FIELD
The present disclosure relates to a vehicle configured with a heating ventilation and air conditioning system, particularly, a vehicle configured with a heating ventilation and air conditioning system that includes at least one auxiliary air conditioning unit in addition to a main air conditioning unit.
BACKGROUND
Earlier, only selected high end variants of vehicles were configured with a heating ventilation and air conditioning system as the heating ventilation and air conditioning system was considered as an optional or
.luxury_featur.e.-However,..now-almost-alLpassenger vehicles arexonfigured
with the heating ventilation and air conditioning system as the heating ventilation and air conditioning system has now become a standard feature that is available in almost all the passenger vehicles. Specifically, with global warming and demand for larger vehicles, such as for example, vehicles with larger cabin space and seating capacity for accommodating more occupants, air conditioning inside the vehicle cabin have become essential. Further, earlier only a single air conditioning unit was used to cater to air conditioning needs of the passengers inside the vehicle cabin. However, such single air conditioning unit failed to provide effective air conditioning to all passengers, particularly, the rear seat occupants of the vehicle. Few vehicles are configured with air vents that are connected to the single air conditioning unit and supplies conditioned air to the rear seat passengers. However, such arrangement provides conditioned air to the rear seat passengers, only when the single air conditioning unit of the vehicle is operating. With vehicle manufacturer targeting fleet owners and owners of high end vehicles that are generally chauffer or driver driven, in

which comfort of rear passengers is of prime importance, such arrangement provide conditioned air to the rear seat occupants only when the single air conditioning unit of the vehicle is operating and fails to meet the requirement of providing conditioned air to the rear seat occupants irrespective of operational condition of the single air conditioning unit.
Also, with increase in vehicle size resulting in increase in number of occupants that can be accommodated inside the vehicle, there is a need for a vehicle that is configured with an improved vehicle heating ventilation and air conditioning system that includes an auxiliary air conditioning unit in addition to the main air conditioning unit. However, such auxiliary air conditioning unit is either at least fully dependent on the main air conditioning unit for operation thereof or fails to provide all features and functions of the main air conditioning unit. Further, such auxiliary air conditioning units fail to cater to or meet the personalized comfort requirements as per rear seat passengers' individual choices. Further, the auxiliary air conditioning unit that is part of the vehicle air conditioning system is bulky and faces issues in relation packaging thereof inside the limited space of the vehicle cabin. Further, as the auxiliary air conditioning unit is generally packaged inside the vehicle cabin, the auxiliary air conditioning unit occupies space inside the vehicle cabin that can cause hindrance to free movement of the passenger or hinder packaging of other sub-systems inside the vehicle cabin, thereby detrimentally impacting ergonomics inside the vehicle cabin.
Considering the above drawbacks associated with the prior art, there is a need for a vehicle configured with a heating ventilation and air conditioning system that includes an auxiliary air conditioning unit in addition to the main air conditioning unit, wherein the auxiliary air

conditioning unit operates independent of the main air conditioning unit and provides all features and functions of the main air conditioning unit. Specifically, there is a need for a vehicle configured with a heating ventilation and air conditioning system that includes an auxiliary air conditioning unit that in turn is capable of providing conditioned air and air conditioning controls to the rear seat occupants irrespective of operational condition of the main air conditioning unit. Further, there is a need for a vehicle configured with a heating ventilation and air conditioning system that includes an auxiliary air conditioning unit that is compact in configuration and that can be conveniently packaged in an otherwise unused space inside the vehicle cabin. Furthermore, there is a need for a vehicle configured with a heating ventilation and air conditioning system that includes an auxiliary air conditioning unit to support the main air conditioning unit in maintaining comfort conditions inside the vehicle cabin whenever required. Furthermore, there is a need for a vehicle configured with a heating ventilation and air conditioning system that includes an auxiliary air conditioning unit that in turn can be strategically placed inside the vehicle cabin to provide conditioned air to all occupants, particularly, the rear seat occupants while still optionally being able to be connected with condenser of a main air conditioning unit for facilitating operation of the auxiliary air conditioning unit.
OBJECTS
An object of the present invention is to provide a vehicle configured with an air conditioning system that includes an auxiliary air-conditioning unit in additional to a main air conditioning unit, wherein the auxiliary air conditioning unit is independent of the main air conditioning unit but is configured with all features of the main air conditioning unit.

