FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
As amended by the Patents (Amendment) Act, 2005
&
The Patents Rules, 2003
As amended by the Patents (Amendment) Rules, 2006
COMPLETE SPECIFICATION
(See section 10 and rule 13)
TITLE OF THE INVENTION
Refrigerator cum atmospheric water extractor
APPLICANTS
Electrowater Technologies Private Limited, DGP House. 5 Floor, 88C Old Prabhadevi Road, Mumbai 400 025, Maharashtra, an Indian company
PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be performed:

FIELD OF THE INVENTION
This invention relates to a refrigerator cum atmospheric water extractor.
BACKGROUND OF THE INVENTION
Refrigerators are generally used to refrigerate or freeze perishable or degradable food articles and preserve them and have become almost an integral part and an essential utility of day to day life. A refrigerator mainly comprises a thermally insulated cabinet with multiple compartments and a compressor forming a closed refrigerant recirculation loop with an evaporator, an expansion device and a condenser. It also comprises a thermostat located in the cabinet and a microcontroller for sensing the temperature in the cabinet through the thermostat and controlling the operation of the compressor to maintain the required or set temperature conditions in the cabinet.
Moisture in the atmospheric air is a rich source of water and several devices are reported to extract water from the atmosphere, (US2409624, 2499982, 2761292, 3675442, 5106512, 5149446, 5259203, 5301516, 5517829, 5553459, 5701749, 6029461, 6289689, 5669221, 5845504, 6182453, 5857344, 6343479, 6505477, 6116034, 6453684, 6574979, 67051074, 6755037, 6799430, 7343754, 8196422, and 8118912, WO2006/049387A1, WO 2007/133771A2 and WO2009/048986). In our Indian Patent Application No 3023/MUM/2012 filed on 16 October 2012, we have described an atmospheric water extractor comprising a first condenser, a second condenser, at least one first air blower, a heat sink, a compressor and at least one second air blower. The compressor forms a closed refrigerant recirculation loop with the condensers and

heat sink. The water extractor also comprises a microcontroller for operating the water extractor.
In order to achieve the dual purpose of refrigeration and atmospheric water extraction, it is necessary to have both the refrigerator and water extractor installed separately and to operate both the machines independently. This not only increases the capital cost and running cost by way of maintenance and power consumption because of the components like two compressors and two microcrontrollers configured to operate both the machines separately and independently but also the space requirement for the occupation thereof. Besides, both the machines are to be switched on and switched off separately as and when required with two different on/off switches. This is inconvenient and cumbersome for the user to carry out. Cost is further increased as both the refrigerator and water extractor require separate on/off switches for their operation. The number of connector pipes required for forming separate refrigerant recirculation loops of the water extractor and refrigerator is large thereby further increasing the cost. There is thus need for a judicious and ingenious integration and combination of both the equipments in a cost effective and efficient manner to achieve the dual purpose of refrigeration and water extraction as required.
DETAILED DESCRIPTION OF THE INVENTION
According to the invention there is provided a refrigerator cum atmospheric water extractor, wherein the refrigerator comprises a thermally insulated cabinet with multiple compartments, an evaporator with atleast one fan mounted in the cabinet, the evaporator having a refrigerant inlet end and a refrigerant outlet end and a condenser mounted to the cabinet and having a refrigerant inlet end and a refrigerant outlet end connected to the refrigerant inlet of the evaporator through a

first expansion device and a thermostat located in the cabinet and wherein the atmospheric water extractor comprises a first condenser, a second condenser, at least one air blower, a heat sink and at least one second air blower, the first air blower, first condenser and second condenser of the water extractor are mounted on a water collection tray with the first air blower disposed in front of the first condenser and the water collection tray mounted to the cabinet, a removable perforated housing disposed over the first air blower, first condenser, second condenser and water collection tray of the water extractor, the first condenser of the water extractor comprises a perforated plate and tube heat exchanger, in which the tube extends on the entire perforated plate in multiple turns and has a refrigerant inlet end and a refrigerant outlet end. the second condenser of the water extractor comprises a shell and tube heat exchanger disposed behind the first condenser of the water extractor and has a shell defined by a pair of opposing vertical walls of slitted structure disposed in spaced apart relationship with each other with the opposite sides open and held together at the bottom and top thereof and a tube extending on the entire vertical walls in multiple turns and having a refrigerant inlet end and a refrigerant outlet end, the second air blower of the water extractor and the heat sink are located outside the perforated housing and mounted to the cabinet exposed to the atmosphere with the second air blower of the water extractor disposed close to the heat sink, the heat sink comprises a shell and tube heat exchanger defined by a pair of vertical side walls of slitted structure disposed in spaced apart relationship with each other with the opposite sides open and held together at the bottom and top thereof and a tube extending on the entire vertical walls in multiple turns and having a refrigerant inlet end and a refrigerant outlet end, the refrigerant outlet end of the tube of the heat sink is connected to the refrigerant inlet ends of the tubes of the first and second condensers of the water extractor through an expansion device, a water collection tank mounted to the cabinet and connected to

