehicle is in OFF condition & there is no supply of electrical current in harness of tail lamp from battery then sensor gives signal to Exhaust fan to switch ON; and when Vehicle is in running condition & there is supply of electrical current in harness of tail lamp from battery then sensor does not give signal to Exhaust fan to switch ON and remain switch OFF.
6. A Hot Air Ventilator as claimed in any of the preceding claims, wherein Hot Air Ventilator works only & only when vehicle is parked outside & exposed to sun & cabin is getting heated; it does work if vehicle is in running condition or vehicle is not parked outside exposed to sun.
7. A Hot Air Ventilator substantially as herein described with reference to the accompanying drawing.