Another object of the present invention is to provide a vehicle configured with an air conditioning system that includes an auxiliary air-conditioning unit in addition to a main air conditioning unit, wherein the auxiliary air conditioning unit is capable of functioning even when the vehicle or the main air conditioning unit is switched off.
Another object of the present invention is to provide a vehicle configured with an air conditioning system that includes an auxiliary air-conditioning unit to provide conditioned air to the rear occupants irrespective of operational condition of a main air conditioning unit.
Yet another object of the present invention is to provide a vehicle configured with an air conditioning system that includes a compact auxiliary air conditioning unit that can be conveniently packaged in an otherwise un-used and limited space inside the vehicle cabin.
Still another object of the present invention is to provide a vehicle configured with an air conditioning system that includes an auxiliary air conditioning unit to support a main air conditioning unit in maintaining comfort conditions inside the vehicle cabin whenever required based on requirements of rear seat passengers of a vehicle.
Yet another object of the' present invention is to provide a vehicle configured with an air conditioning system that includes an auxiliary air conditioning unit to effectively distribute air inside the vehicle cabin, particularly, towards the rear seat passengers of the vehicle.

In the present description, some elements or parameters may be indexed, such as a first element and a second element. In this case, unless stated otherwise, this indexation is only meant to differentiate and name elements which are similar but not identical. No idea of priority should be inferred from such indexation, as these terms may be switched without betraying the invention. Additionally, this indexation does not imply any order in mounting or use of the elements of the invention.
SUMMARY OF THE INVENTION
A vehicle includes a Heating Ventilation and Air-Conditioning system, a main drive and an auxiliary drive other than the main drive. The Heating Ventilation and Air-Conditioning system includes a main air conditioning unit and at least one auxiliary air conditioning unit, wherein "the main_drive_provides_operative-power-to-at-least-one-of-the-vehiele-via-a transmission and the main air conditioning unit, whereas the auxiliary drive provides operating power to the at least one auxiliary air conditioning unit . The at least one auxiliary air conditioning unit is packaged underneath at least one of a driver seat and a co-driver seat of the vehicle.
Generally, the main air conditioning unit includes an evaporator, a compressor, a condenser and an expansion device, wherein the compressor is driven by the main drive that is at least one of an engine and a motor depending on whether the vehicle is an electric vehicle, an engine powered vehicle and a hybrid vehicle.
Alternatively, the at least one auxiliary air conditioning unit includes, an evaporator, a compressor, a condenser and an expansion device, wherein the compressor is driven by the auxiliary drive.

In accordance with an embodiment of the present invention, the at least one auxiliary air conditioning unit includes an evaporator, a compressor and an expansion device, wherein the compressor is driven by the auxiliary drive, the at least one auxiliary air conditioning unit is further functionally coupled to the condenser of the main air conditioning unit so as to facilitate operation of the at least one auxiliary air conditioning unit without requiring operation of the main air conditioning unit.
Particularly, the at least one auxiliary air conditioning unit is compact in configuration due to lateral offset arrangement of the evaporator with respect to a fan system and selection of suction type fan system that is disposed downstream of the evaporator. Accordingly, the auxiliary air conditioning unit is disposed in otherwise unused and limited space within a cabin of the vehicle.
Specifically, the auxiliary drive is at least one of a small engine and a motor that is different from the at least one engine and motor driving the vehicle.
Generally, at least one of the main air conditioning unit and the at least one auxiliary air conditioning unit is configured with individual controls for independently controlling operation thereof.
Specifically, the vehicle further includes at least one sensor, at least one of the main air conditioning unit and the at least one auxiliary air conditioning unit operates in either one of manual mode and automatic mode, wherein in the manual mode at least one of the main air