the water collection tray and provided with a water dispenser and a water level sensor disposed in the water collection tank, and wherein the refrigerator and water extractor are functionally integrated with a common compressor mounted to the cabinet and having a refrigerant inlet end connected to the refrigerant outlet ends of the tubes of the first and second condensers of the water extractor and the refrigerant outlet of the evaporator and further having a refrigerant outlet connected to the refrigerant inlet of the condenser of the refrigerator and refrigerant inlet end of the tube of the heat sink to form a closed refrigerant recirculation loop with the heat sink, condensers and evaporator and with a common microcontroller configured to sense the water level in the water collection tank through the water level sensor and temperature in the cabinet through the thermostat and to control the operation of the air blowers and fan and also to control the operation of the refrigerator and water extractor in a synchronized and interdependable manner, the microcontroller being operable with an AC power supply through an on/off switch.
BRIEF DESCRIPTION OF THE ACCOMPANYING SCHEMATIC DRAWINGS
Fig 1 of the accompanying drawings is an isometric view of a refrigerator cum atmospheric water extractor according to an embodiment of the invention without the perforated housing;
Fig 2 is another isometric view of the refrigerator cum atmospheric water extractor of Fig 1 including the perforated housing;
Fig 3 is a view of the refrigerant recirculation loop formed by the compressor with the heat sink, condensers and evaporator of the refrigerator cum atmospheric water extractor of Fig 1;
Fig 4 is a partial top isometric view of the first condenser mounted on the water collection tray of the water extractor of the refrigerator cum atmospheric water extractor of Fig 1;

Fig 5 is an isometric view of the water collection tray of the water extractor of the refrigerator cum atmospheric water extractor of Fig 1;
Figs 6 and 7 are front and back isometric views of the perforated housing of the water extractor of the refrigerator cum atmospheric water extractor of Fig 1;
Figs 8 and 9 are front view and isometric view of the perforated plate and tube condenser of the water extractor of the refrigerator cum atmospheric water extractor of Fig 1;
Figs 10 and 11 are front view and isometric view of the second condenser of the water extractor of the refrigerator cum atmospheric water extractor of Fig 1;
Fig 12 is ascrap view of a vertical wall of the second condenser of Figs lOand 11;
Fig 13 is a view of the configuration of the electric/electronic components of the refrigerator cum atmospheric water extractor of Fig 1;
Fig 14 is a view of the refrigerant recirculation loop of a refrigerator cum atmospheric water extractor according to another embodiment of the invention;
Fig 15 is a view of the configuration of the electric/electronic components of the refrigerator cum atmospheric water extractor of Fig 14; and
Fig 16 is a view of the configuration of the electric/electronic components of the refrigeration cum atmospheric water extractor according to another embodiment of the invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS OF THE INVENTION
The refrigerator cum atmospheric water extractor 1A as illustrated in Figs 1 to 13 of the accompanying drawings comprises an integrated combination of a refrigerator 2 and an atmospheric water extractor. The refrigerator 2 comprises a thermally insulated cabinet 3 with multiple compartments (not shown). The refrigerator also comprises an evaporator 4 with a fan 5 mounted in the cabinet. The evaporator has a refrigerant inlet end 6 and a refrigerant outlet end 7. 8 is a condenser mounted at the back of the cabinet and having a refrigerant inlet end 9 and a refrigerant outlet end 10 connected to the refrigerant inlet end 6 of the evaporator through a first expansion device 11. 12 is a thermostat located in the cabinet.
The atmospheric water extractor of the combination is substantially the same as that of Patent application No 3023/MUM/2012 and comprises a first condenser 13, a second condenser 14, a first air blower 15, a heat sink 16 and a second air blower 17. The first air blower, first condenser and second condenser are mounted on a water collection tray 18 with the first air blower disposed in front of the first condenser. The water collection tray is mounted at the top of the cabinet. A detachable perforated housing 19 (perforations marked 20) is disposed over the first air blower, first condenser, second condenser and water collection tray. The first condenser comprises a perforated plate 21 (perforations marked 22) and a tube 23 extending on the entire perforated plate in multiple turns and having a refrigerant inlet end 24 and a refrigerant outlet end 25.
The second condenser 14 comprises a shell and tube heat exchanger disposed behind the first condenser and having a shell defined by a pair of opposing vertical walls 26, 26 of slitted structure disposed in spaced apart relationship with each other with the opposite sides open

