THE PATENT ACT 1970
&
The Patents Rules, 2003 PROVISIONAL / COMPLETE SPECIFICATION (See section 10 and rule 13)
1. TITLE OF THE INVENTION:
"Air flow partition for cabin heater core"
2. APPLICANT
(a) NAME: TATA TOYO Radiator Ltd
(b) NATIONALITY: Indian Company registered under the provisions of The Companies Act, 1956
(c) ADDRESS: Survey No. 235/245, Village Hinjewadi, Taluka Mulshi, Dist. Pune 411 027, M.S. India
3. PRREAMBLE TO THE DESCRIPTION
PROVISIONAL COMPLETE
The following specification describes the The following specification
invention. particularly describes the invention and the manner in which it is to be performed.




FORM 2

Filed of the Invention
The present invention relates to the Heating, Ventilation and Air Conditioning (HVAC hereinafter) system of an automotive capable of heating of vehicle cabin, more particularly it relates to the heater core used for controlling heat supplied to a cabin of an automobile.
Background
In earlier HVAC system was used for car, there is found that there were no provision to control the heating air (mixture of 85% re-circulated & 15% fresh ambient air which absorbs the heat from heater core surface) which flow inside cabin as need of required amount in absence of heater cores separation. In this system is not so optimally was utilised where need of lower heating rate because of the entire heater core is exposed to heating air.
Prior Art
Korean Patent KR 20020007826 (A) describes a heat exchanger and an heater core surface partition was created by assembling the metallic plate (14) as a part of width of core (11) in heater core assembly to form left core (11a) and right core (11b) as shows (fig.2). Metallic plate (14) was brazed with heater core. There was some limitation for creating multidirectional core surface partition. Hence prior this art, heating air flow could not been control along both directions (along tube & across tube) which led to improper heating air flow distribution across cabin (25).
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Deficiencies of prior art:
a) Lower cabin heating efficiency due to lack of multidirectional heating air flow control.
b) Non standard (not an assembly of alternative arrangement of fin and tube only) heater core assembly generation by assembling metallic plate (14) as a part of core (11) of heater core.
c) Partition creation was possible along tubes (6) only, not across tubes (6) although necessity therefore improper control for desired heating intensity.
Objects of the present invention:
The object of the present invention is to provide a heating air flow controlled heater core assembly capable of fulfilling various heating requirement of customer.
Further object of the present invention is to provide an air flow controlled across both direction (across & along to tubes).
Further one object of the present invention is to provide an air flow controlled heater core assembly capable of availing more options of heating level to desired intensity instead of using maximum heating intensity.
Yet another object of the present invention is to provide an air flow controlled heater core assembly capable of optimising the heater core geometry by improving heating efficiency at rated performance capacity.
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Summary of the Invention:
The present invention provides a heating air flow controlled heater core assembly for controlling the exposed surface area of the heater core to the heating air. The air flow controlled heater core assembly includes a partition band assembly (assembly consists of partition band & form) to secure the sliding mechanism which consists with flap members. The partition band assembly is secured across the heater core. The partition band is capable of providing a rigid structure thereon. The sliding mechanism is capable of covering and uncovering the heater core exposed area to heating air through flap members upon operating a knob provided in the cabin of an automobile. Upon operating the knob by a driver seating in the cabin of an automobile to regulate the heating of the cabin, accordingly the flap member is slid by the sliding mechanism to cover or uncover a portion of the heater core. As a result, exposed area to heating air can be regulated thereby regulating the cabin temperature.
Statement of the Present Invention:
According to the present invention there is provided a heating air flow controlled heater core assembly for controlling the exposed surface area of the heater core, the air flow controlled heater core assembly comprises;
a partition band assembly secured across the heater core, the partition band capable of providing a rigid structure;
a sliding mechanism secured to the partition band consist with the flap member, the flap member capable of covering and uncovering the heater core to regulate exposed area by means of sliding mechanism upon operating a knob provided in the cabin of an automobile.
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Typically, wherein the partition assembly consists of a partition band and a foam member disposed on the partition band assembly, thereby securing the heater core.
According to the present invention relates to multidirectional partitions of core surface of heater core can be feasible. By multidirectional partition of core surface, heating air flow inside vehicle cabin can be controlled properly means heating intensity can be controlled properly which leads to improve the heating efficiency of HVAC system.
Heater core is used in HVAC system of automotive vehicles for heating of vehicle cabin air during cold climate. Heating of cabin air is being feasible through heating air by means of heater core. Before flowing inside cabin for warming, heating air passes through core surfaces of heater core so there convection heat transfer takes place from series of fins & tubes and as a result it is being hot. Heater core heat transfer exposal areas were already partitioned into nos. of smaller area by used of partition band assembly (assembly of partition band & foam). On this partition band assembly, sliding mechanism was restricted to control the flow rate of heating air inside cabin.
Brief Description of Figures:
Fig. 1 shows heater core assembly according to the present invention;
Fig. 2 shows heater core assembly according to the prior art;
Fig. 3 shows the functional block diagram of heating cycle of HVAC system;
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Fig. 4 shows schematic representation of air flow partition system according to the present invention; and
Fig. 5 shows multidirectional core partitions created using partition band assembly.
Description of present invention:-
The foregoing objects of the invention are accomplished and the problems and shortcomings associated with prior art techniques and approaches are overcome by the present invention as described below in the preferred embodiment.
