FORM - 2
THE PATENTS ACT, 1970
(39 of 1970)
PROVISIONAL SPECIFICATION -
(Section 10 and Rule 13)
TITLE of the Invention:
"AN IMPROVED AIR CONDITIONING SYSTEMS TO PROVIDE QUALITY AIR AND CAPABLE TO BE OPERATED ON LOW POWER"
Applicant's Name and Address -
APPLICANT: ARUN GUPTA, ADDRESS :- E-4 /123, ARERA COLONY, BHOPAL - 462 016 ,MADHYA PRADESH
The following specification particularly describes the nature of this invention and the manner in which it is to be performed.

FIELD OF THE INVENTION
The innovative features which the inventor is presenting is firstly to improve the Indoor Air Quality & to overcome the ill effects on health due to depletion of oxygen level in the room being air conditioned by split type of air conditioners . The second feature is an improvement in the electrical circuit which enables the user to run the blower of the indoor unit alone in case of failure of power supply through the normal inverter. The systems will comprise of an outdoor unit housing the compressor , condensing coiis , cooling fan , expansion valve & essentially the fresh air blower / compressor the operation of which can be preset using a remote to control the quantity & frequency of fresh air to be added in the room. The indoor unit comprises of the blower which re circulates the room air, cooling coils, fresh air discharge "U " tubes , air direction control vanes & infra red remote sensors.
BACK GROUND INVENTION:-
The conventional air conditioning can be classified in to three categories namely Window, Split & Centra! (packaged) Air conditioning systems. There are lot of parameters which needs to be taken in to consideration for specifying the right kind & capacity of the AC for a particular use. There are number of occasions when the space to be air conditioned do not have an exterior wall or even if it has the architects do not recommend the window ACs because of aesthetic reasons. In some other cases there are limitations of central air conditioning systems because of high investments & conditions where in only a specific area needs to be air conditioned. To optimize the efficiency of the air conditioning systems the manufacturers recommend that all the windows & doors be kept closed. Fresh air cannot enter the room even when the door is opened and the windows are closed because there will is no cross ventilation.
In operation theaters, patient preparation & recovery rooms which do not have any external walls have to be air conditioned using split units with wall/ floor mounted in door

units. The open able windows of the OTs if any are tightly closed to avoid entry of bacterial infections pollution from outside. The OTs normally have multiple entrance doors due to which the chances of entry of fresh air are negligible. The inside atmosphere is filled with the smell of medicines, blood, & body waste material etc.
Conventional Split AC means re circulating the same air over and over again and it is quite possible that a patient in the OT picks up an infection from a patient who has had an operation before him. Bacteria are normally of 1 micron. To ensure that bacteria are filtered, it is necessary to have special filters which can filter up to 0.3 microns. It is also important to circulate the air many times through this filter pad so that the bacteria get filtered- Hence, a very high volume of air has to be circulated through the filter pads. The air conditioner with this innovative feature will easily overcome this requirement of surgeons.
More over the oxygen level goes down fast as the OT is occupied with large number of medical professionals continuously working for long hours as the operations are lined up one after the another. Thus the need of fresh air is of vital importance.
In bar rooms , discotheques , spa , gyms /estaurants or pubs which do not have an external wall and have to be air conditioned through split air conditioning , not only a drop in the quality of atmosphere inside the hall is felt but these spaces being used day in & day out a permanent unpleasant foul smell is observed . More over the smoke being heavier than air tends to stay in the air conditioned area. This is felt even more in the basements or carpeted rooms where the food & beverages have spilled over a period of time.
In class rooms, conference halls & mini theatres, multiplexes the open able windows if any are closed & the door opens intermittently for short periods only, resulting in fast depletion of oxygen level leading to human discomfort & creating an unhealthy atmosphere for the inhabitants.
A Software office is normally heavily populated. Moreover, computer systems, printers, photo copy machines, other office equipment & carpets etc , need a larger quantity of

fresh air than normal, it is recommended to use at least 15 Cfm of fresh air per person but this does not happen in case of the conventional split ACs because there is no scope for entry of fresh air.
An average person needs 0.85 Kgs of Oxygen per day under normal working & sleeping conditions. In a hypothetical situation in which if the average person keeps on doing hard work continuously for 24 hours the requirement of Oxygen shoots up to 7.3 Kgs per day. Under normal conditions the air we inhale has 21 % of Oxygen which reduces to 16 % in the air which we exhale. The lowest percentage of Oxygen required for a person to survive at standard pressure is 17.5 %. Human beings can fell un conscious if they continue to breathe . air which has less than 17.5 % of Oxygen .Studies have shown that in a closed class room of 2464 Cu Ft (22' X 14 ' X 8 ' ) with 35 adult students , in just two hours the normal oxygen level of 21% falls to 19.5 % which is the lower limit below which the human beings starts feeling uncomfortable.
The electrical load of the air conditioners are high as such they stop functioning as soon as there is apower failure as the normal invertors even if installed cannot take the load of the outdoor & the indoor unit simultaneously.
. To avoid all the above unwanted negative conditions the inventor has incorporated two innovative features to the existing split & cassette air conditioners in which a fresh air blower / compressor is installed in the outdoor unit which draws fresh air from the atmosphere & discharges it in the room, thereby increasing the oxygen level of the room & optimizing the comfort level of the room . The feature also removes the smoke & foul smell from the space being air conditioned. The indoor air quality is thus improved and a healthier atmosphere is created. Secondly the modification in the electrical circuit enables the user to run the blower of the indoor unit alone drawing the power from the normal invertors there by re circulating the cold air and providing some comfort to the user.