marked 27, 27 and held together at the bottom with a bottom connecting member 28 and at the top with a top connecting member 29. 30 is a tube extending on the entire vertical walls in multiple turns and having a refrigerant inlet end 31 and a refrigerant outlet end 32. The slitted structures of the vertical walls are formed by arranging slats or louvers 33 in spaced apart relationship with one another and holding them together. The spaces between the slats or louvers are marked 34. As shown in Fig 9, the perforated plate of the first condenser is U-shaped and is adapted to be detachably press or push fitted over the sides of the vertical walls of the second condenser in spaced apart relationship with the confronting vertical wall of the second condenser.
The heat sink 16 and second air blower 17 are located outside the perforated housing 19 and are mounted to a sidewall of the cabinet 3 exposed to the atmosphere with the second air blower disposed in front of the heat sink. The heat sink is similar in construction to the second condenser illustrated in detail in Figs 9, 10 and 11. The refrigerant inlet end and refrigerant outlet end of the tube of the heat sink are marked 35 and 36 respectively. The refrigerant outlet end 36 of the tube of the heat sink is connected to the refrigerant inlet ends 24 and 31 of the tubes of the first and second condensers respectively through a second expansion device 37. 38 is a water collection tank mounted to another sidewall of the cabinet and connected to the water collection tray with a connector pipe 39. The water collection tank is provided with a water dispenser comprising a tap 40. The water collection tank is also provided with a water level sensor, preferably an electronic sensor 41.
42 is a common compressor having a refrigerant inlet end 43 connected to the refrigerant outlet ends 25 and 32 of the tubes of the first and second condensers 13 and 14, respectively and the

refrigerant outlet 7 of the evaporator through an accumulator 44. The compressor also has a refrigerant outlet 45 connected to the refrigerant inlet 9 of the condenser 8 of the refrigerator and refrigerant inlet end 35 of the heat sink 16 of the water extractor to form a closed refrigerant recirculation loop with the heat sink 16, condensers 13 and 14 and condenser 8 and evaporator 4 (Fig 3). 46 is a common microcontroller configured to sense the water level in the water collection tank through the sensor 41 and temperature in the cabinet through the thermostat 12 and to control the operations of the compressor 42 and air blowers 15 and 17 and fan 5. The microcontroller is operable with an AC power supply 47 through an on/off switch 48. 49 is an overload cut out circuit through which the microcontroller is connected to the compressor.
The outer surface of the first and second condensers 13 and 14 of the water extractor is preferably and advantageously plasma treated. Preferably, the outer surface of the first and second condensers is plasma treated by subjecting the condensers to a high ion discharge at 25000 to 50000 volts for 20 to 30 seconds for each cm2 surface area of the condensers.
The perforated housing 19and water collection tank 38 are preferably made of food grade moulded plastics. The perforated plate 21 of the first condenser 13 and shells of the second condenser 14 and heat sink 16 are preferably made of stainless steel. The water collection 18 tray is preferably made of food grade moulded plastics or stainless steel. The tubes of the first and second condensers and heat sink are preferably made of copper. The refrigerator inlet 43 of the compressor 42 is connected to the refrigerant outlet ends 25 and 32 of the tubes of the first and second condensers 13 and 14 and the refrigerant outlet 7 of the evaporator 4 and the refrigerant outlet 45 of the compressor is connected to the refrigerant inlet end 35 of the tube of the heat sink 16 and refrigerant inlet 9 of the condenser 8 of the refrigerator and the refrigerant