conditioning unit and the at least one auxiliary air conditioning unit operates based on selections made by user for controlling air conditioning parameters inside the cabin of the vehicle, whereas in the automatic mode at least one of the main air conditioning unit and the at least one auxiliary air conditioning unit automatically operates in response to selections made by a control unit based on air conditioning parameters detected inside the cabin of the vehicle by the at least one sensor.
Generally, the compressor is a rotary compressor that is compact in configuration.
Also is disclosed a Heating Ventilation and Air-Conditioning system for a vehicle in accordance with an embodiment of the present invention. The Heating Ventilation and Air-Conditioning system includes a main air conditioning unit and at least one auxiliary air conditioning unit, wherein at least one of the main air conditioning unit and the vehicle derives operating power from a main drive, whereas the at least one auxiliary air conditioning unit derives operating power from an auxiliary drive configured in the vehicle that is other than the main drive, the at least one auxiliary air conditioning unit is packaged underneath at least one of a driver seat and a co-driver seat of the vehicle.
FIGURE 1 illustrates a block diagram depicting a vehicle configured with a Heating Ventilation and Air-Conditioning system that includes a main air conditioning unit and an auxiliary air conditioning unit in accordance with an embodiment of the present invention, also are depicted the various elements of the main air conditioning unit and the auxiliary air conditioning unit;

FIGURE 2 illustrates a block diagram depicting a vehicle configured with a Heating Ventilation and Air-Conditioning system that includes a main air conditioning unit and an auxiliary air conditioning unit in accordance with another embodiment of the present invention;
FIGURE 3a illustrates a schematic representation of a vehicle configured with the vehicle heating ventilation and air conditioning system of FIGURE 1 or FIGURE 2, wherein the auxiliary air conditioning unit is depicted disposed under a co-driver seat of the vehicle; and
FIGURE 3b illustrates a schematic representation of the vehicle of FIGURE 3a, wherein the auxiliary air conditioning unit is depicted disposed under a driver seat of the vehicle.
It must be noted that the figures disclose the invention in a detailed enough way to be implemented, said figures helping to better define the invention if needs be. The invention should however not be limited to the embodiment disclosed in the description.
DETAILED DESCRIPTION
The present invention envisages a vehicle that includes a main drive, an auxiliary drive and a Heating Ventilation and Air-Conditioning system that is configured with at least one compact, auxiliary air conditioning unit in addition to a main air conditioning unit, particularly, the at least one auxiliary air conditioning unit is independent of the main air conditioning unit and derives operating power for operation thereof from

the auxiliary drive that is other than/ not same as the main drive used for driving at least one of the vehicle via a transmission and the main air conditioning unit. Accordingly, the at least one auxiliary air conditioning unit provides conditioned air to the rear occupants irrespective of operational condition of the main air conditioning unit. Also, the at least one auxiliary air - conditioning unit provides all features of the main air conditioning unit. The Heating Ventilation and Air Conditioning system is also applicable in any other systems and applications, where there is requirement for at least one auxiliary air conditioning unit along with the main air conditioning unit, the at least one auxiliary air conditioning unit and the main air conditioning unit are required to operate independent of each other and the auxiliary air conditioning unit is required to be packaged in a limited space.
Referring to FIGURE 1 and FIGURE 2 ot the accompanying drawings, a vehicle 200 configured with Heating Ventilation and Air-Conditioning systems 100a and 100b in accordance with different embodiments of the present invention respectively is illustrated. Particularly, FIGURE 1 illustrates the vehicle 200 configured with the system 100a that includes a main air conditioning unit 10 and at least one auxiliary air conditioning unit 110, whereas the FIGURE 2 illustrates the vehicle 200 configured with the system 100b that includes the main air conditioning unit 10 and at least one auxiliary air conditioning unit 210. The vehicle 200 includes either one of the Heating Ventilation and Air-Conditioning system 100a and 100b, a main drive 20 and an auxiliary drive 120 other than the main drive 20.
Referring to the FIGURE 1 and the FIGURE 2 of the accompanying drawings, the main drive 20 provides operating power to at least one of

the vehicle 200 via a transmission 30 and the main air conditioning unit 10, whereas the auxiliary drive 120 provides operating power to the at least one auxiliary air conditioning unit 110, 210. With such configuration, the at least one auxiliary air conditioning unit 110, 210 is independent of the main air conditioning unit 10 but is configured with all features of the main air conditioning unit 10, such as for example, the at least one auxiliary air conditioning unit 110, 210 can also operate in re-circulation mode or fresh air mode similar to the main air conditioning unit 10. Accordingly, the at least one auxiliary air conditioning unit 110, 210 provides conditioned air to the rear occupants of the vehicle 200 irrespective of operational condition of the main air conditioning unit 10. Specifically, with such configuration, the at least one auxiliary air conditioning unit 110, 210 is capable of operating and providing conditioned air to the rear occupants of the vehicle 200 even when the vehicle 200 or the main air conditioning unit 10 is switched off. Further, with such configuration, the at least one auxiliary air conditioning unit 110, 210 supports the main air conditioning unit 10 in maintaining comfort conditions inside the vehicle cabin whenever required based on requirements of rear seat passengers of the vehicle 200. Also, with such configuration the at least one auxiliary air conditioning unit 110, 210 effectively distributes air inside the vehicle cabin, particularly, towards the rear seat passengers of the vehicle 200 that are generally deprived of the conditioned air in case of the vehicle is configured with the conventional air conditioning systems.
Again referring the FIGURE 1 and the FIGURE 2 of the
accompanying drawings, the main air conditioning unit 10 includes an evaporator 12, a compressor 14, a condenser 16 and an expansion device 18, wherein the compressor 14 is driven by the main drive 20 that is at least one of an engine and a motor depending on whether the vehicle 200 is an electric vehicle, an engine powered vehicle and a hybrid vehicle.

