FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION A Submerged Condenser Assembly
APPLICANTS
TATA MOTORS LIMITED, an Indian company
having its registered office at Bombay House,
24 Homi Mody Street, Hutatma Chowk,
Mumbai 400 001 Maharashtra, India
INVENTOR
Abhijit P Dube
All Indian national
of TATA MOTORS LIMITED an Indian company
having its registered office at Bombay House,
24 Homi Mody Street, Hutatma Chowk,
Mumbai 400 001 Maharashtra, India
PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the
manner in which it is to be performed.

A Submerged Condenser Assembly Field of invention:
The present invention relates to air conditioning system and more particularly it relates to a submerged condenser assembly for automobiles.
Background of invention:
In the air conditioner of automobiles, .the condenser is used as heat exchanger which dissipates the heat of compressed refrigerant received from compressor. The refrigerant further flows to thermo static expansion valve (TXV) and evaporator and returns back to compressor. The system is therefore a close system.
The condenser is preferably mounted in front of the vehicle and carries a fan in order to enhance the heat rejection through ram air and further heat rejection is facilitated or supported by fan provided for the same.
The said fan can be a pusher fan- pushing the air from front of the vehicle across condenser towards engine compartment or the fan can be puller type -pulling the air from front of the vehicle.
The conventional condenser assembly needs to be mounted in a position such that it get ram air. The said condenser assembly further needs assistance from fan to blow air across said condenser. The said fan draws current from battery and in turn, engine has to work more to drive the alternator to generate the current required to run the fan.
The running of the fan causes, noise, vibration in the vehicle causing discomfort to the driver. Cost and weight of the condenser fan are addition to the vehicle.
The present invention is developed to provide a submerged condenser assembly which reduces the noise and vibration of vehicle and also reduces the cost and weight of the vehicles.

Object of invention:
The main object of the present invention is to provide a submerged condenser assembly.
Another object of the present invention is to provide a submerged condenser assembly which eliminates the condenser fan required for heat rejection.
Another object of the present invention is to provide a submerged condenser assembly which reduces the noise and vibration of the vehicle and provides comfort to users or drivers.
Yet another object of the present invention is to provide a submerged condenser assembly which is cost effective and less in weight.
Statement of Invention:
A Submerged condenser assembly comprises; a condenser 01, coolant means 02, auxiliary tank 03, pump 05 for pumping the coolant means 02, jacket housing 07 filled with said coolant means 02, wherein said condenser 01 is disposed inside said jacket housing 07 and submerged in said coolant means 02 for dissipating the heat from refrigerant flowing through said condenser.
The condenser assembly, in accordance with this invention, wherein said jacket housing 07 is having inlet port 06 and outlet port 04 connected to said pump 05 for pumping the said coolant means 02, said condenser 01 is having inlet 8a and outlet 8b for refrigerant to flow in and out of said condenser 01.
The condenser assembly, in accordance with this invention, wherein said inlet 8a and outlet 8b of said condenser are connected to heating ventilation air conditioning (HVAC) circuit of vehicle by means of connectors the AC compressor outlet which is high pressure discharge line is connected to condenser inlet 8a and condenser

outlet 8b which is liquid line is connected to receiver dryer if available or directly to expansion valve inlet.
The condenser assembly , in accordance with this invention, wherein said outlet port 04 of the said jacket housing 07 comprises a temperature sensor with valve arrangement 4a which is normally closed to maintain liquid heat exchanging means 02 in the said jacket housing 07.
Alternatively, a submerged condenser assembly comprises; a first tube member la, second tube member 1 b, auxiliary tank 03, pump 05 for pumping the coolant means 02, wherein said first tube member 01 and said second tube member 02 are a tube -in - tube structure which are co-axial tubes, said first tube member la carrying the compressed refrigerant disposed inside the second tube member lb carrying the liquid heat exchanging means 02 which dissipates the heat from refrigerant flowing through said first tube member 01.
The condenser assembly, in accordance with this invention, wherein said submerged condenser assembly is mounted on vehicle, either in frontal area or on the back wall of vehicle with suitable mounting arrangements.
The condenser assembly , in accordance with this invention, wherein said auxiliary tank 03 is having a swiveling mechanism 3a to convert the hot liquid in to small droplets which is sprinkled over the fins provided inside the said auxiliary tank 03 for reducing the temperature of the liquid due to the swiveling and sprinkling of the liquid.
The condenser assembly, in accordance with this invention, wherein said auxiliary tank 03 comprises an exhaust means 3b which is an exhaust fan mounted preferably on top of the said auxiliary tank 03 in order to further reduce the temperature of the liquid by taking out heat from the liquid.
Brief description of invention:

In accordance with the present invention, submerged condenser assembly comprises; a condenser 01, coolant means 02, auxiliary tank 03, pump 05 for pumping the coolant means 02, jacket housing 07 filled with said coolant means 02, wherein said condenser 01 is disposed in said jacket housing 07 and submerged in said coolant means 02 for dissipating the heat from refrigerant flowing through said condenser.
Said jacket housing 07 is having inlet port 06 and outlet port 04 connected to said pump 05 for pumping the said coolant means 02. Said condenser 01 is having inlet 8a and outlet 8b for refrigerant to flow in from compressor and out of said condenser 01 to receiver drier.
Alternatively said submerged condenser assembly comprises; a first tube member la, second tube member lb, auxiliary tank 03, pump 05 for pumping the coolant means 02, wherein said first tube member la and said second tube member lb are a tube - in - tube structure which are co-axial tubes, said first tube member la carrying the compressed refrigerant disposed inside the second tube member lb carrying the liquid heat exchanging means 02 which dissipates the heat from refrigerant flowing through said first tube member la.
Brief Description of the Drawing:
Figure-01 shows the submerged condenser assembly in accordance with the present invention.
Figure-02 shows the exploded view of submerged condenser assembly in accordance with the present invention.
Figure-03 shows the exploded view of tube in tube structure of submerged condenser assembly in accordance with the present invention.
Detailed description of Invention:

Referring now to the drawings wherein the showings are for the purpose of illustrating a preferred embodiment of the invention only, and not for the purpose of limiting the same.
In accordance with the present invention, submerged condenser assembly comprises; a condenser 01, coolant means 02, auxiliary tank 03, pump 05 for pumping the coolant means 02, jacket housing 07 filled with said coolant means 02, wherein said condenser 01 is disposed in said jacket housing 07 and submerged in said coolant means 02 for dissipating the heat from refrigerant flowing through said condenser.
Said jacket housing 07 is having inlet port 06 and outlet port 04 connected to said pump 05 for pumping the said coolant means 02. Said condenser 01 is having inlet 8a and outlet 8b for refrigerant to flow in from compressor and out of said condenser 01 to receiver drier respectively.
Now referring to figure-01, the said condenser 01 is enclosed by the said Jacket housing 07 which is filled with heat exchanging coolant means 02. The inlet 08a and outlet 08b of said condenser are connected to AC circuit by means of connectors. The said inlet 8a and outlet 8b are protruding out from the said jacket housing 07.
When the heat from refrigerant flowing through the said condenser 01 is required to be exchanged, the said pump 05 starts supplying the said coolant means 02 to said jacket housing 07 which already stocks some quantity of coolant inside. The said pump 05 supplies said coolant to the said jacket housing 07 with the help of inlet port 06 provided.on said jacket housing 07. The refrigerant heat flowing through the said condenser 01 is dissipated to the coolant means 02 in the said jacket housing 07. The heated coolant means 02 flows out from the said jacket housing 07 with the help of outlet 04 provided at the bottom of said jacket housing 07. The said heated coolant means 02 coming out from the said j acket housing 07 is

accumulated in the auxiliary tank 03. The said pump 05 draws power from the battery of vehicle. The rating the said battery may be either 12 volt or 24 volt.
The said submerged condenser assembly is mounted on vehicle, either in frontal area or on the back wall with suitable mounting arrangements.
The said condenser 01 is disposed inside the said jacket housing 07. The said condenser 01 is connected to heating ventilation air conditioning (HVAC) circuit. The AC compressor outlet which is high pressure discharge line is connected to condenser inlet 8a and condenser outlet 8b which is liquid line is connected to receiver dryer if available or directly to expansion valve inlet.
The said jacket housing is filled with liquid heat exchanging coolant means 02. The said liquid heat exchanging means 02 is always maintained in the said jacket housing 07 even if the AC system is not working. The said liquid heat exchanging means 02 is maintained in the said jacket housing 07 by means of a temperature sensitive valve which is normally closed. The said temperature sensor with valve arrangement 4a is provided in the outlet port 04 of the said jacket housing 07.
When the AC system is made ON, compressed refrigerant at high pressure and high temperature flows through the said condenser 01.
Said condenser 01 which is a heat exchanger dissipates the heat to the liquid heat exchanging means 02 surrounding the said condenser 01 inside the jacket housing 07. As the temperature liquid heat exchanging means 02 inside the said jacket housing 07 increases, said sensor 4a senses the rise in temperature and opens the valves to allow the heated liquid to flow out side the said jacket housing 07 in to the said auxiliary tank 03.
Inside the said auxiliary tank 03, the hot liquid coming out from said jacket housing 07 is converted in to small droplets by means of a swiveling mechanism 3a provided inside the auxiliary tank 03.