outlet end 36 of the tube of the heat sink is connected to the refrigerant inlet ends 24 and 31 of the first and second condensers through connector pipes which are preferably made of copper. The water extractor optionally comprises operational status indicator having preferably two differently coloured LEDs say blue and red 50 and 51 respectively. The operational status indicator optionally includes an audio alarm such as hooter (not shown).
On starting the refrigerator cum water extractor of the invention by switching on the on/off switch 48, the microcontroller 46 operates the compressor 42. the fan 5 and the air blowers 15 and 17. The compressor compresses the refrigerant (not shown) in the refrigerant recirculation loop and recirculates the refrigerant through the condenser 8 and evaporator 4 of the refrigerator 2 and also through the condensers 13 and 14 and heat sink 16 of the water extractor simultaneously. Atmospheric air being sucked in through the perforations 20 in the perforated housing 19 and blown on to the perforated plate 21 of the first condenser 13 by the first blower 15 flows also through the spaces 34 in the vertical walls of the second condenser 14 and through the open sides 28 between the vertical walls of the second condenser.
Due to the chilling or cooling effect of the refrigerant flowing through the tubes 23 and 30 of the condensers of the water extractor, moisture in the atmospheric air condenses on the first and second condensers of the water extractor and the water drips down into the water collection tray 18. Water in the water collection tray flows down into the water collection tank 38 via the connector pipe 39 and is withdrawn by opening the tap 40. One of the LEDs namely the green LED 50 glows and indicates that the water extractor is in the operative mode. The other LED, namely the red LED 51 starts glowing when the water collection tank is about to be full indicating to the user that the tank needs to be emptied. The hooter, if present, also raises an

audio alarm alerting the user to empty the water collection tank when the water collection tank is about to be full. Therefore, even if the user is away from the refrigerator cum water extractor and cannot see the glowing red LED, the user will be still alerted by the hooter.
Because of the perforated nature of the housing 19 there is practically uninterrupted flow of atmospheric air into the housing and the water extractor of the invention is also at the atmospheric pressure. This helps to minimize formation of ice within the housing. The perforated housing allows a large volume of atmospheric air to enter the housing. The two condensers 13 and 14 and the perforated plate and slitted structure and open sides thereof provide a very large surface area of contact for the large volume of atmospheric air thereby allowing a large volume of moisture in the air to condense and drip down into the water collection tray 18. At the same time, the perforations in the housing 19 and the perforated plate and slitted structure of the condensers and open sides of the condensers also provide free passage for the air to exit the housing allowing more air to enter the housing. As a result of the increased condensation area and air flow, the amount of water extracted from the atmosphere by the water extractor is increased. The plasma treatment of the condensers 13 and 14 will have improved hydrophilic properties thereby further increasing condensation of moisture in the air and quantity of water extracted from the atmosphere.
It has been found that the water obtained by the water extractor of the invention is potable and quite safe and fit for human consumption and that conventional water purifying techniques like chemical treatments or irradiant techniques are not necessary to obtain potable water according to the water extractor of the invention and that such treatments and techniques can be eliminated as explained in our patent application No 3023/MUM/2012. The water extractor comprises few

component parts and is simple and rugged in construction, compact occupying small surface and is cost effective. It can be easily mounted to the refrigerator cabinet and is reliable and practically maintenance free. Because of the compactness, it is also easy to be transported and ideal for domestic use and also for use in offices, restaurants, hospitals and such other places in combination with the refrigerator.
The expansion device 11 gives a sudden adiabatic expansion to the chilled refrigerant entering the evaporator 4. Similarly, the expansion device 37 also gives a sudden adiabatic expansion to the cooled refrigerant exiting into the condensers 13 and 14 thereby improving the condensation efficiency of the condensers. The refrigerant in the heat sink 16 located outside the perforated housing 19 is effectively cooled by the atmospheric air. The slitted construction and open sides of the heat sink also allow free flow of atmospheric air over the heat sink to accelerate cooling of the refrigerant in the heat sink. The second air blower 17 blows atmospheric air onto the heat sink and accelerates the cooling of the refrigerant in the heat sink. The accumulator 44 accumulates the incoming refrigerant until a certain pressure is developed. Following this, the refrigerant flows into the compressor 42 to be compressed. Because of the accumulation of refrigerant in the accumulator, it is possible to compress the refrigerant in small amounts thereby reducing the capacity requirement of the compressor. According to the invention, refrigerant from a single compressor is judiciously split into the two condensers 13 and 14 of the water extractor and the condenser 8 and evaporator 7 of the refrigerator and effectively and optimally utilized to increase water recovery and at the same time chill the refrigerator inside to the required temperature thereby substantially reducing power requirement for operation of the

