FORM -2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE
Specification
(See Section 10; rule 13)
COST EFFECTIVE HVAC CLIMATE BOXES
BEHR INDIA LIMITED
an Indian Company
of Gat.No.626/1/2 & 622/1/0
29 Milestone, Pune-Nasik Highway,
Village Kuruli, Tal. Khed, Pune - 410501,
Maharashtra, India
INVENTORS
1. GARIKIPATI, PARTHASARATH1
2. PATOLE, JOHN
3. KULKARNI, MITHUL KISHOR
THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED.

Field of the Disclosure:
The present disclosure generally relates to Heating, Ventilating, and Air Conditioning (HVAC) climate boxes.
Particularly, the present disclosure relates to low cost HVAC climate boxes.
Background:
HVAC (Heating, Ventilating, and Air Conditioning) refers to a technology of indoor or automotive environmental comfort. With increasing need for conditioning of the environment, there has been considerable demand for HVAC climate boxes or HVAC units. There has been a lot of development in improving the efficiency of HVAC units by improving their design and construction.
Nowadays many small passenger cars are coming up in the market. Some of the lower end versions of cars are not provided with air conditioning systems. The main reason for this is to keep the cost and ultimately the price of the cars low. However, this could reduce drivers and passengers comfort, mainly in very high or very low ambient temperature. The main challenge faced with HVAC units is to reduce the cost but not reducing the necessary features required for comfort.
Generally, a HVAC climate box includes a blower, an evaporator, a heater and a distribution flap layout. These components can not be eliminated but can be modified to achieve a basic performance required by the passengers.
In conventional HVAC climate boxes the following modes for air distribution can be selected:

• Face mode - In this mode the air is directed towards drivers and passengers face.
• Face and Foot mode - In this mode the air is simultaneously directed towards drivers and passengers face and feet.
• Foot mode - In this mode the air is directed towards drivers and passengers feet.
• Foot and defrost mode - In this mode the air is simultaneously directed towards drivers and passengers feet and windscreen of the vehicle.
• Defrost mode - In this mode the air is directed towards the windscreen of the vehicle.
The direction of flow of air in the abovementioned modes is independently governed. This is achieved by closing and opening of different flaps. The opening and closing of these flaps is controlled by individual control knobs on a control panel. In a conventional HVAC unit, different temperature settings like maximum cold or maximum hot or any other temperature between maximum cold and maximum hot can be selected based on the ambient temperature. The required temperature selection is achieved by controlling the closing and opening of temperature mixing flaps. The opening and closing of these flaps is controlled by individual control knobs on a control panel. In a conventional HVAC unit, a separate foot outlet is provided in a distribution housing to direct the air towards driver's and co driver's feet.
Although, the conventional HVAC climate boxes are useful for indoor or automotive environmental comfort, the conventional HVAC climate boxes have various limitations. For example, the conventional HVAC climate boxes are costly. Further, the conventional HVAC climate boxes are constructed for a particular vehicle and accordingly the conventional climate boxes can not be used for other vehicle type.

Accordingly, there is need of a HVAC climate box that has low cost. Further, there is need of a HVAC climate box that can be accommodated in existing available space of a vehicle. Furthermore, there is need of a HVAC climate box that can be fitted with the existing fixing arrangement available in the vehicle. Additionally, there is need of a HVAC climate box that can be fitted with the existing vehicle interfaces for air distribution
Objects:
Some of the objects of the present disclosure which at-least one embodiment is able to satisfy, are described herein below:
It is an object of the present disclosure to ameliorate one or more problems of the prior art or to at least provide a useful alternative.
An object of the present invention is to provide a cost effective HVAC climate box that provides reduced cost in the range of 15-20% as compared to the prior art HVAC climate boxes.
Another object of the present invention is to provide a cost effective HVAC climate box that can be accommodated in existing available space of a vehicle.
Yet another object of the present invention is to provide a cost effective FFVAC climate box that can be fitted with the existing fixing arrangement available in a vehicle.