This invention is illustrated in the accompanying drawings, through out which like reference letters indicate corresponding parts in the various figures.
Referring now to figure 1, shows a heating air flow controlled heater core assembly (100) according to the present invention. The heating air flow controlled heater core assembly (100) for controlling the exposed surface area of the heater core to heating air. The heating air flow controlled for HVAC system includes a heater core assembly (100) with partition band assembly (12) and a separate sliding mechanism (not shown) consists with a flap member (not shown). The partition band assembly (100) is secured across the heater core assembly (100). The partition band assembly (12) is capable of providing a rigid structure for supporting sliding mechanism. The sliding mechanism is capable of covering and uncovering the heater core air exposed area upon operating a knob (not shown) provided in the cabin of an automobile. The flap member is removably secured on the partition band
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assembly (12) along with sliding mechanism and according this it is capable of covering a portion of the heater core exposed area.
Further, upon operating the knob by a driver seating in the cabin of an automobile to regulate the heating rate of the cabin, accordingly the flap member is slided by the sliding mechanism to cover or uncover the heater core exposed area to air.
The partition band assembly (12) consists of a partition band (12a) and a foam member (13) disposed on the partition band, thereby securing the heater core.
Referring to figure 3, 4 and 5 the heater core assembly (100) is a fin (5) & tube (6) type heat exchanger. The heater core assembly (100) is essential device for HVAC system of an automobile as a part of air heating cycle of (HVAC) system which is running during cold climate for automobile cabin (25) heating. Figure 3 shows the functional block diagram of heating cycle of HVAC system. The hot coolant (27) is regularly circulating between heater core (refer figure 1) and water jacket of (29) internal combustion engine (IC Engine) by means of pump (22). Inside heater core assembly (100), hot coolant (27) is passing through series of tube (6).
The heater core assembly (100) further comprises a core (11) having tubes (6) and fin (5), wherein outside heater core, heating air (24) passes in cross flow direction through the core (11). Due to cross flow arrangement of coolant (27) and heating air (24), heating air (24) absorbs the heat from hot coolant (27) by modes of conduction & convection heat transfer. By absorbing the heat, heating air (24) gets hot and later on flows inside the cabin (25) (refer fig. 3) for heating the cabin therein.
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To control the heating air flow, It is necessary to regulate core surface exposed area to pass the heating air (24). Regulation of core surface exposed area can be feasible only by creating partition of core (11) therefore earlier core surface (11) partition was created by brazing the metallic plate (14) as a part of core assembly. But it was feasible to create partition along tube only. According to this theses invention, multidirectional partition creation of core (11) can be feasible by incorporating partition band assembly (12) as per requirement mean this invention overcomes the earlier invention of core partitioning along tube direction only.
According to the present invention "Air flow partition for cabin heater core" multidirectional core partitions were created using partition band (12a) as shown in fig.5. In an embodiment, the partition band assembly (12) is fitted by snap fit insertion of partition band (12a) through jaws (15) into partially pierced hole on brazed core (11). At heating air side, vehicle manufacturers provide a mechanism which is rested on partition band assembly (12). This mechanism is responsible to open or close (block) the parted core surface exposed area to allow the heating air flow across it. As a result heating air flow rate inside cabin (25) can be controlled which leads to control the heating intensity & heating efficiency of HVAC system.
Further, the partition band assembly (12) consists of partition band (12a) and foam (13) which is gluing over it as shown in fig.5.
The foregoing objects of the invention are accomplished to overcome the problems and shortcomings associated with prior art techniques.
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Detailed descriptions of the preferred embodiment are provided herein; however, it is to be understood that the present invention may be embodied in various forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but rather as a basis for the claims and as a representative basis for teaching one skilled in the art to employ the present invention in virtually any appropriately detailed system, structure or matter.
The embodiments of the invention as described above and the methods disclosed herein will suggest further modification and alterations to those skilled in the art. Such further modifications and alterations may be made without de-partitioning from the spirit and scope of the invention.
Advantages of Invention:
a) Heating intensity can be controlled properly because of multidirectional core surface partitioning.
b) By this invention, standard core of heater core assembly can create which offers manufacturing cost benefit.
c) Improvement in heating efficiency therefore heater core size can be optimized which offers product cost benefit.
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Dated this 29th August 2009
I/We Claim:
1. A heating air flow controlled heater core assembly for controlling the exposed surface area of the heater core to the heating air, the heating air flow controlled heater core assembly comprises;
a partition band assembly secured across the heater core, the partition band assembly capable of providing a rigid structure;
a flap member removably secured on the partition band assembly, the flap member capable of covering a portion of the heater core; and
a sliding mechanism secured to the partition band assembly and with the flap member, the sliding mechanism capable of covering and uncovering the heater core upon operating a knob provided in the compartment of an automobile.
wherein, upon operating the knob by a driver seating in the cabin of an automobile to regulate the heating intensity of the cabin, accordingly the flap member is slided by the sliding mechanism to cover or uncover the heater core exposed area to air, thereby regulating the cabin temperature.
2. A heating air flow controlled heater core assembly of claim 1, wherein the partition band assembly consists of a partition band and a foam member disposed on the partition band, thereby securing the heater core.

M.D. Bhate (Agent for applicant)
10
9 SEP 2009