combination of the refrigerator and water-extractor and cost and also the overall size of the combination and the foot print requirement thereof.
As the heat sink is located outside the perforated housing, dissipation of heat from the heat sink to the condensers of the water extractor is eliminated. The power requirement of the compressor to cool the condensers to the required temperature is further reduced. The combination requires low power for its operation and is very much affordable, especially to low income groups of the society. Because of the cost effective nature and compactness of the combination, it can be widely used to extract water from atmosphere and also for refrigeration purpose. Safe and drinkable water is made available straight from atmosphere at a very low cost. It is understood that the compressor capacity or rating will obviously depend upon the water extraction requirement of the water extractor and chilling requirement of the refrigerator.
Chilling effect in the perforated housing 19 of the water extractor and chilling effect in the refrigerator is simultaneously controlled by the microcontroller at the required temperature by controlling the compression ratio of the compressor and the speed of rotation of the air blowers 15 and 17 and fan 5 in a synchronized and interdependable manner. The microcontroller also senses the temperature in the refrigerator through the thermostat. In case the compressor is overloaded, the overload cutout circuit 49 operates and disconnects the power supply to the compressor.
Using copper tubes for the condensers and heat sink of the water extractor, the heat transfer efficiency of the condensers and heat sink can be improved to increase the cooling effect in the perforated housing and water recovery. As the perforated housing and perforated plate of

condenser 13 are all preferably detachable and the heat sink is located outside the housing, the water extractor can be easily accessed and cleaned as and when required to maintain the required hygiene. By making of the condensers and heat sink of the water extractor with stainless steel and making the perforated housing, water collection tray and water collection tank with moulded plastics, it becomes easy to maintain hygienic conditions and to ensure long life for the water extractor.
In the refrigerator cum water extractor IB as illustrated in Fig 14 of the accompanying drawings, the refrigerator is a frost free refrigerator and comprises two fans 5 and 5a with the evaporator. In the refrigerator cum water extractor 1C as shown in Figs 15 and 16 of the accompanying drawings the refrigerant outlet end 36 of the heat sink 16 is connected to the refrigerant inlet ends 24 and 31 of the condensers 13 and 14 of the water extractor through a solenoid operated valve 51 and the expansion device 37. The solenoid operated valve is operated by the microcontroller. As and when water collection tank is about to be full, the microcontroller operates the valve and disconnects the refrigerant flow into the tubes23 and 30 of the condensers 13 and 14 of the water extractor and simultaneously controls the compression ratio of the compressor to recirculate the chilled refrigerant only through the evaporator 4 and condenser 8 of the refrigerator. On emptying the water collection tank, the microcontroller opens the valve and controls the operation of the compressor to allow the refrigerant to flow through the tubes of the condensers of the water extractor and the water extractor starts working.
According to the invention, to the best of our knowledge and information, we have, as a result of extensive research and development, designed and developed, for the first time in the world, a combination of a refrigerator cum atmospheric water extractor, in which the refrigerator and

atmospheric water extractor are functionally integrated in a judicious and ingenious manner and in a interdependable and synchronous manner to achieve the dual purpose of refrigeration and water extraction, respectively as required in a cost effective and efficient manner. A common microcontroller and a common compressor are devised whereby both the equipments are operated in a interdependable and synchronized manner. The common compressor capacity is selected to be adequate to run both the refrigerator and water extractor thereby achieving capital cost benefit and saving in power consumption. As the combination operates with a single on/off switch there is further cost benefit. Maintenance cost is also reduced as there is only one compressor.
Because of the savings in power consumption and maintenance, running cost of the combination is also reduced. Space for occupation of the combination is reduced, especially in the case of the configuration in which the water extractor is mounted to the refrigerator. The combination is also user friendly in that it can be operated with a single on/off switch and does not have to be switched on/off separately. As the refrigerant recirculation loop is common for the combination of the refrigerator and water extractor, the refrigeration system is optimally and efficiently utilized. The number of connector pipes required to form the refrigerant recirculation loop is substantially reduced thereby further reducing the cost. The combination of the invention operates on AC supply which is widely available and is also relatively cheap. Therefore, the combination can be widely and conveniently used anywhere AC is available.
It is understood that invention is basically in the functional integration of a refrigerator and the water extractor to operate them in a synchronized and interdependable manner to achieve the dual purpose of water extraction from the atmosphere and simultaneously refrigeration effect in