Further, an object of the present invention is to provide a cost effective HVAC climate box that can be fitted with the existing vehicle interfaces for air distribution.
These and other objects of the present invention are dealt in a great extent by the accompanying drawings and the descriptive matter, in which there are illustrated exemplary embodiments of the invention.
SUMMARY
A Heating, Ventilation and Air Conditioning (HVAC) system for directing conditioned fluid towards predetermined locations is disclosed in accordance with an embodiment of the present disclosure. A Heating, Ventilation and Air Conditioning (HVAC) system includes housing, a blower, a drum flap arrangement, an evaporator, a heater, a control panel, a first outlet, and a second outlet. The blower is disposed inside the housing and energizes the fluid entering the housing. The drum flap arrangement receives fluid from the blower. The drum flap arrangement further gets displaced between a first configuration for defining a first flow path for the passage of the fluid there-through and a second configuration for defining a second flow path for the passage of the fluid there-through. The evaporator is disposed between the blower and the drum flap arrangement and conditions the fluid leaving the blower, wherein the evaporator is disposed along the first flow path and/or the second flow path. The heater is disposed between the blower and the drum flap arrangement and further conditions the fluid leaving the blower and the evaporator, wherein the heater is disposed along the second flow path and is bypassed by the fluid flowing through the first flow path. The control panel includes a control lever, a blower knob, and an ON/OFF lever. The control lever controls distribution and temperature of the conditioned fluid by actuating the drum flap arrangement.

The blower knob actuates the blower. The first outlet receives conditioned fluid flowing through the first flow path and directs conditioned fluid towards a first predetermined location. The second outlet receives conditioned fluid flowing through the second flow path and directs conditioned fluid towards a second predetermined location.
Typically, the blower is a centrifugal blower.
Generally, the heater is adapted to utilize heat from engine coolant.
Preferably, the first outlet directs fluid towards face of a vehicle occupant.
Similarly, the second outlet directs fluid towards windscreen of a vehicle.
Brief Description of the Accompanying Drawings:
The invention will now be explained in relation to the accompanying drawings, in which:
FIGURE 1 illustrates a perspective view of a cost effective HVAC climate box, in accordance with one embodiment of the present invention;
FIGURE 2 illustrates a sectional view of the cost effective HVAC climate box of Figure 1 depicting a face full cold mode;
FIGURE 3 illustrates another sectional view of the cost effective HVAC climate box of Figure 1 depicting a defrost full hot mode;

FIGURE 4 illustrates a perspective view of a common flap of an air distribution and temperature control arrangement of the cost effective HVAC climate box of Figure 1; and
FIGURE 5 illustrates a perspective view of a control panel of the cost effective HVAC climate box of Figure 1.
Detailed Description of the Accompanying Drawings:
The invention will now be described with reference to the accompanying drawings which do not limit the scope and ambit of the invention. The description provided is purely by way of example and illustration.
The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
The present invention provides a cost effective HVAC climate box that provides reduced cost in the range of 15-20% as compared to the prior art HVAC climate boxes. The cost effective HVAC climate box of the present invention can be effectively used in small passenger/commercial vehicles of the lower end versions thereby keeping the price of the small passenger/commercial vehicles at low level by providing comforts of the high end cars. Further, the cost effective HVAC climate box of the present invention can be accommodated in

the existing available space of a vehicle and thereby prevent any adjustments in the available space of the vehicle. Also, the cost effective HVAC climate box of the present invention can be fitted with the existing fixing arrangement available in the vehicle. Moreover, the cost effective HVAC climate box of the present invention can be fitted with the existing vehicle interfaces for air distribution.
Referring to Figures 1 to 5, a cost effective HVAC climate box 100 (hereinafter referred to as "HVAC climate box 100") is described in accordance with one embodiment of the present invention. The HVAC climate box 100 includes a defrost outlet 102, a face outlet 104, a common drum flap 106, a heater core 108 (illustrated in Figures 2 and 3), an evaporator 110 (illustrated in Figures 2 and 3), a blower 112 (illustrated in Figures 2 and 3) and a control panel 114 (illustrated in Figure 5). As shown in Figure 5, the control panel 114 includes an air distribution and temperature control lever 116, a blower knob 118, an on/off lever 120 and a plurality of temperature symbols 122.
In accordance with the present invention, the HVAC climate box 100 includes the face outlet 104 and the defrost outlet 102. The foot outlet is not provided in the distribution housing, since in Indian climatic condition the Foot mode for air distribution is rarely used.
In accordance with the present invention, the air distribution control and the temperature control are governed by a common single flap i.e. by the common drum flap 106 and a common controlling lever i.e. by the air distribution and temperature control lever 116. This arrangement facilitates the integrated selection of air distribution and temperature control. In case of the Face mode only cold air is distributed. More specifically, in case of the Face Mode the cold air that is directed towards drivers and passengers face flows down towards lower body parts of drivers and passengers and thereby providing comfort to the