The liquid coming out of the said swiveling mechanism 3a is sprinkled over the fins which are placed inside the said auxiliary tank 03. The swiveling and sprinkling reduces the temperature of the liquid.
The said auxiliary tank 03 comprises an exhaust means 3b which is an exhaust fan in order to improve the temperature drop further. Said exhaust means 3b is mounted preferably on top of the said auxiliary tank 03 which takes out heat from the liquid.
The cooled liquid is taken out from the said auxiliary tank 03 and pumped in to the jacket housing 07 again with the help of an electrically operated pump 05.This close loop process continues till the AC is kept ON.
In accordance with another embodiment of the present invention a submerged condenser assembly comprises; a first tube member la, second tube member lb, auxiliary tank 03, pump 05 for pumping the coolant means 02, wherein said first tube member la and said second tube member lb are a tube - in - tube structure which are co-axial tubes, said first tube member la carrying the compressed refrigerant disposed inside the second tube member lb carrying the liquid heat exchanging means 02 which dissipates the heat from refrigerant flowing through said first tube member la.
Said auxiliary tank 03 is having a swiveling mechanism 3a to convert the hot liquid in to small droplets which is sprinkled over the fins provided inside the said auxiliary tank 03 for reducing the temperature of the liquid due to the swiveling and sprinkling of the liquid.
Said auxiliary tank 03 comprises an exhaust means 3b which is an exhaust fan mounted preferably on top of the said auxiliary tank 03 in order to further reduce the temperature of the liquid by taking out heat from the liquid.

Advantage:
The present invention eliminates the need of ram air flowing over condenser necessary for carrying the heat away from the condenser. The present invention provides flexibility in mounting the condenser thereby offering free hand for styling the vehicle.
The present condenser assembly eliminates the need of condenser fan which in turn reduces the electrical load requirement and therefore reducing the load on engine and also reduces the fuel consumption by the engine leading to less polluting and greener vehicle. Present invention does not require condenser fan hence noise and vibration arising due to fan is eliminated and the vehicle is quieter. The elimination of condenser fan also save cost and reduce the weight of the vehicles by reducing number of spare parts of the vehicle.
The foregoing description is a specific embodiment of the present invention. It should be appreciated that this embodiment is described for purpose of illustration only, and that numerous alterations and modifications may be practiced by those skilled in the art without departing from the spirit and scope of the invention. It is intended that all such modifications and alterations be included insofar as they come within the scope of the invention as claimed or the equivalents thereof.

We Claim:
1) Submerged condenser assembly comprises; a condenser 01. coolant means 02, auxiliary tank 03, pump 05 for pumping the coolant means 02, jacket housing 07 filled with said coolant means 02, wherein said condenser 01 is disposed inside said jacket housing 07 and submerged in said coolant means 02 for dissipating the heat from refrigerant flowing through said condenser.
2) The condenser assembly as claimed in claim 1, wherein said jacket housing 07 is having inlet port 06 and outlet port 04 connected to said pump 05 for pumping the said coolant means 02, said condenser 01 is having inlet 8a and outlet 8b for refrigerant to flow in and out of said condenser 01.
3) The condenser assembly as claimed in claim 1, wherein said inlet 8a and outlet 8b of said condenser are connected to heating ventilation air conditioning (HVAC) circuit of vehicle by means of connectors the AC compressor outlet which is high pressure discharge line is connected to condenser inlet 8a and condenser outlet 8b which is liquid line is connected to receiver dryer if available or directly to expansion valve inlet.
4) The condenser assembly as claimed in claim 1, wherein said outlet port 04 of the said jacket housing 07 comprises a temperature sensor with valve arrangement 4a which is normally closed to maintain liquid heat exchanging means 02 in the said jacket housing 07.
5) A submerged condenser assembly comprises; a first tube member la, second tube member lb, auxiliary tank 03, pump 05 for pumping the coolant means 02, wherein said first tube member 01 and said second tube member 02 are a tube - in - tube structure which are co-axial tubes, said first tube member la carrying the compressed refrigerant disposed inside the second tube member lb carrying the liquid heat exchanging means 02 which

dissipates the heat from refrigerant flowing through said first tube member 01.
6) The condenser assembly as claimed in claim 1 and 5, wherein said submerged condenser assembly is mounted on vehicle, either in frontal area or on the back wall of vehicle with suitable mounting arrangements.
7) The condenser assembly as claimed in claim 1 and 5, wherein said auxiliary tank 03 is having a swiveling mechanism 3a to convert the hot liquid in to small droplets which is sprinkled over the fins provided inside the said auxiliary tank 03 for reducing the temperature of the liquid due to the swiveling and sprinkling of the liquid.
8) The condenser assembly as claimed in claim 1 and 5, wherein said auxiliary tank 03 comprises an exhaust means 3b which is an exhaust fan mounted preferably on top of the said auxiliary tank 03 in order to further reduce the temperature of the liquid by taking out heat from the liquid.
9) A submerged condenser assembly as herein described with reference to accompanying drawings.