BRIEF DESCRIPTION OF THE INVENTION:
Fig : 1 - Is a flow diagram of the refrigerant cycle . The refrigerant enters the suction side of the compressor as low pressure warm gas & leaves as hot high pressure gas. Due to the condensation process in the air cooled condenser coils of the out door unit the hot high pressure gas converts in to warm liquid. This warm liquid passes through the small opening of the expansion valve thereby expands thus reducing the pressure & the refrigerant partly turns in to low pressure gas The refrigerant which is in the form of low pressure gas is made to pass through the cooling coils of the indoor unit, it draws the heat of the room being air conditioned for evaporation there by lowering down the temperature of the room . The warm low pressure refrigerant gas leaves the indoor unit to the compressor. The air inside the room is re-circulated continuously thus cooling the indoor air of the room making it comfortable for human beings. The moisture present in the air inside the room condenses on the cooling coils, trickles down & passes through the drain pipe which is either collected in a carboy or is directed to the waste water drain line.
Fig : 2 - Is a the schematic diagram of the indoor unit of the wall mounted air conditioner. The suction area of the indoor unit 1 from where the blower draws in air which passes through the filters & the cooling coils. The refrigerant in the cooling coils evaporates by utilizing the heat of the room air. The cool air is blown out by the blower 6 the direction of air flow is monitored by vanes 8.The fresh air tubing 2 is run along with the return refrigerant line 3 .The refrigerant enters the cooling coils through the inlet line 4,where as the power supply is provided through the cable 5.The infra red remote sensors & the LED lights are as displaced at 7.
Fig: 3 - Is a the schematic diagram of the outdoor unit 8 placed on the roof top. The discharge 4 of the fresh air blower 1 is run along with the return line of the refrigerant 5 from the wall mounted indoor unit 7. The cooling fan 2 cools the condenser coils thereby condenses the hot refrigerant gas in to warm refrigerant liquid. All the copper tubing from the outdoor unit are made to pass through an opening made in the parapet wall, then run

along the external side of the wall, further passes through another opening in the wall & finally reaching the indoor unit 7 which may be wall or floor mounted. The cables 6 carry the power from the indoor unit to the outdoor unit to control the operations of the compressor, cooling fan & the fresh air fan.
Fig: 4 - Is a sectional plan view of the outdoor unit placed on the roof top. The compressor 6, condensing coils 2, condenser fan 1, fresh air blower 3, capacitor 5, etc are displayed .
Fig: 5 - are the elevation, plan & end views of the outdoor unit of the split type of air conditioner.
Fig : 6 - is the schematic diagram of the remote which controls the operation of the compressor, fresh air blower of the outdoor unit & the operation of the blower, its speed , the movement of the of the air direction vanes of the indoor unit . Options related to the quality of the air like dry, cool, & speed of the air throw can be adjusted. The frequency & duration of the fresh air can be preset as desired by the user. The functions of all the keys are mentioned on the Fig.6 itself and the settings are displayed in the LED window.
DETAILED DESCRIPTION:-
The refrigeration cycle with an innovative added feature:
In the conventional refrigerant cycle heat is removed from a colder medium & rejected it to a warmer medium by using the latent heat properties of the refrigerant. The five basic components required for mechanical refrigeration are the compressor (normally hermetically sealed), condenser, thermostatic expansion valve, the evaporator and the copper tubes connecting these air conditioner parts.
The refrigerant gas enters the compressor as warm, low pressure gas & leaves the compressor as hot, high pressure gas. In the condenser coils which are air cooled the hot, compressed refrigerant gas loses heat to the outdoor air & becomes warm liquid, which further passes through the expansion valve. This is also known as the metering device is the dividing point between the high side & low side of the air conditioner units. A capillary tube