the refrigerator as required in a cost effective and efficient manner. However, both the equipments can be functionally integrated in a interdependable and synchronized manner without being physically integrated. The water extractor may include more than one first air blower and second air blower. The slitted and largely open space construction of the vertical walls of the second condenser and heat sink of the water extractor can be different. The geometry and profile of the perforated plate of the first condenser and vertical walls of the second condenser and heat sink can be different.
The water dispenser of the water collection tank can be different. The water extractor may include a temperature sensor located in the perforated housing 19 and connected to the microcontroller 46 for the microcontroller to sense the temperature in the perforated housing continuously and control the operation of both the equipments at the required temperature. The moisture depleted air exiting from the perforated housing is dry. Therefore, the water extractor also can be used as a air dehumidifier and the dehumidified air can be circulated in a room or the like. The water collection tank is optional and its mounting location can be different. In case there is no water collection tank, water is withdrawn directly from the water collection tray. Mounting location of the first and second condensers, first air blower and water collection tray along with perforated housing can be different. Such variations of the invention are obvious to a person skilled in the art and should be construed and understood within the scope of the invention. The scope of the invention should be construed and understood to be defined by and encompassed within the accompanying claims.

We Claim:
1. A refrigerator cum atmospheric water extractor, wherein the refrigerator comprises a
thermally insulated cabinet with multiple compartments, an evaporator with atleast one fan mounted in the cabinet, the evaporator having a refrigerant inlet end and a refrigerant outlet end and a condenser mounted to the cabinet and having a refrigerant inlet end and a refrigerant outlet end connected to the refrigerant inlet of the evaporator through a first expansion device and a thermostat located in the cabinet and wherein the atmospheric water extractor comprises a first condenser, a second condenser, at least one air blower, a heat sink and at least one second air blower, the first air blower, first condenser and second condenser of the water extractor are mounted on a water collection tray with the first air blower disposed in front of the first condenser and the water collection .tray mounted to the cabinet, a removable perforated housing disposed over the first air blower, first condenser, second condenser and water collection tray of the water extractor, the first condenser of the water extractor comprises a perforated plate and tube heat exchanger, in which the tube extends on the entire perforated plate in multiple turns and has a refrigerant inlet end and a refrigerant outlet end, the second condenser of the water extractor comprises a shell and tube heat exchanger disposed behind the first condenser of the water extractor and has a shell defined by a pair of opposing vertical walls of slitted structure disposed in spaced apart relationship with each other with the opposite sides open and held together at the bottom and top thereof and a tube extending on the entire vertical walls in multiple turns and having a refrigerant inlet end and a refrigerant outlet end, the second air blower of the water extractor and the heat sink are located outside the perforated housing and mounted to the cabinet exposed to the atmosphere with the second air blower of the water extractor disposed close to the heat sink, the heat sink comprises a shell and tube heat exchanger