entire body parts of drivers and passengers. This happens due to the tendency of the cold air to move down and the tendency of the warm air to move up. Similarly, in case of the Defrost mode only hot air is distributed which is required for demisting the windscreen.
Further, as shown in Figure 5, as the air distribution and temperature control lever 116 is moved from the operative top position to the operative bottom position along the plurality of temperature symbols 122, the coldness of the distributing air increases.
Thus in accordance with the present invention, the highly compact HVAC climate box 100 is envisaged that can be conveniently used for all kinds of low cost vehicles and is not limited by the type of fuel used in a vehicle.
Although the FfVAC climate box 100 is described herein above in relation to vehicles, the HVAC climate box of the present invention can be effectively used for both indoor and automotive applications.
Technical Advancements and Economic Significance
The cost effective FfVAC climate box in accordance with the present invention described herein above has several technical advantages including but not limited to the realization of:
• a cost effective HVAC climate box that provides reduced cost in the range of 15-20% as compared to the prior art HVAC climate boxes ;
• a cost effective HVAC climate box that serves the basic comfort purpose of cold air in Face mode and hot air in Defrost mode;

• a cost effective HVAC climate box that can be used without any restriction on the type of fuel;
• a cost effective HVAC climate box that can be used for any type of low cost vehicles;
• a cost effective HVAC climate box that reduces inventory of parts; and
• a cost effective HVAC climate box that reduces time of development.
The numerical values given of various physical parameters, dimensions and quantities are only approximate values and it is envisaged that the values higher or lower than the numerical value assigned to the physical parameters, dimensions and quantities fall within the scope of the disclosure and the claims unless there is a statement in the specification to the contrary.
Throughout this specification the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.
The use of the expression "at least" or "at least one" suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the disclosure to achieve one or more of the desired objects or results.
Any discussion of documents, acts, materials, devices, articles or the like that has been included in this specification is solely for the purpose of providing a context

for the disclosure. It is not to be taken as an admission that any or all of these matters form a part of the prior art base or were common general knowledge in the field relevant to the disclosure as it existed anywhere before the priority date of this application.
The numerical values mentioned for the various physical parameters, dimensions or quantities are only approximations and it is envisaged that the values higher/lower than the numerical values assigned to the parameters, dimensions or quantities fall within the scope of the disclosure, unless there is a statement in the specification specific to the contrary.
The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.

We Claim:
1. A Heating, Ventilation and Air Conditioning (HVAC) system for directing conditioned fluid towards predetermined locations, said system comprising:
• a housing;
• a blower disposed inside said housing and adapted to energize fluid entering said housing;
• a drum flap arrangement adapted to receive fluid from said blower, said drum flap arrangement further adapted to be displaced between a first configuration for defining a first flow path for the passage of the fluid there-through and a second configuration for defining a second flow path for the passage of the fluid therethrough;
• an evaporator disposed between said blower and said drum flap arrangement and adapted to condition the fluid leaving said blower, wherein said evaporator is disposed along said first flow path and/or said second flow path;
• a heater disposed between said blower and said drum flap arrangement and adapted to further condition the fluid leaving said blower and evaporator, wherein said heater is disposed along said second flow path and is bypassed by fluid flowing through said first flow path; and
• a control panel comprising:
oa control lever for controlling distribution and temperature of the conditioned fluid by actuating said drum flap arrangement;
oa blower knob for actuating said blower; and
oan ON/OFF lever;

• a first outlet adapted to receive conditioned fluid flowing through
said first flow path and direct conditioned fluid towards a first
predetermined location; and • a second outlet adapted to receive conditioned fluid flowing
through said second flow path and direct conditioned fluid towards
a second predetermined location.
2. The Heating, Ventilation and Air Conditioning (HVAC) system as claimed in Claim 1, wherein said blower is a centrifugal blower.
3. The Heating, Ventilation and Air Conditioning (HVAC) system as claimed in Claim 1, wherein said heater is adapted to utilize heat from engine coolant.
4. The Heating, Ventilation and Air Conditioning (HVAC) system as claimed in Claim 1, wherein said first outlet directs fluid towards face of a vehicle occupant.
5. The Heating, Ventilation and Air Conditioning (HVAC) system as claimed in Claim 1, wherein said second outlet directs fluid towards windscreen of a vehicle.
6. A vehicle comprising a Heating, Ventilation and Air Conditioning (HVAC) system as claimed in claims 1 to 5 and as substantially described hereinabove with reference to the accompanying drawings.