Further, the compressor 14 is a rotary compressor that is compact in configuration. Generally, the condenser 16 is disposed along the walls defining the outline of the vehicle 200 or the walls separating the vehicle 200 from the outside, such that at least part of the condenser 16 is in contact with outside air so as to facilitate heat rejection Qmc by the condenser 16 to the outside the vehicle cabin. Further, at least a part of the evaporator 12 is in contact with inside cabin air so as to facilitate heat extraction Qme from the inside cabin air.
Specifically referring to FIGURE 1 of the accompanying drawings, the auxiliary air conditioning unit 110 includes an evaporator 112, a compressor 114, a condenser 116 and an expansion device 118, wherein the compressor 114 is driven by the auxiliary drive 120. The compressor 114 is a rotary compressor that is compact in configuration. The auxiliary drive 120 can be at least one of a small engine and a motor that is different from the at least one engine and motor driving at least one of the vehicle 200 via the transmission 30 and the main air conditioning unit 10. Generally, the condenser 116 is disposed along the walls defining the outline of the vehicle 200 or walls separating the vehicle 200 from the outside, such that at least part of the condenser 116 is in contact with outside air so as to facilitate heat rejection Qac by the condenser 116 to the outside the vehicle cabin. Further, referring to FIGURE 2 of the accompanying drawings, the at least one auxiliary air conditioning unit 210 includes an evaporator 212, a compressor 214 and an expansion device 218, wherein the compressor 214 is driven by the auxiliary drive 120 that is other than the main drive 20. The compressor 214 is a rotary compressor that is compact in configuration. The at least one auxiliary air conditioning unit 210 is further functionally so coupled to the condenser 16 of the main air conditioning unit 10 that the condenser 16 facilitates operation of the at least one auxiliary air conditioning unit 210 without

even requiring operation of the main air conditioning unit 10. Specifically, the at least one auxiliary air conditioning unit 210 is functionally coupled to the condenser 16 such that the condenser 16 facilitates heat rejection Qac to outside the vehicle cabin. With such configuration, the at least one auxiliary air-conditioning unit 110, 210 is capable of functioning even when the vehicle 200 or the main air conditioning unit 10 is switched off.
Referring to the FIGURES 3a and 3b of the accompanying drawings, the at least one auxiliary air conditioning unit 110, 210 has a compact configuration and can be packaged underneath at least one of a driver seat 40 or a co-driver seat 50 of the vehicle 200. The compact configuration of the at least one auxiliary air conditioning unit 110, 210 is due to the offset arrangement of the evaporator 112, 212 with respect to the fan system and selection of suction type fan system that is disposed downstream of the evaporator, due to such compact configuration of the at least one auxiliary air conditioning unit 110, 210, the at least one auxiliary air conditioning unit 110, 210 can be disposed in otherwise unused and limited space within a cabin of the vehicle 200. FIGURE 3a illustrates a schematic representation of the vehicle 200 configured with either one of the heating ventilation and air conditioning system 100a and 100b, wherein the at least one auxiliary air conditioning unit 110, 210 is depicted disposed under the driver seat 40 of the vehicle 200. FIGURE 3b illustrates a schematic representation of the vehicle 200, wherein the at least one auxiliary air conditioning unit 110, 210 is depicted disposed under the co-driver seat 50 of the vehicle 200. However, the present invention is not limited to any particular location inside the vehicle cabin for disposing the at least one auxiliary air conditioning unit 110, 210 and the same can be disposed in any other wise unused space anywhere inside the vehicle cabin until at least a portion of the evaporator 112, 212 is in contact with the inside cabin air to facilitate heat extraction Qae from the