defined by a pair of vertical side walls of slitted structure disposed in spaced apart relationship with each other with the opposite sides open and held together at the bottom and top thereof and a tube extending on the entire vertical walls in multiple turns and having a refrigerant inlet end and a refrigerant outlet end, the refrigerant outlet end of the tube of the heat sink is connected to the refrigerant inlet ends of the tubes of the first and second condensers of the water extractor through a second expansion device, a water collection tank mounted to the cabinet and connected to the water collection tray and provided with a water dispenser and a water level sensor disposed in the water collection tank, and wherein the refrigerator and water extractor are functionally integrated with a common compressor mounted to the cabinet and having a refrigerant inlet end connected to the refrigerant outlet ends of the tubes of the first and second condensers of the water extractor and the refrigerant outlet of the evaporator and further having a refrigerant outlet connected to the refrigerant inlet of the condenser of the refrigerator and refrigerant inlet end of the tube of the heat sink to form a closed refrigerant recirculation loop with the heat sink, condensers and evaporator and with a common microcontroller configured to sense the water level in the water collection tank through the water level sensor and temperature in the cabinet through the thermostat and to control the operation of the air blowers and fan and also to control the operation of the refrigerator and water extractor in a synchronized and interdependable manner, the microcontroller being operable with an AC power supply through an on/off switch.
2. The refrigerator cum water extractor as claimed in claim 1, wherein the condensers and water collection tray of the water extractor with the perforated housing are mounted at top of the cabinet and the heat sink and second air blower of the water extractor are mounted to a sidewall of the cabinet and the water collection tank is mounted to another sidewall of the cabinet.

3. The refrigerator cum water extractor as claimed in claim 1 or 2, wherein the outer surface of the condensers of the water extractor is plasma treated.
4. The refrigerator cum water extractor as claimed in claim 3, wherein the outer surface of the water condensers of the water extractor is plasma treated by subjecting the condensers to a high ion discharge at 25000 to 50000 volts for 20 to 30 seconds for each cm2 surface area of the condensers.
5. The refrigerator cum water extractor as claimed in claim 1 or 2, wherein the perforated plate of the first condenser of the water extractor is U-shaped and is adapted to detachably press fit over the sides of the vertical walls of the second condenser of the water extractor in spaced apart relationship with the confronting vertical wall of the second condenser of the water extractor.
6. The refrigerator cum water extractor as claimed in claim 1 or 2, wherein the slitted structure of the vertical walls of the second condenser of the water extractor and the heat sink are formed by arranging slats or louvers in spaced apart relationship with one another and holding the slats or louvers together.
7. The refrigerator cum water extractor as claimed in claim 1 or 2, wherein the refrigerant inlet of the compressor is connected to the refrigerant outlet ends of the tubes of the first and second condensers of the water extractor and the refrigerant outlet of the evaporator through an accumulator.
8. The refrigerator cum water extractor as claimed in claim 1 or 2, wherein the water level
sensor comprises an electronic sensor.

9. The refrigerator cum water extractor as claimed in claim 1 or 2, wherein the refrigerant outlet end of the tube of the heat sink is connected to the refrigerant inlet ends of the condensers of the water extractor through the second expansion device and a solenoid operated valve controlled by the microcontroller.
10. The refrigerator cum water extractor as claimed in claim 1 or 2, wherein the perforated housing and water collection tank are made of food grade molded plastics, the water collection tray is made of food grade moulded plastics or stainless steel and the perforated plate of the first condenser and the shells of the second condenser and heat sink of the water extractor are made of stainless steel and the tubes of the condensers and heat sink of the water extractor are made of copper..
11. The refrigerator cum water extractor as claimed in claim 1 or 2, wherein the water dispenser of the water collection tank comprises a tap.
12. The refrigerator cum water extractor as claimed in claim 1 or 2, wherein the water extractor comprises operational status indicator.
13.' The refrigerator cum water extractor as claimed in claim 12, wherein the operational status indicator comprises two differently coloured LEDs.
14. The refrigerator cum water extractor as claimed in claim 13, wherein the operational status indicator includes audio alarm such as hooter.

15. The refrigerator cum water extractor as claimed in claim 1 or 2, wherein the refrigerant inlet of the compressor is connected to the refrigerant outlet ends of the tubes of the condensers of the water extractor and the refrigerant outlet of the evaporator and the refrigerant outlet of the compressor is connected to the refrigerant inlet end of the tube of the heat sink and refrigerant inlet of the condenser of the refrigerator and the refrigerant outlet end of the tube of the heat sink is connected to the refrigerant inlet ends of the tubes of the condensers of the water extractor through connector pipes.
16. The refrigerator cum water extractor as claimed in claim 15, wherein the connector pipes are all made of copper.
17. The refrigerator cum water extractor as claimed in claim 1 or 2, wherein the refrigerator is frost free type and the evaporator is with two fans.
18. The refrigerator cum water extractor as claimed in claim 1 or 2, wherein the water extractor comprises a temperature sensor disposed in the perforated housing and connected to the microcontroller.