connects the expansion valve & the remote sensing bulb mounted on the suction line of the compressor. The recent development in the design of the capillary tube for air conditioning system is to use a long capillary tube with a larger inside diameter to avoid chocking of the capillary tube due to impurities in the refrigerant or oil. The capillary tube equalizes the pressure in the system when the unit is shut down, this characteristics allows a low starting torque to the motor of the compressor. This cycle is as shown in Fig 1.
In the cooling coils or the evaporator the refrigerant usually enters from the bottom & boils using the latent heat properties of the refrigerant as it move upwards taking the heat of the indoor air & leaves the coils as warm low pressure gas. The indoor air loses moisture as it is chilled. The moisture trickles down & collects in a carboy or goes down in the waste water drain.
The changes in the temperature & pressure of the refrigerant as it passes from the compressor to the condenser, expansion valve evaporator & back to the suction of the compressor are displayed in the PH chart - Fig 7. The mixture of the refrigerant in liquid & gas form are as shown in yellow. The red color displays the high pressure, high temperature where as the blue color indicates the refrigerant in low pressure condition.
In the conventional system the same air inside the room is being re circulated over & over again. Even if the door alone is opened fresh air will not enter the space until & unless the window is also opened. The air conditioner manufacturers recommend that all the doors & windows are tightly closed for optimum efficiency of the air conditioner & also to save power. This in turn reduces the oxygen level because there is no scope of entry of fresh air in the room there by increasing the carbon di oxide levels which leads to human discomfort & unhealthy conditions. To avoid the above conditions the inventor has incorporated an innovative feature to the existing split air conditioners in which a fresh air blower/ compressor is installed in the outdoor unit which draws fresh air from the atmosphere & discharges it in the room, thereby increasing the oxygen level of the room , dilutes the foul air thereby improving the quality of indoor air. The operation of which can be pre set by the user.

This fresh air blower / compressor installed in the outdoor unit draws air at atmospheric temperature which is high as such if pumped directly in to the room shall raise the temperature inside the room. To avoid this the copper tubing of the fresh air is run along with the copper tubing of the return refrigerant passing from the cooling coils of the indoor unit to the suction of the compressor. Since both the copper tubes are run in the same insulation covering, the heat exchange reduces the temperature of the fresh air being pumped in to the room.
The fresh air - perforated copper tubing is bent in "U " shape & run below the plastic grill of the suction area of the blower of the indoor unit, thus the fresh air & the re-circulated air of the room are mixed & made to pass through the cooling coils & gets cooled further before being discharges in to the room.
The power circuit of the fresh air blower & electronics circuit of the remote have been tailor designed so that if desired the fresh air blower can be run alone without switching on the indoor or the outdoor unit of the AC. Thus the room to be air conditioned can be charged up with fresh air even before the room is to be taken in to use. Secondly this can also be used alone without the air conditioner being switched on to provide a fresh & healthy atmosphere during the winters when the AC is not required.
The operation of the fresh air blower / compressor can be preset by the user by a modified version of the conventional remote. The operation of this fresh air mechanism can be programmed as per the heat load of the room which varies with the heat load ie. The size of the room, the number of occupants & the type of activity being done in the room. There are two parameters which can be set viz . The frequency of operation of the blower & the duration for which it is supposed to run.
The electrical & electronic circuit has been modified to get the benefit of the two features added to the conventional air conditioning system. To enable the fresh air blower to run alone without switching the air conditioner "on", the remote controller has been modified.

The circuit of the power supply to the blower of the indoor unit has been so designed so as to enable it to run separately, on supply through the inverter in case of power supply.
CLAIMS:
1 An air conditioner of split / cassette type with a fresh air blower / air compressor mounted in the outdoor unit to add fresh air to the room / hall being air conditioned , so as to increase the oxygen level of the air inside the room , thereby improving the quality of air inside the room, removing the foul smell & smoke if present.
2 The power load of air conditioners being high cannot be taken over by the inverter in case of power failure. This new air conditioner the in door unit has a circuit which enables the user to run the blower alone through the supply of the normal low capacity inverter in case of power failure. Thus this feature enables to continue re circulating the coo! air providing some comfort as a stop gap arrangement till the power is restored or till the batteries of the inverter can support the running of the blower.
3 The above innovative features are added to the conventional air conditioner which has an outdoor unit which houses the fresh air blower to add fresh air to the -room , compressor, condenser & the indoor unit which houses the cooling coils, blower, the perforated fresh air discharge tubing in "U" shape , air direction vanes , air filters and infra red remote sensors.
4 The operation of which can be controlled by a remote as preset & desired by the user. The fresh air blower discharges the fresh air in the room there by increasing the oxygen level of the air inside the room, thereby improving the quality of air inside the room, removing the foul smell & smoke if present.
3. The Function of the fresh air can be preset by the user using remote control. There are two exclusive & additional parameters which can be set viz the frequency of operation of the air blower & the duration for which this blower is to be kept on.

4. Depending on the use the room to be air conditioned is put to, the user can set the above said parameters as per his/ her comfort level, to add the fresh air & also to remove the foul smell & smoke if present.
5. If the user wants to be very specific about the oxygen level a sensor can also be installed which will be activated as soon as the oxygen concentration measurement device triggers the on / off switch of the fresh air fan motor at a prescribed oxygen thresh hold limit & will switch off the fresh air blower as soon as the desired level of oxygen is achieved.
6. The air conditioner as recited in claim wherein the preselected set of rules will turn the blower on & off as per settings done by the user through the remote control.
7. The electrical & electronic circuit has been modified to get the benefit of the two features added to the conventional air conditioning system. To enable the fresh air blower to run alone without switching the air conditioner "on" , the remote controller has been modified. The circuit of the power supply to the blower of the indoor unit has been so designed so as to enable it to run separately, on supply through the inverter in case of power supply.