inside cabin air. With the at least one auxiliary air conditioning unit 110, 210 disposed underneath at least one of the driver seat 40 and the co-driver seat 50, effective directing of conditioned air at different directions, particularly, towards the rear seat passengers of the vehicle to effectively cater to the air conditioning needs of the rear seat passengers is made possible. Also, with such strategic placement of the auxiliary air conditioning unit 110, 210 underneath the driver seat 40 or the co-driver seat 50 of the vehicle 200, the auxiliary air conditioning unit 110, 210 is disposed close to the main air-conditioning unit 10 and as such need of long refrigerant lines and pressure drop resulting from use of long refrigerant lines is avoided, and accordingly, even a low power compressor 114 can be used, thereby improving fuel economy of the vehicle, specifically, the vehicle configured with the auxiliary air conditioning unit 110, 210 exhibits comparatively better fuel economy than the vehicle configured with a conventional-auxiliary air conditiorijng unit.
The vehicle 200 further includes at least one sensor 60 disposed inside the cabin of the vehicle 200 for detecting air conditioning parameters inside the cabin of the vehicle 200. At least one of the main air conditioning unit 10 and the at least one auxiliary air conditioning unit 110, 210 is configured with individual controls for independently controlling operation of at least one of the main air conditioning unit 10 and the at least one auxiliary air conditioning unit 110, 210. Particularly, similar to the main air conditioning unit 10, the at least one auxiliary air conditioning unit 110, 210 is also configured with individual controls that enable the rear seat passengers to change temperature, blower speed and other such parameters associated with the auxiliary air conditioning system as per his personal requirements. At least one of the main air conditioning unit 10 and the at least one auxiliary air conditioning unit 110, 210 operates in either one of manual mode and automatic mode, in the manual mode at

least one of the main air conditioning unit 10 and the at least one auxiliary air conditioning unit 110, 210 operates based on selections made by user for controlling air conditioning parameters inside the cabin of the vehicle 200, whereas in the automatic mode at least one of the main air conditioning unit 10 and the at least one auxiliary air conditioning unit 110, 210 automatically operates in response to selections made by a control unit 70 based on air conditioning parameters detected inside the cabin of the vehicle 200 by the at least one sensor 60. However, the present invention is not limited to any particular configuration, number and placement of the at least one sensor 60 inside the cabin of the vehicle, as far as the at least one sensor 60 is capable of detecting air conditioning parameters inside the cabin of the vehicle 200.
A Heating Ventilation and Air-Conditioning system 100a, 100b for a vehicle 200 is disclosed in accordance with an embodiment of the present invention. The Heating Ventilation and Air-Conditioning system 100a, 100b includes a main air conditioning unit 10 and at least one auxiliary air conditioning unit 110, 210, wherein at least one of the main air conditioning unit 10 and the vehicle 200 derives operating power from a main drive 20, whereas the at least one auxiliary air conditioning unit 110, 210 derives operating power from an auxiliary drive 120 configured in the vehicle 200 that is other than the main drive 20. The at least one auxiliary air conditioning unit 110, 210 is packaged underneath at least one of a driver seat 40 and a co-driver seat 50 of the vehicle 200.
Several modifications and improvement might be applied by the person skilled in the art to the vehicle as defined above, as long as it comprises a Heating Ventilation and Air-Conditioning system, a main drive and an auxiliary drive other than the main drive, the Heating Ventilation

and Air-Conditioning system is configured with a main air conditioning unit and at least one auxiliary air conditioning unit, the main drive provides operating power to at least one of the vehicle via a transmission and the main air conditioning unit, whereas the auxiliary drive provide operating power to the at least one auxiliary air conditioning unit. The at least one auxiliary air conditioning unit is packaged underneath at least one of a driver seat and a co-driver seat of the vehicle.
Obviously, numerous modifications and variations of the present invention are possible in light of the above teachings. It is therefore to be understood that the invention may be practiced otherwise than as specifically described herein.
In any case, the invention cannot and should not be limited to the embodiments specifically described in this document, as other embodiments might exist. The invention shall spread to any equivalent means and any technically operating combination of means.

WE CLAIM:
1. A vehicle (200) comprising a Heating Ventilation and Air-Conditioning system (100a,100b), a main drive (20) and an auxiliary drive (120) other than said main drive (20), said Heating Ventilation and Air-Conditioning system (100a, 100b) is configured with a main air conditioning unit (10) and at least one auxiliary air conditioning unit (110, 210), said main drive (20) is adapted to provide operating power to at least one of the vehicle (200) via a transmission (30) and said main air conditioning unit (10), whereas said auxiliary drive (120) is adapted to provide operating power to said at least one auxiliary air conditioning unit (110, 210), said at least one auxiliary air conditioning unit (110, 210) is adapted to be packaged underneath at least one of a driver seat (40) and a co-driver seat (50) of the vehicle (200).
2. The vehicle (200) as claimed in claim 1, wherein said main air conditioning unit (10) comprises an evaporator (12), a compressor (14), a condenser (16) and an expansion device (18), wherein said compressor (14) is driven by said main drive (20) that is at least one of an engine and a motor depending on whether the vehicle (200) is an electric vehicle, an engine powered vehicle and a hybrid vehicle.
3. The vehicle (200) as claimed in one of claim 1 or 2, wherein said at least one auxiliary air conditioning unit (110) comprises, an evaporator (112), a compressor (114), a condenser (116) and an expansion device (118), wherein said compressor (114) is driven by said auxiliary drive (120).
4. The vehicle (200) as claimed in claim 2, wherein said at least one auxiliary air conditioning unit (210) comprises an evaporator (212), a compressor (214) and an expansion device (218), wherein said

compressor (214) is driven by said auxiliary drive (120), said at least one auxiliary air conditioning unit (210) is further functionally coupled to said condenser (16) of said main air conditioning unit (10) so as to facilitate operation of said at least one auxiliary air conditioning unit (210) without requiring operation of said main air conditioning unit (10).
5. The vehicle (200) as claimed in one of claim 3 or 4, wherein said at least one auxiliary air conditioning unit (110, 210) comprises a fan system and said at least one auxiliary air conditioning unit (110, 210) is compact in configuration due to lateral offset arrangement of said evaporator (112, 212) with respect to said fan system and selection of suction type fan system disposed downstream of the evaporator (112, 212), accordingly, said at least one auxiliary air conditioning unit (110, 210) is adapted to be disposed in otherwise unused and limited space within a cabin of the vehicle (200).
6. The vehicle (200) as claimed in one of the preceding claims, wherein said auxiliary drive (120) is at least one of a small engine and a motor that is different from said at least one of engine and motor driving the vehicle (200).
7. The vehicle (200) as claimed in one of the preceding claims, wherein at least one of said main air conditioning unit (10) and said at least one auxiliary air conditioning unit (110, 210) is configured with individual controls for independently controlling operation thereof.
8. The vehicle (200) as claimed in one of the preceding claims, further comprising at least one sensor (60), at least one of said main air conditioning unit (10) and said at least one auxiliary air conditioning unit (110, 210) is adapted to operate in either one of manual mode and automatic mode, in said manual mode at least one of said main air

conditioning unit (10) and said at least one auxiliary air conditioning unit (110, 210) operates based on selections made by user for controlling air conditioning parameters inside said cabin of the vehicle (200), whereas in said automatic mode at least one of said main air conditioning unit (10) and said at least one auxiliary air conditioning unit (110, 210) automatically operates in response to selections made by a control unit (70) based on air conditioning parameters detected inside said cabin of the vehicle (200) by said at least one sensor.
9. The vehicle (200) as claimed in one of claim 3 or 4, wherein said
compressor (114, 214) is a rotary compressor that is compact in
configuration.
10. A Heating Ventilation and Air-Conditioning system (100a, 100b) for a
vehicle (200), said Heating Ventilation and Air-Condltioning system (100a,
100b) comprising a main air conditioning unit (10) and at least one
auxiliary air conditioning unit (110, 210), wherein at least one of said main
air conditioning unit (10) and the vehicle (200) is adapted to derive
operating power from a main drive (20), whereas said at least one auxiliary
air conditioning unit (110, 210) is adapted to derive operating power from
an auxiliary drive (120) configured in the vehicle (200) that is other than
said main drive (20), said at least one auxiliary air conditioning unit (110,
210) is adapted to be packaged underneath at least one of a driver seat
(40) and a co-driver seat (50) of the vehicle (200).